ANALISIS KUAT LEKAT TULANGAN BAMBU WULUNG TAKIKAN TIPE U JARAK 10 CM TERHADAP TULANGAN BAJA.
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ANALISIS KUAT LEKAT TULANGAN BAMBU WULUNG
TAKIKAN TIPE U JARAK 10 CM TERHADAP TULANGAN
BAJA
Analysis of Bond Strength Notched Bamboo Wulung Reinforcement type U
Distance 10 Cm of Steel Reinforcement
SKRIPSI
Disusun Untuk Memenuhi Persyaratan Memperoleh Gelar Sarjana Teknik
Pada Jurusan Teknik Sipil Fakultas Teknik
Universitas Sebelas Maret
Surakarta
Disusun oleh :
EKA JUNINGSIH
I 1112035
JURUSAN TEKNIK SIPIL FAKULTAS TEKNIK
UNIVERSITAS SEBELAS MARET
SURAKARTA
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HALAMAN MOTTO
“Intelligence is not the determinant of success, but hard work is the real determinant
of your success”
Kecerdasan bukan penentu kesuksesan, tetapi kerja keras merupakan penentu
kesuksesanmu yang sebenarnya
“Think big and act now”
Berpikirlah besar dan bertindaklah sekarang
“Coming together is a beginning, keeping together is progress, working together is
success”
Memulai bersama adalah sebuah awalan, menjaganya untuk tetap bersama adalah
sebuah kemajuan dan bias bekerja sama adalah sebuah kesuksesan
(Henry Ford)
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HALAMAN PERSEMBAHAN
Kedua Orang tua saya yang tak henti-hentinya mendoakan dan selalu
memberikan pengorbanan dengan penuh kasih sayang.
Buat adik-adik saya Dwi Haryono dan Tri Mardiyanti yang selalu
menyemangati dan mendoakan saya.
Buat pacar saya Dagda Raditya Rumarna yang selalu memberi semangat dan
dorongan serta mendoakan saya.
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PENGANTAR
Alhamdulilllah, segala puji bagi Allah yang telah melimpahkan rahmat dan nikmatNya, sehingga penyusun dapat menyelesaikan skripsi dengan judul “Analisis Kuat
Lekat Tulangan Bambu Wulung Takikan Tipe U Jarak 10 Cm Terhadap
Tulangan Baja”, sebagai salah satu syarat memperoleh gelar Sarjana di Jurusan
Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta.
Pada kesempatan ini penyusun mengucapkan terima kasih kepada semua pihak yang
telah membantu dalam menyelesaikan penelitian skripsi dan penyusunan laporannya.
Penyusun mengucapkan terima kasih kepada:
1. Agus Setiya Budi, ST, MT selaku Dosen Pembimbing I Skripsi.
2. Ir. Sugiyarto, MT selaku Dosen Pembimbing II Skripsi.
3. Ir. Slamet Prayitno, MT. dan Ir. Endang Rismunarsi, MT. sebagai Dosen Penguji
Pendadaran.
4. Semua Staf Laboratorium Bahan dan Struktur Jurusan Teknik Sipil Fakultas
Teknik Universitas Sebelas Maret Surakarta.
5. Rekan-rekan Tim Peneliti Bambu atas kerjasama dan bantuannya.
6. Semua teman-teman non reguler tahun 2012.
7. Teman-teman kos saya Hamida, Zulia, Atik, dan Tika yang selalu memberi
motivasi.
Penyusun menyadari bahwa dalam laporan ini masih terdapat kekurangan. Oleh
karena itu kritik dan saran yang membangun selalu kami harapkan. Semoga laporan
ini bermanfaat bagi semua pihak.
Surakarta, Juni 2015
Penyusun
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DAFTAR ISI
HALAMAN JUDUL .................................................................................................. i
HALAMAN PERSETUJUAN .................................................................................. ii
HALAMAN PENGESAHAN .................................................................................. iii
HALAMAN MOTTO .............................................................................................. iv
HALAMAN PERSEMBAHAN ............................................................................... v
ABSTRAK ................................................................................................................ vi
ABSTRACT ............................................................................................................. vii
KATA PENGANTAR ............................................................................................ viii
DAFTAR ISI ............................................................................................................. ix
DAFTAR GAMBAR .............................................................................................. xiii
DAFTAR TABEL .................................................................................................. xvi
DAFTAR NOTASI DAN SIMBOL .................................................................... xviii
DAFTAR LAMPIRAN ........................................................................................... xx
BAB 1 PENDAHULUAN ......................................................................................... 1
1.1.
Latar Belakang ................................................................................................ 1
1.2.
Rumusan Masalah ........................................................................................... 2
1.3.
Batasan Masalah ............................................................................................. 2
1.4.
Tujuan Penelitian ............................................................................................ 3
1.5.
Manfaat Penelitian .......................................................................................... 3
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BAB 2 TINJAUAN PUSTAKA DAN LANDASAN TEORI ................................. 4
2.1.
Tinjauan Pustaka .......................................................................................... 4
2.2.
Landasan Teori ............................................................................................. 5
2.2.1.
Bambu .......................................................................................................... 5
2.2.2.
Tulangan Bambu Bertakikan ........................................................................ 8
2.2.3.
Baja Tulangan ............................................................................................. 10
2.2.4.
Beton .......................................................................................................... 10
2.2.4.1. Semen PPC ................................................................................................. 11
2.2.4.2. Agregat ....................................................................................................... 11
2.2.4.3. Air .............................................................................................................. 13
2.2.4.4. Faktor Air Semen ........................................................................................ 13
2.2.5.
Kuat Lekat .................................................................................................. 13
2.2.6.
Uji Anova ................................................................................................... 17
BAB 3 METODE PENELITIAN ........................................................................... 18
3.1.
Tinjauan Umum ......................................................................................... 18
3.2.
Tahap Penelitian ......................................................................................... 18
3.3.
Benda Uji dan Bahan ................................................................................. 21
3.3.1.
Benda Uji ................................................................................................... 21
3.3.2.
Bahan ......................................................................................................... 22
3.3.3.
Peralatan Penelitian .................................................................................... 25
3.3.3.1. Timbangan ................................................................................................. 25
3.3.3.2. Ayakan ....................................................................................................... 26
3.3.3.3. Mesin Penggetar Ayakan (Siever Shaker) ................................................. 26
3.3.3.4. Oven ........................................................................................................... 26
3.3.3.5. Mesin Los Angeles ..................................................................................... 27
3.3.3.6. Cetakan Benda Uji ..................................................................................... 27
3.3.3.7. Kerucut Abrams .........................................................................................
28
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3.3.3.8. Alat Bantu ................................................................................................... 28
3.3.3.9. Molen ......................................................................................................... 29
3.3.3.10. Universal Testing Machine ........................................................................ 29
3.3.3.11. Compression Testing Machine ................................................................... 30
3.4.
Pengujian Pendahuluan .............................................................................. 30
3.4.1.
Pengujian Kuat tarik Baja Tulangan .......................................................... 30
3.4.2.
Pengujian Bambu ....................................................................................... 31
3.4.3.
Pengujian Bahan Pembentuk Beton ........................................................... 34
3.4.3.1. Agregat Halus ............................................................................................ 34
3.4.3.2. Agregat kasar ............................................................................................. 39
3.5.
Pembuatan Benda Uji Mix Design ............................................................. 43
3.5.1.
Pembuatan Benda Uji Mix Design ............................................................. 43
3.5.2.
Pengujian Kuat Tekan ................................................................................ 45
3.6.
Pembuatan Benda Uji Lekat ...................................................................... 46
3.6.1.
Tahapan Pembuatan Benda Uji .................................................................. 46
3.6.2.
Perawatan Benda Uji (Curing) ................................................................... 48
3.7.
Pengujian Kuat Lekat ................................................................................. 48
3.8.
Analisis Data .............................................................................................. 50
BAB 4 ANALISIS DATA DAN PEMBAHASAN ................................................ 51
4.1.
Hasil Pengujian Kuat Tarik Baja dan Bambu ............................................. 51
4.2.
Hasil Pengujian Material Beton ................................................................. 53
4.3.
Hasil Pengujian Slump ............................................................................... 58
4.4.
Hasil Pengujian Kuat Desak Beton ............................................................. 58
4.5.
Hasil Pengujian Kuat Lekat ....................................................................... 59
4.5.1.
Kuat Lekat Tulangan Baja Polos ................................................................ 59
4.5.2.
Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Sejajar Jarak 100 mm
Lebar Takikan 10 mm ................................................................................. 63
4.5.3.
Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Tidak Sejajar
Jarak 100 mm Lebar Takikan
10 mm
......................................................... 69
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4.5.4.
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Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Sejajar Jarak 100 mm
Lebar Takikan 20 mm ................................................................................. 73
4.5.5.
Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Tidak Sejajar
Jarak 100 mm Lebar Takikan 20 mm ......................................................... 78
4.6.
Hasil Uji Statistik Anova ........................................................................... 85
4.6.1.
Uji Kenormalan .......................................................................................... 85
4.6.2.
Uji Homogenitas Variansi .......................................................................... 85
4.6.3.
Uji One Way Anova .................................................................................... 86
4.6.4.
Uji Perbandingan ........................................................................................ 87
4.7.
Pembahasan ................................................................................................ 89
4.7.1.
Kuat Tarik Tulangan Baja dan Bambu ...................................................... 89
4.7.2.
Kuat Lekat Beton pada Beban Saat Sesar 0,25 mm .................................... 89
BAB 5 KESIMPULAN DAN SARAN ................................................................... 91
5.1.
Kesimpulan ................................................................................................ 91
5.2.
Saran ........................................................................................................... 91
DAFTAR PUSTAKA ............................................................................................. 92
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DAFTAR GAMBAR
Gambar 2.1. (1) Tipikal Bentuk Tulangan Baja Deformasi .......................................... 9
(2) Bambu Takikan .................................................................................. 9
Gambar 2.2. Beberapa Bentuk Takikan pada Tulangan Bambu ................................... 9
Gambar 2.3. Tulangan Bambu Takikan “U” Lebar Takikan 1 Cm dan 2 Cm Sejajar
dan Tidak Sejajar dengan Jarak 10 Cm .................................................. 10
Gambar 2.4. Pengujian Pull Out ................................................................................. 15
Gambar 2.5. Sesar antara Tulangan dan Beton ........................................................... 16
Gambar 3.1. Diagram Alir Penelitian ......................................................................... 20
Gambar 3.2. Gambar Takikan Jarak 10 Cm Lebar 1 Cm dan 2 Cm dengan Variasi
Sejajar dan Tidak Sejajar ....................................................................... 21
Gambar 3.3. Gambar Potongan dan Tampak Atas Benda Uji Lekat Beton............... 22
Gambar 3.4. Portland Pozolan Cement (PPC) ............................................................ 22
Gambar 3.5. Air .......................................................................................................... 23
Gambar 3.6. Pasir ........................................................................................................ 23
Gambar 3.7. Kerikil .................................................................................................... 24
Gambar 3.8. Tulangan Baja ........................................................................................ 24
Gambar 3.9. Bambu Wulung ...................................................................................... 25
Gambar 3.10.Timbangan............................................................................................. 25
Gambar 3.11.Ayakan .................................................................................................. 26
Gambar 3.12.Oven ...................................................................................................... 26
Gambar 3.13.Mesin Los Angeles ................................................................................ 27
Gambar 3.14.Cetakan Benda Uji ................................................................................ 27
Gambar 3.15.Kerucut Abrams .................................................................................... 28
Gambar 3.16.Alat Bantu ............................................................................................. 28
Gambar 3.17.Molen .................................................................................................... 29
Gambar 3.18.UTM ...................................................................................................... 29
Gambar 3.18.CTM ...................................................................................................... 30
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Gambar 3.20.Pengujian Kuat Tarik commit
Tulangan
Baja .................................................... 30
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Gambar 3.21. Uji Kuat Tarik Bambu Sejajar Serat .................................................... 31
Gambar 3.22. Pembuatan Benda Uji Kuat Geser dan Tekan Bambu ......................... 31
Gambar 3.23. Pengukuran Benda Uji Kuat Geser Bambu .......................................... 32
Gambar 3.24. Uji Kuat Geser Bambu ......................................................................... 32
Gambar 3.25. Uji Kuat Tekan Sejajar Serat ............................................................... 32
Gambar 3.26. Uji Kadar Air........................................................................................ 33
Gambar 3.27. Uji Modulus Elastisitas ........................................................................ 34
Gambar 3.28. Proses Pengujian Kadar Lumpur Pasir ................................................. 35
Gambar 3.29. Pengujian Kadar Zat Organik............................................................... 36
Gambar 3.30. Pengujian Sampel dengan Kerucut Terpancung .................................. 37
Gambar 3.31. Penimbangan Sampel Specific Gravity ................................................ 38
Gambar 3.32. Volumetricflash .................................................................................... 38
Gambar 3.33. Pengujian Gradasi Agregat Halus ........................................................ 39
Gambar 3.34. Proses Pencucian Agregat Kasar .......................................................... 40
Gambar 3.35. Proses Pengelapan Agregat Uji Specific Gravity ................................. 40
Gambar 3.36. Penimbangan Sampel Specific Grafity ................................................. 41
Gambar 3.37. Neraca Timbang ................................................................................... 41
Gambar 3.38. Proses Pengguncangan Ayakan ........................................................... 42
Gambar 3.39. Proses Pengujian Abrasi ....................................................................... 43
Gambar 3.40. Proses Penimbangan Material .............................................................. 44
Gambar 3.41. Proses Penyaringan Material ................................................................ 44
Gambar 3.42. Pembuatan Benda Uji Silinder ............................................................. 45
Gambar 3.43. Alat Uji Kuat Tekan Beton .................................................................. 45
Gambar 3.44. Pemotongan Bambu ............................................................................. 46
Gambar 3.45. Pembuatan Tulangan Bambu ............................................................... 46
Gambar 3.46. Proses Pencampuran Beton .................................................................. 47
Gambar 3.47. Penanaman Tulangan Bambu ............................................................... 47
Gambar 3.48. Benda Uji Lekat ................................................................................... 48
Gambar 3.49. Perawatan Benda Uji ............................................................................ 48
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Gambar 3.50. Uji Kuat Lekat Bambu
Betonto...............................................................
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Gambar 4.1. Grafik Gradasi Agregat Halus ................................................................ 55
Gambar 4.2. Grafik Gradasi Agregat Kasar................................................................ 57
Gambar 4.3. Uji Slump................................................................................................ 58
Gambar 4.4. Grafik Hubungan Beban-Sesar antara Beton dan Tulangan Baja
Diameter 8 mm ...................................................................................... 62
Gambar 4.5. Grafik Hubungan Beban-Sesar BWS1 ................................................... 67
Gambar 4.6. Grafik Hubungan Beban-Sesar BWTS1 ................................................ 72
Gambar 4.7. Grafik Hubungan Beban-Sesar BWS2 ................................................... 76
Gambar 4.8. Grafik Hubungan Beban-Sesar BWTS2 ................................................ 81
Gambar 4.9. Nilai Kuat Lekat Variasi Tulangan pada Beton ..................................... 84
Gambar 4.10.Tulangan Bambu Wulung Setelah Diuji .............................................. 90
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DAFTAR TABEL
Tabel 2.1. Berat Jenis Dari 6 Jenis Bambu (gr/cm2) .................................................. 6
Tabel 2.2. Jenis-jenis Semen Portland ..................................................................... 11
Tabel 2.3. Persyaratan Gradasi Agregat Halus ......................................................... 12
Tabel 2.4. Persyaratan Gradasi untuk Agregat Kasar ............................................... 12
Tabel 3.1. Tabel Perubahan Warna ........................................................................... 36
Tabel 4.1. Hasil Pengujian Kuat Tarik Baja dan Bambu .......................................... 52
Tabel 4.2. Hasil Pengujian Kandungan Lumpur pada Pasir Seberat 100 Gram. ...... 53
Tabel 4.3. Hasil Pengujian Specific Gravity Agregat Halus ..................................... 54
Tabel 4.4. Hasil Pengujian Gradasi Agregat Halus .................................................. 54
Tabel 4.5. Hasil Pengujian Spesific Gravity Agregat Kasar ..................................... 56
Tabel 4.6. Hasil Pengujian Gradasi Agregat Kasar .................................................. 56
Tabel 4.7. Hasil Pengujian Abrasi Agregat Kasar .................................................... 57
Tabel 4.8. Hasil Pengujian Kuat Desak Beton .......................................................... 58
Tabel 4.9. Sesar antara Beton dan Tulangan Baja Ø 8 mm ...................................... 59
Tabel 4.10. Kuat Lekat Beton dengan Tulangan Baja Polos (Ø 8 mm). .................... 63
Tabel 4.11. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Sejajar Jarak 100 mm Lebar Takikan 10 mm. ......................................... 64
Tabel 4.12. Hasil kuat lekat benda uji BWS1 ............................................................. 68
Tabel 4.13. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Tidak Sejajar Jarak 100 mm Lebar Takikan 10 mm ................................ 69
Tabel 4.14. Hasil kuat lekat benda uji BWTS1........................................................... 73
Tabel 4.15. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Sejajar Jarak 100 mm Lebar Takikan 20 mm .......................................... 73
Tabel 4.16. Hasil kuat lekat benda uji BWS2 ............................................................. 77
Tabel 4.17. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Tidak Sejajar Jarak 100 mm Lebar Takikan 20 mm ................................. 78
Tabel 4.18. Hasil kuat lekat benda uji BWTS2........................................................... 82
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Tabel 4.19. Kuat Lekat antara Berbagai
Variasi
Tulangan dan Beton ....................... 83
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Tabel 4.20. Hasil Uji Kenormalan .............................................................................. 85
Tabel 4.21. Hasil Homogenitas Variansi .................................................................... 86
Tabel 4.22. Hasil Uji One Way Anova........................................................................ 86
Tabel 4.23. Hasil Uji Perbandingan Tukey ................................................................. 87
Tabel 4.24. Hasil Kesimpulan ..................................................................................... 88
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DAFTAR LAMPIRAN
LAMPIRAN A
: Hasil Uji Pendahuluan Material
LAMPIRAN B
: Grafik Hasil Uji Pendahuluan Bambu dan Baja
LAMPIRAN C
: Rencana Campuran Adukan Beton
LAMPIRAN D
: Hasil Uji Pull Out
LAMPIRAN E
: Hasil Analisis Statistik
LAMPIRAN F
: Dokumentasi Penelitian
LAMPIRAN G
: Berkas Administrasi Skripsi
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DAFTAR NOTASI DAN SIMBOL
ASTM
= American Society for Testing and Materials
SKSNI
= Surat Keputusan Standar Nasional Indonesia
PBI
= Peraturan Beton Bertulang Indonesia
Ka
= Kadar Air (%)
Wb
= berat kering udara
Wa
= berat kering oven
BJ
= Berat jenis bambu
Wa
= Berat benda uji kering oven (gram)
Gb
= Berat air yang volumenya sama dengan volume benda uji kering
oven (gram)
tr //
= kuat tarik bambu sejajar serat (MPa)
Pmaks
= beban tarik maksimum (N)
A
= luas tampang tarik bambu (mm2)
�����
= kekuatan/tegangan tekan pada batas maksimum
E
= modulus elastisitas
σp
= kekuatan/tegangan tekan pada batas elastic
εp
= regangan tekan pada batas elastic
= kekuatan/tegangan geser bambu
P
= beban maksimum (kg)
L
= bentang bebas (cm)
b
= lebar takikan (mm)
c
= jarak antar takikan (mm)
d
= lebar efektif tulangan bambu (mm)
b
= lebar benda uji (cm)
h
= tebal benda uji (cm)
ds
= diameter tulangan baja (mm)
Ld
= panjang penanaman (mm)
lb
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= lebar tulangan bambu
(mm)
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tb
= tebal tulangan bambu (mm)
μ
=kuat lekat (MPa)
∆s
= sesar (mm)
z
= pertambahan panjang total (mm)
∆L
= pertambahan panjang bambu (mm)
Lo
= panjang bambu mula-mula (mm)
k
= konstanta
G0
= Pasir sebelum dicuci (kering 1100 C, 24 jam)
G1
= Pasir setelah dicuci (kering 1100 C, 24 jam)
Ab
= Luas penampang bambu (mm2)
Ad
= Luas penanaman (mm2)
As
= Luas penampang tulangan baja (mm2)
Lo
= Jarak Penjepitan (mm)
Ld
= Panjang Penyaluran (mm)
Es
= Modulus Elastisitas baja (MPa)
Ewulung
= Modulus Elastisitas bambu Wulung (MPa)
P
= Beban pada benda uji (N)
p
= Modulus halus butir pasir
Pleleh
= Beban leleh baja tulangan (N)
Pmaks
= Beban maksimum baja tulangan (N)
Sr
= Deviasi Standar (MPa)
f’c
= Kuat tekan beton (MPa)
f’cr
= Kuat Tekan Rerata (MPa)
M
= Nilai Tambah Kuat Tekan Beton Rencana (MPa)
Fas
= Faktor air semen
W
= Persentase berat pasir terhadap berat kerikil
leleh
= Tegangan leleh baja (MPa)
maks
= Tegangan maksimum baja (MPa)
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ABSTRAK
Eka,2015, Analisis Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U
Jarak 10 Cm Terhadap Tulangan Baja, Skripsi, Jurusan Teknik Sipil Fakultas
Teknik Universitas Sebelas Maret Surakarta,
Banyaknya pembangunan yang menggunakan struktur beton bertulang
menyebabkan kebutuhan tulangan baja sebagai tulangan beton akan meningkat
dan menjadi semakin langka karena bahan baku dari tulangan baja adalah biji
besi yang tidak dapat diperbaharui. Oleh sebab itu, perlu alternatif baru
pengganti tulangan baja pada beton. Bambu dipilih sebagai tulangan alternatif
beton karena bambu merupakan produk hasil alam yang renewable, murah,
mudah ditanam, pertumbuhan cepat, dapat mereduksi efek global warming.
Adanya lekatan antara tulangan dengan beton merupakan salah satu syarat
struktur beton bertulang supaya tidak selip. Takikan pada tulangan bambu dapat
membantu mengunci antara beton dan tulangan.
Metode yang digunakan dalam penelitian ini adalah metode eksperimen
laboratorium yang dilakukan di Laboratorium Bahan dan Struktur Fakultas
Teknik Universitas Sebelas Maret Surakarta. Benda uji yang digunakan dalam
penelitian ini beton silinder dengan diameter 150 mm dan tinggi 300 mm.
Tulangan bambu yang digunakan adalah bambu wulung takikan tipe U jarak 10
cm dengan dimensi lebar 20 mm dan tebal 5,2 mm lebar takikan 1 cm dan 2 cm
dengan variasi sejajar dan tidak sejajar. Sebagai pembanding tulangan baja polos
dengan diameter 8 mm. Tulangan ditaman pada pusat beton silinder sedalam 250
mm.
Dari hasil pengujian pull out diperoleh beban yang bervariasi kemudian diuji
statistik kenormalan dan menghasilkan rata-rata penyebaran yang normal dan
merata. Dengan uji anova didapatkan perbandingan rata-rata bambu terhadap baja
yang berbeda dan bambu terhadap bambu memiliki rata-rata sama. Nilai kuat
lekat rerata beton dengan tulangan bambu wulung takikan tipe U jarak 100 mm
sejajar lebar takikan 10 mm sebesar 0,130 MPa dan nilai kuat lekat rerata beton
dengan tulangan bambu wulung takikan tipe U jarak 100 mm sejajar lebar takikan
20 mm sebesar 0,136 MPa. Nilai kuat lekat rerata beton dengan tulangan bambu
wulung takikan tipe U jarak 100 mm tidak sejajar lebar takikan 10 mm sebesar
0,054 MPa dan nilai kuat lekat rerata beton dengan tulangan bambu wulung
takikan tipe U jarak 100 mm tidak sejajar lebar takikan 20 mm sebesar 0,122
MPa. Nilai kuat lekat rerata beton dengan tulangan baja sebesar 0,548 MPa. Dari
data diatas dapat ditarik kesimpulan bahwa nilai kuat lekat rerata beton dengan
tulangan bambu wulung takikan sejajar sebesar 0,248 kali dari nilai kuat lekat
tulangan baja polos diameter 8 mm dengan presentasi sebesar 24,80 %. Nilai kuat
lekat rerata beton dengan tulangan bambu wulung takikan tidak sejajar sebesar
0,222 kali dari nilai kuat lekat tulangan baja polos diameter 8 mm dengan
presentasi sebesar 22,20 %.
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Kata Kunci: bambu wulung, baja, beton, takikan, kuat lekat.
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ABSTRACT
Eka, 2015, Analysis of Bond Strength Notched Bamboo Wulung Reinforcement
U Type Distance 10 cm Against Steel Reinforcement, Skripsi, Department of
Civil Engineering Faculty of Engineering, Sebelas Maret University Surakarta,
The amount of development that use reinforced concrete structures led to the need
of reinforcing steel as reinforcement of concrete will increase and become
increasingly scarce because the raw material of reinforcing steel is iron ore that
can not be renewed, Therefore, it needs a new alternative replacement of steel
reinforcement in concrete, Bamboo was chosen as an alternative to concrete
reinforcement because bamboo is a renewable natural products, inexpensive, easy
to grow, fast growth, can reduce the effects of global warming, Their appendage
between concrete reinforcement is one of the requirements for reinforced concrete
structures , Notches on bamboo reinforcement can help lock between concrete and
reinforcement,
The method used in this research is the method of laboratory experiments
conducted at the Laboratory of Materials and Structures of the Faculty of
Engineering, Sebelas Maret University Surakarta, Specimens used in this study a
concrete cylinder with a diameter of 150 mm and a height of 300 mm,
Reinforcement of bamboo used is a U-type bamboo wulung notch distance of 10
cm with a width dimension of 20 mm and a thickness of 5.2 mm wide indentation
1 cm and 2 cm with variations in parallel and not parallel, For comparison
reinforcing steel with a diameter of 8 mm plain, Reinforcement the park in the
center of the cylinder as deep as 250 mm concrete,
Pull out of the test results obtained by varying loads are then tested statistical
normality and the average yield spread of the normal and evenly, With ANOVA
test found the average ratio of the different steel bamboo and bamboo for bamboo
has the same averrage, Strong bonding values mean concrete with reinforcement
bamboo wulung U-type notch distance of 100 mm wide parallel notches 10 mm
by 0.130 MPa and values mean strong bonding of concrete with reinforcement
bamboo wulung U-type notch distance of 100 mm wide parallel notches 20 mm
of 0.136 MPa, The mean value of strong bonding with reinforced concrete U-type
bamboo wulung notch distance of 100 mm is not parallel notches 10 mm wide by
0.054 MPa and a mean value of the strong bonding of concrete with
reinforcement bamboo wulung U-type notch distance of 100 mm is not parallel
notches 20 mm wide by 0.122 MPa, Strong bonding values mean concrete with
steel reinforcement amounting to 0.548 MPa, From the above data it can be
deduced that the average value of the strong bonding of concrete with
reinforcement of bamboo wulung is parallel notches 0.248 times of the value of
strong bonding plain steel reinforcement diameter of 8 mm with presentation 24,8
%. the average value of the strong bonding of concrete with reinforcement of
bamboo wulung is not parallel notches 0.248 times of the value of strong bonding
plain steel reinforcement diameter of 8 mm with presentation 24,8 %.
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Key Word: bamboo wulung. Steel.commit
Concrete.
Notch. Bond strength,
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ANALISIS KUAT LEKAT TULANGAN BAMBU WULUNG
TAKIKAN TIPE U JARAK 10 CM TERHADAP TULANGAN
BAJA
Analysis of Bond Strength Notched Bamboo Wulung Reinforcement type U
Distance 10 Cm of Steel Reinforcement
SKRIPSI
Disusun Untuk Memenuhi Persyaratan Memperoleh Gelar Sarjana Teknik
Pada Jurusan Teknik Sipil Fakultas Teknik
Universitas Sebelas Maret
Surakarta
Disusun oleh :
EKA JUNINGSIH
I 1112035
JURUSAN TEKNIK SIPIL FAKULTAS TEKNIK
UNIVERSITAS SEBELAS MARET
SURAKARTA
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HALAMAN MOTTO
“Intelligence is not the determinant of success, but hard work is the real determinant
of your success”
Kecerdasan bukan penentu kesuksesan, tetapi kerja keras merupakan penentu
kesuksesanmu yang sebenarnya
“Think big and act now”
Berpikirlah besar dan bertindaklah sekarang
“Coming together is a beginning, keeping together is progress, working together is
success”
Memulai bersama adalah sebuah awalan, menjaganya untuk tetap bersama adalah
sebuah kemajuan dan bias bekerja sama adalah sebuah kesuksesan
(Henry Ford)
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HALAMAN PERSEMBAHAN
Kedua Orang tua saya yang tak henti-hentinya mendoakan dan selalu
memberikan pengorbanan dengan penuh kasih sayang.
Buat adik-adik saya Dwi Haryono dan Tri Mardiyanti yang selalu
menyemangati dan mendoakan saya.
Buat pacar saya Dagda Raditya Rumarna yang selalu memberi semangat dan
dorongan serta mendoakan saya.
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PENGANTAR
Alhamdulilllah, segala puji bagi Allah yang telah melimpahkan rahmat dan nikmatNya, sehingga penyusun dapat menyelesaikan skripsi dengan judul “Analisis Kuat
Lekat Tulangan Bambu Wulung Takikan Tipe U Jarak 10 Cm Terhadap
Tulangan Baja”, sebagai salah satu syarat memperoleh gelar Sarjana di Jurusan
Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta.
Pada kesempatan ini penyusun mengucapkan terima kasih kepada semua pihak yang
telah membantu dalam menyelesaikan penelitian skripsi dan penyusunan laporannya.
Penyusun mengucapkan terima kasih kepada:
1. Agus Setiya Budi, ST, MT selaku Dosen Pembimbing I Skripsi.
2. Ir. Sugiyarto, MT selaku Dosen Pembimbing II Skripsi.
3. Ir. Slamet Prayitno, MT. dan Ir. Endang Rismunarsi, MT. sebagai Dosen Penguji
Pendadaran.
4. Semua Staf Laboratorium Bahan dan Struktur Jurusan Teknik Sipil Fakultas
Teknik Universitas Sebelas Maret Surakarta.
5. Rekan-rekan Tim Peneliti Bambu atas kerjasama dan bantuannya.
6. Semua teman-teman non reguler tahun 2012.
7. Teman-teman kos saya Hamida, Zulia, Atik, dan Tika yang selalu memberi
motivasi.
Penyusun menyadari bahwa dalam laporan ini masih terdapat kekurangan. Oleh
karena itu kritik dan saran yang membangun selalu kami harapkan. Semoga laporan
ini bermanfaat bagi semua pihak.
Surakarta, Juni 2015
Penyusun
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DAFTAR ISI
HALAMAN JUDUL .................................................................................................. i
HALAMAN PERSETUJUAN .................................................................................. ii
HALAMAN PENGESAHAN .................................................................................. iii
HALAMAN MOTTO .............................................................................................. iv
HALAMAN PERSEMBAHAN ............................................................................... v
ABSTRAK ................................................................................................................ vi
ABSTRACT ............................................................................................................. vii
KATA PENGANTAR ............................................................................................ viii
DAFTAR ISI ............................................................................................................. ix
DAFTAR GAMBAR .............................................................................................. xiii
DAFTAR TABEL .................................................................................................. xvi
DAFTAR NOTASI DAN SIMBOL .................................................................... xviii
DAFTAR LAMPIRAN ........................................................................................... xx
BAB 1 PENDAHULUAN ......................................................................................... 1
1.1.
Latar Belakang ................................................................................................ 1
1.2.
Rumusan Masalah ........................................................................................... 2
1.3.
Batasan Masalah ............................................................................................. 2
1.4.
Tujuan Penelitian ............................................................................................ 3
1.5.
Manfaat Penelitian .......................................................................................... 3
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BAB 2 TINJAUAN PUSTAKA DAN LANDASAN TEORI ................................. 4
2.1.
Tinjauan Pustaka .......................................................................................... 4
2.2.
Landasan Teori ............................................................................................. 5
2.2.1.
Bambu .......................................................................................................... 5
2.2.2.
Tulangan Bambu Bertakikan ........................................................................ 8
2.2.3.
Baja Tulangan ............................................................................................. 10
2.2.4.
Beton .......................................................................................................... 10
2.2.4.1. Semen PPC ................................................................................................. 11
2.2.4.2. Agregat ....................................................................................................... 11
2.2.4.3. Air .............................................................................................................. 13
2.2.4.4. Faktor Air Semen ........................................................................................ 13
2.2.5.
Kuat Lekat .................................................................................................. 13
2.2.6.
Uji Anova ................................................................................................... 17
BAB 3 METODE PENELITIAN ........................................................................... 18
3.1.
Tinjauan Umum ......................................................................................... 18
3.2.
Tahap Penelitian ......................................................................................... 18
3.3.
Benda Uji dan Bahan ................................................................................. 21
3.3.1.
Benda Uji ................................................................................................... 21
3.3.2.
Bahan ......................................................................................................... 22
3.3.3.
Peralatan Penelitian .................................................................................... 25
3.3.3.1. Timbangan ................................................................................................. 25
3.3.3.2. Ayakan ....................................................................................................... 26
3.3.3.3. Mesin Penggetar Ayakan (Siever Shaker) ................................................. 26
3.3.3.4. Oven ........................................................................................................... 26
3.3.3.5. Mesin Los Angeles ..................................................................................... 27
3.3.3.6. Cetakan Benda Uji ..................................................................................... 27
3.3.3.7. Kerucut Abrams .........................................................................................
28
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3.3.3.8. Alat Bantu ................................................................................................... 28
3.3.3.9. Molen ......................................................................................................... 29
3.3.3.10. Universal Testing Machine ........................................................................ 29
3.3.3.11. Compression Testing Machine ................................................................... 30
3.4.
Pengujian Pendahuluan .............................................................................. 30
3.4.1.
Pengujian Kuat tarik Baja Tulangan .......................................................... 30
3.4.2.
Pengujian Bambu ....................................................................................... 31
3.4.3.
Pengujian Bahan Pembentuk Beton ........................................................... 34
3.4.3.1. Agregat Halus ............................................................................................ 34
3.4.3.2. Agregat kasar ............................................................................................. 39
3.5.
Pembuatan Benda Uji Mix Design ............................................................. 43
3.5.1.
Pembuatan Benda Uji Mix Design ............................................................. 43
3.5.2.
Pengujian Kuat Tekan ................................................................................ 45
3.6.
Pembuatan Benda Uji Lekat ...................................................................... 46
3.6.1.
Tahapan Pembuatan Benda Uji .................................................................. 46
3.6.2.
Perawatan Benda Uji (Curing) ................................................................... 48
3.7.
Pengujian Kuat Lekat ................................................................................. 48
3.8.
Analisis Data .............................................................................................. 50
BAB 4 ANALISIS DATA DAN PEMBAHASAN ................................................ 51
4.1.
Hasil Pengujian Kuat Tarik Baja dan Bambu ............................................. 51
4.2.
Hasil Pengujian Material Beton ................................................................. 53
4.3.
Hasil Pengujian Slump ............................................................................... 58
4.4.
Hasil Pengujian Kuat Desak Beton ............................................................. 58
4.5.
Hasil Pengujian Kuat Lekat ....................................................................... 59
4.5.1.
Kuat Lekat Tulangan Baja Polos ................................................................ 59
4.5.2.
Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Sejajar Jarak 100 mm
Lebar Takikan 10 mm ................................................................................. 63
4.5.3.
Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Tidak Sejajar
Jarak 100 mm Lebar Takikan
10 mm
......................................................... 69
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Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Sejajar Jarak 100 mm
Lebar Takikan 20 mm ................................................................................. 73
4.5.5.
Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Tidak Sejajar
Jarak 100 mm Lebar Takikan 20 mm ......................................................... 78
4.6.
Hasil Uji Statistik Anova ........................................................................... 85
4.6.1.
Uji Kenormalan .......................................................................................... 85
4.6.2.
Uji Homogenitas Variansi .......................................................................... 85
4.6.3.
Uji One Way Anova .................................................................................... 86
4.6.4.
Uji Perbandingan ........................................................................................ 87
4.7.
Pembahasan ................................................................................................ 89
4.7.1.
Kuat Tarik Tulangan Baja dan Bambu ...................................................... 89
4.7.2.
Kuat Lekat Beton pada Beban Saat Sesar 0,25 mm .................................... 89
BAB 5 KESIMPULAN DAN SARAN ................................................................... 91
5.1.
Kesimpulan ................................................................................................ 91
5.2.
Saran ........................................................................................................... 91
DAFTAR PUSTAKA ............................................................................................. 92
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DAFTAR GAMBAR
Gambar 2.1. (1) Tipikal Bentuk Tulangan Baja Deformasi .......................................... 9
(2) Bambu Takikan .................................................................................. 9
Gambar 2.2. Beberapa Bentuk Takikan pada Tulangan Bambu ................................... 9
Gambar 2.3. Tulangan Bambu Takikan “U” Lebar Takikan 1 Cm dan 2 Cm Sejajar
dan Tidak Sejajar dengan Jarak 10 Cm .................................................. 10
Gambar 2.4. Pengujian Pull Out ................................................................................. 15
Gambar 2.5. Sesar antara Tulangan dan Beton ........................................................... 16
Gambar 3.1. Diagram Alir Penelitian ......................................................................... 20
Gambar 3.2. Gambar Takikan Jarak 10 Cm Lebar 1 Cm dan 2 Cm dengan Variasi
Sejajar dan Tidak Sejajar ....................................................................... 21
Gambar 3.3. Gambar Potongan dan Tampak Atas Benda Uji Lekat Beton............... 22
Gambar 3.4. Portland Pozolan Cement (PPC) ............................................................ 22
Gambar 3.5. Air .......................................................................................................... 23
Gambar 3.6. Pasir ........................................................................................................ 23
Gambar 3.7. Kerikil .................................................................................................... 24
Gambar 3.8. Tulangan Baja ........................................................................................ 24
Gambar 3.9. Bambu Wulung ...................................................................................... 25
Gambar 3.10.Timbangan............................................................................................. 25
Gambar 3.11.Ayakan .................................................................................................. 26
Gambar 3.12.Oven ...................................................................................................... 26
Gambar 3.13.Mesin Los Angeles ................................................................................ 27
Gambar 3.14.Cetakan Benda Uji ................................................................................ 27
Gambar 3.15.Kerucut Abrams .................................................................................... 28
Gambar 3.16.Alat Bantu ............................................................................................. 28
Gambar 3.17.Molen .................................................................................................... 29
Gambar 3.18.UTM ...................................................................................................... 29
Gambar 3.18.CTM ...................................................................................................... 30
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Gambar 3.20.Pengujian Kuat Tarik commit
Tulangan
Baja .................................................... 30
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Gambar 3.21. Uji Kuat Tarik Bambu Sejajar Serat .................................................... 31
Gambar 3.22. Pembuatan Benda Uji Kuat Geser dan Tekan Bambu ......................... 31
Gambar 3.23. Pengukuran Benda Uji Kuat Geser Bambu .......................................... 32
Gambar 3.24. Uji Kuat Geser Bambu ......................................................................... 32
Gambar 3.25. Uji Kuat Tekan Sejajar Serat ............................................................... 32
Gambar 3.26. Uji Kadar Air........................................................................................ 33
Gambar 3.27. Uji Modulus Elastisitas ........................................................................ 34
Gambar 3.28. Proses Pengujian Kadar Lumpur Pasir ................................................. 35
Gambar 3.29. Pengujian Kadar Zat Organik............................................................... 36
Gambar 3.30. Pengujian Sampel dengan Kerucut Terpancung .................................. 37
Gambar 3.31. Penimbangan Sampel Specific Gravity ................................................ 38
Gambar 3.32. Volumetricflash .................................................................................... 38
Gambar 3.33. Pengujian Gradasi Agregat Halus ........................................................ 39
Gambar 3.34. Proses Pencucian Agregat Kasar .......................................................... 40
Gambar 3.35. Proses Pengelapan Agregat Uji Specific Gravity ................................. 40
Gambar 3.36. Penimbangan Sampel Specific Grafity ................................................. 41
Gambar 3.37. Neraca Timbang ................................................................................... 41
Gambar 3.38. Proses Pengguncangan Ayakan ........................................................... 42
Gambar 3.39. Proses Pengujian Abrasi ....................................................................... 43
Gambar 3.40. Proses Penimbangan Material .............................................................. 44
Gambar 3.41. Proses Penyaringan Material ................................................................ 44
Gambar 3.42. Pembuatan Benda Uji Silinder ............................................................. 45
Gambar 3.43. Alat Uji Kuat Tekan Beton .................................................................. 45
Gambar 3.44. Pemotongan Bambu ............................................................................. 46
Gambar 3.45. Pembuatan Tulangan Bambu ............................................................... 46
Gambar 3.46. Proses Pencampuran Beton .................................................................. 47
Gambar 3.47. Penanaman Tulangan Bambu ............................................................... 47
Gambar 3.48. Benda Uji Lekat ................................................................................... 48
Gambar 3.49. Perawatan Benda Uji ............................................................................ 48
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Gambar 3.50. Uji Kuat Lekat Bambu
Betonto...............................................................
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Gambar 4.1. Grafik Gradasi Agregat Halus ................................................................ 55
Gambar 4.2. Grafik Gradasi Agregat Kasar................................................................ 57
Gambar 4.3. Uji Slump................................................................................................ 58
Gambar 4.4. Grafik Hubungan Beban-Sesar antara Beton dan Tulangan Baja
Diameter 8 mm ...................................................................................... 62
Gambar 4.5. Grafik Hubungan Beban-Sesar BWS1 ................................................... 67
Gambar 4.6. Grafik Hubungan Beban-Sesar BWTS1 ................................................ 72
Gambar 4.7. Grafik Hubungan Beban-Sesar BWS2 ................................................... 76
Gambar 4.8. Grafik Hubungan Beban-Sesar BWTS2 ................................................ 81
Gambar 4.9. Nilai Kuat Lekat Variasi Tulangan pada Beton ..................................... 84
Gambar 4.10.Tulangan Bambu Wulung Setelah Diuji .............................................. 90
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DAFTAR TABEL
Tabel 2.1. Berat Jenis Dari 6 Jenis Bambu (gr/cm2) .................................................. 6
Tabel 2.2. Jenis-jenis Semen Portland ..................................................................... 11
Tabel 2.3. Persyaratan Gradasi Agregat Halus ......................................................... 12
Tabel 2.4. Persyaratan Gradasi untuk Agregat Kasar ............................................... 12
Tabel 3.1. Tabel Perubahan Warna ........................................................................... 36
Tabel 4.1. Hasil Pengujian Kuat Tarik Baja dan Bambu .......................................... 52
Tabel 4.2. Hasil Pengujian Kandungan Lumpur pada Pasir Seberat 100 Gram. ...... 53
Tabel 4.3. Hasil Pengujian Specific Gravity Agregat Halus ..................................... 54
Tabel 4.4. Hasil Pengujian Gradasi Agregat Halus .................................................. 54
Tabel 4.5. Hasil Pengujian Spesific Gravity Agregat Kasar ..................................... 56
Tabel 4.6. Hasil Pengujian Gradasi Agregat Kasar .................................................. 56
Tabel 4.7. Hasil Pengujian Abrasi Agregat Kasar .................................................... 57
Tabel 4.8. Hasil Pengujian Kuat Desak Beton .......................................................... 58
Tabel 4.9. Sesar antara Beton dan Tulangan Baja Ø 8 mm ...................................... 59
Tabel 4.10. Kuat Lekat Beton dengan Tulangan Baja Polos (Ø 8 mm). .................... 63
Tabel 4.11. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Sejajar Jarak 100 mm Lebar Takikan 10 mm. ......................................... 64
Tabel 4.12. Hasil kuat lekat benda uji BWS1 ............................................................. 68
Tabel 4.13. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Tidak Sejajar Jarak 100 mm Lebar Takikan 10 mm ................................ 69
Tabel 4.14. Hasil kuat lekat benda uji BWTS1........................................................... 73
Tabel 4.15. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Sejajar Jarak 100 mm Lebar Takikan 20 mm .......................................... 73
Tabel 4.16. Hasil kuat lekat benda uji BWS2 ............................................................. 77
Tabel 4.17. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U
Tidak Sejajar Jarak 100 mm Lebar Takikan 20 mm ................................. 78
Tabel 4.18. Hasil kuat lekat benda uji BWTS2........................................................... 82
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Tabel 4.19. Kuat Lekat antara Berbagai
Variasi
Tulangan dan Beton ....................... 83
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Tabel 4.20. Hasil Uji Kenormalan .............................................................................. 85
Tabel 4.21. Hasil Homogenitas Variansi .................................................................... 86
Tabel 4.22. Hasil Uji One Way Anova........................................................................ 86
Tabel 4.23. Hasil Uji Perbandingan Tukey ................................................................. 87
Tabel 4.24. Hasil Kesimpulan ..................................................................................... 88
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DAFTAR LAMPIRAN
LAMPIRAN A
: Hasil Uji Pendahuluan Material
LAMPIRAN B
: Grafik Hasil Uji Pendahuluan Bambu dan Baja
LAMPIRAN C
: Rencana Campuran Adukan Beton
LAMPIRAN D
: Hasil Uji Pull Out
LAMPIRAN E
: Hasil Analisis Statistik
LAMPIRAN F
: Dokumentasi Penelitian
LAMPIRAN G
: Berkas Administrasi Skripsi
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DAFTAR NOTASI DAN SIMBOL
ASTM
= American Society for Testing and Materials
SKSNI
= Surat Keputusan Standar Nasional Indonesia
PBI
= Peraturan Beton Bertulang Indonesia
Ka
= Kadar Air (%)
Wb
= berat kering udara
Wa
= berat kering oven
BJ
= Berat jenis bambu
Wa
= Berat benda uji kering oven (gram)
Gb
= Berat air yang volumenya sama dengan volume benda uji kering
oven (gram)
tr //
= kuat tarik bambu sejajar serat (MPa)
Pmaks
= beban tarik maksimum (N)
A
= luas tampang tarik bambu (mm2)
�����
= kekuatan/tegangan tekan pada batas maksimum
E
= modulus elastisitas
σp
= kekuatan/tegangan tekan pada batas elastic
εp
= regangan tekan pada batas elastic
= kekuatan/tegangan geser bambu
P
= beban maksimum (kg)
L
= bentang bebas (cm)
b
= lebar takikan (mm)
c
= jarak antar takikan (mm)
d
= lebar efektif tulangan bambu (mm)
b
= lebar benda uji (cm)
h
= tebal benda uji (cm)
ds
= diameter tulangan baja (mm)
Ld
= panjang penanaman (mm)
lb
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= lebar tulangan bambu
(mm)
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tb
= tebal tulangan bambu (mm)
μ
=kuat lekat (MPa)
∆s
= sesar (mm)
z
= pertambahan panjang total (mm)
∆L
= pertambahan panjang bambu (mm)
Lo
= panjang bambu mula-mula (mm)
k
= konstanta
G0
= Pasir sebelum dicuci (kering 1100 C, 24 jam)
G1
= Pasir setelah dicuci (kering 1100 C, 24 jam)
Ab
= Luas penampang bambu (mm2)
Ad
= Luas penanaman (mm2)
As
= Luas penampang tulangan baja (mm2)
Lo
= Jarak Penjepitan (mm)
Ld
= Panjang Penyaluran (mm)
Es
= Modulus Elastisitas baja (MPa)
Ewulung
= Modulus Elastisitas bambu Wulung (MPa)
P
= Beban pada benda uji (N)
p
= Modulus halus butir pasir
Pleleh
= Beban leleh baja tulangan (N)
Pmaks
= Beban maksimum baja tulangan (N)
Sr
= Deviasi Standar (MPa)
f’c
= Kuat tekan beton (MPa)
f’cr
= Kuat Tekan Rerata (MPa)
M
= Nilai Tambah Kuat Tekan Beton Rencana (MPa)
Fas
= Faktor air semen
W
= Persentase berat pasir terhadap berat kerikil
leleh
= Tegangan leleh baja (MPa)
maks
= Tegangan maksimum baja (MPa)
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ABSTRAK
Eka,2015, Analisis Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U
Jarak 10 Cm Terhadap Tulangan Baja, Skripsi, Jurusan Teknik Sipil Fakultas
Teknik Universitas Sebelas Maret Surakarta,
Banyaknya pembangunan yang menggunakan struktur beton bertulang
menyebabkan kebutuhan tulangan baja sebagai tulangan beton akan meningkat
dan menjadi semakin langka karena bahan baku dari tulangan baja adalah biji
besi yang tidak dapat diperbaharui. Oleh sebab itu, perlu alternatif baru
pengganti tulangan baja pada beton. Bambu dipilih sebagai tulangan alternatif
beton karena bambu merupakan produk hasil alam yang renewable, murah,
mudah ditanam, pertumbuhan cepat, dapat mereduksi efek global warming.
Adanya lekatan antara tulangan dengan beton merupakan salah satu syarat
struktur beton bertulang supaya tidak selip. Takikan pada tulangan bambu dapat
membantu mengunci antara beton dan tulangan.
Metode yang digunakan dalam penelitian ini adalah metode eksperimen
laboratorium yang dilakukan di Laboratorium Bahan dan Struktur Fakultas
Teknik Universitas Sebelas Maret Surakarta. Benda uji yang digunakan dalam
penelitian ini beton silinder dengan diameter 150 mm dan tinggi 300 mm.
Tulangan bambu yang digunakan adalah bambu wulung takikan tipe U jarak 10
cm dengan dimensi lebar 20 mm dan tebal 5,2 mm lebar takikan 1 cm dan 2 cm
dengan variasi sejajar dan tidak sejajar. Sebagai pembanding tulangan baja polos
dengan diameter 8 mm. Tulangan ditaman pada pusat beton silinder sedalam 250
mm.
Dari hasil pengujian pull out diperoleh beban yang bervariasi kemudian diuji
statistik kenormalan dan menghasilkan rata-rata penyebaran yang normal dan
merata. Dengan uji anova didapatkan perbandingan rata-rata bambu terhadap baja
yang berbeda dan bambu terhadap bambu memiliki rata-rata sama. Nilai kuat
lekat rerata beton dengan tulangan bambu wulung takikan tipe U jarak 100 mm
sejajar lebar takikan 10 mm sebesar 0,130 MPa dan nilai kuat lekat rerata beton
dengan tulangan bambu wulung takikan tipe U jarak 100 mm sejajar lebar takikan
20 mm sebesar 0,136 MPa. Nilai kuat lekat rerata beton dengan tulangan bambu
wulung takikan tipe U jarak 100 mm tidak sejajar lebar takikan 10 mm sebesar
0,054 MPa dan nilai kuat lekat rerata beton dengan tulangan bambu wulung
takikan tipe U jarak 100 mm tidak sejajar lebar takikan 20 mm sebesar 0,122
MPa. Nilai kuat lekat rerata beton dengan tulangan baja sebesar 0,548 MPa. Dari
data diatas dapat ditarik kesimpulan bahwa nilai kuat lekat rerata beton dengan
tulangan bambu wulung takikan sejajar sebesar 0,248 kali dari nilai kuat lekat
tulangan baja polos diameter 8 mm dengan presentasi sebesar 24,80 %. Nilai kuat
lekat rerata beton dengan tulangan bambu wulung takikan tidak sejajar sebesar
0,222 kali dari nilai kuat lekat tulangan baja polos diameter 8 mm dengan
presentasi sebesar 22,20 %.
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Kata Kunci: bambu wulung, baja, beton, takikan, kuat lekat.
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ABSTRACT
Eka, 2015, Analysis of Bond Strength Notched Bamboo Wulung Reinforcement
U Type Distance 10 cm Against Steel Reinforcement, Skripsi, Department of
Civil Engineering Faculty of Engineering, Sebelas Maret University Surakarta,
The amount of development that use reinforced concrete structures led to the need
of reinforcing steel as reinforcement of concrete will increase and become
increasingly scarce because the raw material of reinforcing steel is iron ore that
can not be renewed, Therefore, it needs a new alternative replacement of steel
reinforcement in concrete, Bamboo was chosen as an alternative to concrete
reinforcement because bamboo is a renewable natural products, inexpensive, easy
to grow, fast growth, can reduce the effects of global warming, Their appendage
between concrete reinforcement is one of the requirements for reinforced concrete
structures , Notches on bamboo reinforcement can help lock between concrete and
reinforcement,
The method used in this research is the method of laboratory experiments
conducted at the Laboratory of Materials and Structures of the Faculty of
Engineering, Sebelas Maret University Surakarta, Specimens used in this study a
concrete cylinder with a diameter of 150 mm and a height of 300 mm,
Reinforcement of bamboo used is a U-type bamboo wulung notch distance of 10
cm with a width dimension of 20 mm and a thickness of 5.2 mm wide indentation
1 cm and 2 cm with variations in parallel and not parallel, For comparison
reinforcing steel with a diameter of 8 mm plain, Reinforcement the park in the
center of the cylinder as deep as 250 mm concrete,
Pull out of the test results obtained by varying loads are then tested statistical
normality and the average yield spread of the normal and evenly, With ANOVA
test found the average ratio of the different steel bamboo and bamboo for bamboo
has the same averrage, Strong bonding values mean concrete with reinforcement
bamboo wulung U-type notch distance of 100 mm wide parallel notches 10 mm
by 0.130 MPa and values mean strong bonding of concrete with reinforcement
bamboo wulung U-type notch distance of 100 mm wide parallel notches 20 mm
of 0.136 MPa, The mean value of strong bonding with reinforced concrete U-type
bamboo wulung notch distance of 100 mm is not parallel notches 10 mm wide by
0.054 MPa and a mean value of the strong bonding of concrete with
reinforcement bamboo wulung U-type notch distance of 100 mm is not parallel
notches 20 mm wide by 0.122 MPa, Strong bonding values mean concrete with
steel reinforcement amounting to 0.548 MPa, From the above data it can be
deduced that the average value of the strong bonding of concrete with
reinforcement of bamboo wulung is parallel notches 0.248 times of the value of
strong bonding plain steel reinforcement diameter of 8 mm with presentation 24,8
%. the average value of the strong bonding of concrete with reinforcement of
bamboo wulung is not parallel notches 0.248 times of the value of strong bonding
plain steel reinforcement diameter of 8 mm with presentation 24,8 %.
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Key Word: bamboo wulung. Steel.commit
Concrete.
Notch. Bond strength,
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