Research Comparison Compressive Strength of Concrete
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Table 5.14 Modulus of Elasticity Test
Concrete Area
Ao Average of
Area Po
Maximum load
Average of Compression Average
Average of strain
E cm
2
kgf Mpa
Mpa Mpa
25:5 172.5683
172.5683 21.34
725 0.2131
0.2001 0.0659
3.234 171.1738
20.91 675
0.2115 0.0786
2.691 170.7103
21.04 625
0.1867 0.0698
2.675 50:5
171.6380 171.6380
20.41 625
0.1857 0.1636
0.0719 2.583
172.5683 21.34
500 0.1491
0.0643 2.319
172.8013 20.91
525 0.1560
0.0705 2.213
75:5 172.5683
172.5683 20.32
150 0.0497
0.0673 0.0552
0.900 171.8704
20.93 275
0.0885 0.0714
1.239 172.8013
20.92 200
0.0638 0.0495
1.289
Table 5.15 Average of Modulus of Elasticity Test
Modulus of Elasticity Average Modulus of Elasticity
Mpa Mpa
3.234 2,866
2.691 2.675
2.583 2.371
2.319 2.213
0.900 1.143
1.239 1.289
From the result, the highest maximum load is in the mixture with the proportion of metakaolin and silica fume; 25 : 5. The value of compression
strength test is 0.2131 MPa with the value of strain is 0.0659 and the value of
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modulus of elasticity is 3.234 MPa. The highest value of strain is in the proportion of metakaolin and silica fume; 50:5. The value is 0.0719 and the value
of modulus elasticity is 2.583 MPa. The highest value of modulus of elasticity is in the proportion of metakaolin and silica fume; 25 : 5. The value is 3.234
MPa. Based on modulus of elasticity test that has been done, the value of the
average of modulus of elasticity at 28 days with comparative precursor are metakaolin and silica fume are 25 :5 = 2.866 MPa, 50 :5 = 2.371MPa,
75 : 5 = 1.143 MPa. The modulus of elasticity chart can be seen in Figure 5.6.
Figure 5.6 Modulus of Elasticity Chart
0,000 0,500
1,000 1,500
2,000 2,500
3,000 3,500
25:5 50:5
75:5 M
o d
u lu
s o
f E
la st
ic it
y V
a lu
e M
P a
Percentage of Metakaolin and Silica Fume
72