65 Based on Table 4.11, the score of VIM was lower inline with the added of Crumb Rubber.
Then, the added of Asphalt Content also decreased the score of VIM. As we can see on formula 2.5
Based on Bina Marga 2010 the score of VIM test should be on 3.5 to 5. Therefore, the score of VIM that did not meet the requirement were CR 0 with 4.5 and 5.0 Asphalt
Content; CR4 with 5.5, 6 and 6.5 Asphalt Content; CR 5 with 4.5. Then, Figure 4.32 will present about VIM test of crumb rubber added and several asphalt
content level.
Figure 4.32. VIM Test
Based on the Figure 4.32, it can be seen that the crumb rubber added of 0 showed the highest score for VIM test on 4.5 of asphalt content, then the second place was come from
4 of crumb rubber content. On the other hand, the lowest result of VIM test was come from 3 of crumb rubber.
4.2.5 Marshall Quotient MQ
In terms of Marshall Quotient, the result was obtained from the average of Marshall Quotient of sample A, B and , and the calculation can be conducted as mentioned in formula 2.6. The
detail sample calculation for 4.5 asphalt content for 0 crumb rubber is as follow: Marshall Quotient Sample A = stabilityflow = 1343.513.30 = 407.12 Kgmm
1 2
3 4
5 6
7
4,5 5
5,5 6
6,5 VIM
Asphalt Content
3 4
5 min 3.5-5
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66 Marshall Quotient Sample B = stabilityflow = 1165.013.20 = 364.06 Kgmm
Marshall Quotient Sample C = stabilityflow = 1456.933.10 = 469.98 Kgmm Average of Marshall Quotient = 407.12+364.06+469.98 : 3 = 413.72 Kgmm
Marshall Quotient for Crumb Rubber 3 Marshall Quotient Sample A = stabilityflow =793.864 = 198.46 Kgmm
Marshall Quotient Sample B = stabilityflow = 1055.524.10 = 257.44 Kgmm Marshall Quotient Sample C = stabilityflow = 1140.074.20 = 271.45 Kgmm
Average of Marshall Quotient = 198.46+257.44+271.45 : 3 = 242.45 Kgmm Marshall Quotient for Crumb Rubber 4
Marshall Quotient Sample A = stabilityflow = 947.063.40 = 278.55 Kgmm Marshall Quotient Sample B = stabilityflow = 900.244.30 = 209.36 Kgmm
Marshall Quotient Sample C = stabilityflow = 1226.413.20 = 383.25 Kgmm Average of Marshall Quotient = 278.55+209.36+383.25 : 3 = 290.39 Kgmm
Marshall Quotient for Crumb Rubber 5 Marshall Quotient Sample A = stabilityflow = 849.573.90 = 217.84 Kgmm
Marshall Quotient Sample B = stabilityflow = 610.443.10 = 196.92 Kgmm Marshall Quotient Sample C = stabilityflow = 693.663.20 = 216.77 Kgmm
Average of Marshall Quotient = 217.84+196.92+216.77 : 3 = 210.51 Kgmm perpustakaan.uns.ac.id
commit to user
67 The result of Marshall Quotient MQ is presented in Table 4.12.
Table 4.12.Marshall Quotient MQ
Asphalt Content MQ Kgmm
MQKgmm MQ Kgmm MQ Kgmm
CR 0 CR 3
CR 4 CR 5
4,5 413,72
242,45 290,39
210,51 5,0
426,69 322,55
357,19 243,35
5,5 527,73
285,06 323,75
262,07 6,0
450,77 259,25
247,78 255,62
6,5 392,38
209,35 244,05
184,10 Specification
min 250 min 250
min250 min 250
Based on Table 4.12, it can be seen that the result of Marshall Quotient were not stable. The added of Crumb Rubber was not always decreased or increased the score of MQ. Moreover,
not all of the MQ result meet Bina Marga 2010 requirement because many of the results of MQ were under 250 Kgmm. As we can see on formula 2.6
The used of Crumb Rubber 0 has the higher score of MQ than other mixtures because all of the Asphalt Mixture percentages could meet the requirement of Bina Marga 2010. The
result of MQ is presented in Figure 4.33.
Figure 4.33. MQ Test
Based on Figure 4.33, it can be seen that the added of crumb rubber would decrease the score of MQ. It was proven with the highest score of MQ was come from 0 crumb rubber, then
the added of crumb rubber until 5 showed lowest score of MQ.
100 200
300 400
500 600
4,5 5
5,5 6
6,5 M
Q K
g m
m
Asphalt Content
3 4
5
min 250 Kgmm
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68
4.2.6 Void in Mineral Aggregate VMA
