Durability RESULT AND DISCUSSION

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4.3 Durability

In terms of durability, the result of durability is presented through the result of Density is presented in Table 4.17. The formula of density can be seen at formula 2.14. Density = Water Inside Sample of Weight - Sample of e Dry Surfac of Weight Crush After Sample of Weight Density of Crumb Rubber 0 Density Sample A = 502 1233 = 2.46 Grcm 3 Density Sample B = 509 1233 = 2.42 Grcm 3 Density Sample C = 509 1237 = 2.43 Grcm 3 Average of Density = 3 43 . 2 42 . 2 46 . 2   = 2.44 Grcm 3 Density of Crumb Rubber 3 Density Sample A = 490 1243 = 2.54 Grcm 3 Density Sample B = 504 1247 = 2.47 Grcm 3 Density Sample C = 513 1244 = 2.42 Grcm 3 Average of Density = 3 42 . 2 47 . 2 54 . 2   = 2.48 Grcm 3 Density of Crumb Rubber 4 Density Sample A = 516 1239 = 2.40 Grcm 3 Density Sample B = 477 1226 = 2.57 Grcm 3 Density Sample C = 478 1218 = 2.55 Grcm 3 commit to user 78 Average of Density = 3 55 . 2 57 . 2 40 . 2   = 2.51 Grcm 3 Density of Crumb Rubber 5 Density Sample A = 505 1240 = 2.46 Grcm 3 Density Sample B = 503 1220 = 2.43 Grcm 3 Density Sample C = 467 1237 = 2.65 Grcm 3 Average of Density = 3 65 . 2 43 . 2 46 . 2   = 2.51 Grcm 3 Table 4.17. Density Asphalt Content Density Grcm3 Density Grcm3 Density Grcm3 Density Grcm3 CR 0 CR 3 CR 4 CR 5 4,5 2,44 2,48 2,51 2,51 5,0 2,44 2,47 2,47 2,49 5,5 2,43 2,45 2,42 2,43 6,0 2,42 2,45 2,46 2,42 6,5 2,41 2,43 2,45 2,43 Specification - In terms of density, the result from the average of density of sample A, B and C. The detail calculation sample for 4.5 asphalt content for 0 crumb rubber is as follow: Based on Table 4.17, it can be seen that the score of Density was not stable because the added of Crumb Rubber did not influence Density score significantly. Moreover, the added of Asphalt Content in the mixture also did not influence the score of Density. The description of Density will be presented in Figure 4.38. Moreover, Figure 4.38 will present the score of density for all of crumb rubber added in experiment. commit to user 79 Figure 4.38. Density Test Based on Figure 4.38, it can be seen that the highest score of crumb rubber 4 and 5 with 4.5 asphalt content, then the score of density were decrease inline with the added of asphalt content. Based on the result it can be seen that the added of crumb rubber and asphalt content influenced the score of density.

4.4 Discussion