Page 65 - Unit 2: Pavement Material

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

Exercise EXERCISE 2 : Answer

• Determine the optimum bitumen content for the ACB 28 mix given below.

2.345 8.5
7.5
Density (Mg/cu.m) 2.335 % Air Voids in Total Mix (VIM) 6.5
2.340

5.5
2.330
4.5
2.325
2.320 3.5
2.5
2.315
3.5 4.0 4.5 5.0 5.5 6.0 6.5 3.5 4.0 4.5 5.0 5.5 6.0 6.5
% Bitumen Content % Bitumen Content
1400 80.0

1350 75.0
Stability (kg) 1300 % Voids filled Bitumen (VFB) 70.0

1250
65.0
1200
60.0
1150 55.0

1100 50.0
3.5 4.0 4.5 5.0 5.5 6.0 6.5
3.5 4.0 4.5 5.0 5.5 6.0 6.5
% Bitumen Content
4.00 % Bitumen Content

The OBC = 5.00 + 5.10 + 5.00 + 5.30 + 4.50
Flow (mm) 5
3.50
= 4.98 %
3.00

2.50  HOME
3.5 4.0 4.5 5.0 5.5 6.0 6.5
Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my

% Bitumen Content