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  1. A Marshall specimen is prepared for bituminous concrete with a bitumen content of 5 percent by measured unit weights of the mix are 2.442 g/cm3 and 2.345 g/cm3 , respectively. The bitumen has a specific gravity of 1.02. The percent voids in mineral aggregate filled with bitumen (VFB) are
    1. 34.55
    2. 35.9
    3. 73.55
    4. 74.3
Correct Option: C

Gt = 2.442 g/cm2
Gm = 2.345 g/cm2

% air voids (Va) =
Vol. of air
= 1.917
Total volume

=
Gt - G
× 100
C1

=
2.442 - 2.35
× 100 = 4.1369
2.345

Vol of bitumen ,Vb = Gm ×
Wb
Gb

=
2.345 × 0.05
= 11.49%
1.02

% voids filled by bitumen
=
0.11495
= 73.536%
0.11495 + 0.04



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