Question

A Bituminous mix has a theoretical specific gravity of 2.60. The Bitumen context is 8% by weight of mix and its specific gravity is 1.00. What is the specific gravity of combined aggregates

• A. 3.20
• B. 3.00
• C. 2.80
• D. 2.00

Answer 1

The correct option is B 3.00

$G_t={\frac{100}{\frac{W_b}{G_b}+(\frac{W_c}{G_c}+\frac{W_f}{G_f})}}_{}$

combined aggregate

$2.6=\frac{100}{\frac{8}{1}+\frac{92}{G_c}}$
$\because G_c=$ Specific gravity of combined aggregates

$G_c=\frac{92}{\frac{100}{2.6}-8}$

$G_c=3.02$