Question

What will be the CBR value of the soil if the pressure carried by the CBR specimen corresponding to 2.5 mm penetration is 1.5 MPa?

• A. 19.6%
• B. 17.8%
• C. 23.4%
• D. 21.8%

Answer 1

The correct option is D 21.8%

Standard pressure for 2.5 mm penetration,
$=70kg/c{m}^2$
$\therefore \text{CBR}=\frac{1.5N/m{m}^2}{\frac{70\times 9.81}{100}\frac{N}{m{m}^2}}\times 100$
$=21.84\%$