Question 1 |
As per IRC:37-2012, in order to control subgrade rutting in flexible pavements, the parameter to be considered is
horizontal tensile strain at the bottom of bituminous layer | |
vertical compressive strain on top of subgrade | |
vertical compressive stress on top of granular layer | |
vertical deflection at the surface of the pavement |
Question 1 Explanation:
As per \mathrm{IRC}: 37-2012
N=4.1656 \times 10^{-0.08}\left[\frac{1}{\epsilon_{V}}\right]^{4.5337}
N=1.41 \times 10^{-8}\left[\frac{1}{\epsilon_{v}}\right]^{4.5337}
where N= No. of cumulative standard axle
\epsilon_{v}= Vertical strain in the subgrade
N=4.1656 \times 10^{-0.08}\left[\frac{1}{\epsilon_{V}}\right]^{4.5337}
N=1.41 \times 10^{-8}\left[\frac{1}{\epsilon_{v}}\right]^{4.5337}
where N= No. of cumulative standard axle
\epsilon_{v}= Vertical strain in the subgrade
Question 2 |
Road roughness is measured using
Benkelman beam | |
Bump integrator | |
Dynamic cone penetrometer | |
Falling weight deflectometer |
There are 2 questions to complete.