Question

A cement concrete pavement is designed using Westergaard's equations with following data :

Wheel load = 4100 kg
Modulus of elasticity of cement concrete
$=3.3\times {10}^{5}kg/c{m}^2$
Pavements thickness = 18 cm
Poisson's ratio of concrete = 0.15
Modulus of subgrade reaction = 25kg/$c{m}^3$
Radius of contact area = 12 cm
What will be the radius of equivalent distribution of pressure ?

• A. 13.5 cm
• B. 11.4 cm
• C. 12 cm
• D. 10.8 cm

Answer 1

The correct option is B 11.4 cm

Radius of equivalent distribution of pressure,
$b=\sqrt{1.6a^2+h^2}-0.675h$

$=\sqrt{1.6\times {12}^2+{18}^2}-0.675\times 18=11.4cm$