GATE CE 2017 Set 2 — Question 54
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Transportation Engineering → Pavement Design → Rigid Pavement Factors
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Question
The radii of relative stiffness of the rigid pavements P and Q are denoted by and , respectively. The geometric and material properties of the concrete slab and underlying soil are given below:
The ratio (up to one decimal place) of is __________.
| Pavement | Concrete: Length of Slab | Concrete: Breadth of Slab | Concrete: Thickness of Slab | Concrete: Modulus of Elasticity | Concrete: Poisson's Ratio | Soil: Subgrade Reaction Modulus |
|---|---|---|---|---|---|---|
| P | ||||||
| Q |
Correct answer
1.9 to 2.1
Solution
The radius of relative stiffness () is given by the formula:For Pavement P:For Pavement Q:Therefore, the ratio is:
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