GATE (CE) : Transportation Engineering & Surveying #4

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Question 1

Read the following statements carefully
Statement I: The most widely used test for design of rigid pavements is the California Bearing Ratio (CBR) test.
Statement II: CBR test can be used for evaluating soil strength properties such as cohesion and internal friction.
Choose the correct option

• AStatement I is true and Statement II is false
• BStatement I is false and Statement II is true
• CBoth Statement are true
• DBoth Statement are false

Question 2

The rigid pavement are made of

• ABituminous binder
• BWBM
• CTar
• DPCC or RCC

Question 3

For a 25cm thick cement concrete pavement, analysis of stresses gives the following values

The most critical stress value for this pavement is

• A40 kg/cm²
• B42 kg/cm²
• C44 kg/cm²
• D45 kg/cm²

Question 4

Consider the following statements in the context of cement concrete pavements.
I: Warping stresses in cement concrete pavements are caused by the seasonal variation in temperature
II: Tie bars are generally provided across transverse joints of cement concrete pavements
The correct option evaluating the above statement is

• AI : True II : False
• BI : False II : True
• CI : True II : True
• DI : False II : False

Question 5

In a pavement slab of thickness 18 cm the modulus of elasticity of concrete and Poisson's ratio are 3 x 10⁵ kg/cm² and 0.15 respectively. Plate bearing test shown the pressure of 1.2 kg/cm² corresponding to 1.25 mm penetration. What is the radius (in cm) of relative stiffness of pavement slab?

• A250
• B78
• C125
• D63

Question 6

The width of the expansion joint is 20mm in a cement concrete pavement. The laying temperature is 20 °C and the maximum slab temperature in summer is 60 °C. The coefficient of thermal expansion of concrete is 10 x 10^–6 mm/mm / °C and the joint filler compresses upto 50% of the thickness. The spacing between expansion joints should be

• A20m
• B25m
• C30m
• D40m

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