In a cement concrete pavement, warping stresses are mainly caused by:
Correct answer: B. A difference in temperature between the top and bottom surfaces
- A. The chemical reaction between bitumen and aggregate
- B. A difference in temperature between the top and bottom surfaces
- C. The impact of vehicles at expansion joints
- D. The unequal spacing of railway sleepers
Explanation
Temperature differences through the slab depth cause the concrete pavement to curl or warp, producing warping stresses. These stresses are distinct from load stresses caused directly by wheel loads.
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About Transportation Engineering
Transportation engineering covers highway planning and alignment, traffic studies, road geometric design, pavement materials and flexible or rigid pavement construction. It also includes railway, airport and traffic engineering concepts such as sight distance, superelevation, signals, capacity and level of service, distinguishing pavement failure from poor geometric design.
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