Pumping in a cement concrete pavement is best described as the:
Correct answer: B. Ejection of water and soil through joints under wheel loads
- A. Upward movement of bitumen through asphalt pores
- B. Ejection of water and soil through joints under wheel loads
- C. Expansion of concrete caused by high temperature
- D. Loss of aggregate caused by wind erosion
Explanation
Pumping occurs when repeated wheel loads force water and fine subgrade material through joints or cracks. It is commonly associated with inadequate drainage or weak support beneath a rigid pavement.
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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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