Whitetopping Cement Concrete Overlays on Bituminous Pavements

Dr. S. S. Seehra, Senior Principal Advisor, LEA Associates South Asia Pvt. Ltd., New Delhi, India. (Former Director - Grade Scientist & Head, Rigid Pavements Division, CSIR-Central Road Research Institute, New Delhi)

Concrete is a very durable and versatile material for the construction of roads and highways. Several highways, expressways, and city roads have been constructed with cement concrete in the recent past in India. Cement concrete roads offer advantages like a long life of more than 30 years, minimum maintenance, and 10-15% fuel saving for heavy vehicles. Cement concrete has been used for construction of new roads, highways and also for rehabilitation of existing distressed bituminous pavements.

Bituminous Pavement ProblemsBituminous Pavement Problems

Rutting and potholing of bituminous pavements is a real problem in a hot climate like India’s, with heavy truck loads operating under frequent start/stop conditions. Concrete overlay is commonly applied where rutting and potholing of bituminous pavements is a recurring problem. Concrete overlays offer the potential for extended service life, increased structural and functional capacity, reduced maintenance requirements, and lower life-cycle costs as compared to bituminous overlay alternatives.

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