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Benefits:
• Economic
Applications:
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Conventional
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Concrete Whitetopping Special Considerations for Badly Failed Areas
Areas of the existing asphalt parking lot that show excessive deterioration should be singled out for special treatment. If the failure is caused by heavy truck traffic, which is common around trash and pickup containers, the overlay in those areas should be specifically designed for the heavier traffic.
Concrete can be placed directly on rutted asphalt when the ruts are less than 2 inches deep. Potholes, however, should be filled with a well-compacted aggregate base material. In large areas with severe subgrade failure, the unsuitable material must be excavated and replaced. A thin layer of sand may be needed to prevent intrusion of the subgrade material into the base course. Before placing the overlay, the elevation of the new subgrade material should match the existing pavement grade.
Next >> Drainage and Grade Problems
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ConcreteAnswers for Architects, Engineers and Developers:
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