What is the recommended thickness of bituminous concrete surface course in the overlay design?
What is the recommended thickness of bituminous concrete surface course in the overlay design? Correct Answer Minimum 40 mm
The recommended thickness of the bituminous concrete surface layer in the overlay design is a minimum of 40 mm. This can be obtained in clause 7.5 of IRC 81:1997. The minimum thickness of 50 mm is required for the bituminous macadam overlay with an additional minimum 40 mm BC or 50 mm DBM surfacing course.
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Feb 20, 2025