ClACK AND SEAT OF pec - STATE OF THE ART DHT - 7 For tr ) an ' Only : Cll < Library
نویسنده
چکیده
No previous experience of eliminating reflective cracking of both joints and cracks in portland cement concrete pavements through bituminous concrete overlays has been completely successful. This led to the idea of breaking slabs into smaller pieces in order to control movement of the deteriorating PCC pavements under the overlays. In cracking and seating, the existing pavement is broken up into small pieces, approximately 18 inches to 36 inches in size in most cases, and then seated against the subgrade prior to overlaying. Research efforts have been pointed at determining: (1) the nominal size of breakage, (2) the amount of energy (or rOlling) required for seating, and (3) the optimum amount of bituminous concrete to be used in the overlay. The answers to each of these will vary from project to project.
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