Design and Construction of HMA Overlays on Rubblized PCC Pavements: State of the Practice

摘要: Rehabilitation of existing pavements is a top pavement priority facing local, state, and federal transportation agencies. The use hot-mix asphalt (HMA) overlays presents long-term economical solution to the rehabilitation problem. HMA restore rideability, improve functional performance as well increase structural capacity system. Due expense, time traffic delay involved in concrete restoration (CPR) reconstruction, resurfacing portland cement (PCC) with an overlay very appealing option for many However, existing, worn-out PCC present particular problem due likelihood reflection cracking when placed. must be addressed design phase if achieved. objective rubblization eliminate by total destruction slab action pavement. This process normally achieved rubblizing into fragments. Reinforcing steel, pavement, generally fully debonded from this approach. applicable all types pavements. paper provide overview current construction guidelines specific process. A procedure presented determining required thickness placed over rubblized slabs construction.