The use of thin synthetic fiber reinforced concrete (SFRC) overlay for resurfacing deteriorated asphalt pavements started in early 1990's and has seen rapid growth in recent years. It involves placing very thin concrete slabs (50 to 100 mm thick) on old asphalt pavement to form bonded (or partially bonded) composite pavements and has been generally referred to as ultra-thin whitetopping (UTW). The reduction of thickness is justified by the use of high quality concrete with relatively high strength, shorter joint spacing and bond between the concrete and existing asphalt pavement.
展开▼
