Field Evaluation of asphalts concrete pavement surface texture and skid characteristics

In this work, Macro-texture and micro-texture of asphalt concrete pavement surface have been investigated in the field using four different methods (the sand patch method, out flow time method, sand cone method and British portable tester). Two different grain sizes of sand have been utilized in conducting both of the sand patch and the sand cone methods while the microtexture was investigated using the British portable tester method at both dry and wet pavement surface conditions. The test results of the four methods were modeled and correlated to each other and the skid number was determined. It was concluded that such modeling could provide instant data in the field for pavement condition evaluation which may help in pavement maintenance management.