Abstract
In order to design a anti-sliding and durable asphalt mixture, we independently develop two sets of laboratory equipment: the Laser Contour Detector of Asphalt Pavement and the Accelerated Rub Tester, with which we collect the plate surface contour every two hours for 5 times in the first 8 hours in the rub test, and then we make contour curves and analyze the angular distribution statistics of surface contour and thus we propose characterizing the skid resistance performance and durability of the asphalt pavement based on the maximum peak of angular distribution rate, which has been proved to be reasonable. By designing different gradations of SMA-13 and GAC-13 asphalt mixture and using the maximum peak of angular distribution rate to evaluate the skid resistance performance of different degrees of kneading, the asphalt mixture with better skid resistance has been made. That provides a reference for engineering application. The laboratory research develops a method for designing a anti-sliding and durable asphalt mixture based on the maximum peak of angular distribution rate, which makes up for the defects of the current stage where there is no ways to test the skid resistance performance and durability while designing the asphalt mixture.
Highlights
Most Chinese highways use asphalt pavement whose skid resistance performance is directly related to the safety of road traffic, and the skid resistance performance is an important index of road function, the study on the skid resistance performance of asphalt pavement is very important
(3) Rub in the room combined with accelerated loading test machine, laser contour detector, forming a peak with maximum angular distribution rate Durable skid design of asphalt mixture method, make up this stage of asphalt mixture design phase does not validate its durability against sliding of defects
The result shows that the acute angle change is not obvious and the peak angle distribution ratio is small, and the obtuse angle would increase with kneading time going by, which means that the pavement profile angle is getting flat and its skid resistance performance is declining
Summary
Most Chinese highways use asphalt pavement whose skid resistance performance is directly related to the safety of road traffic, and the skid resistance performance is an important index of road function, the study on the skid resistance performance of asphalt pavement is very important. Focusing on the factors like different degrees of roughness and different kneading time, we use the road profile peak angle to study the skid resistance and durability of the asphalt pavement[8~11], aiming to establish related quantitative evaluation way to evaluate the skid resistance performance and durability of asphalt mixture and attempting to put forward new indexes to design the asphalt pavement with good skid resistance and durability. Focusing on the roughness of different road surface and different knead time and combining with the asphalt pavement laser detector and acceleration load knead machine, it established relevant quantitative evaluation method and attempted to put forward new indexes to evaluate skid resistance durability of the asphalt pavement. 2 Objective and scope of this study (1) Two sets of independent research and development laboratory equipment: First: Asphalt Pavement Laser contour detector, Second: Accelerated rub tester. (2) Proposed maximum peak angular distribution rate to characterize the asphalt pavement It skids durability. using the angular distribution of the maximum peak rate evaluation of skid resistance rub their different stages. (3) Rub in the room combined with accelerated loading test machine, laser contour detector, forming a peak with maximum angular distribution rate Durable skid design of asphalt mixture method, make up this stage of asphalt mixture design phase does not validate its durability against sliding of defects
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