Study On Properties Of Asphalt Pavement Permeable Base

A large number of traffic surveys and studies have shown that the early damages of semi-rigid asphalt pavement are mostly related to the water damage, in which the water damage of infiltration of surface structure is particularly serious. Domestic and international studies have confirmed that setting the open-graded Asphalt Treated Permeable Base in the asphalt pavement structure layer can quickly rule out free water that penetrate the structure layer, thus improving the working environment of asphalt pavement, reducing water damage, as well slowing down the upward development of reflective crack in the semi-rigid base.Combining the climate features of Heilongjiang Province, this paper has studied the mixture design method of ATPB through a large number of laboratory tests. Through the asphalt pavement performance studies (including water stability, water permeability, mechanical properties, low temperature crack resistance, frozen stability etc.), this paper has also tested the mixture composition design and analyzed the relationship between mixture porosity, asphalt content and the various performance indicators. Through the drainage layer pavement structure calculation and analysis applying the theory of elastic layered system, the paper has studied the impacts of layer bit set of the drainage layer, and the compression modulus, thickness and other parameters, and the nature of semi-rigid material on the design of pavement structure.Relying on the test road built on the Shangzhi-Yabuli section of Sui Man Road, the paper has researched the layout of pavement internal drainage system. Through on-site tests and observations of the test road, the paper has verified the correctness of Laboratory Research.