Research On The Asphalt Concrete Pavement Damage Based On Different Soaking Status

Asphalt concrete pavement is widely used in urban roads,with its advantages of Smooth less dust, shock absorption, noise reduction, good sliding resistance and convenient maintenance,etc. Also widely used in asphalt concrete roads, their problems are more and more exposed. Asphalt concrete pavement prone to the phenomenon of damage Such as crack, loose, pit slot, rutting and so on, Influenced by rainfall, temperature,ultraviolet irradiation and other environment and climate conditions,rapid growth of traffic and other factors,which leads to reducing the performance of the pavement and shortening the service life. Especially the water environment has a great influence on asphalt concrete pavement damage.Therefore, the research of asphalt concrete pavement damage modes, damage mechanism and influence factors especially the factors of water environment has extremely important significance on asphalt concrete road engineering.In this paper, we study different soaking status on the extent of the damage of asphalt concrete pavement and its influence factors. Through the pavement disease research, found that the road diseases are common, and the water damage is one of the most important forms of damage, and the dry-wet circulation is important condition of pavement damage.Thus the indoor simulation test is designed. By Marshall stability and mass loss rate test, analysis stability of road under different conditions and the forms of damage, and explore the effect of micro-surfacing to on improving the stability of the asphalt concrete under different soaking status. Tests showed that the size of the soaking status influence on pavement damage is full of water,dry-wet circulation and without water from large to small in turn. The forms of damage is different on the different soaking status,it is mainly for map cracking due to wear and loss of fine aggregate when dry-wet circulation, pit slot due to damage to the pavement structure by pore water pressure when full of water; micro-surfacing can effectively reduce the phenomenon of water damage of asphalt concrete pavement,and the promotion effect to stability on dry-wet circulation is the best.