Study On The Properties Of Steel Fiber Asphalt Mixture And Its Applicatiion

With the increase of traffic and tracks of overload axle, early breakage in the asphalt concrete pavements takes place often. To prolong the life of asphalt concrete pavements, the steel fiber asphalt concrete is studied in the thesis.In the thesis, it is researched that the mechanic properties of steel fiber asphalt concrete and the stabilities character of steel fiber asphalt concrete under low and high temperature condition in laboratory. The optimal ratio of steel fiber is about 2%～3% is given in thesis. The fatigue life of steel fiber asphalt concrete at 15℃is investigated with MTS, it is proofed that the fatigue of steel fiber asphalt concrete is 2.6 times than un-reinforced asphalts concrete. Based on the results of laboratory test, the steel fiber asphalt concrete field pavement is built in Chongqing Wu-Gui highway to determine the construction arts and rust prevention method of steel fiber and actual application effects of steel fiber asphalt concrete, the results of application show that the construction art of steel fiber asphalt pavement concrete is the same as the common asphalt concrete, and has the better technology properties, and the asphalt can play anti-rust role in the mixture.The result of laboratory test and field application show that the steel fiber asphalt concrete pavement has the good properties, and its construction art is same as the common asphalt concrete, especially its longer fatigue life can reduced the thickness of pavement structure, as a results, the steel fiber asphalt concrete as a new pavement material is a cheap pavement material in the long run.