Study on fatigue crack of asphalt overlay on old cement pavement
ZHANG Tao1, LI Dong-xing2
1.Hebei Vocational College of Rail Transportation, 050000, Shijiazhuang, China; 2.Shijiazhuang Zhongtian Engineering Construction Supervision Co., Ltd., 050000, Shijiazhuang, China
Abstract：
Asphalt layer has been widely used in the transformation of old cement concrete pavement, this paper analyzes the cracking performance of asphalt overlay on the old cement pavement from the experimental point of view. The results show that the semi logarithmic curve can be used to fit the relationship of shear strain and shear strain. When the shear strain is 1 500 times, the shear strain is approximately linear. The difference of wheel load and deflection is linear. The increase of the axial load is increasing. The results of this paper can provide reference for the fatigue cracking of asphalt overlay on old cement pavement.
