Shear fatigue performance of epoxy emulsified asphalt tack coat
1.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064, China; 2.Xuchang Huajie Highway Survey and Design Co., Ltd., Xuchang, Henan 461000, China
Abstract：Using stress control mode, half sine wave vector load waveform, 10 Hz load frequency and 01 cycle characteristic value, with shear fracture as fatigue failure criteria, 45° inclined shear fatigue test was conducted at constant 60 ℃ on MTS810 material test machine with stress level of 02～07. Epoxy emulsified asphalt tack coat shear fatigue performance of asphalt pavement and bridge deck pavement was investigated with optimum formula and spread quantity, and the shear fatigue life regression equation was established． The results indicate that stress level has significant influence on fatigue life. The decreasing rates of fatigue life of epoxy emulsified asphalt tack coat of asphalt pavement and bridge deck pavement are respectively 974％ and 993％ with the increasing of stress level from 02 to 07 under 60 ℃. The regression equations of fatigue life logarithmic and shear stress have high accuracy, and the shear fatigue life of bridge deck pavement structure is more sensitive to shear stress than that of asphalt pavement.
2016, Vol. 37 
