EFFECTS OF CYCLIC LOADIMG SPEED ON LIQUEFACTION RESISTANCE OF ASPHALT EMULSION STABLE TREATED BASE COURSE MATERIAL

Abstract

 In order to investigate effects of cyclic loading speed on influence to the cyclic shear deformation and the liquefaction strength of asphalt emulsion stable treated base course material, a series of undrained cyclic triaxial tests were performed applying cyclic loads with 3 types of loading frequencies. From the results, as the loading speed increased, the decrease in effective stress and the development of axial strain tended to be suppressed. In addition, comparing the increment of liquefaction strength R_L20 at cyclic loading frequencies 0.0031Hz and 0.2000Hz, the increment of iquefaction strength R_L20 was 0.05 when the asphalt emulsion addition amount was 5%, whereas the aspalt emulsion addion amount was 20%, it was 0.31. The result was that as the amount of asphalt emulsion added increased, the liquefaction strength R_L20 increased significantly with the increase the cyclic loading speed (loading frequency).