Research on Engineering Properties of Subgrade Soil Using Mixtures of Reclaimed Asphalt Pavement
In order to investigate the engineering properties of subgrade soils using mixtures of reclaimed asphalt pavement,test specimens were fabricated with varying reclaimed asphalt pavement contents and moisture contents,reclaimed asphalt pavement contents is 0%,15%,30%,50%and 75%respectively,the moisture contents is 5.5%,6.1%,6.9%and 7.5%respectively.The variations in resilient modulus of these mixed subgrade soil specimens were examined under differing levels of lateral confinement stress,deviator stress,and total stress.The research results show that the resilient modulus of the mixed subgrade soil increases as lateral confinement stress,deviator stress and total stress escalate,with a relatively low sensitivity to lateral confinement stress observed.Moreover,the closer the moisture content of the mixed subgrade soil is to the optimal moisture level,the higher its resilient modulus becomes.Additionally,there is an approximately linear increase in the resilient modulus of the mixed subgrade soil as the reclaimed asphalt pavement content rises.Consequently,incorporating reclaimed asphalt pavement into subgrade soils can effectively enhance their load-bearing capacity.
NETL
NSTL
万方数据
