Laboratory study on the performance of recycled concrete aggregates blended with reclaimed asphalt pavement as pavement granular material

摘要

Production of recycled concrete aggregates (RCA) from construction and demolition (C&D) waste has becomeudpopular all over the world since the availability of land spaces are limited to dispose. Therefore it is important toudseek alternative applications for RCA. The use of RCA in base and sub-base layers in granular pavement is audviable solution. In mechanistic pavement design, rutting (permanent deformation) is considered as the majorudfailure mechanisms of the pavement. The rutting is the accumulation of permanent deformation of pavementudlayers caused by the repetitive vehicle load. In Queensland, Australia, it is accepted to have the maximum ofud20% of reclaimed asphalt pavement (RAP) in RCA and therefore, it is important to investigate the effect of RAPudon the permanent deformation properties of RCA. In this study, a series of repeated load triaxial (RLT) testsudwere conducted on RCA blended with different percentage of RAP to investigate the permanent deformation andudresilient modulus properties of RCA. The vertical deformation and resilient modulus values were used touddetermine the response of RCA for the cyclic loading under standard pressure and loading conditions.