CYCLIC MECHANICAL PROPERTIES OF SANDY SOILS BY MIXING RECYCLED ASPHALT PAVEMENT MATERIAL

Abstract

Reusing of recycled asphalt pavement material (RAP) as an engineering material for ground improvement is important for reducing construction or maintenance costs. Reusing of RAP for ground improvement and ground protection seems available for reduction of construction cost because there are muchstocks of RAP. In this study, it is indicated that the cyclic mechanical properties of the sandy soil improved by mixing RAP. In order to obtain the fundamental results for the effect of mixing RAP on the improvement of cyclic behavior, the series of cyclic undrained triaxial tests were conducted. From the test results, it is shown that the cyclic strength of sandy soil - RAP mixture was greater than the cyclic strength without RAP case. It is also shown that the accumulation speed of excess pore water pressure at sandy soil - RAP mixture is slower than that without RAP mixing. In addition, the mechanism for cyclic mechanical properties of sandy soil - RAP mixture is also suggested.