Shear strength characteristics of recycled asphalt pavement material
1. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212000, China; 2. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China
摘要 1. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212000, China; 2. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
Abstract：To investigate the shear strength characteristics of recycled asphalt pavement (RAP) material, the standard proctor compaction test was conducted to obtain the optimum water content and the maximum dry density of RAP samples. To analyze the effects of embankment height and temperature under construction in different seasons, a series of consolidated drained (CD) triaxial tests were performed on RAP specimens at different confining pressures and compaction temperatures. The results show that the crushed RAP material is comparable to wellgraded gravel soil, which indicates that RAP is good as embankment fill. Compaction temperatures and confining pressures have significant influence on the CD shear strength behavior of compacted RAP samples. At a given confining pressure, the CD shear strength is increased with the increasing of compaction temperature due to the decreased void ratio of compacted RAP. At a given compaction temperature, the initial tangent modulus and the CD shear strength are increased with the increasing of confining pressure. The cohesion of RAP is increased linearly with the increasing of compaction temperature, while the compaction temperature has slight effect on the internal friction angel.
2018, Vol. 39 
