Large-Scale Direct Shear Testing of Recycled Construction and Demolition Materials

Abstract

Laboratory large-scale direct shear tests were carried out on five different recycled construction and demolition materials, such as crushed concrete (CC), crushed rock (CR), crushed brick (CB), reclaimed asphalt pavement (RAP), and recycled glass (RG). The shear strength parameters were evaluated with a large shear test machine for different values of normal stress ranging from 30 to 200 kPa. Resulting values of cohesion were found to vary in a wide range between 8.55 kPa to 284.5 kPa, whereas coefficient of internal friction varies between 44.6° to 52.1°. The failure envelopes for all materials investigated are straight-line failure envelopes. Crushed rock and crushed concrete showed high ..