Recycled Clay Masonry and Recycled Concrete Aggregate Blends in Pavement

摘要

This paper presents the engineering characteristics of blends of recycled crushed clay masonry (RCM) with recycled concrete aggregate (RCA). The proportion by dry mass of RCM was 10%, 20% and 30% of the total mass. Results are reported of standard engineering classification tests, and static and repeated loading triaxial tests (RLTT) conducted by the second author. Matric suctions were determined by filter paper method to study the influence of suction on strength and to establish Soil Water Characteristic Curves (SWCC). Triaxial and RLTT specimens were tested between 60% and 100% of Optimum Moisture Content (OMC) and at constant dry density ratio. Cohesion varied between 0 and 187 kPa and was dependent on moulding moisture content, matric suction, and the material source. As initial moisture content increased, resilient modulus decreased, generally, and permanent strain increased. Resilient modulus decreased also as the crushed masonry content increased.