Prediction of the elastic modulus and the splitting tensile strength of concrete incorporating both fine and coarse recycled aggregate

By Yuyin Wang, Huan Zhang, Y. Geng, Qinghe Wang, Sumei Zhang. Construction and Building Materials, 2019

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Abstract This study aims to develop models for the elastic modulus (Ec) and splitting tensile strength (ftsp) of recycled aggregate concrete (RAC) incorporating coarse recycled aggregate (CRA) and fine recycled aggregate (FRA). An experiment was performed on 15 groups of RAC, using one type of CRA and two types of FRAs. Meanwhile, CRA replacement ratios (rCRA) of 0, 50, and 100% were used, while for each rCRA, three replacement ratios of each FRA (0, 50, and 100%) were investigated. Furthermore, the slump value, compressive strength, Ec, and ftsp were tested and analyzed. Based on the results, new models accounting for the influence of recycled aggregate were developed and validated using a database of test data. The results showed that: (1) the influence of FRA on the tested properties is independent of the CRA content, (2) the proposed models can effectively predict the Ec and ftsp of RAC.

Subfields: Building and Construction, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/023e044825c7c170024a5aaae2d2196ff14b0dd6