Abstract：Currently, recycled aggregate concrete (RAC) made of recycled coarse aggregate (RCA) has been proved technically and practically feasible in structural engineering and eases the demand for natural coarse aggregate to some extent. However, the recycled fine aggregate (RFA), which accounts for about 40-60% of total recycled aggregates, cannot be efficiently used, resulting in the unsettled problem of wasting resources and the lack of natural sand for construction. A literature overview on the material properties and structural behaviors of RFA concrete is presented in this paper, aiming to find the laws of the characteristics of RFA concrete including the workability, mechanical properties and structural behaviors, to point out the trend of future research, and to provide theoretical basis for application of RFA concrete in structural engineering. It is found that the micro cracks within RFA will lead to the complexity of RFA concrete properties. The workability and mechanical property of RFA concrete are inferior to those of natural aggregate concrete (NAC). However, they can be compensated by adjusting water to cement ratio and the dosage of superplasticizer. Compared to NAC with identical compressive strength grade, RFA concrete owns low splitting tension strength and elastic modulus. Although the bearing capacities of normal section for RFA concrete elements and NAC elements are similar, the shear performance and bonding between them and reinforcements should be further studied.
王春晖 肖建庄. 再生细骨料混凝土材料性能与结构行为研究评述[J]. 土木工程学报, 2022, 55(5): 37-53.
Wang Chunhui Xiao Jianzhuang. Material properties and structural behaviors of recycled fine aggregate concrete: an overview. 土木工程学报, 2022, 55(5): 37-53.
