Characterization of Coarse Recycled Aggregates Produced from Concretes with Different Strength Levels

Authors : Hojjat HOSSEİNNEZHAD, Erdoğan TOSUN, Özge ÇAKIR, Kambiz RAMYAR

Pages : 38-46

Doi:10.38061/idunas.851831

View : 18 | Download : 9

Publication Date : 2022-06-30

Article Type : Research Paper

Abstract :With the acceleration of Urban Renewal Program, particularly in large cities of Turkey, the problem of finding land-fills and eliminating construction waste with the least environmental pollution necessitates its value-added recycling. However, the presence of adhered weak mortar layer, comprising 20-70% of recycled concrete aggregate insert ignore into journalissuearticles values(RCA);, limits the use of RCA or lowers its inclusion level in concrete mixtures. Within the scope of this study, limestone- and basalt-bearing RCA obtained from 6 different concrete mixtures with three different water/cement ratios insert ignore into journalissuearticles values(0.45, 0.60, 0.70); were prepared and their water absorption, specific gravity, dense and loose unit weight, flatness indices, Los Angeles degradation values were determined. The results showed that, increasing w/c ratio of the parent concrete increased water absorption of the resultant RCA. However, the specific gravity, unit weight, abrasion resistance and flakiness index of RCA were decreased by increasing w/c ratio of the parent concrete.
Keywords : recycled concrete aggregate, parent concrete strength level, water absorption, degradation resistance, flakiness index