Hojjat HOSSEİNNEZHAD, Erdoğan TOSUN, Özge ÇAKIR, Kambiz RAMYAR

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

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 (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 (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,

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Natural and Applied Sciences Journal-Cover

ISSN: 2645-9000
Başlangıç: 2018
Yayıncı: İzmir Demokrasi Üniversitesi

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