Durability aspects of recycled aggregate mortar mixtures
Ali Mardani-Aghabaglou1, Ahsanollah Beglarigale2, Halit Yaz2, Kambiz Ramyar1
1- Department of Civil Engineering, Ege University, Bornova-Izmir, Turkey
2- Department of Civil Engineering, Dokuz Eylul University, Buca-Izmir, Turkey
Corresponding Author’s E-mail :kambiz.ramyar@gmail.com
Abstract
In this study the effects of recycled glass and recycled concrete fine aggregates on the compressive
strength, water absorption, chloride-ion penetration, freeze-thaw and sulfate resistance as well as ASR
expansion of mortar mixtures were investigated comparatively. For this purpose, 9 different mortar
mixtures were prepared by replacing 25, 50, 75 and 100 wt% of crushed-limestone fine aggregate with
recycled aggregates. Test results demonstrated that, compared to the control mixture, compressive
strength of the mortar mixture decreased with increasing the recycled aggregate replacement level. The
transport properties of recycled concrete aggregate-containing mixture were lower than those of the other
two series. Frost resistance of mortar mixture improved by using both of the recycled aggregates. ASR
expansion increased with increasing recycled glass aggregate replacement level. Mortar mixtures
containing more than 50% recycled concrete aggregate showed higher sulfate resistance than the control
mixture. This was attributed to the accumulation of ettringite in pores of the RC aggregate resulting in
lower expansion
.
Keywords: Compressive strength, transport properties, freeze-thaw resistance, sulfate resistance,
ASR expansion.
Durability aspects of recycled aggregate mortar mixtures