Comparative Investigation of the effect of recycled fine aggregate from new and old construction wastes in C-25 concrete, in Ethiopia

Mukaddes Darwish, Lucy Feleke Nigussie, Tewodros Ghebrab

Research output: Contribution to journalArticlepeer-review

Abstract

Wherever there are construction activities, there is waste generation. In Ethiopia, the popular material for wall construction is a hollow concrete block that can be broken on the production site or the construction site during loading and unloading and is also found abundantly in demolished buildings. This research aimed at searching for alternative construction materials through recycling and examined the properties of recycled fine aggregate from demolished (old) and construction (new) hollow concrete block (HCB) wastes. The study examined the effect of the recycled HCB on fresh and hardened C-25 concrete properties and the possible replacement percentage of river sand by those recycled fine aggregates. The research also examined the comparative properties of the two recycled fine aggregates. The replacement percentage was in steps of 25%, starting from 25% up to 100%, and 0% represented the reference mix. In general, the recycled fine aggregate exhibited relatively lower physical
Original languageEnglish
JournalSustainability
StatePublished - Dec 12 2019

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