Abstract:
The goal of sustainable construction is to reduce the environmental impact of a constructed facility over its lifetime. Concrete is the main material used in construction in Oman. Therefore, it makes economic and environmental sense to use recycled materials in the making of new concrete for different applications. The objective of this study is to investigate the effects of using the crushed tiles (CT) as a coarse aggregate in the concrete mix. The general properties, such as the specific gravity, water absorption and water content, abrasion of the natural crushed aggregate and the CT aggregate were tested and compared with natural aggregate. Three different replacement percentages of CT aggregates (0%, 50% and 100%) were used in the concrete mix, in each replacement percentage; W/C and G/S were changed as a parametric study to investigate their effects on slump and compressive strength. Three beams casted with different crushed building waste material replacement contents varying from 0%, 50%, and 100%. All the beams are simply supported and subjected to one concentrated loads at mid-span of the beam. It has found that the plain cement concrete specimen has shown a typical crack propagation pattern which leaded into splitting of beam. The load carrying capacity were compared with theoretical values calculated using BS8110 (Design Manual). In general, the results confirm that increasing the W/C will cause to decrease the compressive strength of the concrete mix that with CT aggregate.
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