The construction industry is under a lot of environmental pressure owing to the large amount of construction and demolition waste produced in a year. The study examines the possibility of the Recycled Concrete Aggregate (RCA) being used in its entirety to replace natural coarse aggregate in concrete paver blocks. The comparison was taken of the properties of RCA and natural aggregates, i.e. Aggregate Impact Value (AIV), Aggregate Crushing Value (ACV), specific gravity, water absorption and compressive strength of the manufactured M30-grade paver blocks through extensive laboratory tests. The findings show that RCA exhibited lower AIV (12.67% vs. 13.34%) and ACV (13.40% vs. 14.58%) values than natural aggregate, indicating better resistance to impact and crushing forces respectively. The compressive strength of 100% RCA paver blocks had an average value of 28 days of 34.59 N/mm2, which is relatively similar to that of natural aggregate blocks (33.84 N/mm2). The research has come to the conclusion that RCA is a technically feasible and environmentally friendly material, when properly processed and mixed, as a non-structural concrete component, such as paver blocks, and contributes to waste reduction and the objectives of the circular economy in the construction industry.
Khan et al. (Thu,) studied this question.