Potential Use of Recycled Brick and Demolition Concrete Aggregates in the Self-Compacting Concrete

Abstract

This work aim to investigate the possibility of recycling waste materials, specifically brick aggregates (BA) and demolition concrete aggregates (DCA) in the formulation of self-compacting concrete (SCC), for this an experimental study was carried out to evaluates the fresh and hardened properties. A reference mixture composed entirely of natural aggregates (NASCC) was compared to six mixtures incorporating recycled brick aggregates (BASCC), recycled demolition concrete aggregate (DCASCC) and a combination of recycled brick and demolition concrete aggregates (BDASCC), as partial replacement of natural aggregates have been prepared. The fresh properties were assessed through slump flow, L-box, and sieve stability tests. Compressive and flexural strengths tests were conducted to evaluate the hardened properties. The results are very interesting, suggesting a possible use of brick aggregate and demolition concrete aggregate in formulation of SCC, and can lead to new concrete with satisfactory physical mechanical properties satisfying the criteria of self-compacting concrete.