Investigation of Waste Clay Brick Powder as Supplementary Cementitious Material in Self-compacting Concrete

The disposal of construction waste has emerged as one of the most critical environmental concerns in recent years. The demolition of clay bricks in building structures generates a significant volume of waste. This waste clay brick material can be effectively utilized in powdered form as a supplementary cementitious material (SCM), due to its inherent pozzolanic activity, which allows it to interact with the hydration products of cement. In essence, the waste clay brick can be recycled and reused in the construction industry, especially in the concrete production. The present communication aims to investigate the effect of using waste clay brick as a supplementary cementitious material in the production of self-compacting concrete (SCC). In this study, SCC mixtures were produced with 10, 20, 30, 40, and 50% waste clay brick powder and class F fly ash as a replacement of cement, based on weight. Consequently, a series of tests were conducted in the fresh state, including slump flow and V-funnel tests, as well as assessments of compressive strength and freeze-thaw resistance. From the obtained results, it was concluded that the fresh state performance of waste clay brick-based SCC mixtures was lower than control SCC mixture and fly ash-based SCC mixtures. Additionally, the compressive strength of the waste brick powder-based SCC mixtures was found to be lower compared to the fly ash-based SCC mixtures. In addition, freeze–thaw resistance of the mixtures increased by increasing the substitution level of waste clay brick powder in SCC mixtures.