Authors : Aiman Abdullah Mohammed Alodaini, Ahmad Ruslan Mohd Ridzuan and Mohd Afiq Mohd Fauzi
Abstract: As Construction and Demolition (C&D) waste create environmental pollution, many studies have been conducted to seek the potential uses of the construction and demolition waste in particular, concrete waste. A visible solution to such problem is to recycle the concrete waste as aggregate to replace the natural aggregate in various applications. Furthermore, the use of RCA can potentially reduce the dependence of the concrete industry on natural aggregates, maintain the natural aggregate resources, reduce the amount of C&D waste that is disposed in landfills and consequently ensure C&D sustainability for the benefit of the industry and the national economy. However, the use of the RCA as a substitute for the natural aggregate in concrete applications is not conventional because of the differences between the properties of RCA and the natural aggregate which limited the utilization of RCA mostly to 20-30% of the total natural aggregate. Moving towards the fully utilization of the RCA in the concrete industry could lead to a situation much closer to that of sustainable development. This study provides introduction on current status of production of recycled concrete aggregate, reviews and analyses some of the most substantial research findings over the past few years regarding the material aspects. It also attempts to elucidate the approaches for the better performances, identifies the gaps in the existing knowledge and underlines the reasons why this promising technology has not become widely accepted by the industry.
Aiman Abdullah Mohammed Alodaini, Ahmad Ruslan Mohd Ridzuan and Mohd Afiq Mohd Fauzi, 2020. The Surface Treated Re-Cycled Concrete Aggregate and Its Influence on the Properties of High Performance Concrete: A Review. Journal of Engineering and Applied Sciences, 15: 2511-2521.