Use of tile waste as an internal curing aggregate (ICA) to replace coarse aggregates in roller compacted concrete (RCC) production

Abstract

Roller-compacted concrete (RCC) is gaining popularity, offering economic benefits and enhanced performance in various construction applications. However, traditional RCC production methods face challenges related to curing, which can affect concrete properties and long-term durability. This study investigates an innovative approach to RCC production by utilizing tile waste as an Internal Curing Aggregate (ICA) to replace coarse aggregates. The primary aim is to develop an RCC with improved performance compared to existing methods while exploring the potential for enhancing hydration and achieving higher strength results with minimum cement content. The research focuses on evaluating the suitability of clay tile waste as an ICA and examines the mechanical and durability properties of RCC samples containing clay tile aggregates (CTA) at varying replacement percentages (2.5%, 5%, and 7.5%). Results indicate that a 2.5% replacement of coarse aggregates with clay tile waste enhances early compressive and flexural strength development, with tensile strength comparable to control samples. However, diminishing trends in compressive, flexural, and tensile strength are observed beyond this ratio, attributed to the lower inherent strength of CTA. This advances sustainable concrete production and provides insights for optimizing RCC mix designs for improved performance and durability.