Li, Le L ORCID: https://orcid.org/0000-0003-4600-2100, Zhang, B ORCID: https://orcid.org/0000-0003-1288-1020, Joseph, Paul P ORCID: https://orcid.org/0000-0002-5503-9979, Zhang, X and Zhang, L ORCID: https://orcid.org/0000-0002-1282-992X (2025) An investigation of macro- and micro-structural properties of concrete with ceramic waste powder as a sustainable cement substitute. Journal of Building Engineering, 116. ISSN 2352-7102

Abstract

Previous studies have demonstrated that replacing cement with Ceramic Waste Powder (CWP) in concrete production is feasible without compromising the fundamental properties of the concrete. However, there is limited understanding of how CWP affects the development of strength during curing, as well as the thermal insulation performance at both ambient and elevated temperatures. Gaining insights into these property changes is essential to support the broader adoption of CWP in concrete applications. Moreover, few studies have quantitatively assessed the impact of CWP on the microstructural properties of concrete, including porosity, the extent of pozzolanic and alkali-silica reactions (ASR), and the degree of cement hydration. Understanding these micro-level changes is crucial for elucidating the mechanisms underlying improvements in strength, durability, and thermal performance, when cement is partially replaced by CWP. To address these gaps, this paper presents a comprehensive experimental investigation of the macro- and micro-properties of concrete with 10 % and 20 % cement replaced by CWP. The results show that replacing up to 20 % of cement with CWP enhances early-age strength development and thermal insulation compared to conventional concrete. Additionally, a 20 % CWP replacement reduces porosity, increases pozzolanic activity and cement hydration, and does not significantly trigger ASR. This study also compares CWP with other commonly used supplementary cementitious materials (SCMs), such as silica fume, fly ash and slag. The comparison indicates that CWP can improve both macro- and micro-properties by reducing porosity and enhancing pozzolanic activity, performing comparably to, or better than, conventional SCMs.

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