Effect of Bottom Ash on Rheological and Physico-Mechanical Properties of High Early Strength Self-Compacting Brick (HES-SCB)

• Published in: Journal of Mechanical Engineering
• Main Author: Apandi N.M.; Zailani W.W.A.; Zain M.R.M.; Beddu S.; Ramli M.Z.; Sinarta I.N.; Agustini N.K.A.
• Format: Article
• Language: English
• Published: UiTM Press 2025
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85215662008&doi=10.24191%2fjmeche.v22i1.4557&partnerID=40&md5=3badbf8462e90e9d9caa63efa3768e81

This study delves into the environmentally responsible application of bottom ash (BA), a prevalent waste product from coal combustion in power plants, which constitutes 15% – 25% of total coal ash in Malaysia. The improper disposal of BA is a significant environmental hazard, with the potential to contaminate groundwater and soil, thereby affecting biodiversity and land usability. This study focuses on the novel application of BA in high early strength-self compacting brick (HES-SCB), known for its rapid strength development and satisfactory flow properties, eliminating the requirement for mechanical vibration during placement. The research meticulously evaluates the substitution of BA for sand in HES-SCB, with a special focus on its influence on the fresh and physico-mechanical characteristics of the bricks. Among various mixes, the 20% BA replacement level emerged as the most significant, demonstrating a superior balance of rheological and physico-mechanical properties, thereby underscoring BA's viability as a sustainable fine aggregate substitute in HES-SCB production. This mix is designated as HES-SCB due to its distinct properties: achieving high early strength essential for rapid construction processes and exhibiting self-compacting qualities that ensure ease of use and uniformity in application. © Nazirah Mohd Apandi et al, 2025