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Recent advancements in eco-friendly building materials have highlighted kaolin-Al₂O₃)composites for its thermally insulated bricks. Because of its low thermal conductivity (0.15–0.25 W/m·K), refractory characteristics, and natural obtainability, kaolin is ideal for producing eco-friendly bricks[1]. Because of improved particle bonding, kaolin bricks with 10–30% Al₂O₃)reinforcement have a 30–50% increase in compressive strength. Nevertheless, high levels of Al₂O₃ (>30%) decrease workability and increase sintering costs [2]. Sawdust and other organic additives can add 30–50% porosity, which lowers thermal conductivity to 0.18–0.30 W/m·K. However, when porosity surpasses 50%, mechanical strength below 5 MPa may be compromised[3] . Inorganic additives such as perlite and vermiculite provide even better insulation (0.05–0.10 W/m·K), but their production costs increase by 20–25%. Energy comparisons have indicated that kaolin-AlO3 bricks have 30–50% less embodied energy and support superior thermal insulation performance when compared with burnt clay bricks.[4]. Not with standing these benefits, significant obstacles still exist, such as durability and increased expenses, necessitating more study into hybrid composites and nano-Al₂O₃ integration [5].
"A Review of Thermal Insulation Bricks from Kaolin and Aluminum Oxide for Sustainable Construction", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2455-2631, Vol.10, Issue 7, page no.b173-b177, July-2025, Available :http://www.ijrti.org/papers/IJRTI2507126.pdf
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2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator