Study Properties of Eco-Friendly Lightweight Concrete Made with Crushed Clay Bricks | ||||
| JES. Journal of Engineering Sciences | ||||
| Article 2, Volume 52, Issue 3, May 2024, Page 146-158 PDF (550.91 K) | ||||
| Document Type: Research Paper | ||||
| DOI: 10.21608/jesaun.2024.218298.1237 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Shiren Osman Ahmed 
| ||||
| Delta Higher Institute for Engineering and Technology | ||||
| Abstract | ||||
| Recycling crushed clay bricks (CCB) in concrete is a sustainable and cost-effective process. Huge quantities of crushed clay bricks waste cause many serious environmental problems around the world. To deal with this problem, crushed bricks were recycled in the concrete industry as an alternative to natural resources, and the brick powder was reused as a partial replacement for cement. The objective of this paper is to study the effect of crushed clay bricks on the characteristics of concrete. 7 concrete mixtures containing coarse crushed brick aggregate (CCBA) and fine crushed brick aggregate (FCBA) were prepared as a complete substitute for sand and dolomite, respectively. Clay brick powder (CBP) and silica fume were used as a partial substitute for cement by 5%, 10%, and 15% of its weight. The water-to-cement ratio was 0.35. For comparison, a control mixture was prepared. Various tests were conducted to evaluate the performance of concrete. The results showed that the workability of the different mixtures containing CCB decreased compared to that of the reference mixture. The compressive strength values of mixtures containing CCBA had a clear decrease compared to the reference mix at 7, 28, and 56 days of curing. The modulus of rupture results had the same path as compressive strength results. The thermal conductivity coefficient for mixtures including CCBA decreased compared to the control mix. Scanning Electron Microscope images indicated crystals of calcium silicate hydrate because of the pozzolanic interaction between the brick powder and the fine crushed clay bricks with calcium hydroxide. | ||||
| Keywords | ||||
| Thermal conductivity coefficient; Modulus of rupture; Microstructure; Water absorption; ultrasonic pulse velocity | ||||
| References | ||||
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