Enhancing Lightweight Concrete with Overburnt Broken Brickbats: Investigating Optimal Replacement Levels

Abstract

The abstract summarizes the research findings on lightweight self-compacting concrete (LWSCC) incorporating unburnt broken brick bats as partial replacements for natural gravel aggregates. Mechanical properties, including compressive, split tensile, and flexural strengths, were evaluated for LWSCC samples with replacement levels of 0%, 10%, 20%, and 30% by volume of natural gravel. The compressive strengths ranged from 28.133 to 33.85 N/mm², split tensile strengths ranged from 8.3 to 10.6 N/mm², and flexural strengths ranged from 3.24 to 5.73 N/mm² across the replacement levels. Additionally, fresh properties of the LWSCC have been assessed using L box, V funnel, and J ring tests to evaluate workability according to EFNARC guidelines. The results have indicated satisfactory workability properties for all replacement levels, confirming the feasibility of using unburnt broken brick bats in LWSCC mixtures. This research contributes to the understanding of incorporating alternative lightweight aggregates in concrete production, potentially reducing environmental impact and resource consumption associated with traditional aggregates. Furthermore, the mechanical properties demonstrate the potential of unburnt broken brick bats as a viable lightweight aggregate option in LWSCC formulations. These findings offer valuable insights for engineers and researchers seeking sustainable solutions in concrete technology and construction practices.

 Index Terms: Broken Brick Bats, Environmental Impact, Lightweight Concrete, Mechanical Properties, Sustainable Aggregates, Workability Assessment