Effects of Elevated Temperature on Lightweight Concrete: Flexural Behaviour of Reinforced Concrete Beams and Performance Against Impact and Abrasion

Abstract

This research investigates the effects of elevated temperature on lightweight concrete, the flexural behaviour of reinforced concrete (RCC) beams, and the performance of lightweight concrete against impact and abrasion. Elevated temperatures can significantly influence the mechanical properties and durability of lightweight concrete, leading to strength reduction, thermal stresses, changes in microstructure, and potential loss of structural integrity. The flexural behaviour of RCC beams under loading involves nonlinear responses, crack formation, moment-curvature relationships, reinforcement yielding, and shear effects, all of which play crucial roles in beam performance and failure mechanisms. Lightweight concrete, while offering advantages such as reduced weight, may exhibit lower impact resistance and abrasion resistance compared to conventional concrete. However, proper mix design, material selection, and surface treatments can mitigate these drawbacks. This study emphasizes the importance of understanding the behaviour of lightweight concrete under various conditions and highlights strategies to enhance its performance in practical applications. Experimental investigations and standardized testing methods are essential for evaluating the response of lightweight concrete to elevated temperature, flexural loading, impact, and abrasion, providing valuable insights for design and construction practices.