Structural Low Density Aggregate Concrete has an ability to reduce the self-weight of the structure as well as reduces the risk of earthquake damages to a structure because earthquake forces are proportional to mass of the structure. For structural application of lightweight concrete, the density is more important than the strength. A low density for the same strength level reduces the self-weight, foundation size and construction costs. In this study, structural lightweight aggregate concrete was designed with natural Perlite aggregate that will provide an advantage of reducing dead weight of structure also compared the strength of normal concrete with perlite concrete by fully replacing coarse aggregate with perlite by varying the water cement ratio in perlite concrete.

This thesis investigates the development and performance evaluation of perlite lightweight concrete, targeting its mechanical strength and durability for structural use. The research comprises three comprehensive phases aimed at enhancing various aspects of lightweight concrete formulations and structural behaviour., focuses on the design of concrete mixtures with varying proportions of perlite replacement (ranging from 10% to 50%) for three different grades (M30, and M40).