An Experimental and Analytical Investigation on the Characteristics of Light Weight Concrete Using Waste Burnt Ash and Pumice Stones

Light weight concrete (LWC) has been successfully used since the ancient roman times and it has gained its popularity due to its lower density and superior insulation properties. Compared to the conventional concrete, LWC can significantly reduce the dead load of structural elements, which makes it especially attractive in the construction of multi-storey buildings. The materials used for preparing the light weight concrete is pumice stones, burnt waste material ash and GGBS. The coarse aggregates are partially replaced with pumice stones in the varying fractions of 10%, 20% and 30%. The cement are partially replaced with waste burnt ash in the proportions of 5%, 10% and 15%. Additionally 5% GGBS is introduced into that mix proportions. It is observed that by the optimum presence of light weight aggregates such as 15% of burnt ash and 30% of pumice stone, density of the concrete is reduced upto 2140 kg/m³. In the same time the compressive strength is achieved around 75% to 81% of the strength of the conventional concrete. Analytical equations models are arrived from LabVIEW software and it has been well correlated the experimental test results with the deviation of \(\pm\)20%.