Utilizing Demolished Waste and GGBS in Cement Concrete

Abstract

In the current era of rapid development and innovation, the generation of waste materials is on the rise while natural resources are depleting. This situation necessitates the reuse of waste materials. In the construction industry, waste materials from dismantled buildings can be repurposed for small construction projects and roadworks. This study uses demolished aggregate, ggbs, and admixtures in various combinations. Demolished aggregate, a pure waste material, replaced natural coarse aggregate in proportions of 0%, 5%, 10%, 15%, 20% and 25%.

Additionally, cement was partially replaced with ggbs at 0%, 5%, 10%, 15%, 20%, and 25%, along with a water-reducing admixture of up to 2% by weight of cement. Various tests were conducted, including the specific gravity of coarse and fine aggregates, water absorption, impact value, slump cone, particle size distribution, and Los Angeles abrasion tests. Concrete cubes were cast using an M30 mix design and tested for compressive strength at 7 and 28 days and flexural strength at 28 days. The characteristic strength of the recycled concrete was compared with that of conventional concrete.