Sustainable Use of Autoclaved Aerated Concrete(AAC) Block Waste in Concrete

Abstract

The construction industry has a major impact on the environment and on resources. Autoclaved aerated concrete is an incredibly green, eco-friendly, and sustainable building material (AAC). The use of AAC is now highly necessary because to India's growing urbanization. It is consequently expected that post-demolition garbage will increase in the future. However, post-demolition AAC is mostly disposed of in landfills because to declining landfill capacities. This study looks into the idea of employing waste from autoclaved aerated concrete (AAC) blocks to replace coarse and fine aggregate in concrete separately at varied replacement levels of 4%, 8%, and 12%. The study aims to assess the impact of adding discarded AAC material on concrete's mechanical qualities. Through experimental investigation, the split tensile and compressive strengths were evaluated. The results demonstrate that increasing the proportion of AAC waste substitution typically leads to gains in compressive and split tensile strengths when compared to conventional aggregates. These findings suggest that residual AAC block material might be substituted for concrete in mixtures, the potentially material's aggregate strengthening and improving sustainability for use in construction. The main objective of this work is to employ locally available AAC trash as a lightweight aggregate in concrete production, potentially allowing industrial wastes to be transformed into higher-value products. The results of this study can aid in the growth of a circular economy in the construction industry by promoting the use of environmentally friendly alternatives in upcoming projects