To Study the Behaviour of M30 Grade Concrete by Using Rice Husk Ash, Crushed Stone Dust, Recycled Plastic and Demolition and Debris

This study investigates the strength characteristics of M30 GRADE concrete composites incorporating sustainable alternatives to traditional cementitious and aggregate materials. Specifically, the research aims to quantify and compare the strength performance of conventional concrete specimens with other concrete where cement, fine aggregate, and coarse aggregate are partially replaced with rice husk ash (20%), crushed stone dust (20%), recycled-plastic (10%), & demolition and construction debris (20%), respectively. Preliminary findings suggest that formulations incorporating rice husk ash and recycled plastic achieve approximately 70% of the strength observed in conventional concrete specimens. On the other hand, the inclusion of crushed stone dust and demolition and construction debris demonstrates the potential for exceeding the strength attained by traditional concrete mixtures. Concrete specimens, in the form of cubes and cylinders, were fabricated incorporating varying replacement materials along with the traditional ones. These specimens, alongside conventional concrete, were subjected to standard curing for 7 and 28 days. Compressive and tensile strength were performed at both curing ages. Comparative analyses were then conducted between the modified concrete mixes and conventional concrete, allowing for a determination of the impact of each replacement material on the performance of the concrete. Some standardized laboratory tests were to be conducted. This includes assessment of compressive strength (indicate load-bearing capacity), and slump cone test (to determine fresh concrete's consistency and flow characteristics). Additionally, the split tensile strength (crucial for evaluating resistance to cracking). Beyond structural integrity, this research emphasizes the environmental benefits associated with utilizing these wastes, and readily available materials & helps reduce the demand for primary materials. The utilization of these low-cost products offers significant potential for reducing construction costs, and pollution and contributes to the development of solid– waste management and, promoting sustainable construction practices.