Experimental Investigation Into The Mechanical & Durability Characteristics Of Alkali Activated Slag Concrete With Partial Replacement Of Waste Marble Powder And Bagasse Ash Powder Under Ambient Temperature Curing

Abstract

This study investigates the utilization of slag as a primary binder in concrete, both individually and in combination with other materials, through activation with alkaline solutions. The research delves into the performance of Alkali Activated Slag Concrete (AASC) specimens, employing various compositions including 100% ground granulated blast furnace slag (GGBS) as well as partial replacements of GGBS with Waste Marble Powder (WMP) and Bagasse Ash Powder (BAP), all cured at ambient temperature. The experimental parameters include 5% and 10% WMP, and 5%, 10%, and 15% BAP as replacements for GGBS, alongside 100% slag sand as fine aggregate. The study employs a 10M sodium hydroxide solution with an alkaline to binder ratio of 0.4. Mechanical properties such as compressive strength, split tensile strength, and flexural strength are assessed at intervals of 1, 3, 7, and 28 days, while durability performance is evaluated through immersion in HCl and MgSO4 solutions for 90 days. Comparative analysis is conducted between mixes of Ordinary Portland Cement (OPC) and AASC mixes containing 100% GGBS or partial replacements. Results indicate that AASC mixes with 10% Waste Marble Powder and 5% Bagasse Ash Powder exhibit higher mechanical strengths, with lower reductions in weight and compression strength compared to OPC mixes.