Effect of granite waste in slag-based geopolymer activated by RHA derivative

摘要

This study presents an in-depth investigation into the utilization of granite waste as a partial replacement for the M-sand in geopolymer concrete in various proportions such as 5, 10, 15, and 20%. Geopolymer in this study is made using GGBS as the precursor material and RHA-based derivative as the activator solution. The experimental research focuses on geopolymer concrete that is activated using a derivative of rice husk ash (RHA). The primary objective is to assess the potential enhancement of mechanical properties and durability characteristics by incorporating granite waste powder. A series of tests were conducted to evaluate the effects of varying levels of granite waste powder and RHA derivative on properties such as compressive, tensile, and flexural strengths, water absorption, chloride penetration resistance, and resistance to acid attack. Followed by the scrupulous discussion part, SEM analysis is performed to determine the morphology of the optimum specimen. The research revealed enhanced mechanical and durability properties at 10% utilization of granite waste due to the improved microstructure with reduced porosity owing to the fine and angular nature of granite waste. Additionally, geopolymer concrete activated with the RHA derivative demonstrates promising potential as a sustainable alternative to conventional alkaline activators. These findings contribute valuable insights to the field, offering a sustainable approach to enhancing geopolymer concrete properties while minimizing environmental impact.