Investigation of Flyash Based Geopolymer Concrete Incorporating the Nanoparticles

Abstract

Geopolymer concrete, an eco-friendly alternative to traditional Portland cement- based concrete, has garnered significant attention due to its potential for reducing carbon emissions and environmental impact associated with cement production. This study delves into the enhancement of geopolymer concrete properties by incorporating nanomaterials and diverse supplementary cementitious materials. By utilizing industrial by-products and agricultural by-products like fly ash, rice husk ash (RHA), GGBS (Ground Granulated Blast Furnace Slag), and sugarcane bagasse ash, this study aims to optimize geopolymer concrete while minimizing its environmental footprint. The primary objective of this research is to explore the role of nanomaterials, specifically nano silica and nano TiO2, in enhancing the mechanical strength and durability of geopolymer concrete. The study commences by investigating binary combinations of fly ash and GGBS as cementitious materials for geopolymer concrete production. This initial phase serves as a baseline for assessing the impact of supplementary materials on concrete properties. Subsequently, a ternary mixture comprising 25% GGBS, 65% fly ash, and 10% bagasse ash is examined to study the combined effects of multiple pozzolanic materials in geopolymer concrete. This phase aims to identify synergies among supplementary materials that enhance concrete performance. The addition of GGBS eliminates the necessity for controlled curing, contributing to practical applicability. Furthermore, the study explores the influence of varying concentrations of nanoparticles in the ternary mixture. Different percentages of nano silica and nano TiO2 are added to assess their impact on the mechanical and durability properties of geopolymer concrete. Through rigorous testing, including compressive strength, split tensile strength, rapid chloride permeability, water absorption, and acid attack tests, the research evaluates the optimized compositions.