EXPERIMENTAL ANALYSIS ON GEOPOLYMER SELF-CLEANING CONCRETE UTILIZING FLY ASH AND GGBS

Author

Tejendra Prajapati, Gaurav Jhanji

Abstract

 The development of geopolymer concrete as a substitute for traditional Portland cement concrete has been aided by the growing demand for long-lasting and sustainable building materials. This study examines the mechanical characteristics, durability, and self-cleaning effectiveness of fly ash and ground granulated blast furnace slag (GGBS)-based geopolymer self-cleaning concrete. The main aluminosilicate binders are fly ash and GGBS, which are activated with an alkaline solution of sodium hydroxide (NaOH) and sodium silicate (Na₂SiO₃). Through photocatalytic oxidation under light exposure, titanium dioxide (TiO₂) is used as a photocatalytic material to give self-cleaning capabilities. The study assesses how different fly ash–GGBS ratios and TiO₂ doses affect workability, split tensile strength, compressive strength, and water absorption. The degradation of specific surface contaminants or stains under regulated light exposure is measured in order to evaluate the self-cleaning performance. The goal of the study is to find a suitable mix of fly ash, GGBS, alkaline activator, and TiO₂ that enhances the concrete's surface-cleaning capacity and offers sufficient structural performance. The suggested geopolymer self-cleaning concrete might lessen reliance on regular Portland cement, make use of industrial byproducts, increase durability, and support low-maintenance, more sustainable building. A brief review about geopolymer self-cleaning concrete is deliberated in this study. RhB (Rhoda mine dye) discoloration under UV light, which is also regarded as a standard test for self-cleaning cementitious materials, is used to determine the self-cleaning property of the photocatalytic concrete. The findings will provide insight into the viability of substitutes for traditional concrete, and the concrete will be employed as an environmentally friendly self-cleaning agent thanks to the photocatalytic effect. A basic overview of self-cleaning concrete is also covered in this article. This study's primary goal was to compare the characteristics of concrete with fly ash and GGBS accumulation to the control mix in order to identify the benefits and drawbacks of doing so. Titanium dioxide (TiO2) serves as the photocatalytic component in this research, incorporated into concrete at a concentration of 3.0% to assess its impact. Moreover, the incorporation of fly ash and GGBS can enhance the self-compacting characteristics of this concrete. For M 25 and M30 concrete classifications, diverse percentile mixtures of fly ash and GGBS can replace cement by as much as 50%, with the relative ratios between them adjusting accordingly. The hardened concrete sample will undergo several evaluations, such as tensile, flexural, and compressive strength assessments. Newly mixed concrete will be subjected to a workability assessment to determine the properties of the self-cleaning concrete. A sodium chloride (NaCl) solution was employed to evaluate the durability of the self-cleaning concrete. RhB (Rhoda mine dye) fading when exposed to UV light, a prevalent evaluation for self-cleaning cementitious substances, is employed to determine the photocatalytic concrete's self-cleaning capabilities. The results will elucidate the feasibility of alternatives to conventional concrete, and the concrete will serve as an eco-friendly self-cleaning agent due to its photocatalytic properties.

Keywords

Geopolymer Concrete, Self Cleaning Concrete, Green Concrete, Photocatalytic action, Compressive Strength, Tensile Strength, Flexural Strength.

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