Study of Micro structural behaviour (MSB) in geopolymer concrete (GPC) and material properties by using waste materials

Abstract

In economic growth, development of infrastructure plays a major role in the country’s. This study has overcome that to improve and nature of built in under environmentally. To overcome the problems, geopolymer concrete has been introduced which has the potential to completely eliminate conventional concrete. This study efforts on the development of light weight geo-polymer concrete and the results were related with the control mix. In this study, geopolymer concrete with Ground Granulated Blast Furnace Slag (GGBS-binder), manufactured sand (M−sand−fine aggregate), coconut shell and crushed granite (coarse aggregate) were used to produce Geopolymer Coconut Shell Concrete (GPCSC) and Geopolymer Conventional Concrete (GPCC) control mix. A introductory study was passed out for the range of a mix proportion over trial mixes. Provisional mixes were set in two mixes were used to study the possessions of geopolymer concrete GPCSC (1:3.56:1.07) and GPCC (1:5.17:4.65) with an alkaline/binder ratio of 0.75. An alkaline activator was equipped by uniting sodium silicate (Na2O, 15 %; SiO2, 28 %; and water, 57 % by mass: Na2SiO3) and sodium hydroxide (NaOH) solution with 10 Molarity. Micro structural analyses (X-ray diffraction analysis, transform infrared spectroscopy analysis, thermo-gravimetric analysis, and scanning electron-microscopy coupled with energy dispersive spectroscopy analysis) were done on the material. The mechanical behaviour of geopolymer concrete on compressive strength, split tensile strength, flexural strength, bond strength and stress strain behaviour are studied. The flexural and shear behaviour of GPCSC and GPCC were compared with the prediction equations based on stress block diagram and strain compatibility method. The long-term durability test was done on days 3, 7, 28, 56, 90, and 180 days. The durability characteristics of both GPCSC and GPCC were analysed.