Review on the Hybridized Application of Natural Fiber in the Development of Geopolymer Concrete

Abstract

Global availability, cost-effectiveness and the excellent crack bridging mechanism offered by the natural fibers played a vital role in the development of sustainable construction. On the other hand, research works in the geopolymer concrete are a significant domain in terms of its zero carbon footprints. Hybridization of natural fibers such as coir and sisal etc, in the geopolymer composite enhanced the ductility and flexural strength of the composite by 37 to 60% than the one developed by synthetic fiber alone. This paper aims to review the reinforcement hybridized effect of natural fiber in the geopolymer concrete development. In case of natural organic fibers, the presence of high polarized hydroxyl groups such as hemicelluloses and lignin reduced the rate of polymerization process and induced porosity. But, the fiber cellulosic content bridges the micro cracks and enhanced the ductility by 60% in the geopolymer composites. Also, the thermal instability and excessive hydrophilic tendency of the natural fibers affects the thermal and workability properties. To overcome these effects, this paper highlights the variation of the behavioral changes by correlating the natural fiber properties and mechanism in order to ensure the development of the most sustainable and eco-friendly natural fiber reinforced geopolymer concrete construction.