Experimental investigation on mechanical and microstructure properties of bio-based kenaf concrete: a sustainable development approach

Abstract Amongst natural fibers, Kenaf plant-based fibers show 1.5T CO₂as sequestration rate from the atmosphere and every hectare of Kenaf consumes nearly 30–40T of CO₂ for each growing cycle. With its great potential as a low-cost material to absorb CO₂ from the environment, since kenaf fibers is a naturally available raw fiber it offers excellent structural strength, along with properties such as tensile strength and ductility. With such potential benefits, the present investigation aims to develop lightweight wall panel blocks incorporating Kenaf fiber at various proportions. A total of 30 concrete specimens were prepared with varying percentages of Kenaf fiber in the range of 0%, 0.75%, 1%, and 1.5%. Kenaf incorporated specimens developed were tested and subsequently subjected to curing periods of 7, 14, and 28 days with appropriate chemical treatment. Test results indicate that a rise in fiber content beyond a certain percentage drops the compressive strength and increases the water absorption. From the existing investigation, the optimum value of dosage of fiber content to develop building wall blocks was attained and diverse discussions were perceived relevant to the strength parameters. Hence the uniqueness of the present research study lies in its contribution to the environmental issues at the global level and results may serve as benchmarks for the environmentalists working from a sustainable point of view. This research encapsulates the feasibility and applicability of kenaf fibers for the application of concrete structural members with the evidence of appropriate experimental results performed on various strength characteristics to support the reduction of greenhouse gases in the atmosphere.