Numerical Investigation on Flexural Behaviour of Alkali Activated Rice husk Ash Based Concrete

Abstract

Because it is found to be more adaptable, long-lasting, and dependable, concrete, which is made of cement, aggregates, water, and additives, is the building material that is used the most worldwide. After water, which requires a lot of Portland cement, concrete is the second most commonly used material. The production of Ordinary Portland Cement (OPC) releases CO₂ into the atmosphere, wreaking havoc on the environment. Mining also causes irreversible damage to nature. In 1994, carbon emissions from cement production were estimated to be 307 MtC. As a result, it is urgent to find a cheaper alternative to cement and concrete. Geopolymer concrete is a novel building material that will be made by reacting chemically with inorganic molecules. Ricehusk ash, a by-product of the rice milling process, and fly ash, a byproduct of coal from a thermal power plant, are abundantly available worldwide. When fly ash with a lot of silica and alumina reacts with an alkaline solution, the result is an aluminosilicate gel that holds the concrete together. Without the use of any conventional Portland cement, it is an excellent alternative construction material. In some applications, geopolymer concrete is a greener alternative to regular Portland cement concrete. The structural properties of Ricehusk ash-based geopolymer concrete and its applications are briefly discussed in this paper.