Authors: Dr. Arunkumar Bhat, Dr. Shaik Kabeer Ahmed, Ankitha K S
Abstract:Large amounts of waste byproducts are produced annually by the agro-industrial sector, but since they are poorly managed and their values are not understood, they pose risks to the environment, society, and the economy. Thus, using a mix design ratio of grade 40 MPa concrete (M 40), this study investigated the ash from cashew nutshell waste and substituted it with Ordinary Portland cement (OPC) at 35%, 50%, and 75%. To create cashew nutshell ash (CNSA), the cashew nutshell was sun-dried for 14 days before being burned in a gas furnace for 5 hours at 750 C. While investigating the workability of the fresh concrete, the CNSA's chemical and physical characteristics were looked at. Additionally, the hardened concrete's mechanical characteristics were examined. The results of the experiment showed that CNSA satisfies the criteria for usage as a pozzolanic material. Additionally, when the percentage of CNSA grew, the hardened concrete's compressive, splitting, tensile, and flexural strengths improved, reaching their peak at a 35% replacement level. The benefit of this study is that construction joints would be reduced as fresh concrete would be used for extended periods of time. Additionally, using CNSA concrete in environments with high sulfate concentration is advantageous.
Keywords- Agro-industrial waste, CNSA, Green concrete, SCC, partial- cement replacement
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