Design of New Process to Utilize Stubble Char for Constraction of M25 Concrete

Abstract

Considering the challenges posed by agricultural waste, specifically rice straw, this study focuses on implementing cost-effective and eco-friendly processes to transform rice straw waste intovaluable, high-demand materials (sodium carbonate and M-25 concrete). The analysis of rice straw reveals its primary composition of cellulose and sodium silicate, with a layered cellulose microstructure. To produce sodium carbonate, rice straw is subjected to incineration ina furnace, with the resulting effluent gas passing through aqueous NaOH to effectively capture CO 2 at room temperature and ambient pressure. Simultaneously, the ash generated from burning rice straw is employed as a pozzolanic material in the production of M25 grade concrete.Notably, the concrete containing 20% ash demonstrates an impressive compressive strength of 29.05 MPa after a 28day curing period. These results are highly promising for the potentialutilization of agricultural waste in the production of soda and concrete.