Multi objective evaluations and development of sustainable Geopolymer concrete using Bio coal fly ash

Abstract

newline Coal is a non-renewable energy resource, exerting environmental threat by producing newlinefly ash and toxic gases. On the contrary bio coal briquettes derived from agricultural newlinewaste is a renewable energy resource which has great potential to replace coal. In the newlinepresent study, a novel sustainable approach towards utilization of bio coal-based fly newlineash (BFA) as Geopolymer concrete which alternatively reduces overall consumption newlineof cement which further helps controlling carbon emission, raw material newlineconsumption, land degradation and circular economy related to construction newlinematerials. The present study reveals micro-structural properties, feasibility studies, newlineworkability, mechanical analysis and durability study of modified geopolymer newlineconcrete. newlineIn the present study three bio coal briquettes with different agricultural waste (Cotton newline(CB), Maize-Saw dust (MB), Groundnut shell-Saw dust (GB)) were analysed. The newlinemajor studies like SEM-EDX, FTIR on BFA revealed a mimicking a characteristic as newlinecompared to coal based fly ash (CFA). Comparing the respective values with CFA newlineshowed a strong feasibility for the use of BFA as Geopolymer mortars. A varying newlinecomposition of CB, MB and GB based BFA with ground granulated blast furnace newlineslag (GGBS), Alccofine 1203® with natural resources sand and aggregate and newlinealkaline activator solution thoroughly mixed were casted, cured and analyzed for newlinecompressive, split tensile and flexural strength. The salinity shock was given to newlinemodified GPC cube and analyzed the difference between with and without salinity newlineshock compressive strength. The observed results of different BFA samples were newlinesignificantly good and sustainable with compare with coal based fly ash. Thus it has newlinehigh potential to be utilized as a construction material in various applications such as newlinepaver blocks, bricks, concrete etc. newlineKeywords: Agri-waste, BFA, CO2 emission, geopolymer concrete, sustainable