Investigation on the effect of ultra fine rice husk ash over slag based geopolymer concrete

Abstract

investigates the production of sustainable geopolymer concrete using industrial wastes such as Ground Granulated Blast Furnace Slag and ultra fine Rice Husk Ash (URA). The effect of partial substitution of GGBS with URA in proportions such as 0, 5, 10, 15 and 20 percent is investigated for workability, drying shrinkage, compressive and tensile strength over different ages of concrete ranging from 7 to 90 days. A micro structural investigation through Scanning Electron Microscope and X-Ray Diffraction Analysis is carried out to analyze the micro structure of matrix. Further a sustainability analysis is conducted over the geopolymer specimens through the parameters such as cost efficiency, energy efficiency and CO2 efficiency. Results from the tests indicate a significant enhancement in workability, compressive and tensile strength and decrease in the drying shrinkage values with 15 percent utilization of URA in GPC. Micro structural study also exhibited a compact and dense microstructure of the specimen. Results clearly portray the coexistence of both calcium based product and sodium based product. Sustainability analysis indicates increased cost efficiency and Eco efficiency and reduction in the energy consumption with the utilization of 15 percent of URA. The study also reported the possibility of reduction of carbon footprint by increasing the dependency over Geopolymer concrete. The findings of the study unleash hefty potential towards utilizing grounded RHA in alkali activated concrete.

Effect of SCBA and GGBFS on the performance of binary and ternary blended concrete

“…Workability is seen to be increased up to 25% cement replacement, as noted by R. Srinivasan et al also, strength in compression, split and flexural increases up to 10% replacement [8]. There will significantly enhance workability, compressive strength, and tensile strength by using GGBFS and rice husk ash [9]. Moulshree Dubey et al found the addition of GGBFS and metakaolin in binary concrete enhances the concrete performance [10].…”

Effect of varying molarity and curing conditions on the mechanical and microstructural characteristics of alkali activated GGBS binder

“…In order to mitigate the negative consequences associated with OPCdriven industries, it is imperative to explore alternative construction materials that significantly reduce cement consumption, thereby enhancing the sustainability of the construction sector. Such alternatives could encompass the incorporation of recycled materials or the implementation of more efficient production methodologies that curtail waste generation and energy consumption [5,6]. By conducting a thorough investigation and embracing the adoption of these viable substitutes, a meaningful contribution can be made towards mitigating the ecological consequences of the construction sector and forging a more sustainable trajectory for the future [7,8].…”