Optimisation of bio medical waste ash in GGBS based of geopolymer concrete

Abstract

Bio-Medical Waste Ash (BMWA) in Geopolymer Concrete (GPC) has been studied for its potential use as a substitute for Ground Granulated Blast Furnace Slag (GGBS). The raw materials were determined to have physical and chemical characteristics. Bio-medical waste ash was used for GGBS at 0%, 1%, 2%, 3%, 4%, 5% 6%, 7%, 8%, 9% and 10% by weight replacement. The mixing proportion of the GGBS, M-Sand, and Alkaline solution is 1:2.21:3.48, respectively. A compressive strength test was performed for all of the specimens. Results showed that up to 10 % of BMWA replacement for GGBS had higher compressive strength than a standard mix (0 % BMWA). Use 7 % BMWA after 28 days of curing, the maximum compressive strength of 39.8 N / mm2 was achieved. After 28 days of curing, specimens prepared using 13 M NaOH yielded a better compressive strength than the normal mix. At 28 days of curing time, the average compressive strength of 40.12 N / mm2 was reached.