Volume 18, No. 5, 2021
Lime-Rich Sludge Catalysis of Powdered Blast-Furnace Slag with and Without Rice Husk Ash
Yatika Gori , Durgeshwar Pratap Singh , Anoop Bahuguna
Abstract
More and more people are concerned about environmental cleanliness and preserving the biosphere's delicate eco-system. Despite the widespread belief that economic expansion and riskfree environmental preservation cannot coexist, achieving sustainable growth without compromising environmental quality is not an impossible task. The purpose of this research is to analyse how lime rich sludge (LRS), a waste product from the acetylene industry, affects the activation of granulated blast-furnace slag (GBFS). After 4 hours of calcining at 850 degrees Celsius, the LRS was allowed to cool in the furnace before being slaked with water and dried at 80 degrees Celsius for 24 hours. Ten, twenty, and thirty percent LRS were used in lieu of GBFS. The findings demonstrated an increase in combined water and free lime with increasing LRS concentrations. Compressive strength values for GBFS-LRS blends rise up to 20 weight percent LRS, but drop after reaching 30 weight percent LRS. Variable quantities of rice husk ash (RHA) were added to a mixture comprising 30 wt., percent of LRS in order to increase its compressive strength. Compressive strength was shown to improve with increasing RHA concentration. Results from XRD, FTIR, and TG/DTG tests corroborate the chemical and mechanical characteristics of GBFS-LRS blends in the presence and absence of RHA.
Pages: 3049-3057
Keywords: Granulated blast-furnace slag, lime-rich sludge, rice husk ash, compressive strength.