Effect of Landfill Bio-sulfur on Cement Properties

초록

Treating hydrogen sulfide in landfills generates a large amount of bio-sulfur. Bio-sulfur is mainly used in agriculture because of its small particle size and excellent hydrophilicity. However, the actual amount used is very small and it is piled up in a landfill. Therefore, as a basic study for expanding the utilization of bio-sulfur, this study examines the effect of dried bio-sulfur on the physical properties and hydration reaction of ordinary Portland cement. The hydrate of cement with bio-sulfur at the start of aging was the same as that of plain cement, and sulfur was additionally confirmed. At curing age of 28 days, magnesium sulfate hydrate and kuzelite were also confirmed. As the amount of bio-sulfur added increased, the setting time decreased while the hydration heat tended to decrease. When cured in water, the compressive strength of the mortar with bio-sulfur was reduced compared to that of plain cement. For dry curing, the compressive strength was increased at the initial curing age and remained the same as plain cement at 28 days. © 2023, Korea Society of Waste Management. All rights reserved.

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