Influence of Calcium Carbide Slag-Desulfurization Ash on Basic Properties and Microscopic Characteristics of Fluid Solidified Soil

Abstract

Abstract: The basic performance indexes of fluid solidified soil include wet density, bleeding rate, flow value and compressive strength. In order to explore the influence of calcium carbide slag and desulfurization ash on the basic properties and microscopic characteristics of fluid solidified soil, Ca(OH)₂ and CaSO₄ analytical reagents were replaced solely or simultaneously with the same amount of calcium carbide slag and desulfurization ash, and their effects on the flow value, bleeding rate and compressive strength of fluid solidified soil were tested. XRD and SEM were used to compare and analyze the phase composition and microscopic morphology of the samples prepared with two analytical reagents and two kinds of solid wastes at 28 d. The results show that the fluidities of the fluid solidified soil specimens prepared with calcium carbide slag and desulfurization ash are better than that of the fluid solidified soil mixed with Ca(OH)₂ and CaSO₄, and their bleeding rates meet requirement. The 28 d compressive strength of fluid solidified soil prepared with calcium carbide slag and desulfurization ash is less than that prepared with Ca(OH)₂ and CaSO₄ analytical reagents, but it can also meet the compressive strength requirements of most application scenarios.

Key words: fluid solidified soil, calcium carbide slag, desulfurization ash, fluidity, compressive strength, microstructure

CLC Number:

TU502

BAO Yijun, WANG Ningning, LI Shujin, WU Wenwen, CHEN Xudong, ZHANG Wenwen. Influence of Calcium Carbide Slag-Desulfurization Ash on Basic Properties and Microscopic Characteristics of Fluid Solidified Soil[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4449-4455.

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