钢渣细骨料混凝土断裂性能研究

doi:10.11896/cldb.24090190

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Abstract To study the fracture performance of steel slag fine aggregate concrete (SSC), wedge splitting tests were conducted on SSC specimens with four different steel slag content levels (0%, 10%, 20% and 30%) and three different seam-height ratios (0.2, 0.3 and 0.4). The initial cracking load, peak load, and load-crack mouth opening displacement (P-CMOD) curves were measured during the fracture process. Based on the double-K fracture theory, fracture parameters such as initial cracking and unstable fracture toughness were calculated, and the variation of SSC fracture parameters with changes in steel slag content and seam-height ratio was analyzed. The results show that when the steel slag fine aggregate content is 0%—30%, the fracture performance of the concrete significantly improves with the increase of the steel fine aggregate content, and has the best enhancement with the maximum value of cracking and unstable fracture toughness when the steel slag content reaches 30%. Additionally, when the seam-height ratio is between 0.2 and 0.4, the initial cracking toughness of SSC is not affected by the seam-height ratio, suggesting it is an inherent property of the material. However, the unstable fracture toughness decreases slowly as the seam-height ratio increases.

Key words： steel slag fine aggregate concrete double-K fracture model fracture energy wedge splitting tensile test

Published: Online: 2025-10-27

CLC number:

TU528

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	Articles by authors
	XUE Gang
	WU Jinyue
	XU Sheng
	LIU Jiangsen
	DONG Wei

Cite this article:

XUE Gang,WU Jinyue,XU Sheng, et al. Study on the Fracture Mechanical Properties of Steel Slag Fine Aggregate Concrete[J]. Materials Reports, 2025, 39(20): 24090190-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24090190 OR https://www.mater-rep.com/EN/Y2025/V39/I20/24090190

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