玄武岩纤维-粉煤灰提升水泥土抗剪性能试验研究

doi:10.11896/cldb.24050216

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Abstract To solve the problems of roadbed instability and deformation caused by low shear performance of cement soil mixing piles, the effects of three factors such as initial water content, fly ash dosage and basalt fiber dosage on the mechanical properties of cement soil were analyzed by the direct shear test from a macroscopic point of view. Meanwhile, the reasons of mechanical parameters changes and the mechanism of the combined reinforcement of basalt fiber and fly ash were explored by the scanning electron microscope test (SEM). The results show that insufficient water content will restrict the hydration reaction of the cement and weaken the bonding of the soil particles to the hydration products, whereas excessive water content will increase the thickness of the bonded water film, which deteriorate the bonding properties between the cement soil particles. The anchoring and reinforcing action of the basalt fibers, coupled with their crack-arresting effects, enhances the homogeneity of stress distribution within cement soil. Concurrently, the aggregating action and its secondary reaction products of fly ash fill the internal pores of the cement soil. Together, these mechanisms significantly improve the shear resistance of the cement soil. Within the study range of this experiment, the best shear performance of cement soil is obtained when the fly ash dosage is 12%, basalt fiber dosage is 0.6%, and the initial moisture content is 15.67%.

Key words： cement soil basalt fiber fly ash shear performance reinforcement mechanism

Published: 15 August 2025 Online: 2025-08-15

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TU447

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	Articles by authors
	TU Yiliang
	REN Siyu
	ZHAO Lin
	LING Ling
	CHAI Hejun

Cite this article:

TU Yiliang,REN Siyu,ZHAO Lin, et al. Experimental Study of Basalt Fiber-Fly Ash to Enhance the Shear Properties of Cement Soil[J]. Materials Reports, 2025, 39(16): 24050216-8.

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https://www.mater-rep.com/EN/10.11896/cldb.24050216 OR https://www.mater-rep.com/EN/Y2025/V39/I16/24050216

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