砂浆流变性能和外界磁场强度对钢纤维分布特征的影响

doi:10.11896/cldb.21110154

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Abstract To adjust the yield stress and plastic viscosity of mortar, the amount of superplasticizer was changed. Effects of yield stress, plastic viscosity and magnetic field strength on the dispersion and directivity of steel fibers were analyzed. The results showed that when the yield stress was less than 16.5 Pa, steel fiber could overcome the yield stress and rotate and orient along the flow direction under the action of mortar flow shear and self-gravity. With the increase of flow distance, orientation coefficient gradually increased, but when the flow distance was greater than 0.4 m, orientation coefficient tended to be stable. When yield stress was less than 2.5 Pa and plastic viscosity was less than 10 Pa·s, the steel fiber would settle. In addition, increasing the intensity of the external magnetic field could significantly improve orientation coefficient of steel fiber. When the content of the superplasticizer was certain, orientation coefficient of steel fiber of cement mortar passing through a 6.39 mT magnetic field was increased by 18%—40% compared with that without a magnetic field.

Key words： steel fiber yield stress plastic viscosity magnetic induction intensity orientation coefficient

Published: Online: 2023-01-03

CLC number:

TU528

Fund:National Natural Science Foundation of China (52178211,51878239).

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	Articles by authors
	ZHANG Chong
	BI Mengdi
	LIU Tongjun
	NING Jinghua
	DUAN Guangbin
	ZHANG Xiuzhi
	MU Ru

Cite this article:

ZHANG Chong,BI Mengdi,LIU Tongjun, et al. Effects of Rheological Properties of Mortar and Magnetic Field Strength on Steel Fiber Distribution Characteristics[J]. Materials Reports, 2022, 36(24): 21110154-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21110154 OR http://www.mater-rep.com/EN/Y2022/V36/I24/21110154

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