Effects of Rheological Properties of Mortar and Magnetic Field Strength on Steel Fiber Distribution Characteristics

被引：0

作者：

Zhang C. ^{[1
]}

Bi M. ^{[2
]}

Liu T. ^{[3
]}

Ning J. ^{[3
]}

Duan G. ^{[1
]}

Zhang X. ^{[1
]}

Mu R. ^{[2
]}

机构：

[1] School of Materials Science and Engineering, University of Jinan, Jinan

[2] School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin

[3] Power China Shandong Pipeline Engineering Corporation Limited, Jinan

来源：

Cailiao Daobao/Materials Reports | 2022年 / 36卷 / 24期

基金：

中国国家自然科学基金;

关键词：

magnetic induction intensity; orientation coefficient; plastic viscosity; steel fiber; yield stress;

D O I：

10.11896/cldb.21110154

中图分类号：

学科分类号：

摘要：

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. © 2022 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

共 26 条

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