Experiment of shear thixotropy of cemented tailings filling slurry and its prediction model based on dimensional analysis

被引：0

作者：

Zhang Y.-Z. ^{[1
]}

Gan D.-Q. ^{[1
]}

Chen X. ^{[2
]}

Xue Z.-L. ^{[1
]}

Ren W.-C. ^{[1
]}

机构：

[1] College of Mining Engineering, North China University of Science and Technology, Tangshan

[2] School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2020年 / 30卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Dimensional; Filling slurry; Prediction model; Shear; Thixotropic behavior;

D O I：

10.11817/j.ysxb.1004.0609.2020-35737

中图分类号：

TU52 [非金属材料]; TV4 [水工材料];

学科分类号：

0805 ; 081503 ;

摘要：

The thixotropic behavior of filling slurry with different concentration and cement-sand ratio was studied by paddle rheometer. The thixotropy prediction model based on dimensional analysis was proposed. The results show that the thixotropic morphologies of slurry with different concentration are different, and the shear stress of slurry with high concentration is more fluctuating. The thixotropy is positively correlated with concentration and cement-sand ratio, and the cement can induce thixotropy more than tailings. During the shear process, the apparent viscosity first decreases rapidly, then maintains stable, and finally rises sharply, but the final value is less than the initial value. The shear stress of the slurry with mass concentration of 64% presents an irregular "U" shape before the turning point while the other groups, however, are basically symmetric around the turning point. The experiments are designed to verify the prediction model, and the results show that the average error rate is 6.2%, with good adaptability. © 2020, Science Press. All right reserved.

引用

页码：951 / 959

页数：8

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