Preliminarily experimental research on local pressure loss of fresh concrete during pumping

被引：11

作者：

Chen, Jian ^{[1
,2
]}

Xie, Haibo ^{[2
]}

Guo, Jie ^{[1
,3
]}

Chen, Bin ^{[4
]}

Liu, Feng ^{[5
]}

机构：

[1] Univ Newcastle, Sch Engn, Newcastle, NSW 2308, Australia

[2] Zhejiang Univ, State Key Lab Fluid Power Transmiss & Control, Hangzhou 310027, Zhejiang, Peoples R China

[3] Univ Newcastle, Ctr Bulk Solids & Particulate Technol, Newcastle Inst Energy & Resources, Newcastle, NSW 2308, Australia

[4] Univ Newcastle, Newcastle Inst Energy & Resources, TUNRA Bulk Solids, Newcastle, NSW 2308, Australia

[5] Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA

来源：

MEASUREMENT | 2019年 / 147卷

关键词：

Concrete conveying pipes; Strain gauge; Yield stress; Plastic viscosity; POWER-LAW FLUIDS; FLOW; BINGHAM; DESIGN;

D O I：

10.1016/j.measurement.2019.106897

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The pressure of the fresh concrete during pumping in conveying pipes is critical in both concrete pump design and conveying pipes layout. The local pressure loss occurring at the connections between pipes, which often has been overlooked in the total pumping pressure research, is quite significant compared to the total pressure drop, especially for long conveying pipes. In this study, strain gauge based method was applied to measure the pressure drop at the connections of concrete during pumping. In this method, the strain gauges were calibrated by water pressure to obtain the correlation between the strain and pressure. An empirical equation for predicting the local pressure loss was also proposed and validated based on the experimental data. The results indicated that the pressure loss per pipe connection for general grades of concrete is within 0.01-0.045 MPa when the pumping rate ranges from 40 m(3)/h to 80 m(3)/h (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：9

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