Several million cubic meters of concrete are pumped daily, as this technique permits fast concrete placement. Fundamental research has been performed and practical guidelines have been developed to increase the knowledge of concrete behavior in pipes. However, the pumping process and concrete behavior are not fully understood. This paper gives an overview of the current knowledge of concrete pumping. At first, the known physics governing the flow of concrete in pipes are introduced. A series of experimental techniques characterizing concrete flow behavior near a smooth wall to predict pressure-flow rate relationships are discussed, followed by recent developments in the use of numerical simulations of concrete behavior in pipes. The influence of the pumping process on concrete rheology and air-void system is reviewed, and the first developments in active rheology control for concrete pumping are introduced. The last section of this paper gives an overview of open research questions and challenges.
D. Feys et al., "Pumping of Concrete: Understanding a Common Placement Method with Lots of Challenges," Cement and Concrete Research, vol. 154, article no. 106720, Elsevier, Apr 2022.
The definitive version is available at https://doi.org/10.1016/j.cemconres.2022.106720
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Concrete; Lubrication layer; Numerical simulation; Pumping; Rheology
International Standard Serial Number (ISSN)
Article - Journal
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01 Apr 2022