4.7 Article

Horizontal-vertical ratio for concrete pumping pipe

Journal

CASE STUDIES IN CONSTRUCTION MATERIALS
Volume 16, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.cscm.2022.e00996

Keywords

Concrete pumping; Pipe; Rheology; Horizontal -vertical ratio; Computational fluid dynamics

Funding

  1. Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2020R1F1A1075838]
  2. National Research Foundation of Korea [2020R1F1A1075838] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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In this study, horizontal and vertical pumping experiments were conducted using rheology-based quantitative performance prediction technology to evaluate the concrete pumping performance. The correlation between experimental results and additional vertical lengths was analyzed using computational fluid dynamics. The study proposed a horizontal-vertical ratio relationship for the concrete pumping pipe.
For the construction of high-rise building, a horizontal pipe pumping test is usually conducted and using obtained test results, vertical actual constructing condition could be evaluated. In this study, horizontal and vertical pumping experiments are performed under various mixing and construction conditions using rheology-based quantitative performance prediction technology to derive a horizontal-vertical ratio of concrete pumping pipe for evaluating concrete pumping performance. Computational fluid dynamics is used to analyze the correlation between experimental results and additional vertical lengths. Analysis results confirm that compressive strength and plastic viscosity correlate with vertical and horizontal correlation coefficients; the pipe length, flow rate, and yield stress have no significant effect on the correlation coefficient. Based on analysis result considering various factors, multiple regression analysis is performed to propose horizontal-vertical ratio relationship for the concrete pumping pipe.

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