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http://dx.doi.org/10.14190/JRCR.2020.8.4.413

Suggestion of a Evaluation Method for Variation of Concrete Workability According to Pumping Condition through Lab-Scale Test  

Lee, Jung-Soo (Hybrid Structural Testing Center, Myongji University)
Jang, Kyong-Pil (Department of Living and Built Environment Research, KICT)
Kwon, Seung-Hee (Department of Civil and Environmental Engineering, Myongji University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.8, no.4, 2020 , pp. 413-420 More about this Journal
Abstract
In this study, a new lab-scale test equipment was developed to evaluate the variation of concrete workability after pumping. The equipment was designed to simulate the pressure and shearing applied to concrete during actual pumping. In order to examine the feasibility of evaluating variation of concrete workability through lab-scale test equipment, real-scale pumping tests and lab-scale tests were performed together. The design strength of concrete used in the both tests was 24, 35, and 60MPa, and the length of pipe used in pumping tests was 130, 304, and 518m. The lab-scale tests were performed in consideration of actual pumping conditions(pressure, shearing, and pumping duration time). The workability(slump or slum flow) of concrete was measured before test, after the pumping test, and after lab-scale test. In all tests, workability of all concrete mixtures decreased. In addition, the results of both tests were measured greatly similarly.
Keywords
Concrete pumping; Pressure; Shearing; Variation of workability; Test equipment;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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