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Review on Analytical Solutions for Slump Flow of Cement Paste

시멘트 페이스트의 슬럼프 유동 모사를 위한 분석적 해의 검토

Yun, Taeyoung
윤태영

  • Received : 2015.12.18
  • Accepted : 2016.05.25
  • Published : 2016.06.15

Abstract

PURPOSES : In this paper, the analytical solutions suggested to simulate the behavior of rheological fluids were rigorously re-derived and investigated for fixed conditions to evaluate the applicability for the solutions on a mini-cone slump test of cement paste. The selected solutions with proper boundary conditions can be used as reference solutions to evaluate the performance of numerical simulation approaches, such as the discrete element method. METHODS : The slump, height, and spread radius for the given boundary and yield stress conditions that are determined by five different analytical solutions are compared. RESULTS : The analytical solution based on fluid mechanics for pure shear flow shows similar results to that for intermediate flow at low yield stresses. The fluid mechanics-based analytical solution resulted in a very similar trend to the geometry-based analytical solution. However, it showed a higher slump at high yield stress and lower slump at low yield stress ranges than the geometry-based analytical model. The analytical solution based on the mini-cone geometry was not significantly affected by the yield criteria, such as von Mises and Tresca. CONCLUSIONS : Even though differences among the analytical solutions in terms of slump and spread radius existed, the difference can be considered insignificant when the solutions were used as reference to evaluate the appropriateness of numerical approaches, such as the discrete element method.

Keywords

analytical solution;slump test;cement paste;yield stress

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Cited by

  1. Numerical Analysis on Flow of Cement Paste Layers using 2D-CFD vol.20, pp.6, 2018, https://doi.org/10.7855/IJHE.2018.20.6.051

Acknowledgement

Supported by : 한국연구재단