Influence mechanism and calculation model of CPB rheological parameters

LIU Xiao-hui; WU Ai-xiang; WANG Hong-jiang; WANG Yi-ming

doi:10.13374/j.issn2095-9389.2017.02.004

Volume 39 Issue 2

Feb. 2017

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LIU Xiao-hui, WU Ai-xiang, WANG Hong-jiang, WANG Yi-ming. Influence mechanism and calculation model of CPB rheological parameters[J]. Chinese Journal of Engineering, 2017, 39(2): 190-195. doi: 10.13374/j.issn2095-9389.2017.02.004

Citation:

LIU Xiao-hui, WU Ai-xiang, WANG Hong-jiang, WANG Yi-ming. Influence mechanism and calculation model of CPB rheological parameters[J]. Chinese Journal of Engineering, 2017, 39(2): 190-195. doi: 10.13374/j.issn2095-9389.2017.02.004

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Influence mechanism and calculation model of CPB rheological parameters

doi: 10.13374/j.issn2095-9389.2017.02.004

School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2016-03-22

Abstract

Abstract

First, the quantitative characterization of cement paste backfilling (CPB) material characteristics was studied, and a comprehensive index called solid filling rate was presented to describe the interaction of material characteristics, through analyzing the substance composition of CPB microstructure. Then, rheological experiments were made to get the corresponding rheological curves, which were fitted by the Bingham model to get the yield stress and plastic viscosity of CPB. The influence of material characteristics such as volume fraction, weighted average grain diameter, nonuniform coefficient, the mass fraction of fine particles and cement on CPB rheological parameters was analyzed, and its mechanism was explained from the view of microstructure. At last, a calculation model of rheological parameters including solid filling rate was constructed. The results indicate that under the same conditions, the yield stress and plastic viscosity increase exponentially along with the increase of volume fraction, decrease with the increase of nonuniform coefficient, and decrease first and increase soon with the increase of fine particles.
- paste backfilling,
- yield stress,
- plastic viscosity,
- particle size distribution,
- flocculent structure

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References(8)

References

[1]	Nehdi M, Rahman M A. Estimating rheological properties of cement pastes using various rheological models for different test geometry, gap and surface friction. Cem Concr Res, 2004, 34(11):1993
[6]	Cheng D C H, Kruszewski A P, Senior J R, et al. The effect of particle size distribution on the rheology of an industrial suspension. J Mater Sci, 1990, 25(1):353
[7]	He M Z, Wang Y M, Forssberg E. Slurry rheology in wet ultrafine grinding of industrial minerals:a review. Powder Technol, 2004, 147(1):94
[8]	Kranenburg C. The fractal structure of cohesive sediment aggregates. Estuar Coast Shelf Sci, 1994, 39(6):451
[11]	Wallevik J E. Rheological properties of cement paste:thixotropic behavior and structural breakdown. Cem Concr Res, 2009, 39(1):14
[13]	Zhou J Z Q, Uhlherr P H T, Luo F T. Yield stress and maximum packing fraction of concentrated suspensions. Rheol Acta, 1995, 34(6):544
[15]	Liddel P V, Boger D V. Yield stress measurements with the vane. J Non-Newtonian Fluid Mech, 1996, 63(2):235
[16]	Saak A W, Jennings H M, Shah S P. The influence of wall slip on yield stress and viscoelastic measurements of cement paste. Cem Concr Res, 2001, 31(2):205