The Rheological Properties and Yield Stress Model of High-Density Slurry Added with Coarse Sands

Abstract:

In order to determine the concentration range of high-density slurry with coarse sands for suiting pipeline transportation in Jinchuan mine, at the same time find a suitable model to predict yield stress. In this paper, based on the coarse sand of Jinchuan mine as material to prepare high-density slurry, studied on the rheological properties. Through two-factor variance analysis, qualitative and ration analysis of the effect was conducted on the cement content and mass concentration to rheological parameters. The results show that the rheological model of the coarse sand is similar to that of Bingham plastic fluid, the mass concentration has a significant effect on viscosity and yield stress, and the viscosity is significantly affected by the cement content. The mass concentration of 82%-84% is suitable gravity transportation in pipeline. Meanwhile the relation model is established between yield stress and water-cement ratio, aggregate volume concentration, the model has high precision. These provide technical basis for designing filling system and ensuring the stability of slurry transportation, and a new idea for the research of rheological properties.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 231-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.231
• Online since: July 2014
• Authors: Xiu Xiang Zhang*, Deng Pan Qiao
• Keywords: Coarse Sands, High-Density Slurry, Rheological Property, Yield Stress Model

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