工程科学学报2017，Vol.39Issue(2)：190-195,6.DOI:10.13374/j.issn2095-9389.2017.02.004
膏体流变参数影响机制及计算模型
Influence mechanism and calculation model of CPB rheological parameters
摘要
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 nonuni-form coefficient, and decrease first and increase soon with the increase of fine particles.关键词
膏体充填/屈服应力/塑性黏度/颗粒级配/絮网结构Key words
paste backfilling/yield stress/plastic viscosity/particle size distribution/flocculent structure分类
矿业与冶金引用本文复制引用
刘晓辉,吴爱祥,王洪江,王贻明..膏体流变参数影响机制及计算模型[J].工程科学学报,2017,39(2):190-195,6.基金项目
北京市社会发展领域储备项目(Z161100001216002) （Z161100001216002）
