水泥-大理石粉浆体流变性能与颗粒级配的关联度  

Analysis of Grey Connection between Particle Size Distribution of Ground Marble and Rheological Property of Cement-Ground Marble Pastes

作　　者：肖佳[1] 何彦琪[1] 王大富[1] 田承宇 徐勇[2] XIAOJia HE Yanqi WANG Dafu TIAN Chengyu XUYong(School of Civil Engineering, Central South University, Changsha 410075, China Research and Design Institute of China Hydropower Engineering Bureau 8 Co. , Ltd. , Changsha 410004, China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中国水利水电第八工程局有限公司科研设计院,湖南长沙410004

出　　处：《建筑材料学报》2017年第1期83-87,共5页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51278497)

摘　　要：采用Rheolab QC型旋转黏度计测定了水泥-大理石粉浆体不同剪切速率下的剪切应力和塑性黏度;采用Herschel-Bulkley模型对该浆体进行拟合得到其屈服应力、稠度系数和流性指数,并用触变环面积表征其触变性;采用灰色关联理论分析大理石粉颗粒级配对水泥浆体屈服应力、稠度系数、流性指数和触变性的影响.结果表明:随着大理石粉掺量的增大,水泥-大理石粉浆体的流动性逐渐提高,剪切变稀程度和触变性均逐渐降低;0~10μm的大理石粉质量分数与水泥-大理石粉浆体屈服应力、表观黏度和触变性呈正关联,大于10μm的大理石粉质量分数与之呈负关联,其中5~10μm的大理石粉为关键因子;0~10μm的大理石粉质量分数与水泥-大理石粉浆体的流性指数呈负关联,大于10μm的大理石粉质量分数与之呈正关联,其中20~50μm的大理石粉为关键因子.The relation of shear stress and plastic viscosity with shear rate of cement-ground marble pastes were studied by a rotational viscometer（mode Rheolab QC）. And the Herschel-Bulkley model was intro- duced to fit the yield stress, consistency coefficient and rheological index of cement-ground marble pastes, the thixotropy was characterized by thixotropic loop area. And the relevance of particle size distribution of cement-ground marble pastes was analyzed using grey connection theory. The results show that with the increase of ground marble content, slurry fluidity of the cement-ground marble pastes increases, and the degree of shear thinning decreases. The mass fraction of ground marble particles in the size ranging from 0- 10 μm has positive eorelation with yield stress, apparent viscosity and thixotropy while if particles 〉10 μm it has a negative corelation and 5 - 10 μm is the key factor. The mass fraction of ground marble particles in the size 1〉10μm has positive corelation with rheological index while if particle sizes are 0 - 10 μm it has a negative corelation and particles in the sizes of 20 - 50 μm is the key factor.

关 键 词：流变性能 大理石粉 灰色关联分析 颗粒级配 

分 类 号：TQ172.1[化学工程—水泥工业]