大流动度水泥净浆流变模型研究  

Research on the Rheological Model of Cement Paste with Large Fluidity

作　　者：黄鹤 蒋亚清[1] 潘亭宏 吉旭平 Huang He;Jiang Yaqing;Pan Tinghong;Ji Xuping(College of Mechanics and Materials of Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学力学与材料学院,江苏南京211100

出　　处：《南京师大学报（自然科学版）》2021年第3期20-23,共4页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金重点项目(51738003).

摘　　要：为研究掺聚羧酸减水剂的新拌水泥基材料流变参数模型,通过RST-SST型旋转式流变仪测定了大流动度水泥净浆的流变曲线,将经验模型与理论模型得到的流变参数进行比对.结果表明:对大流动度水泥净浆,改进Bingham经验模型更加适用.Bingham模型得到的经验粘度值与浆体理论粘度更一致,其粘度参数可用于表征浆体粘度值.改进Bingham模型中各参数与浆体理论粘度满足定量关系式:η=η_(1)+100c.This paper aims at studying the rheological parameters model of fresh cementitious materials with polycarboxylic superplasticizers.Rheological properties of the high fluidity cement paste were measured by RST-SST rotational rheometer,and the rheological parameters obtained from the empirical model were compared with those from the theoretical model.The results show that the modified Bingham model is more applicable to high fluidity cement paste,the empirical viscosity values obtained from the Bingham model are more consistent with the theoretical viscosity of the paste and its viscosity parameters can be used to characterise the viscosity values of the paste.The parameters in the modified Bingham model satisfy a quantitative relationship with the theoretical viscosity of the paste:η=η_(1)+100c.

关 键 词：新拌水泥基材料 流变性能 流变模型 聚羧酸减水剂 

分 类 号：TU528[建筑科学—建筑技术科学]