矿物掺合料复掺对水泥基材料流变性能的影响  

Influence of mineral admixture double mixing on the cement base material rheological properties

作　　者：马保国[1] 付浩兵[1] 王慧贤[2] 王迎斌[1] 田振[1] 卢斯文[1] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070 [2]华北水利水电大学土木与交通学院,河南郑州450011

出　　处：《新型建筑材料》2013年第8期1-4,8,共5页New Building Materials

基　　金：国家自然科学基金项目(50378075)

摘　　要：采用Marsh筒法、H管法、微型坍落度法与流变仪法研究了在聚羧酸体系中复掺粉煤灰和矿粉2种矿物掺合料对水泥浆体流动性和流变性能的影响。试验结果表明:矿物掺合料的总取代量从20%增加到40%时,流动速度呈增大趋势;而在总掺量固定的条件下,随着粉煤灰掺量增加,流变性呈降低的趋势;流变试验结果表明,当总取代量为30%时,浆体表现出线性的牛顿流体特性,而总取代量为20%和40%时,浆体表现出非线性假塑性流体的特征。The Marsh cone method,H tube method,micro slumps method and rheometer method are used to study the influ- ence of double mixing of fly ash and mineral powder in polycarboxylic acid system on liquidity and theological properties of ce- ment slurry. Test results show that when the mineral admixture total substitution increased from 20% to 40% ,flow rate was in- creasing; while in total dosage fixed condition,with the fly ash content increased,the rheology was reducing：Rheological test results show that,when the total substitution is 30%,the slurry exhibits a linear Newtonian fluid properties, and when the replace content is 20% and 40%,the slurry exhibits the characteristics of nonlinear pseudoplastic fluid.

关 键 词：粉煤灰 矿粉 矿物掺合料 流变性 MARSH筒法 微型坍落度法 

分 类 号：TU528.04[建筑科学—建筑技术科学]