聚羧酸减水剂和含泥量对水泥浆体流变性能的影响  

Influence of Polycarboxylic Acid Water Reducer and Clay Content on Rheological Properties of Cement Paste

作　　者：温金保[1,2,3,4] 杜志芹 唐修生[1,2,3,4] 刘兴荣 WEN Jin-bao;DU Zhi-qin;TANG Xiu-sheng;LIU Xing-rong(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Nanjing R&D Hi-Tech Co.,Ltd.,Nanjing 210024,China;Research Center on New Materials in Hydraulic Structures of Ministry of Water Resources,Nanjing 210024,China;Academician Workstation,Anhui Ruihe New Materials Co.,Ltd.,Maanshan 243000,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]南京瑞迪高新技术有限公司,江苏南京210024 [3]水利部水工新材料工程技术研究中心,江苏南京210024 [4]安徽瑞和新材料有限公司安徽省院士工作站,安徽马鞍山243000

出　　处：《混凝土与水泥制品》2022年第4期1-5,共5页China Concrete and Cement Products

基　　金：中央级公益性科研院所基本科研业务基金项目(Y420010)。

摘　　要：通过测试流动度和由Bingham流变模型拟合所得的流变参数,研究了未掺与掺聚羧酸减水剂(TX50)两种条件下含泥量对水泥浆体流变性能的影响因素及其规律。结果表明:含泥量对水泥浆体塑性黏度的影响程度明显大于其对流动度的影响;水灰比与未掺减水剂的水泥浆体的流动度、塑性黏度、屈服应力分别呈线性关系、幂函数关系、指数关系;减水剂与RP8抑制组分的掺入均可增加水泥浆体的流动度,降低塑性黏度,且对流动度的影响程度明显大于对塑性黏度的影响程度。By testing the fluidity and the rheological parameters fitted by the Bingham rheological model,the influence factors and laws of clay content on the rheological properties of cement paste under the two conditions of not admixed and admixed with polycarboxylic acid water reducer(TX50)were studied.The results show that the effect of clay content on the plastic viscosity of cement paste is significantly greater than its impact on fluidity.The water-cement ratio and the fluidity,plastic viscosity,and yield stress of the cement paste without water reducer are linear,power function,and exponential respectively.The mixing of water reducer and RP8 inhibiting component can increase the fluidity of cement paste and reduce the plastic viscosity,and the impact on fluidity is significantly greater than the impact on plastic viscosity.

关 键 词：聚羧酸减水剂 黏土 水泥浆体 塑性黏度 流动度 含泥量 

分 类 号：TU528[建筑科学—建筑技术科学]