- 阎培渝1，黄 静2
2023年第7期
摘要
引用本文
摘 要：研究了超细粉煤灰掺量对低水胶比复合胶凝材料浆体流动性的影响，分析了浆体流动性与流变性能的关系。结果表明：在相同水胶比和硅灰掺量下，随着超细粉煤灰掺量的增加，浆体流动度增大，流动时长先缩短后延长，平均流动速率先提高后下降，浆体的黏度系数减小，屈服应力增大，剪切增稠性增强；在相同超细粉煤灰掺量下，浆体的流动度-黏度系数和流动度-屈服应力均呈负相关，黏度系数或屈服应力减小，浆体的流动度增大；在相同流动度下，当超细粉煤灰掺量较高时，浆体的黏度系数减小，屈服应力增大；浆体的流动度同时受其黏度和变形能力的影响。
Abstract: The influence of superfine fly ash content on the fluidity of low water-binder ratio composite cementitious material pastes was studied. The relationship between fluidity and rheological properties of pastes was analyzed. The results show that at the same water-binder ratio and content of silica fume, the flow spread of pastes increases, and flowing time of pastes shortens first and then lengthens, and average flowing rate of pastes increases first and then decreases with the increase of substituted rate of cement by superfine fly ash, and the viscosity coefficient of pastes decreases while their yield stress remains increasing. At the same content of superfine fly ash, both the relationships of flow spread and viscosity coefficient as well as yield stress of pastes are negative, and viscosity coefficient or yield stress decreases, and the fluidity of pastes increases. At the same fluidity, when the content of superfine fly ash is high, the viscosity coefficient of the pastes decreases and the yield stress increases. The fluidity of pastes is affected by both its viscosity and deformation capacity.
阎培渝,黄静.超细粉煤灰对低水胶比复合胶凝材料浆体流动性的影响[J].混凝土与水泥制品,2023(7):1-6.
YAN P Y,HUANG J.The effect of superfine fly ash on the fluidity of composite cementitious material paste with low water-binder ratio[J].China Concrete and Cement Products,2023(7):1-6.
