级配分布模数对复合胶凝材料浆体流变性能的影响
作者:
作者单位:

1.同济大学 先进土木工程材料教育部重点实验室,上海 201804;2.同济大学 材料科学与工程学院,上海 201804

作者简介:

蒋正武(1974—),男,安徽潜山人,同济大学教授,博士生导师,博士.E-mail:jzhw@tongji.edu.cn

通讯作者:

蒋正武(1974—),男,安徽潜山人,同济大学教授,博士生导师,博士.E-mail:jzhw@tongji.edu.cn

中图分类号:

TU525

基金项目:

“十四五”国家重点研发计划项目(2022YFC3803104);国家自然科学基金资助项目(U22B2076,51878480,52078369,52308274);宁波市重大科技攻关暨揭榜挂帅项目(2022Z030);中央高校基本科研业务费专项资金资助项目


Effect of Grading Distribution Modulus on Rheological Properties of Composite Cementitious Materials Paste
Author:
Affiliation:

1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, China;2.School of Materials Science and Engineering, Tongji University, Shanghai 201804, China

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    摘要:

    基于紧密堆积级配模型,研究了级配分布模数对复合胶凝材料浆体流变性能的影响.结果表明:Dinger-Funk模型级配分布模数对不同复合胶凝材料的屈服应力和塑性黏度具有不同的影响规律;浆体流变性能与湿堆积密实度存在一定的相关性,而水膜厚度是级配分布模数影响浆体流变性能的关键因素;随着水膜厚度的增加,复合胶凝材料浆体的屈服应力和塑性黏度呈幂指数型下降趋势,这一影响可通过简化YODEL模型和Ahmadah模型体现.

    Abstract:

    Based on a closely packed grading model, the effect of the grading distribution modulus on the rheological properties of composite cementitious material paste was studied. The results show that the effect of grading distribution modulus of the Dinger-Funk model on the yield stress and plastic viscosity of different composite pastes varies. The rheological properties of pastes are correlated with its wet packing density to a certain extent, and the water film thickness is a key factor affecting the rheological properties of the pastes through the grading distribution modulus. As the water film thickness increases, the yield stress and plastic viscosity of composite cementitious materials paste decrease in a power exponential manner. This effect can be represented by the simplified YODEL model and Ahmadah model.

    图1 胶凝材料粒径分布Fig.1 Particle distribution of cementitious materials
    图2 动态剪切流变测试中剪切速率随时间的变化Fig.2 Change of shear rate with time in DSR
    图3 浆体的剪切应力-剪切速率的曲线Fig.3 Shear stress-shear rate of pastes
    图4 浆体的拟合屈服应力和塑性黏度Fig.4 Fitted yield stress and plastic viscosity of pastes
    图5 水泥-粉煤灰浆体的湿堆积密实度Fig.5 Wet packing density of C-FA pastes
    图6 复合胶凝材料浆体的湿堆积密实度Fig.6 Wet packing density of composite cementitous materils pastes
    图7 浆体流变性能随湿堆积密实度的变化规律Fig.7 Variation of rheological properties in relation to wet packing density of pastes
    图8 浆体的水膜厚度Fig.8 Water film thickness of pastes
    图9 浆体流变性能与水膜厚度的关系Fig.9 Relationship between rheological properties and water film thickness of pastes
    图10 浆体屈服应力与胶凝材料物理特征的关系Fig.10 Relationship between yield stress of pastes and physical characteristics of cementitious materials
    图11 浆体塑性黏度与胶凝材料物理特征的关系Fig.11 Relationship between plastic viscosity of pastes and physical characteristics of cementitious materials
    表 1 胶凝材料基本物理性能参数Table 1 Basic physical properties of cementitious materials
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蒋正武,袁乐琅,任强.级配分布模数对复合胶凝材料浆体流变性能的影响[J].建筑材料学报,2025,28(2):144-152

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  • 收稿日期:2024-02-29
  • 最后修改日期:2024-03-17
  • 在线发布日期: 2025-03-11
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