Abstract
Adequate flowability is crucial to ensure proper homogeneity, mechanical properties, and durability of hardened concrete. A new parameter called the Shear Work Index (SWI), which combines yield stress and plastic viscosity, was recently proposed by the authors to evaluate concrete flowability. Factors that can influence SWI are analysed in this paper. Application methods of SWI are demonstrated through case studies involving the evaluation of rheology-modifying materials, the selection of the optimal manufactured sand replacement ratio in mixed sand, and the determination of concrete vibration time. The findings highlight the effectiveness of SWI as a comprehensive parameter for optimising concrete mix design and guiding concrete construction.
Keywords
concrete, shear work index, flowability, application methods
Date of Version
2025
DOI
10.5703/1288284318209
Recommended Citation
Yao, Wang; Gao, Jihong; Xu, Kunmiao; Guo, Baolin; Guo, Yongzhi; and Li, Qinfei, "A Unified Rheological Parameter for Concrete: Application of the Shear Work Index in Flowability Optimization" (2025). International Conference on Durability of Concrete Structures. 6.
https://docs.lib.purdue.edu/icdcs/2025/icc/6
A Unified Rheological Parameter for Concrete: Application of the Shear Work Index in Flowability Optimization
Adequate flowability is crucial to ensure proper homogeneity, mechanical properties, and durability of hardened concrete. A new parameter called the Shear Work Index (SWI), which combines yield stress and plastic viscosity, was recently proposed by the authors to evaluate concrete flowability. Factors that can influence SWI are analysed in this paper. Application methods of SWI are demonstrated through case studies involving the evaluation of rheology-modifying materials, the selection of the optimal manufactured sand replacement ratio in mixed sand, and the determination of concrete vibration time. The findings highlight the effectiveness of SWI as a comprehensive parameter for optimising concrete mix design and guiding concrete construction.
