Abstract
Concrete pumping has been successfully adopted in modern construction. Various concrete including high-strength concrete and self-consolidating concrete can be pumped, but we still have a lack of understanding of the rheological behavior and its change during the pumping process. This study evaluates the effect of pumping pressure on the viscosity curves of cement-based materials incorporating a specific polycarboxylate. The viscosity of mortar samples increases with the pumping pressure. The viscosity increase depends on the rate of shear strain and the polymer structure of the polycarboxylate. The effect of pumping pressure is then generalized with a Sisko model. A mechanistic model for the phenomenon is discussed together with the stability potential formulated on the theory of shear-induced particle migration.
Recommended Citation
J. H. Kim et al., "Influence of Pumping Pressure on the Viscosity Curve and Rheological Stability of Mortar Incorporating Polycarboxylate," Cement and Concrete Composites, vol. 105, article no. 103419, Elsevier, Jan 2020.
The definitive version is available at https://doi.org/10.1016/j.cemconcomp.2019.103419
Department(s)
Civil, Architectural and Environmental Engineering
Publication Status
Full Text Access
Keywords and Phrases
Flow-induced particle migration; Polycarboxylate; Pumping; Segregation; Viscosity
International Standard Serial Number (ISSN)
0958-9465
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Elsevier, All rights reserved.
Publication Date
01 Jan 2020
Comments
Ministry of Education, Grant NRF-2018R1D1A1B07047321