Influence of pumping pressure on the viscosity curve and rheological stability of mortar incorporating polycarboxylate
作者： Jae Hong Kim , Seong Ho Han , Byoung Il Choi
DOI: 10.1016/J.CEMCONCOMP.2019.103419
关键词: Cement 、 Stability (probability) 、 Particle 、 Materials science 、 Composite material 、 Viscosity 、 Rheology 、 Polymer 、 Mortar 、 Shear stress
摘要: Abstract Concrete pumping has been successfully adopted in modern construction. Various concrete including high-strength and self-consolidating can be pumped, but we still have a lack of understanding the rheological behavior its change during process. This study evaluates effect pressure on viscosity curves cement-based materials incorporating specific polycarboxylate. The mortar samples increases with pressure. increase depends rate shear strain polymer structure is then generalized Sisko model. A mechanistic model for phenomenon discussed together stability potential formulated theory shear-induced particle migration.
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