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Title: Rheology of semi-solid fresh cement pastes and mortars in orifice extrusion
Authors: Zhou, X
Li, Z
Fan, M
Chen, H
Keywords: Constitutive rheological model;Extrusion;Fresh cement paste or mortar;Flow stress;Rheology;Semi-solid;Strain rate;Viscoplastic
Issue Date: 2013
Publisher: Elsevier
Citation: Cement and Concrete Composites, 37, 304 - 311, 2013
Abstract: Short fiber-reinforced semi-solid fresh cement pastes and mortars, tailored for extrusion, have much lower water-to-binder ratio and higher viscosity than normal cement pastes or mortars. The rheology of these pastes or mortars cannot be characterized by traditional rheology test methods suitable for normal fresh cement pastes or mortars with much greater water-to-binder ratio and lower viscosity. In this paper, orifice extrusion is employed to calibrate rheology of the semi-solid fresh cement mortar. An analytical model is developed for orifice extrusion of semi-solid pastes and mortars obeying a rigid-viscoplastic constitutive relationship, von-Mises yield criterion and the associated flow rule. Orifice extrusion results are interpreted using the analytical model and the established experiment data interpretation method, and the associated rheological parameters are derived for the semi-solid fresh cement mortar. This study provides a simple analytical model, together with experiment and data interpretation methods, for characterizing the complex intrinsic rheological behavior of semi-solid fresh cement pastes or mortars.
Description: This is the post-print version of the final paper published in Cement and Concrete Composites. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. Copyright @ 2013 Elsevier B.V.
ISSN: 0958-9465
Appears in Collections:Civil Engineering
Dept of Mechanical Aerospace and Civil Engineering Research Papers

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