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Rheology of semi-solid fresh cement pastes and mortars in orifice extrusion

Rheology of semi-solid fresh cement pastes and mortars in orifice extrusion

Zhou, Xiangming, Li, Zongjin, Fan, Mizi and Chen, HuaPeng (2013) Rheology of semi-solid fresh cement pastes and mortars in orifice extrusion. Cement and Concrete Composites, 37. pp. 304-311. ISSN 0958-9465 (doi:https://doi.org/10.1016/j.cemconcomp.2013.01.004)

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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.

Item Type: Article
Additional Information: [1] First available online: 16 January 2013. [2] Published in print: March 2013.
Uncontrolled Keywords: constitutive rheological model, extrusion, fresh cement paste or mortar, flow stress, rheology, semi-solid, strain rate, viscoplastic
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
Related URLs:
Last Modified: 14 Oct 2016 09:24
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/10193

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