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
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)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Related URLs:	Organisation
Last Modified:	14 Feb 2020 12:48
URI:	http://gala.gre.ac.uk/id/eprint/10193

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