Model fluids substituting fresh UHPC mixtures flow behaviour

Carboxymethylcellulose (CMC) and ultrasound gel (USG) seem to be suitable clear model fluids to substitute real ultra-high-performance concretes (UHPCs), enabling experimental monitoring of events occurring within these mixtures at similar flow behaviour. USG is eligible for UHPC mixtures with signi...

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Veröffentlicht in:Archive of applied mechanics (1991) 2023-07, Vol.93 (7), p.2877-2890
Hauptverfasser: Dostál, Martin, Moravec, Jiří, Jirout, Tomáš, Rydval, Milan, Hurtig, Karel, Jiroutová, Dita
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container_end_page 2890
container_issue 7
container_start_page 2877
container_title Archive of applied mechanics (1991)
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creator Dostál, Martin
Moravec, Jiří
Jirout, Tomáš
Rydval, Milan
Hurtig, Karel
Jiroutová, Dita
description Carboxymethylcellulose (CMC) and ultrasound gel (USG) seem to be suitable clear model fluids to substitute real ultra-high-performance concretes (UHPCs), enabling experimental monitoring of events occurring within these mixtures at similar flow behaviour. USG is eligible for UHPC mixtures with significant yield stress. CMC having a suitable concentration is better for UHPCs exhibiting indistinct yield stress. The rheological behaviour of real UHPC mixtures as well as substituting model fluids was measured using a non-standard system consisting of a vessel stirred by an anchor or a screw agitator. In addition, a standard rotational rheometer system with concentric cylinder geometry was used for optimization of the above-mentioned method of measurement and also for measuring the rheological parameters of the substituting model fluids. This article deals with the methodology for measuring the rheological properties of these substances and presents the results of the measurements using flow curves and rheological models.
doi_str_mv 10.1007/s00419-023-02412-5
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subjects Classical Mechanics
Concentric cylinders
Engineering
Fluid flow
Measurement methods
Mixtures
Optimization
Original
Rheological properties
Theoretical and Applied Mechanics
Ultra high performance concrete
Yield strength
Yield stress
title Model fluids substituting fresh UHPC mixtures flow behaviour
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