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2020 | OriginalPaper | Chapter

Evaluation of Structural Build-Up Rate of Cementitious Materials by Means of Constant Shear Rate Test: Parameter Study

Authors : Irina Ivanova, Viktor Mechtcherine

Published in: Rheology and Processing of Construction Materials

Publisher: Springer International Publishing

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Abstract

Accurate characterisation of static yield stress evolution with time enables correct evaluation of the structural build-up rate for cement-based materials. This parameter is fundamentally important for many construction processes, including conventional in-situ concrete construction, various digital fabrication techniques, well cementing, etc. The paper at hand presents a parameter study on determination of structural build-up by means of constant shear rate test. It is shown, how the choice of single or multiple samples as well as different constant shear rates and pre-shear regimes influences the apparent time-dependent static yield stress evolution of cementitious materials and, hence, the accuracy of structural build-up rate evaluation. Respective recommendations for decreasing error in measurements of static yield stress are provided.

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Metadata
Title
Evaluation of Structural Build-Up Rate of Cementitious Materials by Means of Constant Shear Rate Test: Parameter Study
Authors
Irina Ivanova
Viktor Mechtcherine
Copyright Year
2020
DOI
https://doi.org/10.1007/978-3-030-22566-7_25