<div class="csl-bib-body">
<div class="csl-entry">Liberto, T., Daneshvar, D., Robisson, A., & Dhar, S. (2023, March 1). <i>SAOS as a predictive tool to assess the residual reactivity in recycled binders</i> [Conference Presentation]. 32nd international Conference on Rheology of Building Materials 2023, Regensburg, Germany.</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/192278
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dc.description.abstract
Small oscillatory rheology (i.e., SAOS) has been used to describe the structural build-up of cement pastes (i.e., reactivity) and has recently proven a promising method to measure the nature of interactions between cementitious particles. Indeed, we show that the evolution of the storage modulus (G’) with time, imposing a deformation within the paste linear viscoelastic regime (LVE), tracks the development of interaction forces inside pastes and quantifies their cohesion. This gives information about the physico-chemical mechanisms happening at the microscopic scale, otherwise difficult to access experimentally through direct measurements.
This study applies this approach to the characterization of the residual reactivity of a milled high-performance concrete (mRHPC) targeted to be used as a supplementary cementitious material. Here, the use of SAOS is combined with X-ray powder diffraction (XRPD) and calorimetry. The characterization of the hardened properties of OPC-mRHPC binders was performed at different mRHPC replacement rates. The good mechanical performance of these samples confirms the residual reactivity measured by SAOS, linked to the presence of unreacted C3S and C2S (measured by XRPD). Our findings confirm rheology as a powerful tool to measure interaction in cementitious pastes and open a path to quantify the residual reactivity of recycled binders in order to optimize their use in new recipes, thus reducing OPC content.
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dc.language.iso
en
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dc.subject
SAOS (small oscillatory rheology)
en
dc.subject
recycled binders
en
dc.subject
XRPD
en
dc.subject
Calorimetry
en
dc.subject
Mechanical Testing
en
dc.subject
Sustainability
en
dc.title
SAOS as a predictive tool to assess the residual reactivity in recycled binders
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dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.researchTopic.id
M2
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tuw.researchTopic.id
E6
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Sustainable Production and Technologies
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tuw.researchTopic.value
50
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tuw.researchTopic.value
50
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tuw.publication.orgunit
E207-01 - Forschungsbereich Baustofflehre und Werkstofftechnologie
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tuw.author.orcid
0000-0002-4985-9110
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tuw.author.orcid
0000-0003-3785-7967
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tuw.author.orcid
0000-0002-2434-6175
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tuw.author.orcid
0000-0003-2484-194X
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tuw.event.name
32nd international Conference on Rheology of Building Materials 2023
