<div class="csl-bib-body">
<div class="csl-entry">Maliqi, V., Daneshvar, D., Liberto, T., Reiter, G., Schichl, H., Kirnbauer, J., Robisson, A., & Stöllinger, W. (2022). UHPC Made with Recycled UHPC and Optimized with AI – an Infinite Reusability? In <i>EMI Book of Abstract</i> (pp. 357–357).</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/195296
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dc.description.abstract
Ultra-high performance concrete (UHPC) is designed to minimize water-to-binder ratio and maximize strength. This is done through the optimization of packing of all solids in the mixture, as well as the use of superplasticizer. In this study, we use recycled UHPC (freshly milled) to design a more sustainable UHPC, where the recycled UHPC is used to replace the sand (D50=320 μm), the quartz powder (D50=24 μm) and the cement itself (D50=12 μm).
Results show that recycled concrete can fully replace the sand without compromising the 1-D, 7-D and 28-D strengths. The quartz powder can also be replaced by recycled UHPC, either fully, with a drop of 28-D compressive
strength by 10 w%, or by half, without any drop in compressive strength. Lastly, and more importantly, replacing the cement with recycled UHPC by 10 w% results in a negligible 28-D compressive strength loss. Replacing cement at a rate of 50 w% results in a drop of strength by 30 %, from 121 MPa to 86 MPa. Surprisingly, when replacing 100 % of the cement with recycled concrete, the 28-D compressive strength still reaches 23 MPa. These results can at least partially be explained by the freshly milled reactivity of the recycled UHPC powder, measured by oscillatory rheology.
en
dc.language.iso
en
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dc.subject
UHPC
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dc.subject
Recycled Concrete
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dc.subject
Mechanical testing
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dc.subject
SAOS (small oscillatory rheology)
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dc.subject
AI
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dc.title
UHPC Made with Recycled UHPC and Optimized with AI – an Infinite Reusability?
en
dc.type
Inproceedings
en
dc.type
Konferenzbeitrag
de
dc.description.startpage
357
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dc.description.endpage
357
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dc.type.category
Abstract Book Contribution
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tuw.booktitle
EMI Book of Abstract
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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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dc.description.numberOfPages
1
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tuw.author.orcid
0000-0003-3785-7967
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tuw.author.orcid
0000-0002-4985-9110
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tuw.author.orcid
0000-0003-0183-9150
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tuw.event.name
Engineering Mechanics Institute Conference (EMI-2022)