<div class="csl-bib-body">
<div class="csl-entry">Bakovic, T., Robisson, A., Preinstorfer, P., & Liberto, T. (2025, October 3). <i>Turning Sludge into Structure: Clay-Rich Residues for Poured Earth Construction</i> [Conference Presentation]. Earth Construction Forum (ECF 2025), Rapperswil-Jona, Switzerland. http://hdl.handle.net/20.500.12708/225693</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/225693
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dc.description.abstract
Washing sludges – mainly clay-rich residues from aggregate production – are largely traded as waste, with approximately 50 million tons generated annually in central Europe alone. This study explores their reuse as a resource for pourable construction materials. Three industrial and one artificially designed pourable sludge were investigated through combined rheological and mechanical testing. Results show that all tested materials achieve compressive strengths around 3 MPa, comparable to unstabilized rammed earth. Workability, assessed with slump tests, varied strongly with water demand, which was linked to differences in mineralogy rather than particle size distribution. A clear trade-off emerged: higher water content improved consistency but reduced compressive strength. The carbonate-rich sludges required less water for target consistency than the siliceous sludge, while the designed material achieved the best balance of workability and strength. These findings demonstrate that aggregate washing sludges, both natural and engineered, can be effectively valorized as low-emission building materials. By reducing stockpiling, their use offers a sustainable pathway toward circular construction practices.
en
dc.description.sponsorship
Umdasch Group Ventures GmbH
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dc.language.iso
en
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dc.subject
poured earth
en
dc.subject
waste management
en
dc.subject
recycling
en
dc.subject
clay sludge
en
dc.title
Turning Sludge into Structure: Clay-Rich Residues for Poured Earth Construction
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.relation.grantno
956873
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dc.type.category
Conference Presentation
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tuw.project.title
Basaltbewehrter Lehmbeton – „Wiederentdeckung und Aufwertung eines natürlichen Baumaterials“
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tuw.researchTopic.id
E6
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tuw.researchTopic.id
E5
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tuw.researchTopic.id
M4
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tuw.researchTopic.name
Sustainable Production and Technologies
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tuw.researchTopic.name
Efficient Utilisation of Material Resources
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tuw.researchTopic.name
Non-metallic Materials
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tuw.researchTopic.value
25
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tuw.researchTopic.value
50
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tuw.researchTopic.value
25
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tuw.publication.orgunit
E207-01 - Forschungsbereich Baustofflehre und Werkstofftechnologie
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tuw.publication.orgunit
E212-02 - Forschungsbereich Stahlbeton- und Massivbau
