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dc.contributor.author
Ardant, Daria
dc.contributor.author
Brumaud, Coralie
dc.contributor.author
Habert, Guillaume
dc.date.accessioned
2020-10-16T14:11:16Z
dc.date.available
2020-10-11T05:17:55Z
dc.date.available
2020-10-16T14:11:16Z
dc.date.issued
2020
dc.identifier.issn
1359-5997
dc.identifier.issn
0025-5432
dc.identifier.issn
1871-6873
dc.identifier.other
10.1617/s11527-020-01564-y
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/445432
dc.description.abstract
The aim of this paper is to study the influence of the deflocculation/flocculation process on the cohesion of clay-based materials by investigating the changes in their internal structure. Indeed, as the cohesion of earth materials finds its origin in the capillary forces between clay particles, strongly linked to the porosity of the material, the relationship between the additives, porosity and compressive strength must be understood. The fresh state properties and hardened state properties of the clay mortars, mix designed with different types of mineral additives (phosphate-based as a dispersant and calcium and magnesium based as a coagulant), were determined and compared to those of their micro- and macrostructure based on thermal gravimetric analysis. The results show that the dispersant has a strong impact on the compression strength of clay-based materials due to the optimized organization of the clay particles during the deflocculation step, leading to an increase in the capillary force intensity. Experiments confirm that coagulants decrease the global porosity and compression strength according to their solubility and reaction time. When the reaction between the dispersant and the coagulant is slow, the benefit of the dispersant on clay platelet organization, which influences the mortar stiffness and global porosity, is maintained, and the final strength is high. The TGA confirms that the coagulant has no impact on the microporosity and that the earth material returns to its initial state. Finally, guidelines for mixing and pouring can be highlighted to maximize the strength of poured earth without the addition of hydraulic binder. © RILEM 2020.
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.subject
Self-compacted clay concrete
en_US
dc.subject
Deflocculation
en_US
dc.subject
Flocculation
en_US
dc.subject
Compressive strength
en_US
dc.subject
Porosity
en_US
dc.title
Influence of additives on poured earth strength development
en_US
dc.type
Journal Article
dc.date.published
2020-10-06
ethz.journal.title
Materials and Structures
ethz.journal.volume
53
en_US
ethz.journal.issue
5
en_US
ethz.journal.abbreviated
Mat. struct.
ethz.pages.start
127
en_US
ethz.size
17 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Dordrecht
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02604 - Inst. für Bau- & Infrastrukturmanagement / Inst. Construction&Infrastructure Manag.::03972 - Habert, Guillaume / Habert, Guillaume
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02604 - Inst. für Bau- & Infrastrukturmanagement / Inst. Construction&Infrastructure Manag.::03972 - Habert, Guillaume / Habert, Guillaume
ethz.date.deposited
2020-10-11T05:18:00Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2020-10-16T14:11:28Z
ethz.rosetta.lastUpdated
2021-02-15T18:26:18Z
ethz.rosetta.versionExported
true
ethz.COinS
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