Application of concrete slurry waste in cement screeds

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00336627" target="_blank" >RIV/68407700:21110/19:00336627 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3846/mbmst.2019.072" target="_blank" >http://dx.doi.org/10.3846/mbmst.2019.072</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3846/mbmst.2019.072" target="_blank" >10.3846/mbmst.2019.072</a>

Result language
angličtina
Original language name
Application of concrete slurry waste in cement screeds
Original language description
Sedimented concrete slurry waste (CSW), containing cement, mineral additives, fine fillers, admixtures and water, is currently a waste without an additional use and has to be fully landfilled. Current CSW management is very expensive and introduces number of environmental risks due to its high pH, exceeding 11.5. This paper deals with the application of two types of CSW as cement replacement in cement screed. The evaluation was carried out in terms of workability and basic mechanical performance of the obtained composites. The applied cement replacement was up to 10 wt.% due to the negative impact on the rheology of fresh mixtures. Reduced workability consequently caused higher content of air in the fresh mixture. It was reflected by lower values of bulk density in hardened state for both studied CSW. These aspects were the reasons of decreased mechanical performance by approximately 15% per 5 wt.% of replacement. Conducted experimental program declared significant limits of CSW application in cement based composites, however additional processing of CSW could significantly modify its properties.
Czech name
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Czech description
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Project
<a href="/en/project/GA19-11027S" target="_blank" >GA19-11027S: Concrete slurry - hazardous waste or secondary raw material?</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
MODERN BUILDING MATERIALS, STRUCTURES AND TECHNIQUES MBMST 2019
ISBN
978-609-476-197-3
ISSN
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e-ISSN
2029-9915
Number of pages
6
Pages from-to
140-145
Publisher name
VGTU Press
Place of publication
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Event location
Vilnius
Event date
May 16, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—

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