Performance of limestone cement concretes in chloride-sulfate environments at low temperature

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F18%3A00482331" target="_blank" >RIV/68378297:_____/18:00482331 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1680/jmacr.17.00288" target="_blank" >https://doi.org/10.1680/jmacr.17.00288</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1680/jmacr.17.00288" target="_blank" >10.1680/jmacr.17.00288</a>

Result language
angličtina
Original language name
Performance of limestone cement concretes in chloride-sulfate environments at low temperature
Original language description
Portland-limestone cement concretes were stored in two chloride-sulfate solutions, corresponding to exposure classes XS2, XA2 and XA3 specified by the European standard EN 206:2013, at 5±1 °C. Their performance was evaluated in terms of the limestone content (15% or 35% w/w) of the cements used and the partial replacement of limestone cement with natural pozzolana, fly ash, blastfurnace slag or metakaolin. Sulfate attack was monitored through visual inspection of the specimens, mass measurements, compressive strength tests and X-ray diffraction analysis. Chloride ions penetration was evaluated by determining total (acid-soluble) and free (water-soluble) chloride contents, as well as apparent chloride diffusion coefficients. Limestone cements favored thaumasite sulfate attack and chloride accumulation in concrete compared to ordinary portland cement. Mineral admixtures improved concrete's durability against sulfate attack, inhibited chloride penetration and enhanced chloride binding. Fly ash, metakaolin and blastfurnace slag were more effective than natural pozzolana. Higher sulfate content of storage solutions promoted deterioration, and decreased chloride diffusion coefficients. Concretes with mineral admixtures were competitive to ordinary portland cement concrete.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20501 - Materials engineering

Project
<a href="/en/project/LO1219" target="_blank" >LO1219: Sustainable advanced development of CET</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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