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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1219" target="_blank" >LO1219: Udržitelný pokročilý rozvoj CET</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Magazine of Concrete Research

ISSN

0024-9831

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

1039-1051

Kód UT WoS článku

000444434300002

EID výsledku v databázi Scopus

2-s2.0-85053255293