Resistance of non-cement binder to freezing and thawing cycles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43918800" target="_blank" >RIV/60461373:22310/19:43918800 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Resistance of non-cement binder to freezing and thawing cycles

Popis výsledku v původním jazyce

This study presents an investigation of a Sorfix (SFX) binder exposed to freezing and thawing cycles (FT) in water and in 3% NaCl solution. The Sorfix binder is a specific binder on the basis of selected mixture of sulphocalcic and high temperature fly ash modified by intergrinding and additivation similarly like hydraulic ternary binder system prepared previously. The Sorfix pastes and mortars were prepared by different conditions result in water to binder ratio ranged from 0.3 to 0.4 and 0.4 to 0.6, respectively. Freeze-thaw resistance to water and salt solution was evaluated for mass loss according to ČSN 73 1326 at every 25 freeze–thaw circulations. All the mixtures showed low mass loss after 100 FT cycles, except the mixtures without a superplasticizer. To identify the products formed by chloride attack, X-ray diffraction was performed on the selected samples after freeze–thaw circulation. The degradation material was found to consist of secondary ettringite (3CaO.Al2O3.3CaSO4.32H2O). The formation of the secondary ettringite was accelerated by chlorides attack trough a Friedel&apos;s salt (3CaO. Al2O3.CaCl2.10H2O).

Název v anglickém jazyce

Resistance of non-cement binder to freezing and thawing cycles

Popis výsledku anglicky

This study presents an investigation of a Sorfix (SFX) binder exposed to freezing and thawing cycles (FT) in water and in 3% NaCl solution. The Sorfix binder is a specific binder on the basis of selected mixture of sulphocalcic and high temperature fly ash modified by intergrinding and additivation similarly like hydraulic ternary binder system prepared previously. The Sorfix pastes and mortars were prepared by different conditions result in water to binder ratio ranged from 0.3 to 0.4 and 0.4 to 0.6, respectively. Freeze-thaw resistance to water and salt solution was evaluated for mass loss according to ČSN 73 1326 at every 25 freeze–thaw circulations. All the mixtures showed low mass loss after 100 FT cycles, except the mixtures without a superplasticizer. To identify the products formed by chloride attack, X-ray diffraction was performed on the selected samples after freeze–thaw circulation. The degradation material was found to consist of secondary ettringite (3CaO.Al2O3.3CaSO4.32H2O). The formation of the secondary ettringite was accelerated by chlorides attack trough a Friedel&apos;s salt (3CaO. Al2O3.CaCl2.10H2O).

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/TH02020163" target="_blank" >TH02020163: Vývoj a průmyslová optimalizace výrobních postupů stavebních hmot s využitím vysokého obsahu popílku</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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