RESISTANCE OF MIXTURES PREPARED FROM DIFFERENT CZECH FLY ASHES TO FREEZING AND THAWING

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922861" target="_blank" >RIV/60461373:22310/21:43922861 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.icct.cz/cs/Amca-ICCT/media/content/2021/proceedings/ICCT2021-Proceedings.pdf" target="_blank" >https://www.icct.cz/cs/Amca-ICCT/media/content/2021/proceedings/ICCT2021-Proceedings.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

RESISTANCE OF MIXTURES PREPARED FROM DIFFERENT CZECH FLY ASHES TO FREEZING AND THAWING

Popis výsledku v původním jazyce

Fly ashes (FAs) from Czech power plants and heating plants belong among the valuable secondary raw materials used in the construction industry. Their use as an admixture in cements reduces the consumption of primary raw materials and the amount of CO2 emissions arising from the production of new clinker. The aim of the work was to verify the utilization of various FAs from the Czech Republic as admixtures into cement pastes by means of freezing and thawing cycling (F-T) in the environment of H2O and 3 % NaCl solution. Furthermore, the effect of aeration and the effect of the amount of ash substitutes on F-T were investigated. It was found out that individual FAs have different resistance to F-T, as the resistance generally decreases with increasing number of F-T cycles. It was also confirmed that the paste containing FA resists F-T better in the environment of H2O than NaCl. Higher aeration of the pastes caused their higher resistance to F-T. In the NaCl environment, the paste with the highest degree of aeration exhibited the lowest corrosion. With the increasing replacement of FA by cement, the resistance of the mixture decreases in both environments.

Název v anglickém jazyce

RESISTANCE OF MIXTURES PREPARED FROM DIFFERENT CZECH FLY ASHES TO FREEZING AND THAWING

Popis výsledku anglicky

Fly ashes (FAs) from Czech power plants and heating plants belong among the valuable secondary raw materials used in the construction industry. Their use as an admixture in cements reduces the consumption of primary raw materials and the amount of CO2 emissions arising from the production of new clinker. The aim of the work was to verify the utilization of various FAs from the Czech Republic as admixtures into cement pastes by means of freezing and thawing cycling (F-T) in the environment of H2O and 3 % NaCl solution. Furthermore, the effect of aeration and the effect of the amount of ash substitutes on F-T were investigated. It was found out that individual FAs have different resistance to F-T, as the resistance generally decreases with increasing number of F-T cycles. It was also confirmed that the paste containing FA resists F-T better in the environment of H2O than NaCl. Higher aeration of the pastes caused their higher resistance to F-T. In the NaCl environment, the paste with the highest degree of aeration exhibited the lowest corrosion. With the increasing replacement of FA by cement, the resistance of the mixture decreases in both environments.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FW01010195" target="_blank" >FW01010195: Pokročilé výrobní technologie pro strategické využití a skladování vedlejších energetických produktů (VEP)</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 8th International Conference on Chemical Technology

ISBN

978-80-88307-08-2

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

249-254

Název nakladatele

Czech Society of Industrial Chemistry

Místo vydání

Prague

Místo konání akce

Praha

Datum konání akce

3. 5. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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