Study of the alkali-silica reaction of processed fly ash and bottom ash

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927674" target="_blank" >RIV/60461373:22310/23:43927674 - 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

Study of the alkali-silica reaction of processed fly ash and bottom ash

Popis výsledku v původním jazyce

Development of alkali-silica reaction (ASR) in concretes and mortars is, among others, a possible cause of concrete construction failure. However, there are admixtures which can significantly mitigate ASR. Admixtures with such ability are generally pozzolans, moreover, energy by-products (CCPs) give very good results. This work aims to study the effect of the addition of fly ash (FA) and bottom ash (BA) as well as investigate the influence of CCPs particle size on ASR development. The ASR was studied using an accelerated dilatometric test according to ASTM 1260, complemented by an assessment of mechanical properties after immersion of tested samples into 1 M NaOH solution for 28 days. Experiments were performed on hardened samples containing 10 wt.% CCPs in 3 different grinding finenesses and with the addition of glass (size fraction 2–4 mm). Experiments performed on hardened samples with FA and BA indicate their positive effect on ASR elimination. The results showed that higher grinding finenesses of the admixtures resulted in minimal changes in the expansion reactions.

Název v anglickém jazyce

Study of the alkali-silica reaction of processed fly ash and bottom ash

Popis výsledku anglicky

Development of alkali-silica reaction (ASR) in concretes and mortars is, among others, a possible cause of concrete construction failure. However, there are admixtures which can significantly mitigate ASR. Admixtures with such ability are generally pozzolans, moreover, energy by-products (CCPs) give very good results. This work aims to study the effect of the addition of fly ash (FA) and bottom ash (BA) as well as investigate the influence of CCPs particle size on ASR development. The ASR was studied using an accelerated dilatometric test according to ASTM 1260, complemented by an assessment of mechanical properties after immersion of tested samples into 1 M NaOH solution for 28 days. Experiments were performed on hardened samples containing 10 wt.% CCPs in 3 different grinding finenesses and with the addition of glass (size fraction 2–4 mm). Experiments performed on hardened samples with FA and BA indicate their positive effect on ASR elimination. The results showed that higher grinding finenesses of the admixtures resulted in minimal changes in the expansion reactions.

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

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 10th International Conference on Chemical Technology

ISBN

978-80-88307-18-1

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

66-71

Název nakladatele

Czech Society of Industrial Chemistry

Místo vydání

Prague

Místo konání akce

Mikulov

Datum konání akce

24. 4. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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