STUDY OF THE ALKALI-SILICA REACTION OF MORTARS WITH THE ADDITION OF MODIFIED FBC ASH

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43930061" target="_blank" >RIV/60461373:22310/23:43930061 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/23:00375877

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 MORTARS WITH THE ADDITION OF MODIFIED FBC ASH

Popis výsledku v původním jazyce

Alkali-silica reaction (ASR) is a long-term chemical reaction occurring at the interface between aggregate grains and the binder phase, leading to structural failure and degradation of mortars and concretes. Fly ash is one of the pozzolanic active material and is able to eliminate ASR in concrete. The effect of FBC ash on ASR is not well documented in the literature. The aim of this work was to observe the effect of the addition of FBC fly ash and FBC bottom ash and simultaneously the effect of particle size of these FBC ashes on ASR development. The accelerated expansion test according to ASTM 1260 was used to study ASR, which was further supplemented by studying the mechanical properties after exposing the prisms to 1 M NaOH solution for 28 days. The experiments were carried out on test prisms containing 30 wt.% FBC ash in 3 different grinding finenesses and with the addition of a 2-4 mm glass fraction. It was found that according to ASTM 1260, the CaO content of the FBC ash samples had a greater effect on ASR elimination compared to its fineness. The addition of FBC bottom ash achieved comparable results to blast furnace slag addition on ASR elimination, while the results on FBC fly ash were comparable to fly ash from conventional combustion. © 2023 40th Annual International Pittsburgh Coal Conference, PCC 2023. All rights reserved.

Název v anglickém jazyce

STUDY OF THE ALKALI-SILICA REACTION OF MORTARS WITH THE ADDITION OF MODIFIED FBC ASH

Popis výsledku anglicky

Alkali-silica reaction (ASR) is a long-term chemical reaction occurring at the interface between aggregate grains and the binder phase, leading to structural failure and degradation of mortars and concretes. Fly ash is one of the pozzolanic active material and is able to eliminate ASR in concrete. The effect of FBC ash on ASR is not well documented in the literature. The aim of this work was to observe the effect of the addition of FBC fly ash and FBC bottom ash and simultaneously the effect of particle size of these FBC ashes on ASR development. The accelerated expansion test according to ASTM 1260 was used to study ASR, which was further supplemented by studying the mechanical properties after exposing the prisms to 1 M NaOH solution for 28 days. The experiments were carried out on test prisms containing 30 wt.% FBC ash in 3 different grinding finenesses and with the addition of a 2-4 mm glass fraction. It was found that according to ASTM 1260, the CaO content of the FBC ash samples had a greater effect on ASR elimination compared to its fineness. The addition of FBC bottom ash achieved comparable results to blast furnace slag addition on ASR elimination, while the results on FBC fly ash were comparable to fly ash from conventional combustion. © 2023 40th Annual International Pittsburgh Coal Conference, PCC 2023. All rights reserved.

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

40th Annual International Pittsburgh Coal Conference, PCC 2023

ISBN

978-1-890977-38-2

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

International Pittsburgh Coal Conference

Místo vydání

Istanbul

Místo konání akce

Istanbul

Datum konání akce

4. 10. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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