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

Result code in 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>

Alternative codes found

RIV/68407700:21110/23:00375877

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/FW01010195" target="_blank" >FW01010195: Advanced and inovative processing technologies for strategic utilization and storing of coal combustion products (CCPs)</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Article name in the collection

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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Number of pages

8

Pages from-to

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Publisher name

International Pittsburgh Coal Conference

Place of publication

Istanbul

Event location

Istanbul

Event date

Oct 4, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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