Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F18%3APU126621" target="_blank" >RIV/00216305:26310/18:PU126621 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.4028/www.scientific.net/SSP.276.167" target="_blank" >https://doi.org/10.4028/www.scientific.net/SSP.276.167</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/SSP.276.167" target="_blank" >10.4028/www.scientific.net/SSP.276.167</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)

Popis výsledku v původním jazyce

In production of AAC the fly ash was used as a source of SiO2 for many years. Now, after introducing a selective non-catalytic reduction (SNCR) technology to coal combustion process, the fly ash contain ammonia in a form of soluble salts, such as NH4HSO4 and (NH4)2SO4, which causes problems during manufacturing the AAC. Among all the influence of ammonia ions to the phase composition of the final product was not fully described. The main aim of this contribution is to describe the influence of ammonia to phase composition and morphology of autoclaved aerated concrete (AAC). For preparing AAC in laboratory conditions, the fly ash with various content of ammonia was used. The amount of ammonia before and after the hydrothermal reaction was measured by VIS spectrofotometry. The phase composition of prepared samples was determined by means of X-ray diffractometry and confirmed by TG-DTA analysis. The influence of the ammonia to the morphology of final products was studied by scanning electron microscopy.

Název v anglickém jazyce

Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)

Popis výsledku anglicky

In production of AAC the fly ash was used as a source of SiO2 for many years. Now, after introducing a selective non-catalytic reduction (SNCR) technology to coal combustion process, the fly ash contain ammonia in a form of soluble salts, such as NH4HSO4 and (NH4)2SO4, which causes problems during manufacturing the AAC. Among all the influence of ammonia ions to the phase composition of the final product was not fully described. The main aim of this contribution is to describe the influence of ammonia to phase composition and morphology of autoclaved aerated concrete (AAC). For preparing AAC in laboratory conditions, the fly ash with various content of ammonia was used. The amount of ammonia before and after the hydrothermal reaction was measured by VIS spectrofotometry. The phase composition of prepared samples was determined by means of X-ray diffractometry and confirmed by TG-DTA analysis. The influence of the ammonia to the morphology of final products was studied by scanning electron microscopy.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Binders, Materials and Technologies in Modern Construction IV

ISBN

978-3-0357-1348-0

ISSN

1662-9779

e-ISSN

—

Počet stran výsledku

6

Strana od-do

167-172

Název nakladatele

Trans Tech Publications

Místo vydání

Switzerland

Místo konání akce

Brno

Datum konání akce

7. 12. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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