Publication result detail
Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)
GALVÁNKOVÁ, L.; LÉDL, M.; OPRAVIL, T.; BERANOVÁ, D.; TKACZ, J.
Original Title
Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)
English Title
Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)
Type
Paper in proceedings (conference paper)
Original Abstract
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.
English abstract
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.
Keywords
SNCR, fly ash, autoclaved aerated concrete, tobermorite
Key words in English
SNCR, fly ash, autoclaved aerated concrete, tobermorite
Authors
GALVÁNKOVÁ, L.; LÉDL, M.; OPRAVIL, T.; BERANOVÁ, D.; TKACZ, J.
RIV year
2019
Released
20.06.2018
Publisher
Trans Tech Publications
Location
Switzerland
ISBN
978-3-0357-1348-0
Book
Binders, Materials and Technologies in Modern Construction IV
ISBN
1662-9779
Periodical
Solid State Phenomena
Volume
276
State
Swiss Confederation
Pages from
167
Pages to
172
Pages count
6
URL
BibTex
@inproceedings{BUT144920,
author="Lucie {Dlabajová} and Matěj {Lédl} and Tomáš {Opravil} and Denisa {Beranová} and Jakub {Tkacz}",
title="Influence of ammonia content in SNCR fly ash on phase composition and morphology of autoclaved aerated concrete (AAC)",
booktitle="Binders, Materials and Technologies in Modern Construction IV",
year="2018",
journal="Solid State Phenomena",
volume="276",
pages="167--172",
publisher="Trans Tech Publications",
address="Switzerland",
doi="10.4028/www.scientific.net/SSP.276.167",
isbn="978-3-0357-1348-0",
issn="1012-0394",
url="https://doi.org/10.4028/www.scientific.net/SSP.276.167"
}