Detail publikačního výsledku
The Impact of Fly Ash after SNCR Treated with Tannin-Based Products on AAC Production
LÉDL, M.; GALVÁNKOVÁ, L.; DROCHYTKA, R.
Original Title
The Impact of Fly Ash after SNCR Treated with Tannin-Based Products on AAC Production
English Title
The Impact of Fly Ash after SNCR Treated with Tannin-Based Products on AAC Production
Type
Paper in proceedings (conference paper)
Original Abstract
This paper is focused on the effect of treatment of fly ash after SNCR with tannin on AAC production in order to reduce or stop ammonia leakage from the fresh mixture due to its alkalinity. A pure form of tannin and a tannin-based product „Farmatan“ were used as a treatment in dosage ranging from 0,5 g – 3 g of agent per 1 kg of fly ash. Efficient dosage was determined at 2 wt.% of fly ash by the speed of an indicator change due to gaseous ammonia diluted in water. The rheological properties of fresh mixtures were observed by consistency test in Viskomat showing that Farmatan causes delay of hydration. The results of bulk density and compressive strength testing revealed that Farmatan causes an increase of bulk density and at higher amount decreases the compressive strength because of thermal crack formation due to combined effect of delayed hydration and thixotropy. Using XRD analysis there were no differences in phase composition observed.
English abstract
This paper is focused on the effect of treatment of fly ash after SNCR with tannin on AAC production in order to reduce or stop ammonia leakage from the fresh mixture due to its alkalinity. A pure form of tannin and a tannin-based product „Farmatan“ were used as a treatment in dosage ranging from 0,5 g – 3 g of agent per 1 kg of fly ash. Efficient dosage was determined at 2 wt.% of fly ash by the speed of an indicator change due to gaseous ammonia diluted in water. The rheological properties of fresh mixtures were observed by consistency test in Viskomat showing that Farmatan causes delay of hydration. The results of bulk density and compressive strength testing revealed that Farmatan causes an increase of bulk density and at higher amount decreases the compressive strength because of thermal crack formation due to combined effect of delayed hydration and thixotropy. Using XRD analysis there were no differences in phase composition observed.
Keywords
Autoclaved aerated concrete; fly ash; selective non-catalytic reduction; tobermorite; ammonia; tannin
Key words in English
Autoclaved aerated concrete; fly ash; selective non-catalytic reduction; tobermorite; ammonia; tannin
Authors
LÉDL, M.; GALVÁNKOVÁ, L.; DROCHYTKA, R.
RIV year
2020
Released
16.08.2019
Publisher
Trans Tech Publications
Location
Switzerland
ISBN
978-3-0357-1550-7
Book
Solid State Phenomena
ISBN
1012-0394
Periodical
Solid State Phenomena
Volume
296
Number
1
State
Swiss Confederation
Pages from
173
Pages to
179
Pages count
7
URL
Full text in the Digital Library
BibTex
@inproceedings{BUT155581,
author="Matěj {Lédl} and Lucie {Dlabajová} and Rostislav {Drochytka}",
title="The Impact of Fly Ash after SNCR Treated with Tannin-Based Products on AAC Production",
booktitle="Solid State Phenomena",
year="2019",
journal="Solid State Phenomena",
volume="296",
number="1",
pages="173--179",
publisher="Trans Tech Publications",
address="Switzerland",
doi="10.4028/www.scientific.net/SSP.296.173",
isbn="978-3-0357-1550-7",
issn="1012-0394",
url="https://search.proquest.com/docview/2274004429?pq-origsite=gscholar&fromopenview=true"
}