The binding properties of cementitious materials using circulating fluidized bed co-fired fly ash and pulverised coal fly ash
Authors:
- Wei-Ting Lin,
- An Cheng,
- Michał Łach,
- Krzysztof Miernik,
- Kinga Korniejenko
Abstract
This study aims to investigate the binding properties of co-fired fly ash (CFFA) in paste and mortar specimens. Paste specimens containing various CFFA proportions (25%, 50%, 75%, 100% by weight of cement) were conducted and evaluated using setting time tests, water demand tests and compressive strength tests. Mortar specimens containing various CFFA and Pulverised coal fly ash (PCFA) proportions (10%, 20%, 30% by weight of cement) were also conducted and compared with regard to flowability and compressive strength. The test results indicated that the water demand increased as the amount of CFFA replacement increased on the flow level at 110±3%; this is due to the higher ignition loss (L.O.I.). Higher L.O.I. values mean that there are more unburned carbon particles in the CFFA and that most of these carbon particles are porous. The compressive strength of mortar specimens decreased as the amount of CFFA replacement increased. Compared to the chemical compositions of cement (C3S, C2S), the main components of CFFA (Ca(OH)2, CaCO3, CaO) have lower crystalline strength and compactness. Therefore, the higher amount of CFFA replacement would inevitably cause a reduction of the cement contents of specimens, thereby reducing the compressive strength of the mortar specimens. Thus, an appropriate amount of superplasticiser and CFFA replacement in the mixture is useful with regard to the binding properties of cementitious materials.
- Record ID
- CUT8a137a8b43634d988f8bd4ac009ebc6b
- Publication categories
- ; ;
- Author
- Pages
- [1-8]
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 7-8; Bibliografia (liczba pozycji) - 12; Oznaczenie streszczenia - Abstr.
- Substantive notes
- Section: E-mobility, Sustainable Materials and Technologies
- Book
- Tracz Tomasz, Tomasz Tracz Mróz Katarzyna, Katarzyna Mróz Zdeb Tomasz Tomasz Zdeb (eds.): MATBUD’2020 – Scientific-Technical Conference: E-mobility, Sustainable Materials and Technologies, MATEC Web of Conferences, no. 322, 2020, [S.l.], EDP Sciences, ISBN 978-2-7598-9108-5
- Keywords in English
- circulating fluidized bed, fly ash, co-fired fly ash, pulverised coal fly ash
- DOI
- DOI:10.1051/matecconf/202032201003 Opening in a new tab
- URL
- https://www.matec-conferences.org/articles/matecconf/abs/2020/18/matecconf_matbud2020_01003/matecconf_matbud2020_01003.html Opening in a new tab
- Related project
- E-mobilność oraz zrównoważone materiały i technologie. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 5
- Additional fields
- Indeksowana w: Web of Science
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT8a137a8b43634d988f8bd4ac009ebc6b/
- URN
urn:pkr-prod:CUT8a137a8b43634d988f8bd4ac009ebc6b
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.