Autoclaving of alkali-activated materials
Authors:
- D. Mierzwiński,
- J. Walter
Abstract
Alkali-activated materials are amorphous materials that look like natural stone or a concrete structure. As in the case of concrete, on the surface of alkali-activated materials, a white coating appears in the form of efflorescence. For conventional efflorescent concrete, the reaction between Ca(OH)2 with water and CO2 is generally harmless, except for the discolouration. In the case of alkali-activated materials, efflorescence can be a big problem, especially if they are exposed to moisture or in contact with water. The white efflorescence on the surface of the materials is sodium carbonate heptahydrate Na2CO3∙7H2O [1]. Various chemicals to prevent primary and secondary efflorescence can be used to reduce the appearance of the efflorescence. In the case of alkali-activated materials, this is a more complex process. The following paper proposes the use of hydrothermal processing during alkali-activated materials production. Hydrothermal treatment in an autoclave significantly reduced the appearance of efflorescence on the alkali-activated materials surfaces.
- Record ID
- CUTe22a853dcd85469fb8dd730739705965
- Publication categories
- ; ;
- Author
- Journal series
- IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, e-ISSN 1757-899X, Irregular
- Issue year
- 2019
- Vol
- 706
- Pages
- [1-8]
- Article number
- 012012
- Other elements of collation
- fot.; tab.; wykr.; Bibliografia (na s.) - 8; Bibliografia (liczba pozycji) - 8; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 706
- Conference
- Development of Eco-Friendly Composite Materials Based on Geopolymer Matrix and Reinforced with Waste Fibers (FIBER) (FIBER 2019), 2019, 28-11-2019 - 29-11-2019, Montevideo, Urugwaj
- Keywords in English
- alkali-activated materials, hydrothermal treatment, fly ash, autoclave, chemical reactor
- DOI
- DOI:10.1088/1757-899X/706/1/012012 Opening in a new tab
- URL
- https://iopscience.iop.org/article/10.1088/1757-899X/706/1/012012 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 5
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTe22a853dcd85469fb8dd730739705965/
- URN
urn:pkr-prod:CUTe22a853dcd85469fb8dd730739705965
* 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.