Thermodynamic Stability of Ettringite Formed by Hydration of Ye’elimite Clinker
Joint Authors
Fridrichová, Marcela
Dvořák, Karel
Gazdič, Dominik
Mokrá, Jana
Kulísek, Karel
Source
Advances in Materials Science and Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-09-07
Country of Publication
Egypt
No. of Pages
7
Abstract EN
In order to save limited natural resources by utilising industrial by-products, this paper focuses on an entirely new application of fluidized bed combustion fly ash (FBCFA) into Portland composite cements.
It is not currently used because undesirable ettringite, 3CaO·Al2O3·3CaSO4·32H2O, is formed during the hydration of FBCFA.
Although the stability of ettringite has been the subject of much research, the solution is not yet fully clear.
Ettringite is generally considered to be stable up to a temperature of 110°C; however, some investigators claimed that ettringite may already decompose at even ambient temperatures.
To prove these statements, ettringite was prepared by the hydration of ye’elimite, 3CaO·3Al2O3·CaSO4, and the system stored at laboratory temperature in two environments: in laboratory settings and in an environment of saturated water vapour.
The mineralogical composition of ettringite was long term (up to 160 days of hydration) and was analysed by X-ray diffraction (XRD) and differential thermal analysis (DTA).
The hydration of ye’elimite is a relatively complex process.
Only approximately 30% of ettringite was formed under laboratory conditions that appeared to gradually convert into metaettringite.
Within an environment of saturated water vapour, we observed the conversion of ettringite into monosulfate.
Original ye’elimite was indicated as the dominant phase of both storages.
American Psychological Association (APA)
Fridrichová, Marcela& Dvořák, Karel& Gazdič, Dominik& Mokrá, Jana& Kulísek, Karel. 2016. Thermodynamic Stability of Ettringite Formed by Hydration of Ye’elimite Clinker. Advances in Materials Science and Engineering،Vol. 2016, no. 2016, pp.1-7.
https://search.emarefa.net/detail/BIM-1096474
Modern Language Association (MLA)
Fridrichová, Marcela…[et al.]. Thermodynamic Stability of Ettringite Formed by Hydration of Ye’elimite Clinker. Advances in Materials Science and Engineering No. 2016 (2016), pp.1-7.
https://search.emarefa.net/detail/BIM-1096474
American Medical Association (AMA)
Fridrichová, Marcela& Dvořák, Karel& Gazdič, Dominik& Mokrá, Jana& Kulísek, Karel. Thermodynamic Stability of Ettringite Formed by Hydration of Ye’elimite Clinker. Advances in Materials Science and Engineering. 2016. Vol. 2016, no. 2016, pp.1-7.
https://search.emarefa.net/detail/BIM-1096474
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1096474