Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 45: Issue 3
The influence of temperature and different storage conditions on the stability of supersulphated cement
Authors:
T. GroundsUniversity of Hertfordshire School of Natural Sciences AL 10 9AB Hatfield Hertfordshire UK

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D. NowellUniversity of Hertfordshire School of Natural Sciences AL 10 9AB Hatfield Hertfordshire UK

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F. WilburnUniversity of Hertfordshire School of Natural Sciences AL 10 9AB Hatfield Hertfordshire UK

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Pages:
385–394
Online Publication Date:
09 Jan 2007
Publication Date:
01 Sep 1995
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02548772
Keywords:
cement; TG; XRD
Restricted access

Abstract  

The stability of Supersulphated Cement (SSC) is investigated at 95°C when subjected to relative humidities of 100, 53 and 11% of water vapour. Previously [1] investigations at 25, 50, 75°C under the same conditions of humidity reported the stability of ettringite, one of the initial hydration products. At 95°C, decomposition of ettringite, is found at all humidities and is rapid at 100% relative humidity. The hydration products of cement pastes at a water cement ratio of 0.27 were determined by thermogravimetry (TG) and X-ray diffraction (XRD). The formation of the hydragarnet, plazolite is recorded during the decomposition/dehydration process enhanced by possible carbonation. Rehydration studies on the products after storage for up to 9 months were carried out using distilled water and the samples tested for ettringite content. It is concluded that ettringite in SSC is inherently unstable at 95°C.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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