Welan gum retards the hydration of calcium sulfoaluminate
Article
Article Title | Welan gum retards the hydration of calcium sulfoaluminate |
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ERA Journal ID | 1477 |
Article Category | Article |
Authors | Zhang, Yu (Author), Zhang, Zuhua (Author), Li, Weifeng (Author), Wang, Hao (Author) and Shen, Xiaodong (Author) |
Journal Title | Journal of Thermal Analysis and Calorimetry: an international forum for thermal studies |
Journal Citation | 130 (2), pp. 899-908 |
Number of Pages | 10 |
Year | 2017 |
Publisher | Springer |
Place of Publication | Hungary |
ISSN | 1388-6150 |
1572-8943 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s10973-017-6427-9 |
Web Address (URL) | https://link.springer.com/article/10.1007/s10973-017-6427-9 |
Abstract | This paper illustrates the retarding effects of welan gum on the hydration of C4A3$ both in the absence and presence of gypsum. By using the methods of isothermal calorimetry, X-ray diffractometry, mercury instruction porosimetry, thermogravimetry and scanning electron microscopy, it reveals that the hydration of C4A3$ is significantly retarded and reduced in the presence of welan gum, while the total hydration heat of C4A3$ is reduced with the rise of dose of welan gum. The retarding effect of welan gum on the hydration of C4A3$ in the absence of gypsum is much stronger than that in the presence of gypsum. The hydration product of AFm is AFm-12 at curing time longer than 1 d at the w/c ratio of 1. As a whole, welan gum will not affect the composition of hydration products of C4A3$, even though the AFm phase grains grown well and are better shaped with addition of 0.50% welan gum. |
Keywords | Hydration heat; Micrograph; Monosulfate (AFm); Retarding effect; Welan gum |
ANZSRC Field of Research 2020 | 400505. Construction materials |
Byline Affiliations | Nanjing Tech University, China |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6zxy/welan-gum-retards-the-hydration-of-calcium-sulfoaluminate
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