Welan gum retards the hydration of calcium sulfoaluminate
Article
| Article Title | Welan gum retards the hydration of calcium sulfoaluminate |
|---|---|
| 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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