Effect of welan gum on the hydration and hardening of Portland cement
Article
Article Title | Effect of welan gum on the hydration and hardening of Portland cement |
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ERA Journal ID | 1477 |
Article Category | Article |
Authors | Zhang, Yu (Author), Zhang, Zuhua (Author), Li, Xuerun (Author), Li, Weifeng (Author), Shen, Xiaodong (Author) and Wang, Hao (Author) |
Journal Title | Journal of Thermal Analysis and Calorimetry: an international forum for thermal studies |
Journal Citation | 131 (2), pp. 1277-1286 |
Number of Pages | 10 |
Year | 2018 |
Publisher | Springer |
Place of Publication | Dordrecht, Switzerland |
ISSN | 1388-6150 |
1572-8943 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s10973-017-6589-5 |
Web Address (URL) | https://link.springer.com/article/10.1007/s10973-017-6589-5 |
Abstract | This paper reports the effects of welan gum on the hydration and hardening behaviors of Portland cement (PC) by using X-ray diffractometry, mercury instruction porosimetry, thermogravimetry, differential scanning calorimetry and scanning electron microscopy. Results show that welan gum has notable influence on the setting time of PC paste and the formation of calcium hydroxide (Ca(OH)2); welan gum has little impact on the total hydration heat, AFt content and/or the morphologies of hydration products even though it delays the induction period of hydration and the second reaction of the aluminate phase. Welan gum retards the early hydration of C3S and accelerates the early hydration of C4AF. The compressive strength is improved, and pore size of hardened cement paste is reduced with at the studied period when welan gum is no more than 0.05%. In this research, the cement paste with 0.05% welan gum exhibits the highest long-term (90 d) compressive strength and lowest porosity. |
Keywords | welan gum; hydration; Portland cement; retarding effect; compressive strength |
ANZSRC Field of Research 2020 | 401602. Composite and hybrid materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Nanjing Tech University, China |
Centre for Future Materials | |
Swiss Federal Institute of Technology Lausanne, Switzerland | |
Institution of Origin | University of Southern Queensland |
Funding source | Australian Research Council (ARC) Grant ID DP160104149; DE170101070). |
https://research.usq.edu.au/item/q4zq8/effect-of-welan-gum-on-the-hydration-and-hardening-of-portland-cement
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