Thermal analyses

Cellulose ethers are universally applied in gypsum-based industry productions though little research has been done about cellulose ethers effects on gypsum mortar properties on hydration. This study investigated the effect of addition of hydroxypropyl methylcellulose, hydroxyethyl cellulose and hydr...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2017-09, Vol.129 (3), p.1547-1554
Main Authors: Zhi, Zhenzhen, Ma, Baoguo, Jian, Shouwei, Guo, Yanfei, Yu, Houliang, Tan, Hongbo, Chen, Fangjie
Format: Article
Language:English
Subjects:
Acquisitions & mergers
Air bubbles
Bubbles
Cellulose
Cellulose ethers
Chemical industry
Compressive strength
Ethers
Gypsum
Hydration
Hydroxyethyl celluloses
Methyl cellulose
Retarding
Setting (hardening)
Slurries
Thermal analysis
Time compression
Water loss
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Summary:Cellulose ethers are universally applied in gypsum-based industry productions though little research has been done about cellulose ethers effects on gypsum mortar properties on hydration. This study investigated the effect of addition of hydroxypropyl methylcellulose, hydroxyethyl cellulose and hydroxyethyl methyl cellulose on the hydration heat, thermal analysis, setting time and compressive strength of alpha hemihydrate gypsum ([alpha]-HH). The results showed that cellulose ethers had certain effect on high-strength gypsum. The addition of cellulose ethers results in retarding the hydration process, accelerating the rate of water loss in thermal analysis, shortening initial setting time and reducing compressive strength. However, the hydration of [alpha]-HH is improved, the same as the properties of hardened gypsum products. It was suggested that the effect of cellulose ethers is attributed to that cellulose ethers adsorbed on the gypsum surface. Therefore, air bubbles are entrapped into the gypsum slurry and microstructures of gypsum crystals are improved.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-017-6347-8