NDLI: Effect of calcium addition at high temperature on fly ash's activation character

Content Provider	IEEE Xplore Digital Library
Author	Luo Zhongtao Zhang Lei Yang Jiujun Wang Kai
Copyright Year	2011
Description	Author affiliation: Shool of civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China (Wang Kai) \|\| Department of Materials Engineering, Tianjin Institute of Urban Construction, 30038, China (Zhang Lei; Yang Jiujun) \|\| School of Materials Science and Engineering, Zhengzhou University, 450052, China (Luo Zhongtao)
Abstract	The surface network structure of fly ash modified by calcium addition at high-temperature was analyzed by NMR, and Ka method- (ICP-AES) rapid evaluation was used too. By activity exhibition of modified fly ash in cement paste, the effect of calcium addition course at high-temperature on fly ash's activity characteristics was studied. The results indicate: modified by calcium addition at high-temperature, fly ash's early Ka value improvement, and ratio of activated Al2O3/SiO2 was more than twice the average ratio of original fly ash, indicating the calcium addition course at high-temperature was not only destructive on Si-O bond, its destructive power on Al-O bond was also more apparent. Under the environment of cement paste, modified fly ash's reaction took place rapidly at early stage of cement hydration, and continually to consume Ca(OH)2 produced by cement hydration.
Starting Page	5896
Ending Page	5899
File Size	418636
Page Count	4
File Format	PDF
ISBN	9781457702891
e-ISBN	9781457702907
DOI	10.1109/ICETCE.2011.5774525
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Depolymerization Fly ash X-ray scattering Calcium Calcium addition Activity characteristics Concrete Nuclear magnetic resonance Aluminum oxide
Content Type	Text
Resource Type	Article

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