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High-calcium fly ash recovery from wet-stored condition and its properties
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Document Title
High-calcium fly ash recovery from wet-stored condition and its properties
Author
Tepsri P., Chumphu A., Yoriya S.
Name from Authors Collection
Scopus Author ID
57203874175
Scopus Author ID
56938889300
Affiliations
National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park, Pahonyothin Rd., Khlong 1, Khlong Luang, Pathum Thani 12120, Thailand
Type
Article
Source Title
Materials Research Express
ISSN
20531591
Year
2018
Volume
5
Issue
11
Open Access
All Open Access, Hybrid Gold
Publisher
Institute of Physics Publishing
DOI
10.1088/2053-1591/aadd2a
Format
Abstract
Fly ash can undergo changes in its properties during the wet-stored conditions, leading to reactivity variability consequently affecting its potential applications. Evaluation of the material properties is considerably essential. This work reports on an investigation of changes in physical and chemical properties of high calcium fly ash after recovering from the wet-stored conditions. Herein the high calcium lignite fly ash with calcium oxide constituent in a range of 20%-30% is the focus of this study. Important characteristics of fly ash have been studied, including physical properties, morphologies, chemical composition, and crystallographic phase transformation. Relation of oxide composition including silica, alumina, ferric oxide, and sulfur trioxide, to wet-storing period has been established to visualize the effect of short-term storage in water on changes in the content of mineral bearing species in fly ash. The strength activity indices of the recovered fly ash samples cured for 7 and 28 days has been presented. The significant amount of free lime and soluble calcium, aluminum, and sulfur-bearing minerals varying with storage times are believed to play their pronounced role governing compressive strength. © 2018 IOP Publishing Ltd.
Keyword
cement application | fly ash | high CaO | recovery | strength activity index | wet-stored
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
National Metal and Materials Technology Center
License
N/A
Rights
N/A
Publication Source
Scopus