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Influence of fly ash on compressive strength and micro-characteristics of magnesium potassium phosphate cement mortars
Xu, Biwan1,2; Ma, Hongyan3; Shao, Hongyu1; Li, Zongjin1,4; Lothenbach, Barbara2
2017-09
Source PublicationCEMENT AND CONCRETE RESEARCH
ISSN0008-8846
Volume99Pages:86-94
Abstract

Although the reactivity of fly ash (FA) in magnesium potassium phosphate cement (MKPC) systems is still unclear, it has been generally treated as an inert filler in the mix designs of FA/MKPC-based materials. In this study, FA was incorporated in MKPC mortars through two different design methods, where FA was either treated as inert or reactive. Fresh performance, compressive strength and micro-characteristics of the FA/MKPC mortars were systematically evaluated. The experimental results show that the design method where FA was treated as reactive can lead to better fresh performance, better optimized microstructure and higher mechanical strengths. The SEM analysis indicates some reaction of the FA particles within the MKPC mortars; however, the detailed compositions of the formed secondary reaction products could not be directly determined by either XRD or TGA analysis. Furthermore, this study underlines the importance of two ratios, R-Magnesia:FA and RKDP:(Magnesia + FA), in optimum designs of FA/MKPC-based materials.

KeywordMagnesium Potassium Phosphate Cement Fly Ash Compressive Strength Micro-characteristics Reactivity
DOI10.1016/j.cemconres.2017.05.008
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaConstruction & Building Technology ; Materials Science
WOS SubjectConstruction & Building Technology ; Materials Science, Multidisciplinary
WOS IDWOS:000403634900009
PublisherPERGAMON-ELSEVIER SCIENCE LTD
The Source to ArticleWOS
Scopus ID2-s2.0-85019073322
Fulltext Access
FWCI4.539231
Citation statistics
Cited Times [WOS]:108   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorXu, Biwan
Affiliation1.Department of Civil and Environmental Engineering, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
2.Empa, Swiss Federal Institute for Material Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
3.Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO, USA
4.Institute of Applied Physics and Materials Engineering, University of Macau, Macau
First Author AffilicationFaculty of Education
Corresponding Author AffilicationFaculty of Education
Recommended Citation
GB/T 7714
Xu, Biwan,Ma, Hongyan,Shao, Hongyu,et al. Influence of fly ash on compressive strength and micro-characteristics of magnesium potassium phosphate cement mortars[J]. CEMENT AND CONCRETE RESEARCH,2017,99:86-94.
APA Xu, Biwan,Ma, Hongyan,Shao, Hongyu,Li, Zongjin,&Lothenbach, Barbara.(2017).Influence of fly ash on compressive strength and micro-characteristics of magnesium potassium phosphate cement mortars.CEMENT AND CONCRETE RESEARCH,99,86-94.
MLA Xu, Biwan,et al."Influence of fly ash on compressive strength and micro-characteristics of magnesium potassium phosphate cement mortars".CEMENT AND CONCRETE RESEARCH 99(2017):86-94.
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