Publication: Mechanical properties, microstructure and drying shrinkage of hybrid fly ash-basalt fiber geopolymer paste
Issued Date
2018-10-20
Resource Type
ISSN
09500618
Other identifier(s)
2-s2.0-85050151284
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Mahidol University
Rights Holder(s)
SCOPUS/ Elsevier
Bibliographic Citation
Construction and Building Materials. Vol.186, (2018), 62-70
Suggested Citation
Wonsiri Punurai, Wunchock Kroehong, Adam Saptamongkol, Prinya Chindaprasirt Mechanical properties, microstructure and drying shrinkage of hybrid fly ash-basalt fiber geopolymer paste. Construction and Building Materials. Vol.186, (2018), 62-70. doi:10.1016/j.conbuildmat.2018.07.115 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/45787
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Title
Mechanical properties, microstructure and drying shrinkage of hybrid fly ash-basalt fiber geopolymer paste
Other Contributor(s)
Mahidol University. Faculty of Engineering. Department of Civil and Environmental Engineering
Rajamangala University of Technology Tawan-ok. Faculty of Engineering and Architecture. Uthenthawai Campus. Department of Civil Engineering
Khon Kaen University. Faculty of Engineering. Sustainable Infrastructure Research and Development Center
Rajamangala University of Technology Tawan-ok. Faculty of Engineering and Architecture. Uthenthawai Campus. Department of Civil Engineering
Khon Kaen University. Faculty of Engineering. Sustainable Infrastructure Research and Development Center
Abstract
© 2018 Elsevier Ltd This paper evaluates the mechanical properties, microstructure and drying shrinkage of hybrid fly ash-basalt fiber geopolymer paste. Fly ash was replaced with basalt fiber at the replacement levels of 0, 10, 20, 30, 40 and 100%. Na2SiO3/NaOH ratio of 1.0 and liquid to binder (L/B) ratio of 0.60 were used for making geopolymer pastes. Setting time, strength and drying shrinkage of geopolymer pastes were tested. The results showed that the replacement of fly ash with basalt fibers in geopolymer pastes resulted in increased setting times and strength and reduced drying shrinkage of paste. The basalt fiber acted as small reinforcing fibers and enhanced the development of CSH, CASH and NASH which further enhanced the properties of paste. In addition, the total porosity and critical pore size of fly ash geopolymer paste reduce with increasing replacement content in fly ash which makes the paste more homogeneous and dense compared to fly ash geopolymer.
Sponsorship
Faculty of Engineering and Architecture, Uthenthawai Campus, Rajamangala
University of Technology, Tawan-ok / Thailand
Research Fund (TRF) for financial support under the New
Researcher Scholar, Grant No. TRG 5880064. / Faculty of Engineering, Mahidol University