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Preparation of metakaolin based geopolymer and its three-dimensional pore structural characterization
Zhang Y.2; Zhang W.2; Sun W.2; Li Z.1; Liu Z.2
2015-06-22
Source PublicationJournal Wuhan University of Technology, Materials Science Edition
ISSN10002413
Volume30Issue:3Pages:550-555
AbstractThree types of pure geopolymer pastes (poly-sialate PS, poly-sialate-siloxo PSS, and poly-sialate-siloxo PSDS) were first prepared by alkali (NaOH and KOH) activated metakaolin. Then a void space network was employed to simulate the 3-D pore-throat distribution across the unit cell of the various hardened geopolymer pastes with reference to their experimental mercury intrusion curves. Based on the simulated 3-D pore-throat structure models, a wide range of pore-level properties such as porosity, connectivity, permeability and tortuosity of various geopolymer pastes were calculated. The 3-D structural model and calculated parameters showed that most of the pores in Na-PS geopolymer paste was very small size pores ranging from 0 to 100 nm. A few very large pores were spread amongst the small pores, resulting in a very high penetration pressure, permeability resistance. Unlike Na-PS geopolymer paste, pore size with medium size of Na-PSS, K-PS and K-PSS geopolymer pastes distributed uniformly across the unit cell, and the size changes of adjacent pores in the 3 geopolymer pastes were little, producing higher penetration pressure, lower permeability, smaller connectivity and larger tortuosity. In contrast, pores in Na-PSDS and K-PSDS geopolymer pastes were relatively large and distributed concentratively, which caused samples to be easily penetrated by mercury, methane and nitrogen etc under relatively low pressures.
Keywordpolymer porosity simulation
DOI10.1007/s11595-015-1187-5
URLView the original
Language英語
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hong Kong University of Science and Technology
2.Southeast University
Recommended Citation
GB/T 7714
Zhang Y.,Zhang W.,Sun W.,et al. Preparation of metakaolin based geopolymer and its three-dimensional pore structural characterization[J]. Journal Wuhan University of Technology, Materials Science Edition,2015,30(3):550-555.
APA Zhang Y.,Zhang W.,Sun W.,Li Z.,&Liu Z..(2015).Preparation of metakaolin based geopolymer and its three-dimensional pore structural characterization.Journal Wuhan University of Technology, Materials Science Edition,30(3),550-555.
MLA Zhang Y.,et al."Preparation of metakaolin based geopolymer and its three-dimensional pore structural characterization".Journal Wuhan University of Technology, Materials Science Edition 30.3(2015):550-555.
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