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Preparation and microstructure of K-PSDS geopolymeric binder
Yunsheng Z.2; Wei S.2; Zongjin L.1
2007-07-20
Source PublicationColloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN09277757
Volume302Issue:1-3Pages:473-482
AbstractIn this paper, a total of nine K-PSDS geopolymeric matrices with different molar ratio of SiO/AlO, KO/AlO, HO/KO is designated to investigate the influence of the three key ratios on mechanical properties and microstructure in accordance with orthogonal design principle. The experimental results show that KO/AlO has the most significant effect on compressive strength amongst the three ratios. The highest compressive strength (20.1 MPa) can be achieved when SiO/AlO = 6.5, KO/AlO = 0.8 and HO/KO = 10.0. Comparing the IR spectra of nine K-PSDS geopolymeric matrices also indicates that geopolymeric matrix with the highest strength is the most fully reacted one and possesses the largest amount of geopolymeric products. Subsequently XRD, ESEM-EDXA and MAS-NMR techniques are employed to further characterize the microstructure of the fully reacted geopolymeric matrix. The microscopic analysis reveals that the fully reacted K-PSDS geopolymeric matrix possesses structural characteristics similar to gel substances in having a wide range of Si endowments, but predominantly the framework molecular chains of Si partially replaced by four-coordinated Al tetrahedral. A 3D molecular structural model is also proposed based on the decomposition of MAS-NMR spectrum of the fully reacted K-PSDS geopolymeric matrix. © 2007 Elsevier B.V. All rights reserved.
KeywordK-PSDS geopolymeric binder Microstructure Preparation
DOI10.1016/j.colsurfa.2007.03.031
URLView the original
Language英語English
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Cited Times [WOS]:26   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Hong Kong University of Science and Technology
2.Southeast University
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GB/T 7714
Yunsheng Z.,Wei S.,Zongjin L.. Preparation and microstructure of K-PSDS geopolymeric binder[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects,2007,302(1-3):473-482.
APA Yunsheng Z.,Wei S.,&Zongjin L..(2007).Preparation and microstructure of K-PSDS geopolymeric binder.Colloids and Surfaces A: Physicochemical and Engineering Aspects,302(1-3),473-482.
MLA Yunsheng Z.,et al."Preparation and microstructure of K-PSDS geopolymeric binder".Colloids and Surfaces A: Physicochemical and Engineering Aspects 302.1-3(2007):473-482.
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