Effects of modulus of sodium silicate solution on mechanical properties and microstructure of geopolymer
Article
Article Title | Effects of modulus of sodium silicate solution on mechanical properties and microstructure of geopolymer |
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Article Category | Article |
Authors | Zhang, Zuhua (Author), Yao, Xiao (Author) and Zhu, Huajun (Author) |
Journal Title | Journal of Nanjing University of Technology |
Journal Citation | 2011 (01), pp. 52-56 |
Number of Pages | 5 |
Year | 2011 |
Place of Publication | Nanjing, China |
Digital Object Identifier (DOI) | https://doi.org/10.3969/j.issn.1671-7627.2011.01.011 |
Abstract | Four sodium silicate solutions of modulus m = 1.0, 1.2, 1.4 and 1.6 were prepared as activators used in metakaolin-based geopolymer synthesis. The effects of modulus of activator on the mechanical properties and microstructure of the geopolymers were studied by strength test, infrared analysis (IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Results showed that the most SiO 4 tetrahedrals were in low poly-degree status when the modulus varied from 1.0 to 1.6. Compressive strength and flexural strength increased with the curing time. The geopolymer of m = 1.2 achieved the highest compressive strength at 28d (74.6MPa) and its flexural strength was 11.2 MPa. The mineral composition of 4 geopolymers was similarly amorphous, and composed of geopolymeric gels and residual raw particles, while the microstructure of the geopolymer of m = 1.2 was the smoothest one. |
Keywords | geopolymer; sodium silicate; modulus; mechanical properties; microstructure |
ANZSRC Field of Research 2020 | 400505. Construction materials |
401609. Polymers and plastics | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source. |
Byline Affiliations | Nanjing University of Technology, China |
Yancheng Institute of Technology, China | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q286q/effects-of-modulus-of-sodium-silicate-solution-on-mechanical-properties-and-microstructure-of-geopolymer
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