Journal
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 8, Issue 3, Pages 2747-2752Publisher
ELSEVIER
DOI: 10.1016/j.jmrt.2019.03.010
Keywords
Metakaolin geopolymer; Microstructure; Marine environment; NMR spectra
Funding
- Consejo Nacional de Ciencia y Tecnologia (CONACyT) of Mexico [270186]
- Natural Science Foundation of Hubei Province of China [2016CFA013]
- Wuhan Science and Technology Bureau of China [2016070204020156]
- CONACyT [831134]
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In this research, metakaolin-based geopolymers were synthesized to study their deterioration in marine environment. The geopolymers were exposed in air, seawater, dry-wet and heat-cool cycles of seawater for 30, 60 and 90 days. The mechanical property of the geopolymers was characterized through compressive strength measurements, and their microstructures were measured by X-ray diffraction (XRD), scanning electron microscope (SEM) and nuclear magnetic resonance (NMR) apparatus. It was found that seawater environment inhibited the geopolymerization reactions, so that a low amount of tetrahedral silicon of Q(4)(4Al), Q(4)(3Al) and Q(4)(2Al) were formed. (C) 2019 The Authors. Published by Elsevier B.V.
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