Preparation and Properties of Alkali Stimulated Geopolymer and its Application in Thermal Insulation Coating

Abstract:

Geopolymer was prepared by Metakaolin (MK) stimulated by sodium silicate and sodium hydroxide. X-Ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize micro-structure of geopolymer and geopolymer based coating. A serial of reagents were added to modify the coating and a thermal insulation material was produced. It was revealed that MK has quasi-crystal structure and the produced geopolymers had amorphous structure. The surface of geopolymer based coating, as well as the compressive strength, adhesive strength with concrete, could be modified by adding a certain amount of silane coupling agent, mica powders and wollastonite. By mixing the asprepared geopolymer and hollow glass beads with a volume ratio of 4:1, a thermal inslation coating was produced, which had a promising application in the surface protection of hydropower dam.

• Periodical: Advanced Materials Research (Volumes 233-235)
• Pages: 2443-2446
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.233-235.2443
• Online since: May 2011
• Authors: Liang Chen, Wei Han, Zhen Li, Tao Wei, Cheng Jing Xiao
• Keywords: Alkali Stimulated, Coating, Geopolymer, Metakaolin (MK), Thermal Insulation

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