ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 62, (3) 298 - 305 (2018)


THE EFFECT OF CURING TEMPERATURE ON THE PROPERTIES AND STRUCTURE OF GEOPOLYMER COMPOSITE BASED ON POTASSIUM SILICATE AND METAKAOLIN
 
Mašek Zdeněk, Diblíková Linda
 
Výzkumný a zkušební letecký ústav - Composite Technologies department, Beranových 130, 19005 Prague, Czech Republic

Keywords: Geopolymer, Curing, Storage modulus, NMR MAS spectroscopy, X-ray diffraction
 

A carbon fibre/geopolymer composite whose matrix was based on potassium silicate and metakaolin was subjected to different curing temperature modes. The effect of the treatments was evaluated by testing the stiffness and water uptake resistance of the composite. The structure of the composites was analysed by scanning electron microscopy, X-ray diffraction and nuclear magnetic resonance. It was determined that the highest stiffness was achieved by the primary curing at 80 °C. Contrary to this, curing at temperatures higher than 100 °C increased the resistance to water uptake, resulting in smaller decrease in the storage modulus. Structural changes of the geopolymer were linked to the course of the curing temperature mode. Two types of the curing were suggested for the use of the carbon fibre/geopolymer composite in heat stress applications and in a humid environment, respectively.


PDF (1.6 MB)

doi: 10.13168/cs.2018.0025
 
 
Licence Creative Commons © 2015 - 2019
Institute of Rock Structure and Mechanics AS CR, v.v.i. & University of Chemistry and Technology, Prague
Webmaster | Journal Contact