PROPERTIES OF PHOSPHORUS-CONTAINING GEOPOLYMER MATRIX AND FIBER-REINFORCED COMPOSITE

0372237 - ÚFCH JH 2012 RIV US eng C - Conference Paper (international conference)
Bortnovsky, O. - Bezucha, P. - Dědeček, Jiří - Sobalík, Zdeněk - Vodičková, V. - Kroisová, D. - Roubíček, P. - Urbanová, Martina
PROPERTIES OF PHOSPHORUS-CONTAINING GEOPOLYMER MATRIX AND FIBER-REINFORCED COMPOSITE.
MECHANICAL PROPERTIES AND PERFORMANCE OF ENGINEERING CERAMICS AND COMPOSITES IV. Vol. 30. Westerville: Amer. Ceram. Soc, 2010, s. 283-299. Ceramic Engineering and Science Proceedings, Vol. 30. ISBN 978-0-470-45752-8.
[International Conference on Advanced Ceramics and Composites /33./. Dayota Beach (US), 18.01.2009-23.01.2009]
R&D Projects: GA MPO FT-TA4/068
Institutional research plan: CEZ:AV0Z40400503
Keywords : geopolymer matrix * XRD * FTIR ATR
Subject RIV: CF - Physical ; Theoretical Chemistry

In this work properties of geopolymer matrices based on silica fumed prepared with different alumina sources and phosphoric acid were discussed. To evaluate the pot-life of geopolymer resin at room temperature, the viscosity of geopolymer resins was coherently measured. Matrices were analyzed by means of XRD, FTIR ATR, SEM-EDS, (27)Al, (29)Si and (31)P MAS NMR. Thermodimensional stability of fiber-reinforced composites was measured by dilatometry. Water resistance was tested in boiling water; chemical composition and NMR spectra of treated geopolymer matrices were analyzed. The nature of the alumina source influenced the mechanical and thermomechanical properties of the matrix. Although the phosphorus added enhanced the dimensional stability of geopolymer matrix/composites at high temperature, more than 50% of phosphorus was soluble and washed out of the matrix during boiling in water. The rest of phosphorus was probably bound to geopolymer or adhered to silica fumed particles.
Permanent Link: http://hdl.handle.net/11104/0205600