Thermal properties of spray-coated geopolymer-type compositions
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Thermal properties (DTA-TG and thermal expansion) of spray-coated fly ash-based geopolymer have been studied. The geopolymer composition selected for thermal spray coating had Si:Al = 3.3 and Na:Al = 1.45. To improve the fire resistant characteristics, fine- and coarse-milled vermiculite powder was added at 10 mass percent. Water:geopolymer ratios varied from 0.35 to 0.41 depending on vermiculite content and method of coating. Water added into a starting mixture to increase the flowability also decreased the geopolymerisation reaction.
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Temuujin, Jadambaa; Rickard, William; Lee, Melissa; van Riessen, Arie (2011)Geopolymer-type coatings prepared by using an industrially available sodium silicate solution (SiO2:Na2O=3.1) and metakaolin were applied to steel substrates. The coatings exhibited excellent adhesion to steel substrates ...
Temuujin, Jadambaa; Minjigmaa, A.; Rickard, William; Lee, Melissa; Williams, Iestyn; Van Riessen, Arie (2010)Class F fly ash based Na-geopolymer formulations have been applied as fire resistant coatings on steel.The main variables for the coating formulations were Si: Al molar and water: cement weight ratios. Wehave determined ...
Vickers, Les; Rickard, William D.A.; van Riessen, Arie (2014)Strategies to control thermally induced shrinkage in fly ash based geopolymers are investigated. The useof low (<2) Si:Al ratios in the geopolymer provides superior thermal properties and the addition of fillers delivered ...