Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 107, Issue 1, Pages 287-292Publisher
SPRINGER
DOI: 10.1007/s10973-011-1766-4
Keywords
Geopolymer; Thermal properties; Fly ash; Fire resistant coatings
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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 flow ability also decreased the geopolymerisation reaction.
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