AM-S19-39 A hydroceramic is a monolithic solid produced by a hydration driven reaction that occurs after mixing metakaolin with concentrated NaOH solution. The chemistry of the starting materials is optimized to encourage the formation of tectosilicates (zeolites, feldspathoids) during curing. Furthermore, the process is forgiving enough so that a variety of caustic waste streams can be accommo...

-The reaction of kaolin with NaC1 was followed by dynamic thermal analysis and mass spectrometry under/'42, CO2, and air atmospheres and in a 10-5-torr vacuum. The weight loss was a function of the atmosphere used and, according to mass spectrometry, was due to the evolution of H20, HC1, and very small amounts of H2. HC1 was formed only after the release of 85% of the hydroxyl content of the ka...