The persistent hydration of lime has severely limited its use as a refractory material. Its hydration is somewhat retarded, but not prevented by heat treatment. A number of investigators have attempted to stabilize lime with chemical additions and have met with limited success. In this investigation an attempt has been made to stabilize lime by introducing a protective coating of glass and by hot pressing to reduce the porosity. Powdered refractory glasses and granular lime were hot pressed in a graphite mold at temperatures ranging from 1250 to 1450°C. The glasses were: 1) calcium-aluminate, 2) alumina-silicate and 3) aluminophosphate. Samples pressed with the alumino-silicate glass showed poor bonding and disintegrated when removed from the mold. Samples made with the calcium-aluminate and the alumino-phosphate glass showed good resistance to hydration when exposed to the atmosphere. Samples pressed with the calcium-aluminate glass at 1450°C withstood immersion in water at room temperature for 72 hours without disintegration.
Proceedings of the Iowa Academy of Science
© Copyright 1964 by the Iowa Academy of Science, Inc.
Long, Stanley A. and McGee, Thomas D.
"Stabilization of Lime with a Protective Glass Coating,"
Proceedings of the Iowa Academy of Science, 71(1), 166-172.
Available at: https://scholarworks.uni.edu/pias/vol71/iss1/26