Abstract
We present experimental results on the irreversible moisture expansion of the Spanish structural ceramics. Twenty representative commercial products have been analysed. The results of three of the tests applied are presented: long-term natural expansion tests (carried out during a time span of two years), accelerated autoclave (at 10 atm) and boiling water tests. The data are used to determine the magnitude of the expansion and the behaviour of ceramics with different compositions. Correlation among various natural expansion tests and accelerated tests are studied. The reliability of the accelerated tests as a measure of the moisture expansion is discussed. The experimental set-up and the accuracy of the data are described.
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