THE SORPTION OF WATER BY ASBESTOS FIBRE

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Abstract
The sorption of water by asbestos fibre has been examined using two modifications of the static method. In the first method the sample was weighed in the absence of air by a quartz spring balance, after which the required vapor pressure of water was admitted. In the second method the samples were weighed in air in a room the temperature and humidity of which were controlled. The two methods have given identical results, producing the sigmoid isotherm similar to those found in the cases of cotton and wood, and exhibiting a marked inflexion in the region of the saturation point. The rate of sorption has been examined using the sorption balance and it has been shown that at humidities below 70% equilibrium is established in a few minutes; at higher humidities longer time is required. Because of this and other reasons it is suggested that in this region capillary condensation is taking place.

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