SEDL / STP / STP603-EB / STP27791S

Effect of Moisture on the Strength Characteristics of Built-Up Roofing Felts

Laaly, HO
Research officer, Building Materials Section, Division of Building Research, National Research Council of Canada, Ottawa, Ont.

Pages: 10    Published: Jan 1976

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Abstract

Stress-strain properties of Type 15 asphalt-saturated, organic, and asbestos felts are compared at room temperature and 50 percent relative humidity. The rate of water sorption by asphalt-saturated organic felt immersed for 520 h in distilled water at room temperature and the effect of moisture on its strength characteristics are assessed. The structure of unsaturated organic felt and the inter-locking characteristics of the fibers were examined by a scanning electron miscroscope.