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CAUSES OF POOR SEALANT PERFORMANCE IN SOIL-GAS- RESISTANT FOUNDATIONS
Citation:
Scott, A. CAUSES OF POOR SEALANT PERFORMANCE IN SOIL-GAS- RESISTANT FOUNDATIONS. INDOOR AIR 3(4):376-381, (1993).
Impact/Purpose:
Published Journal Article
Description:
The paper discusses causes of poor sealant performance in soil-gas-resistant foundations. ealants for radon-resistant foundation construction must seal the gap between concrete sections. odern sealants have such low permeability that seal performance depends only on the permeability of the material that contacts the sealant. he surface permeability of concrete walls and floors was measured by a specially designed permeameter, which measures the airflow induced by a pressure difference across a temporary test seal applied to the surface. he permeability of bulk concrete is about 10 to the minus 16th power sq m. Areas free of surface defects had surface permeabilities ranging from 10 to the minus 14th to the minus 16th power sq m. However, surface defects are common on concrete wall surfaces, which increase the permeability to > 10 to the minus 12th power sq m, too high for standard seal designs to be adequate as the only method of soil gas and radon exclusion. adon-resistant seals require either extended contact widths or mechanical removal of the surface layer and defects.
URLs/Downloads:
CAUSES OF POOR SEALANT PERFORMANCE IN SOIL-GAS- RESISTANT FOUNDATIONS (PDF, NA pp, 1918 KB, about PDF)CAUSES OF POOR SEALANT PERFORMANCE IN SOIL-GAS- RESISTANT FOUNDATIONS (ABSTRACT)
