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Abstract
Moisture vapor suppression coatings are used on millions of square feet of concrete floor slabs to remediate distress of moisture-sensitive floor coverings. The authors evaluated the suitability of ASTM E96 and ASTM D1653 for assessing performance of these coatings. ASTM E96 can take several months, whereas free films can be evaluated using D1643 in one to two weeks. Both methods were in close agreement for 100% solids epoxy coatings but differ considerable for water-based coatings. Several types of coatings became severely distorted during D1653 testing and could not provide useful results, including cementitious and polymer latexes and urethanes. Repeatability for coated and uncoated concrete specimens using ASTM E96 was comparable to published precision data and for other materials. The authors recommend that water vapor transmission testing of concrete and coated concrete specimens be included in the scope of ASTM E96.
Moisture vapor suppression coatings are used on millions of square feet of concrete floor slabs to remediate distress of moisture-sensitive floor coverings. The authors evaluated the suitability of ASTM E96 and ASTM D1653 for assessing performance of these coatings. ASTM E96 can take several months, whereas free films can be evaluated using D1643 in one to two weeks. Both methods were in close agreement for 100% solids epoxy coatings but differ considerable for water-based coatings. Several types of coatings became severely distorted during D1653 testing and could not provide useful results, including cementitious and polymer latexes and urethanes. Repeatability for coated and uncoated concrete specimens using ASTM E96 was comparable to published precision data and for other materials. The authors recommend that water vapor transmission testing of concrete and coated concrete specimens be included in the scope of ASTM E96.
Date
0/2006
0/2006
Author(s)
Meggan King; Howard Kanare
Meggan King; Howard Kanare
Page(s)
Keyword(s)
coating; epoxy; permeance; concrete; water vapor; sealant; film
coating; epoxy; permeance; concrete; water vapor; sealant; film