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Use of Atlas Test Cells to Assess the Performance of Coatings with Varied Permeance over Concrete Masonry Units (CMU)

Picture for Use of Atlas Test Cells to Assess the Performance of Coatings with Varied Permeance over Concrete Masonry Units (CMU)
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The permeance of coatings applied to the walls of Single Wythe concrete masonry units (CMU) can affect the long-term performance of the coating system, especially after multiple repaints. This paper describes the results of a study to determine if the Atlas Cell Test (NACE TM0174/ASTM C868) can be modified to evaluate the performance of individual coating systems based upon permeance. 

Product Number: 41212-695-SG
Author: Cindy O’Malley, Chuck Duffin, Steve Revnew
Publication Date: 2012
Industry: Coatings
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$20.00
$20.00

The permeance of coatings applied to the walls of Single Wythe concrete masonry units (CMU) can affect the long-term performance of the coating system, especially after multiple repaints. This paper describes the results of a study to determine if the Atlas Cell Test (NACE TM0174/ASTM C868) can be modified to evaluate the performance of individual coating systems based upon permeance. Coating systems with permeance (WVP US perm ratings) from < 10 perms to > 60 perms were used in the research. The goal of the test program is to establish a protocol that can eventually be used to determine the number of times that a given system can be repainted before the reduction in permeance causes concerns with blistering or peeling.

The permeance of coatings applied to the walls of Single Wythe concrete masonry units (CMU) can affect the long-term performance of the coating system, especially after multiple repaints. This paper describes the results of a study to determine if the Atlas Cell Test (NACE TM0174/ASTM C868) can be modified to evaluate the performance of individual coating systems based upon permeance. Coating systems with permeance (WVP US perm ratings) from < 10 perms to > 60 perms were used in the research. The goal of the test program is to establish a protocol that can eventually be used to determine the number of times that a given system can be repainted before the reduction in permeance causes concerns with blistering or peeling.

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