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Abstract:This research project was undertaken to evaluate several coating systems for concrete masonry to replace the presently used Class 2 rubbed finish. This is the report of Phase II, the field evaluation, of that project.
In early October 1970, application of the five coating systems to an elevated structure in the Baton Rouge area was began. This project was completed later the same month and has been under observation for a period of one year.
The principal conclusion reached from this study is that the systems, as they are presently applied, are acceptable as a replacement for the Class 2 rubbed finish. It should be noted that the mixture in System C, which proved to be unsatisfactory under testing in Phase I, was changed by the manufacturer, and the revised System C appears to be performing as satisfactory as the four other systems.
The commendations are as follow: 1) that the five systems, as described herein be placed on an approved produces list and used as alternates to a Class 2 rubbed finish; 2) that the present specifications be expanded to allow for a Class 2 B special coated finish and; 3) that the Department may specify a Class 2B special coated finish for which no alternate may be substituted.
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