Accession Number : AD0673705

Title :   USE OF MEMBRANE-FORMING CURING COMPOUNDS ON CONCRETE SURFACES THAT ARE TO BE PAINTED.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Houston,Billy J.

Report Date : JUL 1968

Pagination or Media Count : 46

Abstract : Corps of Engineers 'Standard Practice for Concrete' prohibits use of curing compounds on concrete surfaces that are to be painted. Since substantial savings might be effected on some construction if curing compounds were available that could be painted over, a study was made to learn if there are curing compounds that can be successfully used as a base for paint, and to evaluate any located. A market analysis located six suitable compounds: two chlorinated rubber and epoxy base, two chlorinated rubber and paraffin base, a styrene-butadiene base, and an alkyd-base material. Seven paints were selected for testing with each curing compound: (a) exterior acrylic; (b) exterior polyvinyl acetate; (c) exterior and interior styrene-butadiene-acrylate; (d) exterior and interior epoxy polyamide; (e) interior, first coat latex, second coat alkyd; and (f) interior latex. To test the curing compounds, small concrete panels were coated with each compound; half were painted at 5 days and companion panels were painted at 60 days age; control panels were prepared by painting directly over the panels; test and control panels were exposed to various weathering conditions for 20 months. Results showed that all six curing compounds can be painted with most of the paints with no adverse effect when exposed indoors at moderate temperatures. For outdoors exposure in a moderate climate, painting over the compounds with exterior polyvinyl acetate paint produced a more durable surface than painted concrete. Styrene-butadiene-acrylate paint, however, did not produce as durable a painted surface as concrete. (Author)

Descriptors :   (*CONCRETE, AGING(MATERIALS)), MEMBRANES, SURFACES, PAINTS, EPOXY RESINS, CONSTRUCTION MATERIALS, EXPOSURE(PHYSIOLOGY), WEAR RESISTANCE, ACETAL RESINS, VINYL PLASTICS, INFRARED SPECTROPHOTOMETERS, PANELS, TEST METHODS

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE