ASTM D6904-03
(Practice)Standard Practice for Resistance to Wind-Driven Rain for Exterior Coatings Applied on Masonry
Standard Practice for Resistance to Wind-Driven Rain for Exterior Coatings Applied on Masonry
SIGNIFICANCE AND USE
This practice is meant to simulate the ability of a coating system applied to a masonry block to withstand exposure to continuous water spray (rain) and a dynamic pressure equivalent to a 98 mph wind velocity without exhibiting water leaks or weight gain, or both.
SCOPE
1.1 This practice is for the evaluation of the ability of coatings to resist the passage of water through masonry block when exposed to water spray and air pressure.
1.2 The values given in inch-pound units are regarded as the preferred unit of measurement. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation:D6904–03
Standard Practice for
Resistance to Wind-Driven Rain for Exterior Coatings
Applied on Masonry
This standard is issued under the fixed designation D 6904; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Significance and Use
1.1 This practice is for the evaluation of the ability of 4.1 Thispracticeismeanttosimulatetheabilityofacoating
coatings to resist the passage of water through masonry block system applied to a masonry block to withstand exposure to
when exposed to water spray and air pressure. continuous water spray (rain) and a dynamic pressure equiva-
1.2 The values given in inch-pound units are regarded as the lent to a 98 mph wind velocity without exhibiting water leaks
preferredunitofmeasurement.Thevaluesgiveninparentheses or weight gain, or both.
are for information only.
5. Apparatus
1.3 This standard does not purport to address all of the
5.1 The testing box is assembled from transparent plastic
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- panels ⁄2-in. thick and typically of the dimensions as shown in
Fig. 1. Three openings on the side, 6 by 12 in., are provided so
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. that the coated side of the three blocks may be positioned for
test. The openings on the top of the apparatus for the air inlet
2. Referenced Documents
and manometer connection shall not be less than 3 in. apart to
2.1 ASTM Standards: make certain that air inlet turbulence will not effect the
D 1475 Test Method for Density of Liquid Coatings, Inks, manometer readings. A spray tube shall be constructed from
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and Related Products ⁄2-in. plastic tubing with three fish-tail nozzles. Attachment to
D 3924 Specification for Standard Environment for Condi- the testing box includes a water-filled U-tube manometer,
tioning and Testing Paint, Varnish, Lacquer, and Related source of compressed air, clamps and angle irons for securely
Materials fastening the test panels to the box, and a drain outlet. Also,
D 3925 Practice for Sampling Liquid Paints and Related illustrated is a simple air pressure regulator consisting of a
Pigmented Coatings T-tube with the leg (foot) of the tube placed in a water filled
2.2 Federal Standard: beakeratadepthofslightlygreaterthan5in.Thissetupisalso
TT-C-555B Coating, Textured (For Interior and Exterior a safety device. Any sudden increase in air pressure will be
Masonry Surfaces) vented harmlessly. The apparatus outlined above was derived
from that shown in Federal Specification TT-C-555B. Appara-
3. Summary of Practice
tus and substrates of other dimensions can be used as agreed
3.1 Typically 8 by 16 by 2 in. masonry blocks are coated upon between manufacturer and supplier. The duration of
with block filler and then coated with the masonry paint and
exposure and water pressure used will also be agreed upon
allowed to cure. The coated blocks are then secured to a test between manufacturer and user.
apparatus and exposed for 24 h to continuous water spray and
6. Reagents and Materials
air pressure or as agreed upon between manufacturer and
supplier. Upon completion of the exposure, the blocks are 6.1 Three 8 by 16 by 2 in. Patio Blocks.
removed, evaluated for visible water leaks or weight gain, or 6.2 Stiff Bristle Brush.
both. 6.3 Mortite or Rubber Gasket, to assure a tight fit of the
patio blocks to the test apparatus.
6.4 Clamps and Angle Irons.
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
6.5 Wind-Driven Rain Apparatus, (an example is shown in
Related Coatings, Materials, and Applications and is the direct responsibility of
Fig. 1).
Subcommittee D01.47 on Concrete, Stone, and Masonry Treatments.
Current edition approved May 10, 2003. Published June 2003.
Annual Book of ASTM Standards, Vol 06.01.
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AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments, Federal Specification TT-C-555B, Amendment No. 1, dated August 5, 1975,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401. U.S. Government Printing Office.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6904–03
FIG. 1 Dimensions of Test Box
NOTE 1—Ablockfillermaynotbesuitablefora
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