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ASTM D5401-93

(Test Method)

Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood (Withdrawn 2002)

Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood (Withdrawn 2002)

SCOPE
1.1 This test method evaluates the effectiveness of clear water repellent coatings on wood before or after exterior exposure.
1.2 Intralaboratory results with this test method can be used to compare the effectiveness of clear water repellent coatings. The agreement between results obtained in different laboratories may be less satisfactory unless a known water repellent is used as a reference.
1.3 This standard does not purport to address all of the safety problems, 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

Status
Historical
Publication Date
31-Dec-1992
Withdrawal Date
09-Oct-2002
ICS
79.040 - Wood, sawlogs and sawn timber
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.42 - Architectural Coatings
Current Stage
Ref Project

Relations

Replaced By
ASTM D5401-03 - Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood
Effective Date
01-Jan-2003

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ASTM D5401-93 - Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood (Withdrawn 2002)ASTM D5401-93 - Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood (Withdrawn 2002)
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ASTM D5401-93 - Standard Test Method for Evaluating Clear Water Repellent Coatings on Wood (Withdrawn 2002)
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Standards Content (Sample)

Designation: D 5401 – 93
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Evaluating Clear Water Repellent Coatings on Wood
This standard is issued under the fixed designation D 5401; 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 water is wiped off, and each are reweighed. The effectiveness
of the water repellent coating is then calculated.
1.1 This test method evaluates the effectiveness of clear
water repellent coatings on wood before or after exterior
5. Significance and Use
exposure.
5.1 Water is known to penetrate wood substrates, causing
1.2 Intralaboratory results with this test method can be used
dimensional instability and eventual deterioration. Clear water
to compare the effectiveness of clear water repellent coatings.
repellent coatings are designed to protect wood from damaging
The agreement between results obtained in different laborato-
effects of water. This test method is used to evaluate the
ries may be less satisfactory unless a known water repellent is
effectiveness of water repellent coatings on wood soon after
used as a reference.
application or after long-term exterior exposure.
1.3 This standard does not purport to address all of the
safety problems, if any, associated with its use. It is the
6. Apparatus
responsibility of the user of this standard to establish appro-
6.1 Conditioning Room or Chamber, having a controlled
priate safety and health practices and determine the applica-
temperature of 73.5 6 3.5°F (23 6 2°C) and a controlled
bility of regulatory limitations prior to use.
relative humidity of 50 6 5 % as described in Specification
D 3924. This is used to establish a uniform moisture content in
2. Referenced Documents
the test specimens and during the test.
2.1 ASTM Standards:
6.2 Balance, accurate to at least 0.1 g.
D 358 Specification for Wood to be Used as Panels in
2 6.3 Saw, sharp, fine-toothed, with a minimum of ten teeth/
Weathering Tests of Coatings
in. to obtain a smooth surface on the test specimen.
D 1006 Practice for Conducting Exterior Exposure Tests of
3
Paints on Wood
7. Reagents and Materials
4
D 1193 Specification for Reagent Water
7.1 Purity of Water—Unless otherwise clearly indicated,
D 3924 Specification for Standard Environment for Condi-
references to water shall be understood to mean reagent water
tioning and Testing Paint, Varnish, Lacquer, and Related
3 as defined by Type IV of Specification D 1193.
Materials
7.2 Wood—Wood used for these tests shall be randomly
selected standard commercial “two-by-fours,” straight-grained,
3. Terminology
knot free, flat-sawn, kiln-dried, Ponderosa pine sapwood,
3.1 Definitions of Terms Specific to This Standard:
selected in accordance with Specification D 358.
3.1.1 clear water repellent coating—a transparent coating
formulated for the purpose of protecting porous substrates by
NOTE 1—Species other than Ponderosa pine may be used by mutual
preventing the penetration of liquid water. agreement.
8. Test Specimens
4. Summary of Test Method
4.1 Five Ponderosa pine specimens are treated with the clear 8.1 Cut away and discard 3 in. (76 mm) of end grain from
the selected “two-by-four” to avoid any pretreatment that may
water repellent under test and allowed to dry for seven days.
Five untreated specimens serve as controls. The treated and have been applied by the supplier and to ensure an even cut on
every specimen.
untreated specimens are each weighed and then allowed to float
in water for 30 min. The specimens are removed, the excess 8.2 Using the fine-toothed saw (see 6.3) to ensure a smooth
surface, cut a supply of 12 in. (305 mm) long test specimens
1 sufficient for the intended test program, with an ample overage
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
to allow for possible discards. Five specimens are required for
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.42 on Architectural Finishes.
each water repellent being tested and five for an untreated
Current edition approved May 15, 1993. Published July 1993.
control set.
2
Annual Book of ASTM Standards, Vol 06.02.
3
8.3 Weigh each specimen to 0.1 g and calculate its mean
Annual Book of ASTM Standards, Vol 06.01.
4
Annual Book of ASTM Standards, Vol 11.01. weight. Discard specimens that vary more than 10 % from the
1

---------------------- Page: 1 ----------------------
D 5401
mean and cut additional specimens as necessary to obtain 11.2 Calculate the mean WRE value for each five-specimen
sufficient specimens within the specified weight range to set.
perform all of the planned tests.
12. Report
8.4
...

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4.1 Computer simulation is known to be a very powerful analytical tool for both practitioners and researchers in the area of wood products and their applications in structural engineering. Complex structural systems can be analyzed by computer with the computer generating the system components, given the probability distribution of each component. Frequently the components are single boards for which a compatible set of strength and stiffness properties are needed. However, the entire structural simulation process is dependent upon the adequacy of the standard uniform number generator required to generate random observations from prescribed probability distribution functions.  
4.2 The technological capabilities and wide availability of microcomputers has encouraged their increased use for simulation studies. Tests of random number generators in commonly available microcomputers have disclosed serious deficiencies (1).3 Adequacy may be a function of intended end-use. This practice is concerned with generation of sets of random numbers, as may be required for simulations of large populations of material properties for simulation of complex structures. For more demanding applications, the use of packaged and pretested random number generators is encouraged.
SCOPE
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