ASTM D6532-00

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Designation:D6532–00
Standard Test Method for
Evaluation of the Effect of Clear Water Repellent Treatments
on Water Absorption of Hydraulic Cement Mortar
Specimens
This standard is issued under the fixed designation D 6532; 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 3. Terminology
1.1 This test method evaluates the effectiveness of clear 3.1 Definitions of Terms Specific to This Standard:
water repellents on hydraulic cement mortar specimens based 3.1.1 clear water repellent—a coating formulated for the
on water absorption after a water soak. purpose of protecting porous substrates by reducing the pen-
1.2 The values stated in SI units are to be regarded as the etration of liquid water.
standard. The values given in parentheses are for information
4. Summary of Test Method
only.
1.3 This standard does not purport to address all of the 4.1 The masonry unit is immersed in a clear water repellent,
removed and allowed to cure at ambient condition for 7 days.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- Any deviations should be noted in 10.1.2. After cure, the
masonry unit is weighed and placed in water to a depth of 6.3
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. mm ( ⁄4 in.) for 3 days. After the immersion period, the
masonry unit is removed and reweighed. The water repellency
2. Referenced Documents
value of the treatment is then calculated using a comparison to
2.1 ASTM Standards: untreated control specimens.
C 109 Test Method for Compressive Strength of Hydraulic
5. Significance and Use
Cement Mortars
5.1 Siliceousalkalinesubstratesaresubjecttowaterdamage
D 1475 Test Method for Density of Liquid Coatings, Inks,
that may result in deterioration. Water repellents can provide
and Related Products
D 3924 Specification for Standard Environment for Condi- protection of siliceous alkaline substrates exposed to water.
This test method is used to evaluate the efficacy of clear water
tioning and Test Paint, Varnish, Lacquer and Related
Materials repellents on alkaline substrates.
E 145 Specification for Gravity Convention and Force Ven-
6. Apparatus
tilation Ovens
6.1 Forced Draft Oven, Type 1B, in accordance with the
Type Section of Specification E 145.
1 6.2 Balance, having a capacity of not less than 400 g, and
This test method is under the jurisdiction of ASTM Committee D01 on Paint
sensitivity of 0.01 g.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.47 on Masonry Treatments.
6.3 Reservoir Water Pan, capable of maintaining the water
Current edition approved April 10, 2000. Published June 2000.
level at 6.3 mm ( ⁄4 in.) in depth with noncorroding rods for the
Annual Book of ASTM Standards, Vol 04.01.
specimens to sit off the bottom.
Annual Book of ASTM Standards, Vol 06.01.
Annual Book of ASTM Standards, Vol 14.04. 6.4 Stiff Bristle Brush, to brush the masonry units.
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D6532–00
6.5 Pressurized Air Source, to blow residual material off the temperatureandhumidity,asspecifiedinSpecificationD 3924,
brushed masonry units. for 7 days to ensure a constant weight is reached. If laboratory
6.6 Stopwatch. conditions are different than those specified, ensure laboratory
conditions are constant and record laboratory conditions every
7. Reagents and Materials
day throughout test period and report in 10.1.2.
7.1 Masonry Units, 51 by 51 by 51 mm (2 by 2 by 2 in.)
8.8 After 6 days, weigh cubes to nearest 0.1 g. Allow one
masonryunitspreparedinaccordancewithproceduresoutlined
more day to cure and weigh again. Compare weights at Day 6
inTest Method C 109 with the form release oil removed can be
and Day 7 to ensure that a constant weight is reached. If a
used.
constant weight is not reached, repeat every day until a
constant weight is reached. A constant weight at standard
8. Procedure
conditions shall be assumed when the specimen weighed to the
8.1 Select substrates needed, brush, and blow off dust with
nearest 0.1 g loses not more than 0.2 % in any 24-h period.
pressurized air. The specimens must be free of loose material
8.9 Record weight of dry treated specimens as W and dry
td
that may be lost and alter the weight.They also must be free of
untreated specimens as W . Place specimens in the water
d
material that will alter the absorption characteristics.
reservoir, top face up, on noncorroding rods or any method that
8.2 Label each piece. Run triplicate samples for each water
allows the specimens to sit off the bottom of the pan and be in
repellent treatment. Also include three untreated control
contact with the water on all sides. The water level in the
samples for each series. All specimens in one series of testi
...