ASTM C672/C672M-98
(Test Method)Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals
Standard Test Method for Scaling Resistance of Concrete Surfaces Exposed to Deicing Chemicals
SCOPE
1.1 This test method covers the determination of the resistance to scaling of a horizontal concrete surface exposed to freezing-and-thawing cycles in the presence of deicing chemicals. It is intended for use in evaluating this surface resistance qualitatively by visual examination.
1.2 The values stated in inch-pound units are to be regarded as the standard.
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.
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: C 672/C 672M – 98
Standard Test Method for
Scaling Resistance of Concrete Surfaces Exposed to
Deicing Chemicals
This standard is issued under the fixed designation C 672/C 672M; 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 mixture proportioning, surface treatment, curing, or other
variables on resistance to scaling.
1.1 This test method covers the determination of the resis-
3.2 This test method is not intended to be used in determin-
tance to scaling of a horizontal concrete surface exposed to
ing the durability of aggregates or other ingredients of the
freezing-and-thawing cycles in the presence of deicing chemi-
concrete.
cals. It is intended for use in evaluating this surface resistance
3.3 No relationship has been established between the frost
qualitatively by visual examination.
immunity of specimens cut from hardened concrete and
1.2 The values stated in either SI units or inch-pound units
specimens prepared in the laboratory.
are to be regarded separately as standard. Within the text, the
inch-pound units are shown in brackets. The values stated in
4. Apparatus
each system are not exact equivalents; therefore, each system
4.1 Freezing Equipment—A chest or room of sufficient size
shall be used independently of the other.
to hold the specimens and capable of lowering the temperature
1.3 This standard does not purport to address all of the
of the specimens to −18 6 3°C [0 6 5°F] within 16 to 18 h and
safety concerns, if any, associated with its use. It is the
maintaining this temperature with a full load of specimens.
responsibility of the user of this standard to establish appro-
4.2 Molds, of the proper size for the test specimens to be
priate safety and health practices and determine the applica-
used, and conforming to the requirements of Practice C 192.
bility of regulatory limitations prior to use.
4.3 Tamping Rod, conforming to the requirements of Test
2. Referenced Documents Method C 143.
4.4 Small Tools—Wood strike-off board, steel trowel, and
2.1 ASTM Standards:
moderately stiff bristle brush suitable for providing the desired
C 143 Test Method for Slump of Hydraulic Cement Con-
2 texture of the test surface.
crete
4.5 Slump Cone, conforming to the requirements of Test
C 156 Test Method for Water Retention by Concrete Curing
2 Method C 143 or Test Method C 231.
Materials
4.6 Air Meter, conforming to the requirements of Test
C 173 Test Method for Air Content of Freshly Mixed
2 Method C 173.
Concrete by the Volumetric Method
4.7 Scales, conforming to the requirements of Practice
C 192/C 192M Practice for Making and Curing Concrete
2 C 192.
Test Specimens in the Laboratory
4.8 Concrete Mixer, conforming to the requirements of
C 231 Test Method for Air Content of Freshly Mixed
2 Practice C 192.
Concrete by the Pressure Method
C 233 Test Method for Air-Entraining Admixtures for Con-
5. Proportioning and Mixing
crete
5.1 Proportioning—The air content, cement factor, slump,
C 511 Specification for Moist Cabinets, Moist Rooms, and
water-to-cement ratio, and other characteristics of the concrete
Water Storage Tanks Used in the Testing of Hydraulic
3 and its ingredients shall be those appropriate for the purposes
Cements and Concretes
for which the tests are to be made. Concrete with the following
3. Significance and Use characteristics has been found useful for the purposes for
which this test method is generally used, such as evaluation of
3.1 This test method can be used to evaluate the effect of
a surface treatment for prevention of scaling: (a) non-air-
entrained; (b) cement content, 335 6 5 kg/m [565 6 10 lb/
This test method is under the jurisdiction of ASTM Committee C-9 on Concrete
yd ]; (c) slump, 75 6 15 mm [3 6 0.5 in.]; and (d) durable
and Concrete Aggregates and is the direct responsibility of Subcommittee C09.67 on
aggregate (Note 1) of 25-mm [1-in.] maximum size. If air-
Resistance of Concrete to Its Environment.
Current edition approved May 10, 1998. Published December 1998. Originally
entrained concrete is to be used for comparative purposes, it
published as C 672 – 71 T. Last previous edition C 672 – 92.
shall have the same proportions as that with which it is being
Annual Book of ASTM Standards, Vol 04.02.
3 compared and the air content shall be 6 6 1 % (Note 2).
Annual Book of ASTM Standards, Vol 04.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 672/C 672M
NOTE 1—Care should be taken to use an aggregate which has a good
compared, maintain the specimens in moist storage until such
performance record in freezing and thawing exposure.
time as the desired strength level has been obtained. When the
NOTE 2—For additional information pertaining to air-entrained con-
desired strength level has been reached, remove the specimens
crete proportions, see Test Method C 233.
from moist storage and store in air for 14 days at 23.0 6 2.0°C
5.2 Mixing and Testing of Freshly Mixed Concrete—
[73.5 6 3.5°F] and 45 to 55 % relative humidity.
Machine mix and test in conformance with the applicable
7.4 For all other concretes, remove the specimens from
provisions of Practice C 192.
moist storage at the age of 14 days and store in air for 14 days
at 23.0 6 2.0°C [73.5 6 3.5°F] and 45 to 55 % relative humid-
6. Specimens
ity.
6.1 Specimens shall have a surface area of at least 0.045
2 2
8. Protective Coatings
m [72 in. ] and be at least 75 mm [3.0 in.] in depth. At least
two duplicate specimens for each combination of variables to
8.1 If protective coatings are to be evaluated, apply them in
be tested shall be made.
accordance with the manufacturer’s recommendations regard-
6.2 Fabrication of Specimens:
ing quantity and method of application at the age of 21 days.
6.2.1 Coat the inside surface of the mold with a light coat of
When a material proposed as dual-purpose curing compound/
mineral oil or a suitable nonreactive release material just prior
protective coating is being evaluated, apply it at the proper
to fabrication of the specimens.
time of application for curing compounds, as described in Test
6.2.2 Fill the mold in one layer. Rod one time for each 1400
Method C 156.
2 2
mm [2 in. ] of surface, leaving a slight excess of material after
NOTE 3—When evaluating penetration-type coatings for application to
the final rodding. Tap the mold to close any voids and spade
pavement surfaces subject to traffic wear, it may be desirable to abrade the
around the periphery with a flat trowel. Level the surface with
treated surface of the test specimens by sufficient wire brushing to break
several passes of a wood strike-off board.
any films
...
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