ASTM C1262-05a

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Designation:C1262–05a
Standard Test Method for
Evaluating the Freeze-Thaw Durability of Manufactured
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Concrete Masonry Units and Related Concrete Units
This standard is issued under the fixed designation C 1262; 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* 4.2 The procedure is not intended to provide a quantitative
measure to determine an expected length of service for a
1.1 This test method covers the resistance to freezing and
specific type of concrete unit.
thawing manufactured concrete masonry and related concrete
units. Units are tested in a test solution that is either water or
NOTE 2—The testing laboratory performing this test method should be
3 % saline solution depending on the intended use of the units evaluated in accordance with Practice C 1093.
NOTE 3—Compressive strength and absorption tests should be per-
in actual service.
formed on different but representative specimens. While compressive
NOTE 1—Concrete masonry and related concrete units include units
strength and absorption values by themselves have been shown by
such as hollow and solid concrete masonry units, concrete brick, segmen-
research to not be reliable indicators of durability, they have been shown
tal retaining wall units, concrete pavers, and concrete roof pavers.
to be good reference values for units manufactured from a given set of
materials.
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Freezing-and-Thawing Apparatus:
priate safety and health practices and determine the applica-
5.1.1 In the event that a chamber or chambers are used to
bility of regulatory limitations prior to use.
subject the specimens to the specified freezing or thawing
2. Referenced Documents cycles, or both, the chamber or chambers shall be capable of
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maintaining the air temperature throughout the chamber within
2.1 ASTM Standards:
the specified test ranges when measured at any given time. If
C 140 Test Methods of Sampling and Testing Concrete
the apparatus operates automatically, it must be able to provide
Masonry Units and Related Units
reproducible cycles within the specified temperature require-
C 1093 Practice for the Accreditation of Testing Agencies
ments.
for Unit Masonry
5.1.2 The apparatus includes a non-rigid plastic container
C 1209 Terminology of Concrete Masonry Units and Re-
for each test specimen and test specimen supports as illustrated
lated Units
in Fig. 1. The containers shall be of sufficient size to provide a
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3. Terminology minimum of ⁄8 in. (3 mm) and a maximum of 1 ⁄2 in. (38 mm)
test solution surrounding the specimen.Test specimen supports
3.1 Terminology defined inTerminology C 1209 shall apply
to hold the specimen above the container bottom shall be two
for this test method.
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⁄8 6 ⁄24 in. (3 6 1 mm) rods of a solid noncorrosive,
4. Significance and Use
nonabsorptivematerial(brass,plastic,etc.).Thecontainershall
be flat enough that when the specimen coupon is set on the
4.1 The procedure described in this test method is intended
support rods the specimen shall not deviate from level by more
to determine the effects of freezing and thawing on concrete
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than ⁄16 in. (2 mm) from one end of the specimen to the
units in the presence of water or saline solution.
opposite end.
5.2 Temperature-Measuring Equipment—Thermometers,
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This test method is under the jurisdiction of ASTM Committee C15 on
resistance thermometers, or thermocouples, capable of measur-
Manufactured Masonry Units and is the direct responsibility of Subcommittee
ing the temperature at various points within the test chamber to
C15.03 on Concrete Masonry Units and Related Units.
within 2°F (1°C).
Current edition approved May 15, 2005. Published June 2005. Originally
approved in 1994. Last previous edition approved in 2005 as C 1262–05. 5.3 Scales—Scales for weighing full-size specimens shall
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
have a capacity of at least 50 % greater than the weight of the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
largest specimen tested and shall be accurate to at least 1 g
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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