ASTM C1202-05

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Designation:C1202–05
Standard Test Method for
Electrical Indication of Concrete’s Ability to Resist Chloride
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Ion Penetration
This standard is issued under the fixed designation C 1202; 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.
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1. Scope ride Ion Penetration
1.1 This test method covers the determination of the elec-
3. Summary of Test Method
trical conductance of concrete to provide a rapid indication of
3.1 This test method consists of monitoring the amount of
its resistance to the penetration of chloride ions. This test
electrical current passed through 2-in. (51-mm) thick slices of
method is applicable to types of concrete where correlations
4-in. (102-mm) nominal diameter cores or cylinders during a
have been established between this test procedure and long-
6-h period. A potential difference of 60 V dc is maintained
term chloride ponding procedures such as those described in
across the ends of the specimen, one of which is immersed in
AASHTO T 259. Examples of such correlations are discussed
2 a sodium chloride solution, the other in a sodium hydroxide
in Refs 1-5.
solution. The total charge passed, in coulombs, has been found
1.2 The values stated in inch-pound units are to be regarded
to be related to the resistance of the specimen to chloride ion
as the standard, except where SI units are given first followed
penetration.
by inch-pound units in parentheses. The values given in
parentheses are for information only.
4. Significance and Use
1.3 This standard does not purport to address all of the
4.1 This test method covers the laboratory evaluation of the
safety concerns, if any, associated with its use. It is the
electrical conductance of concrete samples to provide a rapid
responsibility of the user of this standard to establish appro-
indication of their resistance to chloride ion penetration. In
priate safety and health practices and determine the applica-
most cases the electrical conductance results have shown good
bility of regulatory limitations prior to use.
correlation with chloride ponding tests, such as AASHTO
T 259, on companion slabs cast from the same concrete
2. Referenced Documents
3 mixtures (Refs 1-5).
2.1 ASTM Standards:
4.2 This test method is suitable for evaluation of materials
C 42/C 42M Test Method for Obtaining and Testing Drilled
and material proportions for design purposes and research and
Cores and Sawed Beams of Concrete
development.
C 192/C 192M Practice for Making and Curing Concrete
4.3 The numerical results (total charge passed, in coulombs)
Test Specimens in the Laboratory
from this test method must be used with caution, especially in
C 670 Practice for Preparing Precision and Bias Statements
applicationssuchasqualitycontrolandacceptancetesting.The
for Test Methods for Construction Materials
qualitative terms in the right-hand column ofTable 1 should be
2.2 AASHTO Standard:
used in most cases.
T 259 Method of Test for Resistance of Concrete to Chlo-
4.4 Care should be taken in interpreting results of this test
when it is used on surface-treated concretes, for example,
concretes treated with penetrating sealers.The results from this
test on some such concretes indicate low resistance to chloride
ion penetration, while 90-day chloride ponding tests on com-
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This test method is under the jurisdiction of ASTM Committee C09 on panion slabs show a higher resistance.
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
4.5 The details of the test method apply to 4-in. (102-mm)
C09.66 on Concrete’s Resistance to Fluid Penetration.
nominal diameter specimens. This includes specimens with
Current edition approved July 1, 2005. Published August 2005. Originally
actual diameters ranging from 3.75 in. (95 mm) to 4.0 in. (102
approved in 1991. Last previous edition approved in 1997 as C 1202 – 97.
2
The boldface numbers in parentheses refer to the list of references at the end of
this standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Methods of Sampling and Testing, 1986, American Association of State
Standards volume information, refer to the standard’s Document Summary page on Highway and Transportation Officials, 444 N. Capitol St., NW, Washington, DC
the ASTM website. 20001.
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C1202–05
TABLE 1 Chloride Ion Penetrability Based on Charge Passed
5. Interfe
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