1、Designation:C120217Standard Test Method forElectrical Indication of Concretes Ability to Resist ChlorideIon Penetration1This standard is issued under the fixed designation C1202;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the yea
2、r of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the determination of the elec-trical conductance of concrete to provide a rapid indication of
3、its resistance to the penetration of chloride ions.This testmethod is applicable to types of concrete where correlationshave been established between this test procedure and long-term chloride ponding procedures such as those described inAASHTO T 259.Examples of such correlations are discussedin Ref
4、s 1-5.21.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not b
5、e consideredas requirements of the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory
6、 limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organiza
7、tion TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3C31/C31M Practice for Making and Curing Concrete TestSpecimens in the FieldC42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC192/C192M Practice for Making and Curing Concrete
8、 TestSpecimens in the LaboratoryC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction Materials2.2 AASHTO Standard:T 259 Method of Test for Resistance of Concrete to Chlo-ride Ion Penetration43.Summary of Test Method3.1 This test method consists of monitoring the
9、 amount ofelectrical current passed through 50-mm thick slices of100-mm nominal diameter cores or cylinders during a 6-hperiod.A potential difference of 60 V dc is maintained acrossthe ends of the specimen,one of which is immersed in asodium chloride solution,the other in a sodium hydroxidesolution.
10、The total charge passed,in coulombs,has been foundto be related to the resistance of the specimen to chloride ionpenetration.4.Significance and Use4.1 This test method covers the laboratory evaluation of theelectrical conductance of concrete samples to provide a rapidindication of their resistance t
11、o chloride ion penetration.Inmost cases the electrical conductance results have shown goodcorrelation with chloride ponding tests,such as AASHTOT259,on companion slabs cast from the same concretemixtures(Refs 1-5).4.2 This test method is suitable for evaluation of materialsand material proportions f
12、or design purposes and research anddevelopment.4.3 Sample age has significant effects on the test results,depending on the type of concrete and the curing procedure.Most concretes,if properly cured,become progressively andsignificantly less permeable with time.1This test method is under the jurisdic
13、tion of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.66 on Concretes Resistance to Fluid Penetration.Current edition approved June 15,2017.Published July 2017.Originallyapproved in 1991.Last previous edition approved in 2012 as C1202 12.DO
14、I:10.1520/C1202-17.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the st
15、andards Document Summary page onthe ASTM website.4Methods of Sampling and Testing,1986,American Association of StateHighway and Transportation Officials,444 N.Capitol St.,NW,Washington,DC20001.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harb
16、or Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.4 This test method was developed originally for evalua-tions of alternative materials,but in practice its use has ev
