1、Designation:C666/C666M15Standard Test Method forResistance of Concrete to Rapid Freezing and Thawing1This standard is issued under the fixed designation C666/C666M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers the determination of
3、the resis-tance of concrete specimens to rapidly repeated cycles offreezing and thawing in the laboratory by two differentprocedures:Procedure A,Rapid Freezing and Thawing inWater,and Procedure B,Rapid Freezing inAir and Thawing inWater.Both procedures are intended for use in determining theeffects
4、of variations in the properties of concrete on theresistance of the concrete to the freezing-and-thawing cyclesspecified in the particular procedure.Neither procedure isintended to provide a quantitative measure of the length ofservice that may be expected from a specific type of concrete.1.2 The va
5、lues stated in either inch-pound units or SI unitsshall be regarded separately as standard.The SI units areshown in brackets.The values stated may not be exactequivalents;therefore each system must be used independentlyof the other.Combining values from the two units may resultin nonconformance.1.3
6、All material in this test method not specifically desig-nated as belonging to Procedure A or Procedure B applies toeither procedure.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
7、 appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C157/C157M Test Method for Length Change of HardenedHydraulic-Cement Mortar and ConcreteC192/C192M Practice for Making and Curing Concrete TestS
8、pecimens in the LaboratoryC215 TestMethodforFundamentalTransverse,Longitudinal,and Torsional Resonant Frequencies ofConcrete SpecimensC233 Test Method for Air-Entraining Admixtures for Con-creteC295 Guide for Petrographic Examination ofAggregates forConcreteC341/C341M Practice for Preparation and Co
9、nditioning ofCast,Drilled,or Sawed Specimens of Hydraulic-CementMortar and Concrete Used for Length Change Measure-mentsC490 Practice for Use ofApparatus for the Determination ofLength Change of Hardened Cement Paste,Mortar,andConcreteC494/C494M Specification for Chemical Admixtures forConcreteC670
10、Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC823 Practice for Examination and Sampling of HardenedConcrete in Constructions2.2 ASTM STP:2ASTM STP 169C and D1,2 Significance of Tests andProperties of Concrete and Concrete-Making Materials3.Significan
11、ce and Use3.1 As noted in the scope,the two procedures described inthis test method are intended to determine the effects ofvariations in both properties and conditioning of concrete in theresistance to freezing and thawing cycles specified in theparticular procedure.Specific applications include sp
12、ecifieduse in Specification C494/C494M,Test Method C233,andranking of coarse aggregates as to their effect on concretefreeze-thaw durability,especially where soundness of theaggregate is questionable.3.2 It is assumed that the procedures will have no signifi-cantly damaging effects on frost-resistan
13、t concrete which maybe defined as(1)any concrete not critically saturated withwater(that is,not sufficiently saturated to be damaged byfreezing)and(2)concrete made with frost-resistant aggregatesand having an adequate air-void system that has achieved1This test method is under the jurisdiction of AS
14、TM Committee C09 onConcrete and Concrete Aggregatesand is the direct responsibility of SubcommitteeC09.67 on Resistance to the Environment.Current edition approved Feb.1,2015.Published March 2015.Originallyapproved in 1971.Last previous edition approved in 2008 as C666/C666M 03(2008).DOI:10.1520/C06
15、66_C0666M-15.2For referenced ASTM standards and Special Technical Publications(STPs),visit the ASTM website,www.astm.org,or contact ASTM Customer Service atserviceastm.org.For Annual Book of ASTM Standards volume information,referto the standards Document Summary page on the ASTM website.*A Summary
16、of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 appropriate maturity and thus will prevent critical saturation bywater under common conditions.3.3 If as a result of performance tests as described in thistest method concrete is found to be relatively unaffected,it canbe assumed that it was either not critically saturated,or wasmade with“sound”aggregates,a proper air-void system,anda
