ASTM_G_109_-_07_2013.pdf

Designation:G10907(Reapproved 2013)Standard Test Method forDetermining Effects of Chemical Admixtures on Corrosionof Embedded Steel Reinforcement in Concrete Exposed toChloride Environments1This standard is issued under the fixed designation G109;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year 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.Scope1.1 This test method covers a procedure for determining theeffects of chemical admixtures on the corrosion of metals inconcrete.This test method can be used to evaluate materialsintended to inhibit chloride-induced corrosion of steel inconcrete.It can also be used to evaluate the corrosivity ofadmixtures in a chloride environment.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 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 limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementC33 Specification for Concrete AggregatesC143/C143M Test Method for Slump of Hydraulic-CementConcreteC150 Specification for Portland CementC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC511 Specification for Mixing Rooms,Moist Cabinets,Moist Rooms,and Water Storage Tanks Used in theTesting of Hydraulic Cements and ConcretesC876 Test Method for Corrosion Potentials of UncoatedReinforcing Steel in ConcreteC881/C881M Specification for Epoxy-Resin-Base BondingSystems for ConcreteC1152/C1152M Test Method for Acid-Soluble Chloride inMortar and ConcreteD448 Classification for Sizes of Aggregate for Road andBridge ConstructionD632 Specification for Sodium ChlorideE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG3 Practice for Conventions Applicable to ElectrochemicalMeasurements in Corrosion TestingG15 Terminology Relating to Corrosion and Corrosion Test-ing(Withdrawn 2010)3G33 Practice for Recording Data from Atmospheric Corro-sion Tests of Metallic-Coated Steel SpecimensG46 Guide for Examination and Evaluation of Pitting Cor-rosion2.2 NACE Standards:4SSPC-SP 5/NACE No.1 White Metal Blast Cleaning3.Significance and Use3.1 This test method provides a reliable means for predict-ing the inhibiting or corrosive properties of admixtures to beused in concrete.3.2 This test method is useful for development studies ofcorrosion inhibitors to be used in concrete.3.3 This test method has been used elsewhere with goodagreement between corrosion as measured by this test method1This test method is under the jurisdiction of ASTM Committee G01 onCorrosion of Metals and is the direct responsibility of Subcommittee G01.14 onCorrosion of Metals in Construction Materials.Current edition approved May 1,2013.Published July 2013.Originally approvedin 1992.Last previous edition approved in 2007 as G10907.DOI:10.1520/G0109-07R13.2For 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 standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from The Society for Protective Coatings(SSPC),40 24th St.,6thFloor,Pittsburgh,PA 15222-4656.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 and corrosion damage on the embedded steel(1-4).5This testmethod might not properly rank the performance of differentcorrosion inhibitors,especially at concrete covers over the steelless than 40 mm(1.5 in.)or water-to-cement ratios above 0.45.The concrete mixture proportions and cover over the steel arechosen to accelerate chloride ingress.Some inhibitors mighthave an effect on this process,which could lead to results thatwould differ from what would be expected in actual use(5).4.Apparatus4.1 The apparatus required for the evaluation of corrosioninhibitors includes a high impedance voltmeter(at least oneMohm)capable of measuring to 0.01 mV,a 100 (65%)resistor.5.Reagents and Materials5.1 Cement,that conforms to Type I or Type II of Specifi-cation C150.Coarse aggregate shall conform to SpecificationC33 and Classification D448,with nominal maximum sizebetween 9.5 and 19 mm(38and34in.).NO