1、Designation:C28907Standard Test Method forPotential Alkali-Silica Reactivity of Aggregates(ChemicalMethod)1This standard is issued under the fixed designation C289;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript 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 chemical determination
3、 of thepotential reactivity of an aggregate with alkalies in portland-cement concrete as indicated by the amount of reaction during24 h at 80 C between 1 N sodium hydroxide solution andaggregate that has been crushed and sieved to pass a 300-msieve and be retained on a 150-m sieve.1.2 The values sta
4、ted in SI units are to be regarded asstandard.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 regulato
5、ry limitations prior to use.A specific precau-tionary statement is given in 5.7.1.2.Referenced Documents2.1 ASTM Standards:2C114 Test Methods for Chemical Analysis of HydraulicCementC227 Test Method for Potential Alkali Reactivity ofCement-Aggregate Combinations(Mortar-Bar Method)C295 Guide for Petr
6、ographic Examination ofAggregates forConcreteC702 Practice for Reducing Samples ofAggregate to TestingSizeC1005 Specification for Reference Masses and Devices forDetermining Mass and Volume for Use in the PhysicalTesting of Hydraulic CementsC1260 Test Method for Potential Alkali Reactivity of Ag-gre
7、gates(Mortar-Bar Method)C1293 Test Method for Determination of Length Change ofConcrete Due to Alkali-Silica ReactionD75 Practice for Sampling AggregatesD1193 Specification for Reagent WaterD1248 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and CableE11 Specification for Woven
8、 Wire Test Sieve Cloth and TestSievesE60 Practice for Analysis of Metals,Ores,and RelatedMaterials by Spectrophotometry2.2 American Chemical Society Documents:Reagent Chemicals,American Chemical Society Specifica-tionsNOTE1For suggestions on the testing of reagents not listed by theAmerican Chemical
9、 Society,see“Reagent Chemicals and Standards,”byJoseph Rosin,D.Van Nostrand Co.,Inc.,New York,NY,and the“UnitedStates Pharmacopeia.”3.Significance and Use3.1 When this test method is used to evaluate the potentialreactivity of siliceous components in the aggregate withalkalies in hydraulic-cement co
10、ncrete,it must be used incombination with other methods.Do not use the results of testsby this test method as the sole basis for acceptance or rejectionfor sources with regard to ASR.3.2 Reactions between a sodium hydroxide solution andsiliceous components in the aggregate have been shown tocorrelat
11、e with the performance of some aggregates in concretestructures.The results from this test method can be obtainedquickly,and,while not completely reliable in all cases,theycan provide useful data.3.3 This test method can be employed as a quality controltool to periodically check samples from an exis
12、ting source withan acceptable service history.4.Apparatus4.1 ScalesThe scales and weights used for weighingmaterials shall conform to the requirements prescribed inSpecification C1005.1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the dire
13、ct responsibility of SubcommitteeC09.26 on Chemical Reactions.Current edition approved Nov.1,2007.Published December 2007.Originallyapproved in 1952.Last previous edition approved in 2003 as C289 03.DOI:10.1520/C0289-07.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact AST
14、M Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,
15、PA 19428-2959.United States1 4.2 BalancesThe analytical balance and weights used fordetermining dissolved silica by the gravimetric method shallconform to the requirements prescribed in Test Methods C114.4.3 Crushing and Grinding EquipmentA small jawcrusher and disk pulverizer or other suitable equi
16、pment capableof crushing and grinding aggregate to pass a 300-m sieve.4.4 Sieves:4.4.1 300-m and 150-m square-hole,woven wire-clothsieves conforming to Specification E11.4.4.2 A 4.75-mm(No.4)sieve.4.5 ContainersReaction containers of 50 to 75-mLcapacity,made of corrosion-resistant steel or other corrosion-resistant material,and fitted with airtight covers.A containerthat has been found suitable is shown in Fig.1.Othercontainers,made of corrosion-resistant material such aspolyethylene,may be suit
