1、Designation:C91579(Reapproved 2018)Standard Specification forPrecast Reinforced Concrete Crib Wall Members1This standard is issued under the fixed designation C915;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.1.Scope1.1 This specification covers open-and closed-face precastreinforced concrete crib walls intended to act as earth-retainingstructures or
3、 as protection against stream encroachment.NOTE1This specification is a manufacturing and purchase specifica-tion only,with examples and suggestions for usage.Successful perfor-mance of this product depends on the proper selection and assembling ofmembers,proper foundation and bearing material,and c
4、onsideration ofbackfill heights,backfill material,drainage,and other engineering andconstruction considerations.The purchaser of the crib wall membersspecified herein is cautioned that he must properly correlate the fieldrequirements with the members selected and provide adequate inspectionat the co
5、nstruction site.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision
6、on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA615/A615M Specif
7、ication for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA616/A616M Specification for Rail-Steel Deformed andPlain Bars for Concrete Reinforcement(Withdrawn1999)3A617/A617M Specification for Axle-Steel Deformed andPlain Bars for Concrete Reinforcement(Withdrawn1999)3C31/C31M Practi
8、ce for Making and Curing Concrete TestSpecimens in the FieldC33/C33M Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of Cylin-drical Concrete SpecimensC42/C42M Test Method for Obtaining and Testing DrilledCores and Sawed Beams of ConcreteC94/C94M Specification for
9、Ready-Mixed ConcreteC150/C150M Specification for Portland CementC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC231/C231M Test Method forAir Content of Freshly MixedConcrete by the Pressure MethodC260/C260M Specification for Air-Entraining Admixturesfor Concre
10、teC309 Specification for Liquid Membrane-Forming Com-pounds for Curing ConcreteC330/C330M Specification for Lightweight Aggregates forStructural ConcreteC494/C494M Specification for Chemical Admixtures forConcreteC595/C595M Specification for Blended Hydraulic CementsC618 Specification for Coal Fly A
11、sh and Raw or CalcinedNatural Pozzolan for Use in Concrete3.Classification3.1 Cribbing manufactured in accordance with this specifi-cation shall be of open-or closed-face design and shallconform to the standard designs shown in Figs.1-4.4.Ordering Information4.1 Acceptability of the crib wall member
12、s in all crosssections and lengths produced in accordance with Section 6shall be determined by the results of cylinder compression testsof the placed concrete and mill certificates for the reinforcingsteel and cement.A written statement,signed by themanufacturer,shall verify that the cement,aggregat
13、e,admixtures,and reinforcing steel conform to the specificationsfor materials in Section 5 and that the preparation ofequipment,mixing,conveying,placing,consolidating,andcuring meet requirements of the applicable standard specifica-tions.The concrete strength as determined by the cylinder1This speci
14、fication is under the jurisdiction ofASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.20 onArchitectural and Structural Products.Current edition approved July 1,2018.Published July 2018.Originally approvedin 1979.Last previous edition approved in 20
15、10 as C915 79(2010).DOI:10.1520/C0915-79R18.2For 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 ver
16、sion of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor 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 compression te
