ASTM_C_915_-_79_2010.pdf

Designation:C91579(Reapproved 2010)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 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 specification covers open-and closed-face precastreinforced concrete crib walls intended to act as earth-retainingstructures or 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 consideration 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 construction site.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA615/A615M Specification 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 Practice for Making and Curing Concrete TestSpecimens in the FieldC33 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 Ready-Mixed ConcreteC150 Specification for Portland CementC173/C173M Test Method forAir Content of Freshly MixedConcrete by the Volumetric MethodC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC260 Specification for Air-Entraining Admixtures for Con-creteC309 Specification for Liquid Membrane-Forming Com-pounds for Curing ConcreteC330 Specification for Lightweight Aggregates for Struc-tural ConcreteC494/C494M Specification for Chemical Admixtures forConcreteC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash 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 members 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,aggregate,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 cylindercompression tests shall be as specified in 6.3,and the testmethod shall conform to the requirements of Test MethodC39/C39M.The manufacturers statement shall also certifyadherence to tolerance dimensions of Section 9.4.2 Acceptability of the concrete strength of completedcribbing produced in accordance with Section 6 may also be1This specification 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 1,2010.Published August 2010.Last previousedition approved in 2002 as C915 79(2002).DOI:10.1520/C0915-79R10.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 determined by compressive tests of concrete cores in accor-dance with Test Method C42/C42M.5.Materials5.1 CementPortland cement shall conform to the require-ments of Specification C150 or shall be portland blast-furnaceslag cement or portland-pozzolan cement conforming to therequirements of Specification C595.5.2 AggregatesAggregates shall conform to SpecificationC33 or