1、Designation:C858101Standard Specification forUnderground Precast Concrete Utility Structures1This standard is issued under the fixed designation C858;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEAir entrainment admixture information was moved editorially from subsection 5.3.3 to subsection 6.3.2 inNovember 2010.1.Scope1.1 This specification cove
3、rs the recommended design cri-teria and manufacturing practices for monolithic or sectionalprecast concrete utility structures.Concrete pipe and boxculverts are not covered under this specification.Also,precastconcrete manholes covered in Specification C478 are excludedfrom this specification.1.2 Th
4、e values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2A82/A82M Specification for Steel Wire,Plain,for Co
5、ncreteReinforcementA184/A184M Specification for Welded Deformed Steel BarMats for Concrete ReinforcementA185/A185M Specification for Steel Welded Wire Rein-forcement,Plain,for ConcreteA496/A496M Specification for Steel Wire,Deformed,forConcrete ReinforcementA497/A497M Specification for Steel Welded
6、Wire Rein-forcement,Deformed,for ConcreteA615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA706/A706M Specification for Low-Alloy Steel Deformedand Plain Bars for Concrete ReinforcementA996/A996M Specification for Rail-Steel and Axle-SteelDeformed Bars for C
7、oncrete ReinforcementC31/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 Conc
8、reteC94/C94M Specification for Ready-Mixed ConcreteC150 Specification for Portland CementC192/C192M Practice for Making and Curing Concrete TestSpecimens in the LaboratoryC231 Test Method for Air Content of Freshly Mixed Con-crete by the Pressure MethodC260 Specification for Air-Entraining Admixture
9、s for Con-creteC330 Specification for Lightweight Aggregates for Struc-tural ConcreteC478 Specification for Precast Reinforced Concrete Man-hole SectionsC494/C494M Specification for Chemical Admixtures forConcreteC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and
10、 Raw or CalcinedNatural Pozzolan for Use in ConcreteC857 Practice for Minimum Structural Design Loading forUnderground Precast Concrete Utility StructuresC989 Specification for Slag Cement for Use in Concrete andMortars2.2 American Concrete Institute Standard:ACI 318 Building Code Requirements for R
11、einforced Con-crete32.3 American Welding Society Standard:AWS-D1.4 Structural Welding Code Reinforcing Steel43.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 utility structurea structure that is used by electric,gas,communication,or similar industries.1This specification is unde
12、r the jurisdiction ofASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.10 onUtility Structures.Current edition approved Feb.15,2010.Published February 2010.Originallyapproved in 1978.Last previous edition approved in 2009 as C858 09.DOI:10.1520/C0858
13、-10E01.2For 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.3Available from American Concrete Institute(ACI),P.O.Box 90
14、94,FarmingtonHills,MI 48333-9094,http:/www.aci-int.org.4Available from American Welding Society(AWS),550 NW LeJeune Rd.,Miami,FL 33126,http:/www.aws.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Ordering Information4.1 Unless othe
15、rwise stipulated by the purchaser in hisorder,a structure produced in accordance with this specifica-tion and constructed in accordance with the design drawingsapproved by the purchaser shall be acceptable.5.Materials5.1 Cementitious Materials:5.1.1 CementCement shall conform to the requirementsfor
16、Portland cement of Specification C150 or shall be Portlandblast-furnace slag cement or Portland-pozzolan cement con-forming to the requirements of Specification C595,except thatthe pozzolan constituent in the Type IP Portland-pozzolancement shall be fly ash.5.1.2 Fly AshFly ash shall conform to the requirements ofSpecification C618,Class F or Class C.5.1.3 Ground Granulated Blast-Furnace Slag(GGBFS)GGBFS shall conform to the requirements of Grade 100 or 120of Specification C989.5.1.4 Allowable C
