ASTM C858-2007 Standard Specification for Underground Precast Concrete Utility Structures《地下预制混凝土多用途结构的标准规范》.pdf
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1、Designation: C 858 07Standard Specification forUnderground Precast Concrete Utility Structures1This standard is issued under the fixed designation C 858; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the recommended design cri-teria and manufacturing practices for monolithic or sectionalprecast concrete uti
3、lity structures. Concrete pipe and boxculverts are not covered under this specification. Also, precastconcrete manholes covered in Specification C 478 are excludedfrom this specification.2. Referenced Documents2.1 ASTM Standards:2A 82/A 82M Specification for Steel Wire, Plain, for Con-crete Reinforc
4、ementA 184/A 184M Specification for Welded Deformed SteelBar Mats for Concrete ReinforcementA 185/A 185M Specification for Steel Welded Wire Rein-forcement, Plain, for ConcreteA 496/A 496M Specification for Steel Wire, Deformed, forConcrete ReinforcementA 497/A 497M Specification for Steel Welded Wi
5、re Rein-forcement, Deformed, for ConcreteA 615/A 615M Specification for Deformed and PlainCarbon-Steel Bars for Concrete ReinforcementA 706/A 706M Specification for Low-Alloy Steel De-formed and Plain Bars for Concrete ReinforcementA 996/A 996M Specification for Rail-Steel and Axle-SteelDeformed Bar
6、s for Concrete ReinforcementC 31/C 31M Practice for Making and Curing Concrete TestSpecimens in the FieldC33 Specification for Concrete AggregatesC 39/C 39M Test Method for Compressive Strength of Cy-lindrical Concrete SpecimensC 42/C 42M Test Method for Obtaining and Testing DrilledCores and Sawed
7、Beams of ConcreteC 94/C 94M Specification for Ready-Mixed ConcreteC 150 Specification for Portland CementC 192/C 192M Practice for Making and Curing ConcreteTest Specimens in the LaboratoryC 231 Test Method for Air Content of Freshly MixedConcrete by the Pressure MethodC 260 Specification for Air-En
8、training Admixtures for Con-creteC 330 Specification for Lightweight Aggregates for Struc-tural ConcreteC 478 Specification for Precast Reinforced Concrete Man-hole SectionsC 494/C 494M Specification for Chemical Admixtures forConcreteC 595 Specification for Blended Hydraulic CementsC 618 Specificat
9、ion for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC 857 Practice for Minimum Structural Design Loading forUnderground Precast Concrete Utility Structures2.2 American Concrete Institute Standard:ACI 318 Building Code Requirements for Reinforced Con-crete32.3 American Welding
10、 Society Standard:AWS-D1.4 Structural Welding Code Reinforcing Steel43. Terminology3.1 Definition of Term Specific to this Standard:3.1.1 utility structurea structure that is used by electric,gas, communication, or similar industries.4. Ordering Information4.1 Unless otherwise stipulated by the purc
11、haser 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 CementPortland cement shall conform to the require-ments of Specification C 150 or shall be portland blas
12、t-furnaceslag cement or portland pozzolan cement conforming to therequirements of Specification C 595.1This specification is under the jurisdiction ofASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.10 onUtility Structures.Current edition approved J
13、une 1, 2007. Published June 2007. Originallyapproved in 1978. Last previous edition approved in 2004 as C 858 83 (2004).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
14、 to the standards Document Summary page onthe ASTM website.3Available from American Concrete Institute (ACI), P.O. Box 9094, 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.1Copyright ASTM Int
15、ernational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2 AggregatesAggregate shall conform to SpecificationC33and light-weight aggregate shall conform to SpecificationC 330, except that the requirements for grading shall not apply.5.3 AdmixturesAdmixtures m
16、ay be used provided suchadmixtures are not injurious to other products used in theconcrete.5.3.1 Chemical AdmixturesChemical admixtures shallconform to Specification C 494/C 494M.5.3.2 Fly Ash and Pozzolanic AdmixtureFly ash or otherpozzolanic admixtures shall conform to Specification C 618.5.3.3 Ai
17、r-Entraining AdmixturesAir-entraining admix-tures conforming to Specification C 260 shall be used whenthere is a risk that the concrete may be exposed to afreeze-thaw cycle. The concrete mixture shall contain 5.5 61.5 % air by volume as determined by Specification C 231.5.4 WaterWater used for curin
18、g, washing aggregate, ormixing concrete shall be clean and free of injurious amounts ofoil, acids, alkalis, salts, organic materials, or other substancesthat may be incompatible with concrete or steel.5.5 Steel Reinforcement:5.5.1 Wire ReinforcementWire reinforcement shall con-form to Specifications
19、 A 82/A 82M or A 496/A 496M.5.5.2 Wire Fabric ReinforcementWire fabric reinforce-ment shall conform to Specifications A 185/A 185M or A 497/A 497M.5.5.3 Bar ReinforcementBar reinforcement shall conformto Specifications A 184/A 184M, A 615/A 615M, A 706/A 706M,orA 996/A 996M.6. Manufacture6.1 FormsFo
20、rms shall be accurately constructed andstrong enough to maintain the structures dimensions withinthe tolerances given in Section 8. Forms should be constructedin such a manner as to minimize the seepage of water. Allcasting surfaces shall be smooth nonporous material.6.1.1 Cleaning and OilingForms s
21、hall be cleaned beforeeach use. New forms shall be free of paint or other protectivecoatings that might cling to the surface of the structure.Releasing agents applied to the form to aid in breaking thebond between the form and the concrete shall not be injuriousto the concrete.6.2 ReinforcementSteel
22、 reinforcement shall conform tothe requirements of this specification and shall be securelypositioned in the form to maintain design concrete cover givenin Section 7 during concrete placement. All chairs, bolsters,braces, and spacers in contact with form and reinforcing rodshall be of material that
23、will not deteriorate.6.3 MixtureThe aggregates shall be sized, graded, propor-tioned, and thoroughly mixed in a batch mixer with proportionsof cement and water as will produce a homogeneous concretehaving the required specified compressive strength. If Ready-Mix concrete is used, it shall be in acco
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