ASTM C858-2009 Standard Specification for Underground Precast Concrete Utility Structures.pdf
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1、Designation: C 858 09Standard 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 () 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 util
3、ity structures. Concrete pipe and boxculverts are not covered under this specification. Also, precastconcrete manholes covered in Specification C 478 are excludedfrom this specification.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathe
4、maticalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A 82/A 82M Specification for Steel Wire, Plain, for Con-crete ReinforcementA 184/A 184M Specification for Welded Deformed SteelBar Mats for Concrete Reinfor
5、cementA 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 Wire Rein-forcement, Deformed, for ConcreteA 615/A 615M Specification for Deformed and P
6、lainCarbon-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 Bars for Concrete ReinforcementC 31/C 31M Practice for Making and Curing Concrete TestSpe
7、cimens 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 Beams of ConcreteC 94/C 94M Specification for Ready-Mixed ConcreteC 150 Specification
8、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-Entraining Admixtures for Con-creteC 330 Specification for Lightweight Aggregates for St
9、ruc-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 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC 857 Prac
10、tice for Minimum Structural Design Loading forUnderground Precast Concrete Utility StructuresC 989 Specification for Ground Granulated Blast-FurnaceSlag for Use in Concrete and Mortars2.2 American Concrete Institute Standard:ACI 318 Building Code Requirements for Reinforced Con-crete32.3 American We
11、lding 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.1This specification is under the jurisdiction ofASTM Committe
12、e C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.10 onUtility Structures.Current edition approved Jan. 1, 2009. Published January 2009. Originallyapproved in 1978. Last previous edition approved in 2007 as C 858 07.2For referenced ASTM standards, visit the ASTM
13、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 9094, FarmingtonHills, MI 48333-9094, http:/www.
14、aci-int.org.4Available from American Welding Society (AWS), 550 NW LeJeune Rd.,Miami, FL 33126, http:/www.aws.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4. Ordering Information4.1 Unless otherwise stipulated by the purchaser
15、 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 Portland cement of Specificatio
16、n C 150 or shall be Portlandblast-furnace slag cement or Portland-pozzolan cement con-forming to the requirements of Specification C 595, except thatthe pozzolan constituent in the Type IP Portland-pozzolancement shall be fly ash.5.1.2 Fly AshFly ash shall conform to the requirementsof Specification
17、 C 618, 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 C 989.5.1.4 Allowable Combinations of Cementitious MaterialThe combination of cementitious materials used in concreteshall be one of the following:
18、5.1.4.1 Portland cement only;5.1.4.2 Portland blast furnace slag cement only;5.1.4.3 Slag-modified Portland cement only;5.1.4.4 Portland-pozzolan cement only;5.1.4.5 A combination of Portland cement and fly ash;5.1.4.6 A combination of Portland cement and groundgranulated blast-furnace slag;5.1.4.7
19、A combination of Portland cement, ground granu-lated blast-furnace slag (not to exceed 25 %of the total cemen-titious weight), and fly ash (not to exceed 25 % of the totalcemenetitious weight).5.2 AggregatesAggregate shall conform to SpecificationC33and light-weight aggregate shall conform to Specif
20、icationC 330, except that the requirements for grading shall not apply.5.3 AdmixturesAdmixtures may 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 Pozzol
21、anic AdmixtureFly ash or otherpozzolanic admixtures shall conform to Specification C 618.5.3.3 Air-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 co
22、ntain 5.5 61.5 % air by volume as determined by Specification C 231.5.4 WaterWater used for curing, 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.
23、5 Steel Reinforcement:5.5.1 Wire ReinforcementWire reinforcement shall con-form to Specifications 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
24、 Specifications A 184/A 184M, A 615/A 615M, A 706/A 706M,orA 996/A 996M.6. Manufacture6.1 FormsForms 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
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