ASTM C478M-2014 Standard Specification for Precast Reinforced Concrete Manhole Sections &40 Metric&41 《预制钢筋混凝土人孔型材的标准规格 (米制)》.pdf
《ASTM C478M-2014 Standard Specification for Precast Reinforced Concrete Manhole Sections &40 Metric&41 《预制钢筋混凝土人孔型材的标准规格 (米制)》.pdf》由会员分享,可在线阅读,更多相关《ASTM C478M-2014 Standard Specification for Precast Reinforced Concrete Manhole Sections &40 Metric&41 《预制钢筋混凝土人孔型材的标准规格 (米制)》.pdf(9页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C478M 14Standard Specification forPrecast Reinforced Concrete Manhole Sections (Metric)1This standard is issued under the fixed designation C478M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.PART IGENERAL1. Scope1.1 This specification covers the
3、manufacture and purchaserequirements of products used for the assembly and construc-tion of circular vertical precast reinforced concrete manholesand structures used in sewer, drainage, and water works.1.2 Part I, Sections 111, of this specification presentsgeneral requirements and requirements whic
4、h are common toeach precast concrete product covered by this specification.1.3 Part II of this specification presents specific require-ments for each manhole product in the following sections:Product SectionGrade Rings 12Flat Slab Tops 13Risers and Conical Tops 14Base Sections 15Steps and Ladders 16
5、NOTE 1Future products will be included in Part II in a future revisionof this specification.1.4 This specification is the SI companion to C478.NOTE 2This specification is a manufacturing and purchase specifica-tion only, and does not include requirements for backfill, or the relation-ship between fi
6、eld load conditions and the strength requirements of themanhole products and appurtenances. Experience has shown, however,that the successful performance of this product depends upon the properselection of the product strength, type of foundation and backfill, and carein the field installation of th
7、e manhole products and connecting pipes. Theowner of the project for which these products are specified herein iscautioned to require inspection at the construction site.2. Referenced Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforc
8、ementA706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete ReinforcementA1064/A1064M Specification for Carbon-Steel Wire andWelded Wire Reinforcement, Plain and Deformed, forConcreteC33 Specification for Concrete AggregatesC39/C39M Test Method for Compressive Strength of
9、Cylin-drical Concrete SpecimensC150 Specification for Portland CementC260 Specification for Air-Entraining Admixtures for Con-creteC309 Specification for Liquid Membrane-Forming Com-pounds for Curing ConcreteC494/C494M Specification for Chemical Admixtures forConcreteC497 Test Methods for Concrete P
10、ipe, Manhole Sections, orTileC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC822 Terminology Relating to Concrete Pipe and RelatedProductsC989 Specification for Slag Cement for Use in Concrete andMortarsC1017
11、/C1017M Specification for Chemical Admixtures forUse in Producing Flowing Concrete2.2 ACI Standard:ACI 318 Building Code, Requirements for Reinforced Con-crete33. Terminology3.1 DefinitionsFor definitions of terms relating to concretepipe, see Terminology C822.4. Materials and Manufacture4.1 General
12、 material requirements for precast reinforcedconcrete manhole products are presented in 4.1.1 4.1.8. Other1This specification is under the jurisdiction of ASTM Committee C13 onConcrete Pipe and is the direct responsibility of Subcommittee C13.06 on Manholesand Specials.Current edition approved Sept.
13、 15, 2014. Published October 2014. Originallyapproved in 1980. Last previous edition approved in 2013 as C478M 13. DOI:10.1520/C0478M-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
14、nformation, 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.aci-int.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Unit
15、ed States1materials or additional requirements for a product, if any, arecovered in the Part II section for that specific product.4.1.1 Reinforced ConcreteReinforced concrete shall con-sist of cementitious materials, mineral aggregates, and water, inwhich steel reinforcement has been embedded in suc
16、h amanner so that the steel reinforcement and concrete acttogether.4.1.2 Cementitious Materials:4.1.2.1 CementCement shall conform to the requirementsfor portland cement of Specification C150, or shall be portlandblast-furnace slag cement or portland-pozzolan cement con-forming to Specification C595
17、, except that the pozzolanconstituent of the Type IP portland-pozzolan cement shall befly ash.4.1.2.2 Fly AshFly ash shall conform to the requirementsof Class F or Class C of Specification C618.4.1.2.3 Slag CementSlag cement shall conform to therequirements of Grade 100 or 120 of Specification C989.
18、4.1.3 Allowable Combinations of Cementitious MaterialsThe combination of cementitious materials used in the concreteshall be one of the following:4.1.3.1 Portland cement only,4.1.3.2 Portland blast-furnace slag cement only,4.1.3.3 Portland pozzolan cement only,4.1.3.4 A combination of Portland cemen
19、t and slag cement,4.1.3.5 A combination of Portland cement and fly ash, or4.1.3.6 A combination of Portland cement, slag cement (notto exceed 25 % of the total cementitious weight) and fly ash(not to exceed 25 % of the total cementitious weight).4.1.4 AggregatesAggregates shall conform to Specifica-
20、tion C33, except that the requirements for gradation shall notapply.4.1.5 Admixtures and BlendsThe following admixturesand blends are allowable:4.1.5.1 Air-entraining admixture conforming to Specifica-tion C260;4.1.5.2 Chemical admixture conforming to SpecificationC494/C494M;4.1.5.3 Chemical admixtu
21、re for use in producing flowingconcrete conforming to Specification C1017/C1017M;4.1.5.4 Chemical admixture or blend approved by theowner.4.1.6 Steel ReinforcementReinforcement shall consist ofwire and welded wire conforming to Specification A1064/A1064M; or of bars conforming to Specification A615/
22、A615M, Grade 280 or 420, or Specification A706/A706M,Grade 420.4.1.7 Secondary Synthetic FiberCollated fibrillated poly-propylene virgin fibers shall not be prohibited when used insteel reinforced concrete manholes as a non-structural manu-facturing enhancement. Only fibers designed and manufactured
23、specifically for use in concrete and so certified by the manu-facturer shall be accepted.4.1.8 Other MaterialsOther materials required for a prod-uct and not covered in Section 4 will be covered in the Part IIsection for that specific product.5. Design5.1 Design requirements for a product are prescr
24、ibed in thespecific Part II section for that product.5.1.1 The minimum compressive strength of concrete man-hole products covered by this specification shall be 27.6 MPaunless specified otherwise in Part II of this specification.5.2 Modified or Special Design:5.2.1 Manufacturers are not prohibited f
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