1、Designation:A882/A882M04a(Reapproved 2010)Standard Specification forFilled Epoxy-Coated Seven-Wire Prestressing Steel Strand1This standard is issued under the fixed designation A882/A882M;the number immediately following the designation indicates the yearof original adoption or,in the case of revisi
2、on,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers ASTM Specification A416/A416M low-relaxation Grade 250 and Grade 270 seven-wirepr
3、estressing steel strand with protective fusion-bonded epoxycoating applied by the electrostatic deposition method or othermethod that will meet the coating requirements in Section 8,and,except as allowed by 1.2,with the interstices of the sevenwires filled with epoxy to minimize migration of corrosi
4、vemedia,either by capillary action or other hydrostatic forces.NOTE1The manufacturer as identified throughout this specification isthe coating applicator.1.2 Upon special request by the purchaser,the interstices areleft unfilled.NOTE2Unfilled strand can corrode from the inside and its applicationfor
5、 prestressing tendons in concrete or for rock and soil anchors is notrecommended.1.3 This specification is applicable for orders in eitherinch-pound units(as Specification A882)or SI units asSpecification A882M.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately
6、 as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for
7、Mechanical Testingof Steel ProductsA416/A416M Specification for Steel Strand,UncoatedSeven-Wire for Prestressed ConcreteB117 Practice for Operating Salt Spray(Fog)ApparatusD968 Test Methods for Abrasion Resistance of OrganicCoatings by Falling AbrasiveG12 Test Method for Nondestructive Measurement o
8、f FilmThickness of Pipeline Coatings on Steel(Withdrawn2013)3G14 Test Method for Impact Resistance of Pipeline Coatings(Falling Weight Test)G20 Test Method for Chemical Resistance of Pipeline Coat-ings2.2 Federal Highway Administration Report:FHWA-RD-74-18 Nonmetallic Coatings for Concrete Rein-forc
9、ing Bars(February 1974)43.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 disbondingloss of adhesion between the fusion-bonded epoxy coating and the steel strand wires.3.1.2 fusion-bonded epoxy coatinga product containingpigments,thermo-setting epoxy resins,cross-linking agents,a
10、nd other substances,which is applied in the form of powderonto a clean,heated metallic substrate and fuses to form acontinuous barrier coating.3.1.3 gritinert particles impregnated on the outer surfaceof the epoxy coating for improving bond with cement grout.3.1.4 holidaya discontinuity in the coati
11、ng that is notdiscernible to a person with normal or corrected vision.3.1.5 patching materiala liquid coating used to repairdamaged or uncoated areas.4.Ordering Information4.1 The purchaser should specify:4.1.1 Diameter,grade,and type of uncoated strand inaccordance with Specification A416/A416M(lat
12、est edition).4.1.2 Smooth or grit impregnated coating(see 7.3).4.1.3 Quantity(in feet metres).4.1.4 Requirements for certification(see A1.2.3).4.1.5 Requirements for material samples(see 5.3).4.1.6 Requirements for patching material(see 5.4).1This specification is under the jurisdiction of ASTM Comm
13、ittee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 on Steel Reinforcement.Current edition approved May 1,2010.Published July 2010.Originally approvedin 1991.Last previous edition approved in 2004 as A882/A882M 04a.DOI:10.1520/A0882_A0882M-04A
14、R10.2For 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 refe
15、renced onwww.astm.org.4Available from National Technical Information Service(NTIS),5285 PortRoyal Rd.,Springfield,VA 22161,http:/www.ntis.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);4.1.7
16、 Number of pullout tests to be performed,if any.NOTE3A typical ordering description for epoxy-coated strand is asfollows:84 000 feet 2560 m of grit-impregnated epoxy-coated strand,12-in.12.7-mm diameter,Grade 270 K low-relaxation on wooden reelsto ASTM Specification A882 A882M .5.Materials5.1 Prestressing steel strand to be coated shall meet therequirements of Specification A416/A416M as specified by thepurchaser and shall be free of contaminants such as oil,grease,or paint.5.1.1 Filled epoxy-co