1、Designation: A1055/A1055M 16Standard Specification forZinc and Epoxy Dual-Coated Steel Reinforcing Bars1This standard is issued under the fixed designation A1055/A1055M; the number immediately following the designation indicates theyear of original adoption or, in the case of revision, the year of l
2、ast revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers deformed and plain steelreinforcing bars with a dual coating of zinc-alloy followed byan epo
3、xy coating applied by the electrostatic spray method.1.2 The zinc-alloy coating is produced as one of two types:zinc-alloy applied by the thermal spray method (Type I) orzinc-alloy applied in accordance with Specification A1094/A1094M (Type II).NOTE 1The coating applicator is identified throughout t
4、his specifica-tion as the manufacturer.1.3 Requirements for the zinc coating are contained inTable 1.1.4 Requirements for epoxy powder coatings are containedin Annex A1.1.5 Guidelines for construction practices at the job-site arepresented in Appendix X1.1.6 The text of this specification references
5、 notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and figures) shall not beconsidered as requirements of the specification.1.7 This specification is applicable for orders in eitherinch-pound units as Specification A1055 or SI units asSpecific
6、ation A1055M.1.8 The values stated in either inch-pound units or SI unitsare to be regarded as standard. Within the text, the SI units areshown in brackets. The values stated in each system may not beexact equivalents; therefore, each system must be used inde-pendently of the other, except as specif
7、ically noted in Table 2.Combining values from the two systems may result in non-conformance with this specification.1.9 This specification does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this specification to establishapp
8、ropriate safety and health practices and determine theapplicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA706/A706M Specification for Deformed and Plain Low-Alloy
9、Steel Bars for Concrete ReinforcementA775/A775M Specification for Epoxy-Coated Steel Rein-forcing BarsA944 Test Method for Comparing Bond Strength of SteelReinforcing Bars to Concrete Using Beam-End Speci-mensA996/A996M Specification for Rail-Steel and Axle-SteelDeformed Bars for Concrete Reinforcem
10、entA1094/A1094M Specification for Continuous Hot-Dip Gal-vanized Steel Bars for Concrete ReinforcementB117 Practice for Operating Salt Spray (Fog) ApparatusB833 Specification for Zinc and Zinc Alloy Wire for Ther-mal Spraying (Metallizing) for the Corrosion Protection ofSteelD4060 Test Method for Ab
11、rasion Resistance of OrganicCoatings by the Taber AbraserD4417 Test Methods for Field Measurement of SurfaceProfile of Blast Cleaned SteelE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numb
12、ering System (UNS)G14 Test Method for Impact Resistance of Pipeline Coatings(Falling Weight Test)G20 Test Method for Chemical Resistance of Pipeline Coat-ingsG62 Test Methods for Holiday Detection in Pipeline Coat-ings2.2 American Welding Society:3ANSI/AWS A5.33 Specification for Solid and CeramicWi
13、res and Ceramic Rods for Thermal SprayingAWS C2.23MC2.23 Specification for the Application of1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.05 on Steel Reinforcement.Current edition a
14、pproved Dec. 1, 2016. Published March 2017. Originallyapproved in 2008. Last previous edition approved in 2010 as A1055 101. DOI:10.1520/A1055_A1055M-16.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMSt
15、andards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Welding Society (AWS), 8669 NW 36 St., #130,Miami, FL 33166-6672, http:/www.aws.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100
16、Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Rec
17、ommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Thermal Spray Coatings (Metallizing) of Aluminum,Zinc, and Their Alloys and Composites for the CorrosionProtection for SteelAWS C2.25C2.25M Specification for Thermal SprayFeedstockSolid and Composite Wir
18、e and Ceramic Rods2.3 Society for Protective Coatings Specifications:4SSPC-PA 2 Measurement of Dry Coating Thickness withMagnetic GagesSSPC-SP 10 Near-White Blast CleaningSSPC-VIS 1 Pictorial Surface Preparation standards forPainting Steel Surfaces2.4 Concrete Reinforcing Steel Institute:5Voluntary
19、Certification Program for Fusion Bonded EpoxyCoating Applicator Plants2.5 American Concrete Institute Standard:6ACI 301 Specifications for Structural Concrete3. Terminology3.1 Definitions of Terms Specific to This Specification:3.1.1 batch, nepoxy powder or patching material con-tained in an individ
20、ual shipping release or shipping order.3.1.2 damaged coating, narea surrounded by coatingwhere steel surface is visible to a person with normal orcorrected vision.3.1.3 disbonding, nloss of adhesion between the fusion-bonded epoxy coating and the zinc-coated steel reinforcing bar.3.1.4 fusion-bonded
21、 epoxy coating, na product containingpigments, thermosetting resins, cross-linking agents, and otheradditives, which is applied in the form of a powder onto aclean, heated metallic substrate and fused to form a continuousbarrier coating.3.1.5 holiday, na discontinuity in a coating that is notvisible
22、 to a person with normal or corrected vision.3.1.6 lot, nbars of one size and pattern of deformationscontained in an individual shipping release or shipping order.3.1.7 patching material, na liquid two-part, epoxy coatingused to repair damaged coating and to coat or uncoated areason the surface of a
23、 coated bar, or to coat cut ends of a coatedbar.3.1.8 thermal spray coating (metallizing), na zinc andzinc alloy, or both, wire used in depositing a metallized layerof zinc by thermal spraying (metallizing) using oxy-fuel orelectric-arc thermal spraying which is applied onto a clean,heated metallic
24、substrate to form a continuous coating.3.1.9 wetting agent, na material that decreases the surfacetension of water allowing it to penetrate more effectively intosmall discontinuities in the coating giving a more accurateindication of the holiday count.4Available from Society for Protective Coatings
25、(SSPC), 800 Trumbull Dr.,Pittsburgh, PA 15205, http:/www.sspc.org.5Available from Concrete Reinforcing Steel Institute (CRSI), 933 North PlumGrove Rd., Schaumburg, IL 60173-4758, http:/www.crsi.org.6Available from American Concrete Institute (ACI), 38800 Country Club Dr.,Farmington Hills, MI 48331-3
26、439, http:/www.concrete.org.TABLE 1 Chemical Composition Requirements for Zinc and Zinc-Alloy WiresCommonName(UNS)AAl,maxunlessnotedCd,maxCu,maxFe,maxPb,maxSn,maxSb,maxAg,maxBi,maxAs,maxNi,maxMg,maxMo,maxTi,maxZn,minOther,Total max99.99 ZincB(Z13005)0.002C0.003 0.005 0.003 0.003 0.001 D 99.99 99.99
27、ZincB(Z15005)0.01 0.02 0.02 0.02 0.03 99.90.10 totalnon-Zn99.995 Zinc()E0.001 0.003 0.001 0.002 0.003 0.003 99.995 0.00599.95 Zinc()0.01 0.02 0.001 0.02 0.03 0.001 99.95 0.05099.95 Zinc()0.01 0.005 0.7 0.01 0.005 0.001 0.01 0.01 0.18 99 1.098Zn/2Al(Z30402)1.5-2.5 0.005 0.005 0.02 0.005 0.003 0.10 0.
28、015 0.02 0.002 0.005 0.02 remainder AUNS designations were established in accordance with Practice E527.BIn accordance with ANSI/AWS A5.33.CThe following applies to all specified limits in this table. For the purposes of determining conformance with this specification, an observed value obtained fro
29、m analysisshall be rounded off to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of Practice E29.D indicates that the element is not applicable.E() indicates no Unified Numbering System (UNS) designation for this
30、 option.TABLE 2 Bend Test RequirementsA615, A706,or A996A615M, A706M,or A996MBend Angle(AfterRebound,degrees)TimetoCompletionmax, sBarNo.PinDiameterin.ABarNo.PinDiametermmA3 3 10 75 180 154 4 13 100 180 155 5 16 125 180 156 6 19 150 180 157 7 22 175 180 458 8 25 200 180 459B929B230 180 4510B10 32B25
31、0 180 4511B11 36B280 180 4514B17 43B430 90 4518B23 57B580 90 45APin diameters specified for similar size (shown on the same line) inch-pound barsand metric may be interchanged.BBar designation Nos. 9, 10, 11, 14, and 18 29, 32, 36, 43, and 57 are notcovered by Specification A996/A996M.A1055/A1055M 1
32、624. Ordering Information4.1 Orders for zinc-alloy and epoxy dual-coated steel rein-forcing bars under this specification shall contain the followinginformation:4.1.1 Specification for reinforcing bars to be coated (ASTMdesignation and year of issue) (5.1),4.1.2 Quantity of bars,4.1.3 Size designati
33、on and grade of bars,4.1.4 Requirements for the zinc-alloy coating, Type I orType II (5.2 and 5.3), and that Type II product be chemicallytreated by the galvanizer,4.1.5 Requirements for the epoxy powder coating (5.4),4.1.6 Quantity of patching material, and4.1.7 ASTM designation A1055 A1055M and ye
34、ar ofissue.4.2 The purchaser shall have the option to specify additionalrequirements, including, but not limited to the following:4.2.1 Requirements for providing powder coating samplesfrom each batch (5.4),4.2.2 Approval from the coating manufacturer that thepatching material supplied is compatible
35、 (5.5),4.2.3 Specific requirements for sampling and test frequencyfor thickness, continuity, flexibility, and adhesion (9.1),4.2.4 Whether a report on tests performed on the coatedsteel reinforcing bars being furnished is required (8.4.1 andSection 14),4.2.5 Requirements for inspection (12.1),4.2.6
36、Manufacturer qualification and certification require-ments (if any), and4.2.7 Other special requirements, if any.NOTE 2It is recommended that the coating application procedures andprocesses be audited by an independent certification program for coatingapplicator plants such as that provided by the V
37、oluntary CertificationProgram or equivalent.5. Materials5.1 Steel Reinforcing Bars for Type I Zinc-Alloy CoatedBars:5.1.1 Steel reinforcing bars to be coated shall meet therequirements of one of the following specifications: A615,A706, or A996 A615M, A706M, or A996M as specified bythe purchaser and
38、shall be free of contaminants such as oil,grease, or paint when received at the manufacturers plant andprior to cleaning and coating.NOTE 3Bars with sharp edges on the deformations, rolled-in slivers,or other surface imperfections are difficult to coat properly and should notbe coated. The coating w
39、ill flow away from the sharp edges and may resultin inadequate coating thickness at those points.5.2 Zinc-Alloy Wire for Type I Zinc-Alloy Coated Bars:5.2.1 The thermal spray coating feedstock material shall bespecified according to Specification B833 or toAWS C2.25C2.25M.5.2.2 The wire shall confor
40、m to one of the chemicalcomposition requirements prescribed in Table 1.5.2.3 The wire shall be clean and free of corrosion, adheringforeign material, scale, seams, nicks, burrs, and other defectswhich would interfere with the operation of thermal sprayingequipment. The wire shall uncoil readily and
41、be free of bendsor kinks that would prevent its passage through the thermalspray gun.5.2.4 The wire shall be a continuous length per spool, coil,or drum. Splices or welds are permitted, provided that they donot interfere with the thermal spray equipment or coatingprocess.5.2.5 The starting end of ea
42、ch coil shall be tagged toindicate winding direction and to be readily identifiable withASTM designation.5.3 Type II Zinc-Alloy Coated Bars:5.3.1 The product to be epoxy coated shall conform to therequirements of Specification A1094/A1094M.5.4 Epoxy Powder Coating:5.4.1 The epoxy powder coating shal
43、l conform to therequirements of Annex A1. Upon request, the purchaser shallbe provided with data confirming the epoxy powder coatingconforms to the requirements of Annex A1.5.4.2 A written certification shall be furnished to the pur-chaser that properly identifies the number of each batch ofepoxy po
44、wder coating used in the purchase order, materialquantity represented, date of manufacture, name and address ofthe epoxy powder coating manufacturer, and a statement thatthe supplied epoxy powder coating is the same composition asthat qualified in accordance with Annex A1 of this specifica-tion.5.4.
45、3 The epoxy powder coating shall be transported andstored in a temperature-controlled environment in accordancewith the documented recommendations of the manufacturer ofthe epoxy powder coating until ready for use. At that point, ifthe storage temperature is below the plant ambienttemperature, the e
46、poxy powder coating shall be given sufficienttime to reach a temperature that is within 65F 62C of theplant ambient temperature.5.4.4 The epoxy powder coating shall be used within theepoxy powder coating manufacturers written recommendedshelf life.5.5 If specified in the purchase order or contract,
47、a repre-sentative 8-oz 0.2-kg sample of the epoxy powder coatingshall be supplied to the purchaser from each lot. The sampleshall be packaged in an airtight container and identified by lotnumber.5.6 Patching material for repairing damaged epoxy coatingshall conform to the requirements ofAnnexA2 in S
48、pecificationA775/A775M.5.6.1 The manufacturer of the patching material shallspecify the metal surface preparation, the coating thickness,and the procedures for application of the patching material.5.6.2 If specified in the purchase order or contract, patchingmaterial shall be supplied to the purchas
49、er.6. Surface Preparation6.1 Type I:6.1.1 Blast media found to be contaminated with solublesalts shall be rejected.NOTE 4It is recommended that incoming steel reinforcing bars andblast media be checked for soluble salt contamination prior to use. SteelA1055/A1055M 163reinforcing bars found to be soluble salt contaminated from exposure todeicing salts or salt spray should be cleaned by acid washing or othersuitable methods to remove soluble salt contaminants from the surfaceprior to abrasi
