1、Designation: D3963/D3963M 01 (Reapproved 2007)D3963/D3963M 15Standard Specification forFabrication and Jobsite Handling of Epoxy-Coated SteelReinforcing Bars1This standard is issued under the fixed designation D3963/D3963M; the number immediately following the designation indicates theyear of origin
2、al adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the fabrication and jobsite requirement
3、s for deformed and plain steel reinforcing bars withprotective epoxy coating applied in accordance with Specification A775/A775M.1.2 This specification is applicable for orders in either SI units (as Specification D3963M) or inch-pound units (as SpecificationD3963).1.3 The values stated in either SI
4、 units or inch-pound units are to be regarded separately as standard. Within the text, theinch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system mustbe used independently of the other. Combining values from the two systems may resul
5、t in nonconformance with the specification.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulator
6、ylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A775/A775M Specification for Epoxy-Coated Steel Reinforcing BarsB117 Practice for Operating Salt Spray (Fog) ApparatusD374 Test Methods for Thickness of Solid Electrical Insulation (Withdrawn 2013)3D2967 Test Method for Corner Cove
7、rage of Powder CoatingsE177 Practice for Use of the Terms Precision and Bias in ASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test MethodG20 Test Method for Chemical Resistance of Pipeline Coatings2.2 Federal Highway Administration ReportFHWA-
8、RD-74-18 Nonmetallic Coatings for Concrete Reinforcing Bars43. Coating Repair Materials3.1 The patching or repair material shall be compatible with the coating, inert in concrete, and feasible for repairs at theapplicator, fabricator, or in the field. This material shall be approved in accordance wi
9、th Annex A1Annex A2 of SpecificationA775/A775M prior to use.3.2 The manufacturer shall specify the method of metal surface preparation, and the patching application procedures to be usedin the field.4. Handling and Identification4.1 Coated bars shall be transported and handled with care.All systems
10、for handling coated bars shall have padded contact areas.All bundling bands shall be padded, or suitable banding shall be used to prevent damage to the coating.All bundles of coated bars1 This specification is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direc
11、t responsibility of Subcommittee D04.32 on Bridgesand Structures.Current edition approved Dec. 1, 2007Aug. 1, 2015. Published January 2008August 2015. Originally approved in 1981. Last previous edition approved in 20012007 asD3963/D3963M 01.D3963/D3963M 01 (2007). DOI: 10.1520/D3963_D3963M-01R07. 10
12、.1520/D3963_D3963M-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this his
13、torical standard is referenced on www.astm.org.4 Available from National Technical Information Service (NTIS), 5285 Port Royal Rd., Springfield, VA 22161, http:/www.ntis.gov.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what chang
14、es have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the offici
15、al document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1shall be lifted with a strong back, spreader bar, multiple supports, or a platform bridge to prevent bar-to-bar abrasion from sagsin the bundles. The bars or bundles shall no
16、t be dropped or dragged.4.2 The identification (including heat number, mill test results, date and type of coating system used, etc.) of all reinforcing barsshall be maintained throughout the coating and fabrication processes to the point of shipment.5. Fabrication of Steel Reinforcing Bars After Co
17、ating5.1 The steel reinforcing bars to be fabricated after application of the coating shall meet the requirements of this specification.5.2 Handling and storage of coated bars at the fabricators facility shall meet the requirements of Section 4 and 6.3.5.3 Drive rolls on shear beds, and back-up barr
18、els on benders shall be protected with a suitable covering to minimize damageduring the fabrication process.6. Storage, Handling and Placement at the Jobsite6.1 The finished, installed coated steel reinforcing bars to be used in the construction shall meet the requirements of thisspecification.6.2 A
19、ll systems for handling the coated bars at the jobsite shall have padded contact areas. Coated bars or bundles shall not bedropped or dragged.6.3 Coated steel reinforcing bars shall be off-loaded as close as possible to their points of placement or under the crane so thatthe bars can be hoisted to t
20、he area of placement to minimize rehandling.6.4 Coated bars or bundles shall be stored above the ground on wooden or padded supports with timbers placed between bundleswhen stacking is necessary. Space the supports sufficiently to prevent sags in the bundles.6.5 Coated and uncoated steel reinforcing
21、 bars shall be stored separately.6.6 Long-term storage shall be minimized and material delivery scheduled to suit construction progress.6.7 Coated bars shall be tied with tie wire coated with epoxy, plastic, nylon or other non-conductive material that will notdamage or cut the coating.6.8 Bar suppor
22、ts and spacers shall be coated with or made of a non-conductive material compatible with concrete.6.9 Placed coated bars shall be covered with opaque polyethylene or other suitable protective material if cumulativeenvironmental exposure of the coated bars, including previous uncovered storage time,
23、of greater than two months prior to concreteembedment is expected. Provisions shall be made for adequate ventilation to minimize condensation under the cover.NOTE 1Extended storage of the bars at the job site should be avoided. It is recommended that coated bars be covered immediately upon arrival a
24、tthe job site.6.10 After placing, walking on coated steel reinforcing bars shall be minimized. The placement of mobile equipment shall beplanned to avoid damage to the coated bars.NOTE 2Research has shown that steel-headed vibrators cause damage to epoxy-coated steel reinforcing bars when used to co
25、nsolidate concrete. Whenconsolidating concrete reinforced with epoxy-coated bars, it is recommended that vibrators with heads made of rubber or other resilient material approvedfor concrete consolidation be used.7. Repairs7.1 Repair of Damage Incurred During Fabrication:7.1.1 All coating damage due
26、to fabrication or handling at the fabricators facility shall be repaired with patching materialmeeting the requirements of 3.1. The patching shall be performed in accordance with the written recommendations of the patchingmaterial manufacturer.7.1.2 Visible cracks, including hairline cracks without
27、bond loss (the coating cannot be easily removed with a peeling actionby the fingers of the inspector), and damage to the coating within each fabricated area of the reinforcing bar shall be repaired. Alldisbonded areas of coating shall be removed, cleaned and repaired. The cleaning shall remove loose
28、 or deleterious material, orboth. In cases where rust is present, the rust shall be removed by a thorough cleaning prior to the repair. This cleaning shall bedone by blast cleaning, filing, power brushing or other method recommended by the patching material manufacturer and approvedby the purchaser
29、in a manner that minimizes damage to the sound coating.7.1.3 When coated bars are sheared, saw-cut or cut by other means during the fabrication process, the cut ends shall be patched.7.1.4 The repairs shall be performed as soon as possible and before visible oxidation appears on the steel surface an
30、d prior toshipment to the jobsite.7.1.5 The fabricator shall be responsible for repair to the coating due to damage during fabrication and handling at thefabricators facility.7.2 Repair of Damage Incurred During Shipment and Handling at the Jobsite:D3963/D3963M 1527.2.1 Coating damage, visible to a
31、person with normal or corrected vision, incurred during shipment, storage or placement ofepoxy-coated bars at the jobsite shall be repaired with patching material meeting the requirements of 3.1.7.2.2 The contractor shall be responsible for repair to the coating due to damage during shipment, storag
32、e, or placement at thejobsite.7.2.3 The patching shall be performed in accordance with the written recommendations of the patching material manufacturer.The patching material shall be dry to the touch prior to concrete placement.7.3 The total damaged surface area (prior to repair with patching mater
33、ial), shall not exceed 2 % in any given 0.3 m 1 ft sectionof coated reinforcement. The total bar surface area covered by patching material shall not exceed 5 % in any given 0.3 m 1 ftsection of coated reinforcement. This limit on damaged and repaired area shall not include sheared or cut ends.8. Rej
34、ection8.1 Coated bars that do not meet the requirements of this specification shall be rejected.9. Field Sampling9.1 The purchaser or their representative shall have the right to select samples of the coated reinforcement to be used in theproject at the jobsite for testing on site or at the purchase
35、rs facility.10. Keywords10.1 coating requirements; concrete reinforcement; corrosion resistance; epoxy coating; fabrication repair; field repair; steelbarsANNEX(Mandatory Information)A1. QUALIFICATION OF PATCHING MATERIAL USED TO REPAIR ORGANIC COATINGS FOR STEEL REINFORCINGBARSA1.1 ScopeA1.1.1 This
36、 specification covers qualification requirements for patching materials used to repair barrier organic coatings such asepoxy powder coatings used for protecting steel reinforcing bars from corrosion.A1.2 Coating Patching MaterialA1.2.1 A minimum of 0.5 L 1 pt of patching material, compatible with th
37、e coating and inert in concrete, shall be submitted tothe testing agency. The material shall be feasible for repairs to the coated reinforcing bars damaged by handling. The product nameand a description of the patching material shall be given in the test report. A complete list of powder coating mat
38、erials (productnames and manufacturers) for which the patching material has been approved for use with shall be provided and included in thetest report.A1.3 Test SpecimensA1.3.1 The following test specimens shall be submitted as a minimum for test:A1.3.1.1 Four free films of coating patching materia
39、l with a thickness within 625 m 61 mil of the patching materialmanufacturers minimum recommended patching material coating application thickness.A1.3.1.2 Six 75 by 150 mm 3 by 6 in. by 3 mm 18 in. flat panels that have been blast cleaned and coated on both sides with175 to 300 m 7 to 12 mils of epox
40、y powder coating in accordance with the powder coating manufacturers written instructions.The hanger marks on the panels shall be sealed with silicone or other suitable sealant.A1.3.2 Adescription of the sample preparation process for the free films and flat panel samples (for example, the number of
41、 coatsD3963/D3963M 153of patch material applied to the intentional coating defect to achieve the minimum required coating thickness), used in thisprequalification evaluation shall be provided in the test report. The patching material manufacturer shall specify the minimumrecommended patching materia
42、l coating application thickness to be used. In addition, the patching material manufacturer shallspecify the method of metal surface preparation and the patching application procedures.These procedures and minimum thicknessshall be followed by the testing agency to prepare the coated metal specimens
43、 for test and shall be listed in the test report.A1.4 Patching Material RequirementsA1.4.1 Chloride PermeabilityThe chloride permeability characteristics of the patching material shall be measured on two testfilms and a control film at 24 6 2C 75 6 3.6F for 45 days. The permeability cells shall be o
44、f the type shown in Fig. A1.1.Films selected for testing shall be carefully handled and examined for any defects prior to installation in the cell. The cell shallconsist of two glass compartments separated by a coating film sandwiched between two glass plates, each having a centered 25-mm1-in. hole.
45、 One compartment shall contain 175 mL 5.3 oz. of 3M NaCl and the other 115 mL 3.5 oz of distilled water. Theactivity of chloride ions passing through the film shall be measured using a specific ion meter equipped with a chloride electrodeand a double junction electrode. Activity measurements shall b
46、e converted into concentration values of mole per L M with aconversion diagram, constructed by plotting measured chloride ion activities versus known chloride ion concentrations. Theaccumulative concentration of chloride ions permeating through the film shall be less than 1 104 M.A1.4.2 Salt Spray R
47、esistanceThe resistance of the patching material to a hot, wet corrosive environment shall be evaluated inaccordance with Practice B117. Three coated 75 by 150 mm 3 by 6 in. by 3 mm 18 in. flat panels, with intentional defectsrepaired with the patching material, shall be exposed to 35 6 2C 95 6 3.6F
48、 salt spray comprised of 5 % NaCl by massdissolved in distilled water for 400 6 10 h. Each intentional defect shall be an area of 12 by 25 mm 12 by 1 in. removed fromthe center of one side of the coated panel using a grinding wheel or other suitable method. Dust and loose material shall be removedfr
49、om the intentional defect site with a clean cloth after the coatings removal. The patching material shall be prepared forapplication in accordance with the written instructions of the patching material manufacturer. The patching material shall beapplied with a new paint brush to the intentional defect to form a patched area of 25 by 37 mm 1 by 1.5 in. fully covering theintentional defect. The coated panel shall be lying flat on a table during the patching material application and shall remain in sucha position until the
