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    ASTM A1055 / A1055M - 16

    Standard Specification for Zinc and Epoxy Dual-Coated Steel Reinforcing Bars

    Active Standard ASTM A1055 / A1055M | Developed by Subcommittee: A01.05

    Book of Standards Volume: 01.04

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    This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc alloy and an epoxy coating. The zinc alloy layer shall be applied by the thermal spray coating method followed by an epoxy coating, which shall be applied by the electrostatic spray method. The zinc coating shall conform to the required chemical composition for aluminum, cadmium, copper, iron, lead, tin, antimony, silver, bismuth, arsenic, nickel, magnesium, titanium, and zinc. The coated steel reinforcing bars shall conform to bend test requirements and to physical properties such as coating thickness, coating continuity, epoxy coating flexibility, and coating adhesion.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    1. Scope

    1.1 This specification covers deformed and plain steel reinforcing bars with a dual coating of zinc-alloy followed by an epoxy 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) or zinc-alloy applied in accordance with Specification A1094/A1094M (Type II).

    Note 1: The coating applicator is identified throughout this specification as the manufacturer.

    1.3 Requirements for the zinc coating are contained in
    Table 1.

    (A) UNS designations were established in accordance with Practice E527.
    (B) In accordance with ANSI/AWS A5.33.
    (C) The following applies to all specified limits in this table. For the purposes of determining conformance with this specification, an observed value obtained from analysis shall 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 option.

    1.4 Requirements for epoxy powder coatings are contained in Annex A1.

    1.5 Guidelines for construction practices at the job-site are presented in Appendix X1.

    1.6 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.

    1.7 This specification is applicable for orders in either inch-pound units [as Specification A1055] or SI units [as Specification A1055M].

    1.8 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, except as specifically noted in Table 2. Combining values from the two systems may result in non-conformance with this specification.

    (A) Pin diameters specified for similar size (shown on the same line) inch-pound bars and metric may be interchanged.
    (B) Bar designation Nos. 9, 10, 11, 14, and 18 [29, 32, 36, 43, and 57] are not covered by Specification A996/A996M.

    1.9 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this specification to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement

    A706/A706M Specification for Deformed and Plain Low-Alloy Steel Bars for Concrete Reinforcement

    A775/A775M Specification for Epoxy-Coated Steel Reinforcing Bars

    A944 Test Method for Comparing Bond Strength of Steel Reinforcing Bars to Concrete Using Beam-End Specimens

    A996/A996M Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement

    A1094/A1094M Specification for Continuous Hot-Dip Galvanized Steel Bars for Concrete Reinforcement

    B117 Practice for Operating Salt Spray (Fog) Apparatus

    B833 Specification for Zinc and Zinc Alloy Wire for Thermal Spraying (Metallizing) for the Corrosion Protection of Steel

    D4060 Test Method for Abrasion Resistance of Organic Coatings by the Taber Abraser

    D4417 Test Methods for Field Measurement of Surface Profile of Blast Cleaned Steel

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

    G14 Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)

    G20 Test Method for Chemical Resistance of Pipeline Coatings

    G62 Test Methods for Holiday Detection in Pipeline Coatings

    American Welding Society


    AWSC2.25/C2.25M Specification for Thermal Spray FeedstockSolid and Composite Wire and Ceramic Rods

    American Concrete Institute Standard

    ACI 301 Specifications for Structural Concrete

    Society for Protective Coatings Specifications

    SSPC-PA 2 Measurement of Dry Coating Thickness with Magnetic Gages

    SSPC-SP 10 Near-White Blast Cleaning

    SSPC-VIS 1 Pictorial Surface Preparation Standards for Painting Steel Surfaces

    ICS Code

    ICS Number Code 25.220.40 (Metallic coatings); 25.220.60 (Organic coatings)

    UNSPSC Code

    UNSPSC Code 30103623(Reinforcing bar or rebar or mesh)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/A1055_A1055M-16

    Citation Format

    ASTM A1055 / A1055M-16, Standard Specification for Zinc and Epoxy Dual-Coated Steel Reinforcing Bars, ASTM International, West Conshohocken, PA, 2016, www.astm.org

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