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This specification covers ASTM Specification low-relaxation Grade 250 and Grade 270 seven-wire prestressing steel strand with protective fusion-bonded epoxy coating applied by the electrostatic deposition method or other method that will meet the coating requirements in Section 8, and, except as allowed by 1.2, with the interstices of the seven wires filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
Formerly under the jurisdiction of Committee A01 on Steel, Stainless Steel and Related Alloys, this specification was withdrawn in January 2019 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
1.1 This specification covers ASTM Specification A416/A416M low-relaxation Grade 250 and Grade 270 seven-wire prestressing steel strand with protective fusion-bonded epoxy coating applied by the electrostatic deposition method or other method that will meet the coating requirements in Section 8, and, except as allowed by 1.2, with the interstices of the seven wires filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
Note 1—The manufacturer as identified throughout this specification is the coating applicator.
1.2 Upon special request by the purchaser, the interstices are left unfilled.
Note 2—Unfilled strand can corrode from the inside and its application for prestressing tendons in concrete or for rock and soil anchors is not recommended.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A882) or SI units [as Specification A882M].
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A416/A416M Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete
B117 Practice for Operating Salt Spray (Fog) Apparatus
D968 Test Methods for Abrasion Resistance of Organic Coatings by Falling Abrasive
G12 Test Method for Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel
G14 Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)
G20 Test Method for Chemical Resistance of Pipeline Coatings
Federal Highway Administration ReportFHWA-RD-74-18 Nonmetallic Coatings for Concrete Reinforcing Bars (February 1974) Available from National Technical Information Service (NTIS), 5285 Port Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
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ASTM A882 / A882M-04a(2010), Standard Specification for Filled Epoxy-Coated Seven-Wire Prestressing Steel Strand (Withdrawn 2019), ASTM International, West Conshohocken, PA, 2010, www.astm.orgBack to Top