ASTM A/AM. Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement is exclusively applicable to hot-dip galvanizing . ASTM A/AM: Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement. ASTM A/AMa Testing Mechanical Splices for Steel Reinforcing Bars .. ASTM A/AM Zinc-Coated (Galvanized) Steel Bars for Concrete.
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The following is a summary of the various pertinent hot-dip galvanizing specifications. It is the responsibility of the designer and fabricator to ensure the product has been properly designed and built before the hot-dip galvanizing process supporting specifications.
Work Item s – proposed revisions of this standard.
The following can cause warpage and distortion: Combining values from the two systems may result in non-conformance with this specification.
All fabricated assemblies shall be designed with vent and drain holes such that no air is trapped during immersion of the assemblies into cleaning solutions or molten zinc.
ASTM A767/A767M – 16
The values stated in each system may not be exact equivalents. This adtm working of the bars causes induced stresses that may be released after the bars are immersed in the molten F zinc bath. Leave this field blank. These notes and footnotes excluding those in tables shall not be considered as requirements of the specification.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
This specification covers cold-formed welded and seamless carbon steel round, square, rectangular, or special shape structural tubing for welded, riveted, or bolted construction of bridges and buildings, and for general structural purposes. This specification covers carbon structural steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of bridges and buildings, and for general structural purposes.
Galvanization shall aetm used to prepare reinforcing bars. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: This specification covers the requirements for hot-dip zinc coating applied to carbon steel and alloy steel bolts, screws, washers, nuts, and special threaded fasteners applied by the hot-dip coating process.
ASTM Specifications | American Galvanizer’s Association
It may also be known by its trade name, e. Standard Specification for Zinc Coating Hot-Dip on Iron and Hardware applies to hardware products such as castings, fasteners, rolled, pressed, and forged products, and atm threaded objects that will be centrifuged, spun, or otherwise handled to remove the excess zinc.
Finally, there are requirements for passivating the material chromating to prevent reaction between concrete and the zinc coating, and on bend diameters.
This test method deals with the standard procedures for establishing the relative bond strength of steel reinforcing bars in concrete using beam-end specimens. The specification outlines three acceptable forms of touch-up: The mass of zinc coating shall conform to specified requirements.
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.
Common distorted and warped members of assemblies are sheets or plates assembled by welding or riveting. Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized.
There are coating thickness asym, but no maximums, and the threads are not subject to the coating thickness requirement. The information provided herein is not intended as a representation or warranty on the part of the AGA.
Rebar is commonly bent prior to galvanizing, and the recommendations for diameter and best practices are provided in A Stripping method, weighing before and after a77, and microscopy method shall be used to referee the results obtained by ast thickness measurements.
Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately after the process. This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath sstm zinc. This test method shall determine the effects of surface preparation or condition such as bar coatings on the bond strength of deformed steel reinforcing bars to concrete.
Practice for Repair of Damaged and Uncoated Areas of HOt-Dip Galvanized Coatings covers appropriate methods used to repair damaged hot-dip galvanized coatings on hardware, structural shapes, and other hot-dip galvanized products, including uncoated areas remaining after initial hot-dip galvanizing.
This post-treatment helps to prevent the formation of wet storage stain on the bars when they are in bundles at a job site and also promotes good adhesion of the galvanized rebar to the concrete it is placed in.
Types of embrittlement commonly encountered with galvanized steel are related to aging phenomena, cold working, and absorption of hydrogen. The galvanized coating shall be chromate treated. Assemblies should consist of elements of similar chemistry and surface condition. However, the AGA does provide a compilation of specifications pertinent to galvanizing.
Eddy-current-type thickness measurement is a non-destructive test measuring variations in the impedance of an eddy-current inducing coil caused by coating thickness variations.