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.
|Published (Last):||22 September 2011|
|PDF File Size:||16.8 Mb|
|ePub File Size:||15.88 Mb|
|Price:||Free* [*Free Regsitration Required]|
Finally, there are requirements for passivating the material chromating to asrm reaction between concrete and the zinc coating, and on bend diameters. The specification outlines three acceptable forms of touch-up: Number 12 and smaller bar must have a minimum of 3.
It may also be known by its trade name, e. A retest shall be provided if the average zinc coating mass fails to meet the requirements. The galvanizer is identified throughout this specification as the manufacturer. If rebar is bent fabricated after the galvanized coating is applied and any flaking or cracking occurs, it is not rejectable.
ASTM Specifications | American Galvanizer’s Association
These notes and footnotes excluding those in tables shall not be considered as requirements of the specification. 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 be used to prepare reinforcing bars. LME grade, special high grade, high grade, intermediate grade, and prime western grade.
The following is a summary of the various pertinent hot-dip galvanizing specifications. Anyone making use of this information assumes all liability arising from such use. Purchase a copy from the AGA, or contact your local galvanizer.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
The requirements in the specification facilitate the production of a high-quality zinc coating and are similar to those found in A and Atsm The purpose of the calculation is to provide justification for the purchase of a higher initial cost system with a low life-cycle cost over an initially less expensive coating which has high future costs.
The galvanized coating shall be chromate treated. This specification covers rolled steel structural shapes for use in building framing or bridges, or for general structural purposes. Unique to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate sstm immediately after the process. The galvanizer shall be permitted to subject the newly coated steel xstm bars to air or steam wiping to remove excess zinc from the bars.
This test method deals with the standard procedures for establishing the relative bond strength of steel reinforcing bars in concrete using beam-end specimens.
ASTM A767/A767M – 16
It is important to note reinforcing steel used in conjunction with structural steel, welded to a fabricated assembly is not governed by ASTM A but rather ASTM A, the standard specification for zinc coatings on iron and steel products. Link to Active This link will always route to the current Active version of the standard. This specification covers prime western grade-recycled PWG-R zinc made by recycling zinc secondary materials including but not limited to drosses and skimmings.
They can only be used if the electrical conductivity of the coating differs significantly from that of the substrate. The values stated in each system may not be exact equivalents.
It is the responsibility of the designer and fabricator to ensure the product has been properly astk and built before the hot-dip galvanizing process supporting specifications. The LCC analysis considers not only the initial cost of the system but also the future costs maintenance, replacement, etc. This specification covers zinc metal made from ore or other material by a process of distillation or by electrolysis in five grades as follows: Stripping method, weighing before and after galvanizing, and microscopy method shall be used to referee the results obtained by magnetic thickness measurements.
Finally, the adherence requirement is for the entire coating to have a strong adherence throughout the service life of the galvanized steel. Heat analysis shall be used to determine the percentage of carbon, manganese, phosphorus, sulfur, vanadium, nickel, chromium, molybdenum, columbium, and copper for the required chemical composition. There are coating thickness minimums, aetm no maximums, and the threads are not subject to the coating thickness requirement.
Historical Version s – view previous versions of standard. The requirements for finish, appearance, and adherence are identical to those in the other main standards. The adherence requirement is the same as A, for strong bond throughout the life of the hot-dip galvanized steel.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
This cold working of the bars causes induced stresses that may be released after the bars are immersed in the molten F zinc bath. Was this answer helpful? Steel materials and nuts shall be manufactured, processed, and formed as appropriate for their respective grades. 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.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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 miscellaneous threaded objects that will be centrifuged, spun, or otherwise handled to remove the excess zinc.
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. See Specifying Duplex Systems for more information. The mass of the coating shall be determined by magnetic thickness gage measurements. Standard Specification for Zinc.
Assemblies should consist of elements of similar chemistry and surface condition. Any combination of these products can be assembled into a single fabrication and then hot-dip galvanized.
Specification for Structural Steel.
Whenever different analyses of steel or different surfaces of steel are united in an assembly the galvanized finish is not generally uniform in appearance. The design of the product and selection of proper steel for its suitability to withstand normal galvanizing operations is the responsibility of the designer and fabricator.
Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: The mass of zinc coating shall conform to specified requirements. Common distorted and warped members of assemblies are sheets or plates assembled by welding or riveting.