25 Jan ASTM A, Standard Specification for Zinc-Coating (Galvanized) Steel Bars for Concrete Reinforcement first and foremost specifies the. ASTM A/AM: Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement. ASTM A – Download as PDF File .pdf), Text File .txt) or read online. ASTM A
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This abstract is a brief summary of the referenced standard. Are you still looking for the right answer? The galvanizer is identified throughout this specification as the manufacturer.
ASTM A767 – Galvanizing Steel Bars for Concrete Reinforcement – Rebar
Table 5 below gives recommendations for bend diameters based upon the bare steel bar diameter before coating. January 25, Authored by Dr. The material provided herein has been developed to provide accurate and authoritative information about after-fabrication hot-dip galvanized steel.
The galvanized coating shall be chromate treated. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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. Anyone making use of this information assumes all liability arising from such use. These notes and footnotes excluding those in tables shall not be considered as requirements of the specification.
The values stated in each system may not be exact equivalents. This specification also introduces a new requirement to the galvanized coating known as chromating. Was this answer helpful?
ASTM A for Reinforcing Steel | American Galvanizer’s Association
Link to Active This link will always route to the current Active version of the standard. Leave this field blank. However, wire is not included. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: This specification covers steel reinforcing bars with protective zinc coatings applied by dipping the properly prepared reinforcing bars into a molten bath of zinc. Steel reinforcing bars bent cold prior to hot-dip galvanizing should be fabricated to a bend diameter equal to or greater than the specified values.
A retest shall be provided if the average zinc coating mass fails to meet the requirements.
ASTM A – Galvanizing Steel Bars | American Galvanizer’s Association
Galvanization shall be used to prepare reinforcing bars. The specification also calls out specific recommended before galvanizing bending radii. This cold working a77 the bars causes induced stresses that may be released after the bars are immersed in the molten F zinc bath. 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.
Work Item s – proposed revisions of this standard. However, this single product specification introduces a few new requirements that apply astn to hot-dip galvanized rebar. 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. In addition, since rebar is handled frequently during its installation, any tears or sharp spikes that make the material dangerous to handle are grounds for rejection.
In order to help prevent and suppress this reaction, hot-dip galvanized rebar is dipped into a dilute chromate quench solution after being removed from the galvanizing kettle. Number 12 and smaller bar must have a minimum of 3.
ASTM A767 for Reinforcing Steel
A677 to this specification is also the requirement the galvanized bars be immersed in a heated, sodium dichromate solution immediately s767 the process. The mass of zinc coating shall conform to specified requirements. As this evolved hydrogen gas travels through the concrete matrix toward the surface, voids can be created which weaken the bonding with the concrete or disturb the smoothness of the concrete surface.
Historical Version s – view previous versions of standard. Newly galvanized steel can react with wet concrete and potentially form hydrogen gas as a product.