1.1 This specification covers glass-fiber-reinforced polymer (GFRP) bars provided in cut lengths and bent shapes and having an external surface enhancement for concrete reinforcement. Bars covered by this specification shall meet the requirements for geometric, material, mechanical, and physical properties described herein. 1.2 Bars produced according to this specification are qualified using the test methods and shall meet the requirements given by Table 1. Quality control and certification of production lots of bars are completed using the test methods and shall meet the requirements given in Table 3. 1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification. 1.4 The following FRP materials are not covered by this specification: 1.4.1 Bars made of more than one load-bearing fiber type (that is, hybrid FRP); 1.4.2 Bars having no external surface enhancement (that is, plain or smooth bars, or dowels); 1.4.3 Bars with geometries other than solid, round cross sections; and 1.4.4 Pre-manufactured grids and gratings made with FRP materials. 1.5 This specification is applicable for either SI (as Specification DXXYYM) or inch-pound units (as Specification DXXYY). 1.6 Units--The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. 1.7 This standard 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 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard will be used by the architects, engineers, contractors, and building and bridge owners that specify composite FRP bars in civil structures. It is of considerable importance in standardizing and subsequently advancing the market for these products.
KeywordsFRP concrete reinforcement; composites for civil structures
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Ballot Item Approved as D7957/D7957M-2017 and Pending Publication