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ASTM D8505/D8505M-23

(Specification)

Standard Specification for Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for Concrete Reinforcement

Standard Specification for Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for Concrete Reinforcement

SCOPE
1.1 This specification covers basalt and glass fiber reinforced polymer (BFRP and GFRP, respectively) bars, provided in straight (longitudinal) cut lengths, of solid round cross-section, and having a surface enhancement for internal concrete reinforcement applications. Bars covered by this specification shall meet the requirements for geometric, material, mechanical, and physical properties as described herein.  
1.2 Subsection 1.6 defines the type of FRP bars that are out of the scope of this specification.  
1.3 Bars produced according to this standard are qualified using the test methods and must meet the requirements given in Table 1. Quality control and certification of production lots of bars are completed using the test methods and must meet the requirements given in Table 2.  
1.4 The standard sizes and dimensions of FRP bars and their number designations are given in Table 3.    
1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification.  
1.6 The following FRP bar materials are not covered by this specification:  
1.6.1 Bars made of more than one load-bearing fiber types or different grade fibers (that is, hybrid FRP).  
1.6.2 Bars made from fibers other than glass or basalt.  
1.6.3 Bars having no external surface enhancement (that is, plain or smooth bars, or dowels).  
1.6.4 Bars with geometries other than solid, round cross sections.  
1.6.5 Pre-manufactured grids and gratings made with FRP materials.  
1.6.6 Bent bars (that is, bars that are not made of straight, continuous lengths).
Note 1: Bent bars may include stirrups and hoops. Refer Specification D7957/D7957M for GFRP bent bar specifications.  
1.7 This specification is applicable for either SI (as Specification D8505M) or US units (as Specification D8505).  
1.8 The values stated in either SI units or US units are to be regarded as standard. Within the text, the US 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.  
1.9 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.10 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Mar-2023
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
D30 - Composite Materials
Drafting Committee
D30.10 - Composites for Civil Structures
Current Stage
Ref Project

Relations

Refers
ASTM D7913/D7913M-14(2020) - Standard Test Method for Bond Strength of Fiber-Reinforced Polymer Matrix Composite Bars to Concrete by Pullout Testing
Effective Date
01-Feb-2020

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ASTM D8505/D8505M-23 - Standard Specification for Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for Concrete ReinforcementASTM D8505/D8505M-23 - Standard Specification for Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for Concrete Reinforcement
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ASTM D8505/D8505M-23 - Standard Specification for Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for Concrete Reinforcement
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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D8505/D8505M − 23
Standard Specification for
Basalt and Glass Fiber Reinforced Polymer (FRP) Bars for
1
Concrete Reinforcement
This standard is issued under the fixed designation D8505/D8505M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.6.2 Bars made from fibers other than glass or basalt.
1.6.3 Bars having no external surface enhancement (that is,
1.1 This specification covers basalt and glass fiber rein-
plain or smooth bars, or dowels).
forced polymer (BFRP and GFRP, respectively) bars, provided
in straight (longitudinal) cut lengths, of solid round cross- 1.6.4 Bars with geometries other than solid, round cross
sections.
section, and having a surface enhancement for internal con-
crete reinforcement applications. Bars covered by this specifi-
1.6.5 Pre-manufactured grids and gratings made with FRP
cation shall meet the requirements for geometric, material,
materials.
mechanical, and physical properties as described herein.
1.6.6 Bent bars (that is, bars that are not made of straight,
continuous lengths).
1.2 Subsection 1.6 defines the type of FRP bars that are out
of the scope of this specification.
NOTE 1—Bent bars may include stirrups and hoops. Refer Specification
1.3 Bars produced according to this standard are qualified D7957/D7957M for GFRP bent bar specifications.
using the test methods and must meet the requirements given in
1.7 This specification is applicable for either SI (as Speci-
Table 1. Quality control and certification of production lots of
fication D8505M) or US units (as Specification D8505).
bars are completed using the test methods and must meet the
1.8 The values stated in either SI units or US units are to be
requirements given in Table 2.
regarded as standard. Within the text, the US units are shown
1.4 The standard sizes and dimensions of FRP bars and their
in brackets. The values stated in each system are not exact
number designations are given in Table 3.
equivalents; therefore, each system shall be used independently
1.5 The text of this specification references notes and
of the other. Combining values from the two systems may
footnotes which provide explanatory material. These notes and
result in nonconformance with the specification.
footnotes (excluding those in tables) shall not be considered as
1.9 This standard does not purport to address all of the
requirements of the specification.
safety concerns, if any, associated with its use. It is the
1.6 The following FRP bar materials are not covered by this
responsibility of the user of this standard to establish appro-
specification:
priate safety, health, and environmental practices and deter-
1.6.1 Bars made of more than one load-bearing fiber types
mine the applicability of regulatory limitations prior to use.
or different grade fibers (that is, hybrid FRP).
1.10 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1
This specification is under the jurisdiction of ASTM Committee D30 on
ization established in the Decision on Principles for the
Composite Materials and is the direct responsibility of Subcommittee D30.10 on
Development of International Standards, Guides and Recom-
Composites for Civil Structures.
mendations issued by the World Trade Organization Technical
Current edition approved April 1, 2023. Published April 2023. DOI: 10.1520/
D8505_D8505M-23. Barriers to Trade (TBT) Committee.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8505/D8505M − 23
A
TABLE 1 Property Limits and Test Methods for Qualification
Property Limit Test Method
$ 100 °C [212 °F] (DSC) E1356
Mean Glass Transition Temperature
$ 110 °C [230 °F] (DMA) D7028
Mean Degree of Cure $ 95 % E2160
Mean Measured Cross-Sectional Area Table 3 D7205/D7205M, subsection 11.2.4.1
B
Guaranteed Ultimate Tensile Force Table 3
Guaranteed Ultimate Tensile Strength Report value
Mean Tensile Modulus of Elasticity $ 60 000 MPa [8 700 000 psi]
D7205/D7205M
Mean Tensile Modulus of Elasticity
Report value
(using measured Cross-Sectional Area)
Mean Ultimate Tensile Strain $ 1.1 %
Mean Transverse Shear Strength $ 152 MPa [22 000 psi] D7617/D7617M
Mean Apparent Horizontal Shear Strength $ 37.9 MPa [5 500 psi] D4475
Mean Bond Strength Table 3 D7913/D7913M
# 0.25 % in 24 hrs. at 50 °C [122 °F], and
Mean Moisture Absorp
...

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