• ASTM D 7957/D7957M : 2017

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Standard Specification for Solid Round Glass Fiber Reinforced Polymer Bars for Concrete Reinforcement

    Available format(s):  Hardcopy, PDF

    Superseded date:  24-03-2022

    Language(s):  English

    Published date:  22-09-2017

    Publisher:  American Society for Testing and Materials

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    Abstract - (Show below) - (Hide below)

    CONTAINED IN VOL. 15.03, 2017 Defines glass fiber reinforced polymer (GFRP) bars, provided in cut lengths and bent shapes and having an external surface enhancement for concrete reinforcement.

    Scope - (Show below) - (Hide below)

    1.1This 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.

    1.2Bars produced according to this standard are qualified using the test methods and must meet the requirements given by 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.

    TABLE 1 Property Limits and Test Methods for QualificationA

    Property

    Limit

    Test Method

    Mean Glass Transition Temperature

    Midpoint temperature 100 °C [212 °F]

    ASTM E1356

    Mean Degree of Cure

    95 %

    ASTM E2160

    Mean Measured Cross-Sectional Area

    Table 3

    ASTM D7205/D7205M, subsection 11.2.5.1

    GuaranteedB Ultimate Tensile Force

    Table 3

    ASTM D7205/D7205M

    Mean Tensile Modulus of Elasticity

    44,800 MPa [6 500 000 psi]

    ASTM D7205/D7205M

    Mean Ultimate Tensile Strain

    1.1 %

    ASTM D7205/D7205M

    GuaranteedB Transverse Shear Strength

    131 MPa [19 000 psi]

    ASTM D7617/D7617M

    GuaranteedB Bond Strength

    7.6 MPa [1100 psi]

    ASTM D7913/D7913M

    Mean Moisture Absorption to Saturation

    1.0 % to saturation at 50 °C [122 °F]

    ASTM D570, subsection 7.4

    Mean Alkaline Resistance

    80 % of initial mean ultimate tensile force following 90 days at 60 °C [140 °F]

    ASTM D7705/D7705M, Procedure A

    GuaranteedB Ultimate Tensile Force of Bent Portion of Bar

    60 % of the values in Table 3

    ASTM D7914/D7914M

    (A)For the determination of the mean and guaranteed properties, at least 24 samples shall be obtained in groups of eight or more from three or more different production lots. The mean and guaranteed properties shall satisfy the limits.
    (B)Guaranteed property is defined in 3.2.5.

    TABLE 2 Property Limits and Test Methods for Quality Control and CertificationA,B

    Property

    Limit

    Test Method

    Fiber Mass Content

    70 %

    ASTM D2584 or ASTM D3171

    Glass Transition Temperature

    Midpoint temperature 100 °C [212 °F]

    ASTM E1356

    Degree of Cure

    95 %

    ASTM E2160

    Measured Cross-Sectional Area

    Table 3

    ASTM D7205/D7205M, subsection 11.2.5.1

    Ultimate Tensile Force

    Table 3

    ASTM D7205/D7205M

    Tensile Modulus of Elasticity

    44 800 MPa [6 500 000 psi]

    ASTM D7205/D7205M

    Ultimate Tensile Strain

    1.1 %

    ASTM D7205/D7205M

    Moisture Absorption in 24 h

    0.25 % in 24 h at 50 °C [122 °F]

    ASTM D570, subsection 7.4

    (A)For the determination of each of the property limits, five random samples shall be obtained from each production lot. Each individual sample shall satisfy the property limits.
    (B)For bent bars, the tests are performed on the straight portion of the bars.

    TABLE 3 Geometric and Mechanical Property Requirements

    Bar
    Designation
    No.

    Nominal Dimensions

    Measured Cross-Sectional Area Limits
    mm2 [in.2]

    Minimum
    Guaranteed
    Ultimate
    Tensile Force
    kN [kip]

    Diameter
    mm [in.]

    Cross-Sectional Area
    mm2 [in.2]

    Minimum

    Maximum

    M6 [2]

    6.3 [0.250]

    32 [0.049]

    30 [0.046]

    55 [0.085]

    27 [6.1]

    M10 [3]

    9.5 [0.375]

    71 [0.11]

    67 [0.104]

    104 [0.161]

    59 [13.2]

    M13 [4]

    12.7 [0.500]

    129 [0.20]

    119 [0.185]

    169 [0.263]

    96 [21.6]

    M16 [5]

    15.9 [0.625]

    199 [0.31]

    186 [0.288]

    251 [0.388]

    130 [29.1]

    M19 [6]

    19.1 [0.750]

    284 [0.44]

    268 [0.415]

    347 [0.539]

    182 [40.9]

    M22 [7]

    22.2 [0.875]

    387 [0.60]

    365 [0.565]

    460 [0.713]

    241 [54.1]

    M25 [8]

    25.4 [1.000]

    510 [0.79]

    476 [0.738]

    589 [0.913]

    297 [66.8]

    M29 [9]

    28.7 [1.128]

    645 [1.00]

    603 [0.934]

    733 [1.137]

    365 [82.0]

    M32 [10]

    32.3 [1.270]

    819 [1.27]

    744 [1.154]

    894 [1.385]

    437 [98.2]

    1.3The 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.

    1.4The following FRP materials are not covered by this specification:

    1.4.1Bars made of more than one load-bearing fiber type (that is, hybrid FRP).

    1.4.2Bars having no external surface enhancement (that is, plain or smooth bars, or dowels).

    1.4.3Bars with geometries other than solid, round cross sections.

    1.4.4Pre-manufactured grids and gratings made with FRP materials.

    1.5This specification is applicable for either SI (as Specification D7957M) or inch-pound units (as Specification D7957).

    1.6The 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.

    1.7This 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.

    1.8This 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 Product Information - (Show below) - (Hide below)

    Committee D 30
    Document Type Standard
    Publisher American Society for Testing and Materials
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    ASTM D 4762 : 2018 Standard Guide for Testing Polymer Matrix Composite Materials
    ASTM C 1903 : 2021 Standard Specification for Precast Concrete Duct Bank
    ASTM D 7914/D7914M : 2021 Standard Test Method for Strength of Fiber Reinforced Polymer (FRP) Bent Bars in Bend Locations
    ASTM D 7205/D7205M : 2021 Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars

    Standards Referencing This Book - (Show below) - (Hide below)

    ASTM D 3171 : 1999 Standard Test Methods for Constituent Content of Composite Materials
    ASTM E 2160 : 2004 Standard Test Method for Heat of Reaction of Thermally Reactive Materials by Differential Scanning Calorimetry
    ASTM E 2160 : 2004 : R2012 Standard Test Method for Heat of Reaction of Thermally Reactive Materials by Differential Scanning Calorimetry
    ASTM A 615/A615M : 2016-03 SPECIFICATION FOR DEFORMED AND PLAIN CARBON-STEEL BARS FOR CONCRETE REINFORCEMENT
    ASTM D 2584 : 2002 Standard Test Method for Ignition Loss of Cured Reinforced Resins
    ASTM D 3878 : 2002 : REV A Standard Terminology for Composite Materials
    ASTM D 7705/D7705M : 2012 Standard Test Method for Alkali Resistance of Fiber Reinforced Polymer (FRP) Matrix Composite Bars used in Concrete Construction
    ASTM D 3878 : 2015 Standard Terminology for Composite Materials
    ASTM D 2584 : 2008 Standard Test Method for Ignition Loss of Cured Reinforced Resins
    ASTM D 3878 : 2019 Standard Terminology for Composite Materials
    ASTM D 3878 : 2000 Standard Terminology Composite Materials
    ASTM D 2584 : 1994 Standard Test Method for Ignition Loss of Cured Reinforced Resins
    ASTM D 3171 : 2011 Standard Test Methods for Constituent Content of Composite Materials
    ASTM D 7205/D7205M : 2021 Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars
    ASTM E 1356 : 2008 Standard Test Method for Assignment of the Glass Transition Temperatures by Differential Scanning Calorimetry
    ASTM D 792 : 2013 : REDLINE Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
    ASTM D 3878 : 2003 : REV A Standard Terminology for Composite Materials
    ASTM D 2584 : 2011 Standard Test Method for Ignition Loss of Cured Reinforced Resins
    ASTM D 3878 : 2016 Standard Terminology for Composite Materials
    ASTM D 3878 : 2019 : REV A Standard Terminology for Composite Materials
    ASTM D 3878 : 2020 : REV A Standard Terminology for Composite Materials
    ASTM D 3878 : 1998 Standard Terminology Composite Materials
    ASTM D 3878 : 2018 Standard Terminology for Composite Materials
    ASTM C 904 : 1998 Standard Terminology Relating to Chemical-Resistant Nonmetallic Materials
    ASTM D 7914/D7914M : 2014 Standard Test Method for Strength of Fiber Reinforced Polymer (FRP) Bent Bars in Bend Locations
    ASTM D 3171 : 2009 Standard Test Methods for Constituent Content of Composite Materials
    ASTM D 3878 : 2002 Standard Terminology for Composite Materials
    ASTM E 1356 : 2003 Standard Test Method for Assignment of the Glass Transition Temperatures by Differential Scanning Calorimetry
    ASTM D 7205/D7205M : 2006 : R2016 Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars
    ASTM D 7913/D7913M : 2014 Standard Test Method for Bond Strength of Fiber-Reinforced Polymer Matrix Composite Bars to Concrete by Pullout Testing
    ASTM D 2584 : 1968 Standard Method Of Test For Ignition Loss Of Cured Reinforced Resins
    ASTM D 3171 : 2015 : REDLINE Standard Test Methods for Constituent Content of Composite Materials
    ASTM D 3878 : 2004 Standard Terminology for Composite Materials
    ASTM E 1356 : 2008 : R2014 Standard Test Method for Assignment of the Glass Transition Temperatures by Differential Scanning Calorimetry (Withdrawn 2023)
    ASTM E 2160 : 2004 : R2018 Standard Test Method for Heat of Reaction of Thermally Reactive Materials by Differential Scanning Calorimetry
    ASTM D 3878 : 2007 : R2013 Standard Terminology for Composite Materials
    ASTM D 3878 : 2020 : REDLINE Standard Terminology for Composite Materials
    ASTM D 3878 : 2020 Standard Terminology for Composite Materials
    ASTM D 2584 : 2018 Standard Test Method for Ignition Loss of Cured Reinforced Resins
    ASTM D 3878 : 2003 Standard Terminology for Composite Materials
    ASTM D 3878 : 2007 Standard Terminology for Composite Materials
    ASTM C 904 : 2001 Standard Terminology Relating to Chemical-Resistant Nonmetallic Materials
    ASTM E 1356 : 1998 Standard Test Method for Assignment of the Glass Transition Temperatures by Differential Scanning Calorimetry or Differential Thermal Analysis
    ASTM D 3171 : 1999 : R2004 Standard Test Methods for Constituent Content of Composite Materials
    ASTM E 2160 : 2001 Standard Test Method for Heat of Reaction of Thermally Reactive Materials by Differential Scanning Calorimetry
    ASTM D 7914/D7914M : 2021 Standard Test Method for Strength of Fiber Reinforced Polymer (FRP) Bent Bars in Bend Locations
    ASTM D 570 : 1998 : R2018 Standard Test Method for Water Absorption of Plastics
    ASTM D 3171 : 2015 Standard Test Methods for Constituent Content of Composite Materials
    ASTM D 3878 : 2004 : REV A Standard Terminology for Composite Materials
    ASTM D 3171 : 2006 Standard Test Methods for Constituent Content of Composite Materials
    ASTM D 3878 : 2001 Standard Terminology Composite Materials
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