ASTM D7958/D7958M-17
(Test Method)Standard Test Method for Evaluation of Performance for FRP Composite Bonded to Concrete Substrate using Beam Test
Standard Test Method for Evaluation of Performance for FRP Composite Bonded to Concrete Substrate using Beam Test
SIGNIFICANCE AND USE
5.1 This test method serves as a means for uniformly preparing and testing standard specimens suitable for being subject to environmental conditioning and subsequently used to evaluate FRP-bonded-to-concrete system performance, and evaluating and reporting the results.
5.2 This test method is intended for use in the laboratory.
5.3 The comparison of results from this test method conducted on identical specimens subject to different environmental conditioning protocols can be used to evaluate the effects of environmental exposure on the bond performance of FRP systems.
SCOPE
1.1 This test method describes the apparatus and procedure for evaluating the performance of wet lay-up or pultruded Fiber-Reinforced Polymer (FRP) composite systems adhesively bonded to a flat concrete substrate. The test determines the maximum force that an FRP system can bear before detaching from a concrete beam tested in flexure. Failure will occur along the weakest plane within the system composed of the FRP composite, adhesive, and concrete substrate.
1.2 This test method is used for assessment and comparison of FRP systems subject to environmental conditioning. This test method is not intended for job approval or product qualification purposes.
1.3 This test method is intended for use with adhesive-applied FRP systems and is appropriate for use with FRP systems having any fiber orientation or combination of ply orientations comprising the FRP composite, although the test condition only considers forces in the direction parallel to the beam longitudinal axis.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.4.1 Within the text, the inch-pound units are shown in brackets.
1.5 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.
1.6 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
Relations
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: D7958/D7958M − 17
Standard Test Method for
Evaluation of Performance for FRP Composite Bonded to
1
Concrete Substrate using Beam Test
This standard is issued under the fixed designation D7958/D7958M; 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 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method describes the apparatus and procedure
ization established in the Decision on Principles for the
for evaluating the performance of wet lay-up or pultruded
Development of International Standards, Guides and Recom-
Fiber-Reinforced Polymer (FRP) composite systems adhe-
mendations issued by the World Trade Organization Technical
sively bonded to a flat concrete substrate. The test determines
Barriers to Trade (TBT) Committee.
the maximum force that an FRP system can bear before
detaching from a concrete beam tested in flexure. Failure will
2. Referenced Documents
occur along the weakest plane within the system composed of
the FRP composite, adhesive, and concrete substrate.
2.1 ASTM Standards:
1.2 This test method is used for assessment and comparison C31/C31M Practice for Making and Curing Concrete Test
of FRP systems subject to environmental conditioning. This
Specimens in the Field
test method is not intended for job approval or product C33/C33M Specification for Concrete Aggregates
qualification purposes.
C39/C39M Test Method for Compressive Strength of Cylin-
drical Concrete Specimens
1.3 This test method is intended for use with adhesive-
C42/C42M Test Method for Obtaining and Testing Drilled
applied FRP systems and is appropriate for use with FRP
Cores and Sawed Beams of Concrete
systems having any fiber orientation or combination of ply
C78 Test Method for Flexural Strength of Concrete (Using
orientations comprising the FRP composite, although the test
Simple Beam with Third-Point Loading)
condition only considers forces in the direction parallel to the
C125 Terminology Relating to Concrete and Concrete Ag-
beam longitudinal axis.
gregates
1.4 The values stated in either SI units or inch-pound units
C150/C150M Specification for Portland Cement
are to be regarded separately as standard. The values stated in
C192/C192M Practice for Making and Curing Concrete Test
each system are not exact equivalents; therefore, each system
Specimens in the Laboratory
must be used independently of the other. Combining values
C511 Specification for Mixing Rooms, Moist Cabinets,
from the two systems may result in nonconformance with the
Moist Rooms, and Water Storage Tanks Used in the
standard.
Testing of Hydraulic Cements and Concretes
1.4.1 Within the text, the inch-pound units are shown in
C617 Practice for Capping Cylindrical Concrete Specimens
brackets.
D883 Terminology Relating to Plastics
1.5 This standard does not purport to address all of the
D3039 Test Method for Tensile Properties of Polymer Ma-
safety concerns, if any, associated with its use. It is the
trix Composite Materials
responsibility of the user of this standard to establish appro-
D3878 Terminology for Composite Materials
priate safety, health and environmental practices and deter-
D7565 Test Method for Determining Tensile Properties of
mine the applicability of regulatory limitations prior to use.
Fiber Reinforced Polymer Matrix Composites Used for
Strengthening of Civil Structures
E4 Practices for Force Verification of Testing Machines
1
This test method is under the jurisdiction of ASTM Committee D30 on
E6 Terminology Relating to Methods of Mechanical Testing
Composite Materials and is the direct responsibility of Subcommittee D30.10 on
E122 Practice for Calculating Sample Size to Estimate,With
Composites for Civil Structures.
Specified Precision, the Average for a Characteristic of a
Current edition approved Aug. 1, 2017. Published September 2017. DOI:
10.1520/D7958_D7958M-17. Lot or Process
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D7958/D7958M − 17
E251 Test Methods for Performance Characteristics of Me- 3.3.11 h—thickness of FRP (D3039)
tallic Bonded Resistance Strain Gages
3.3.12 K*—FRP tensile stiffness per unit width (D7565)
E456 Terminology Relating to Quality and Statistics
3.3.13 n—number of specimens
3.3.14 P—maximum applied force indicated by testing
...
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