ASTM-D7205 2006

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D7205/D7205M-06 Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars

Published By	Publication Date	Number of Pages
ASTM	2006	12

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Categories: 91.100.40 - Products in fibre-reinforced cement, ASTM

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Description

1.1 This test method determines the quasi-static longitudinal tensile strength and elongation properties of fiber reinforced polymer matrix (FRP) composite bars commonly used as tensile elements in reinforced, prestressed, or post-tensioned concrete.

Note 1

Additional procedures for determining tensile properties of polymer matrix composites may be found in test methods D 3039/D 3039M and D 3916.

1.2 Linear elements used for reinforcing Portland cement concrete are referred to as bars, rebar, rods, or tendons, depending on the specific application. This test method is applicable to all such reinforcements within the limitations noted in the method. The test articles are referred to as bars in this test method. In general, bars have solid cross-sections and a regular pattern of surface undulations and/or a coating of bonded particles that promote mechanical interlock between the bar and concrete. The test method is also appropriate for use with linear segments cut from a grid. Specific details for preparing and testing of bars and grids are provided. In some cases, anchors may be necessary to prevent grip-induced damage to the ends of the bar or grid. Recommended details for the anchors are provided in .

1.3 The strength values provided by this method are short-term static strengths that do not account for sustained static or fatigue loading. Additional material characterization may be required, especially for bars that are to be used under high levels of sustained or repeated loading.

This standard does not purport to address all of the safety problems, 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.

1.4 The values stated in either SI units or inch-pound units are to be regarded separately 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 must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

1.5 This annex describes the recommended anchor to facilitate gripping of FRP bar specimens for various types of tests performed under tensile loading. It also specifies preparation of the specimens. Other types of anchors may be used provided it is demonstrated that (a) failure of the bar occurs outside the anchors and (b) the anchors prevent excessive slip of the bar prior to tensile failure.

1.6 This annex provides recommendations for testing bars in conditions that are other than standard laboratory conditions. These conditions may include immersion in water or other aqueous solution and/or elevated temperature or moisture conditions.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents
2	Terminology Summary of Test Method Significance and Use Interferences
3	Apparatus Sampling and Test Specimens
4	Calibration Conditioning Procedure
5	Validation Calculation Report
6	Precision and Bias Keywords A1. Recommended Anchor For Testing FRP Bars Under Tension A1.1 Scope A1.2 Significance and Use
7	A1.3 Apparatus FIG. A1.1
8	A1.4 Specimen preparation A1.5 Anchor casting procedure TABLE A1.1
9	FIG. A1.2
10	FIG. A1.3
11	A2. Recommended Procedures for Testing Bars at Other than Standard Laboratory Conditions A2.1 Scope A2.2 Conditioning A2.3 Test Environment FIG. A1.4

Additional information

Standard Title	D7205/D7205M-06 Standard Test Method for Tensile Properties of Fiber Reinforced Polymer Matrix Composite Bars
Published Code	ASTM
Publication Date	2006
Pages Count	12
ICS Codes	91.100.40 - Products in fibre-reinforced cement

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ASTM-D7205 2006

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