Procedure for Qualification of Carbon Fiber Strands
to be placed on VDOT Special Products Evaluation List (SPEL)
April 27, 2017
In order to be considered for placement on VDOT SPEL, a carbon fiber strand manufacturer must provide
information on the qualification tests listed below. VDOT Structure & Bridge, Research and Materials
will review these tests results and the values obtained on independent verification tests. These tests
results will then be compared to the initial values (acceptance range) obtained during research on carbon
fiber strands previously placed on the SPEL.
LIST AND DESCRIPTION OF VERIFICATION AND QUALIFICATION TESTS FOR
CFRP
Qualification Tests
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Glass Transition Test
Bond Test
Tensile Strength
Tensile Modulus of Elasticity
Elongation
Weight per foot
Fiber Content
Creep Rupture Test
Pull-Out Test
Beam-End Test
Creep Test
Resistance to Alkaline Environment
Verification Tests
1.
2.
3.
4.
5.
6.
7.
Glass Transition Test
Bond Test
Tensile Strength
Tensile Modulus of Elasticity
Elongation
Weight per foot
Fiber Content
METHODOLOGY FOR CFRP TESTS
1. Glass Transition Test
a. Scope
i. Indicates the suitability and consistency of the resin
b. Referenced Documents
i. ASTM E1356 Standard Test Method for Assignment of the Glass Transition
Temperatures by Differential Scanning Calorimetry
c. Test Apparatus
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i. The test apparatus shall comply with the requirements of ASTM E1356
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Glass transition temperature testing will be performed in accordance with ASTM
E1356
f. Calculations
i. Calculations will be performed in accordance with ASTM E1356
g. Performance Requirements
i. Acceptance Standard
1. ≥212°F
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ASTM E1356
2. Bond Test
a. Scope
i. Indicates the bond between the concrete and the strand
b. Referenced Documents
i. ACI 440.3R
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ACI 440.3R
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Bond testing will be performed in accordance with ACI 440.3R
f. Calculations
i. Calculations will be performed in accordance with ACI 440.3R
g. Performance Requirements
i. Acceptance Standard
1. Equivalent to steel strand or better
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ACI 440.3R
3. Tensile Strength
a. Scope
i. Indicates the guaranteed strength
b. Referenced Documents
i. ASTM D7205 Standard Test Method for Tensile Properties of Fiber Reinforced
Polymer Matrix Composite Bars
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ASTM D7205
d. Test Specimens
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i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Tensile Modulus of Elasticity testing will be performed in accordance with
ASTM D7209
f. Calculations
i. Calculations will be performed in accordance with ASTM D7205
g. Performance Requirements
i. Acceptance Standard
1. ≧ 2.30 kN/mm^2
2. ≧ 340 ksi
ii. Reported Test Result Range
1. 2.42～2.68 kN/mm^2
h. Report
i. Reporting will be performed in accordance with ASTM D7205
4. Tensile Modulus of Elasticity
a. Scope
i. Indicates the rigidity of the strand
b. Referenced Documents
i. ASTM D7205 Standard Test Method for Tensile Properties of Fiber Reinforced
Polymer Matrix Composite Bars
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ASTM D7205
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Tensile Modulus of Elasticity testing will be performed in accordance with
ASTM D7209
f. Calculations
i. Calculations will be performed in accordance with ASTM D7205
g. Performance Requirements
i. Acceptance Standard
1. 155 kN/mm^2
2. 22481ksi
ii. Reported Test Result Range
1. 135～160 kN /mm^2
h. Report
i. Reporting will be performed in accordance with ASTM D7205
5. Elongation
a. Scope
i. Indicates the degree of plastic deformation of the strand upon fracture.
b. Referenced Documents
i. ASTM D7205 Standard Test Method for Tensile Properties of Fiber Reinforced
Polymer Matrix Composite Bars
c. Test Apparatus
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i. The test apparatus shall comply with the requirements of ASTM D7205
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Tensile Modulus of Elasticity testing will be performed in accordance with
ASTM D7209
ii. A two inch gauge length shall be used during testing
f. Calculations
i. Calculations will be performed in accordance with ASTM D7205
g. Performance Requirements
i. Acceptance Standard
1. ≧1.3 %
ii. Reported Test Result Range
1. 1.5～2.0 %
h. Report
i. Reporting will be performed in accordance with ASTM D7205
6. Weight per foot
a. Scope
i. Indicates change or uniformity of the strand
b. Referenced Documents
i. VTM 139
c. Test Apparatus
i. The test apparatus shall comply with the requirements of VTM 139
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Weight per foot testing will be performed in accordance with VTM 139
f. Calculations
i. Calculations will be performed in accordance with VTM 139
g. Performance Requirements
i. Acceptance Standard
1. 221 g/m
2. 0.148 lb/ft
ii. Reported Test Result Range
1. 217～226 g/m
h. Report
i. Reporting will be performed in accordance with VTM 139
7. Fiber Content
a. Scope
i. Indicates the quantity of fiber to matrix
b. Referenced Documents
i. ASTM D2584 Standard Test Method for Ignition Loss of Cured Reinforced
Resins
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ii. ASTM D3171 Standard Test Methods for Constituent Content of Composite
Materials
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ASTM D2584 or
D3171
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Weight per foot testing will be performed in accordance with VTM 139
f. Calculations
i. Calculations will be performed in accordance with ASTM D2584 or D3171
g. Performance Requirements
i. Acceptance Standard
1. >55% - volume or >70% - weight
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ASTM D2584 or D3171
8. Creep Rupture Test
a. Scope
b. Referenced Documents
i. ASTM D7337 Standard Test Method for Tensile Creep Rupture of Fiber
Reinforced Polymer Matrix Composite Bars
c. Test Apparatus
d. Test Specimens
e. Procedure
f. Calculations
g. Performance Requirements
i. Acceptance Standard
1. For information only
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ASTM D7337
9. Pull-Out Test
a. Scope
i. Indicates the bond between the concrete and the strand
b. Referenced Documents
i. ACI 440.3R
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ACI 440.3R
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
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i. Bond testing will be performed in accordance with ACI 440.3R
ii. w/concrete strength at time of test +/- 500 psi of f’c
f. Calculations
i. Calculations will be performed in accordance with ACI 440.3R
g. Performance Requirements
i. Acceptance Standard
1. Equivalent to steel strand or better
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ACI 440.3R
10. Beam-End Test
a. Scope
i. Indicates the effect of curvatures on the strength loss of the strand
b. Referenced Documents
i. ACI 440.3R
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ACI 440.3R
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Bond testing will be performed in accordance with ACI 440.3R
ii. w/concrete strength at time of test +/- 500 psi of f’c
f. Calculations
i. Calculations will be performed in accordance with ACI 440.3R
g. Performance Requirements
i. Acceptance Standard
1. Equivalent to steel strand or better
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ACI 440.3R
11. Creep Test
a. Scope
i. Indicates the load for a time dependent deformation
b. Referenced Documents
i. ASTM D7337 Standard Test Method for Tensile Creep Rupture of Fiber
Reinforced Polymer Matrix Composite Bars
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ASTM D7337
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Creep testing will be performed in accordance with ASTM D7337
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f.
Calculations
i. Calculations will be performed in accordance with ASTM D7337
g. Performance Requirements
i. Acceptance Standard
1. Creep failure load ratio at 1million hours = 0.85
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with ASTM D7337
12. Resistance to Alkaline Environment
a. Scope
i. Indicates the durability of the strand exposed to alkaline environment.
b. Referenced Documents
i. ASTM D7705 Standard Test Method for Alkali Resistance of Fiber Reinforced
Polymer (FRP) Matrix Composite Bars used in Concrete Construction
c. Test Apparatus
i. The test apparatus shall comply with the requirements of ASTM D7705
d. Test Specimens
i. Testing shall be performed on 0.6-in. diameter specimens.
e. Procedure
i. Creep testing will be performed in accordance with ASTM D7705
1. King wire will be submerged in alkaline solution of pH 13.
2. Kept at 150*F the first 24 hours and then at room temperature thereafter.
3. At 2 weeks, it will be tested
f. Calculations
i. Calculations will be performed in accordance with ASTM D7705
g. Performance Requirements
i. Acceptance Standard
1. For information only
ii. Reported Test Result Range
1.
h. Report
i. Reporting will be performed in accordance with D7705
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