Reinforcing Fibers for Bituminous Pavement Material NJSP-17-06B Description. This work shall consist of adding a high tensile strength synthetic fiber to the bituminous mixture to be placed as specified in the contract documents. The Fiber Reinforced Asphalt Concrete (FRAC) mixture produced shall meet all Sec 403 requirements. The material properties, handling, mixing and placement of the fibers shall be in accordance with this provision. Materials. Fiber Properties. The reinforcing fibers shall contain aramid fibers and a dispersion aid that meet the following material requirements as detailed in Table 1 below: Table 1 Aramid Reinforcing Fibers Material Properties – Property Test Method Criteria Manufacturer Form Aramid Fibers Certification Manufacturer Length (in) 0.75 Certification Manufacturer Melting Temperature 800 F Certification Nominal Specific Gravity 1.44 ASTM D276 (g/cm3) Tensile Strength1 (psi) 400,000 ASTM Performance Testing. A FRAC mixture shall meet the following performance test detailed in Table 2 below. Non-aramid fiber blends will not be considered alternatives to this specification. All performance testing results from previous laboratory trial FRAC mixtures shall be submitted to the engineer along with the job mix formula. Table 2 FRAC Mixture Performance Requirements – Performance Measure Test Method Standard Requirement Aramid Dispersion Modified ASTM Dispersion Efficiency, % 85 % ≥ State Ratio (ADSR) D2172 Indirect Tensile Cracking Resistance, % AASHTO T 322 20 % increase ≥ increase Strength (IDT) or ASTM D6931 Flow Number AASHTO TP 79 35 % increase ≥ Resistance to Permanent Deformation (Rutting) Hamburg AASHTO T 324 < 3 mm Performance testing shall be from previous completed laboratory trials performed on plant mixed FRAC. Testing is not required on samples from the job mix. Performance testing shall be from laboratory trials at a fiber dosage rate equal to the rate proposed for the project. Tests must be performed by an AASHTO accredited testing lab and must be reviewed and approved by the engineer.
Reinforcing Fibers for Bituminous Pavement Material NJSP-17-06B Description. This work shall consist of adding a high tensile strength synthetic fiber to the bituminous mixture to be placed as specified in the contract documents. The Fiber Reinforced Asphalt Concrete (FRAC) mixture produced shall meet all Sec 403 requirements. The material properties, handling, mixing and placement of the fibers shall be in accordance with this provision. Materials. Fiber Properties. The reinforcing fibers shall contain aramid fibers and a dispersion aid that meet the following material requirements as detailed in Table 1 below: Table 1 – Aramid Reinforcing Fibers Material Properties Property Test Method Criteria Form Manufacturer Certification Aramid Fibers Length (in) Manufacturer Certification 0.75 Melting Temperature Manufacturer Certification 800 F Nominal Specific Gravity (g/cm3) ASTM D276 1.44 Tensile Strength1 (psi) ASTM 400,000 Performance Testing. A FRAC mixture shall meet the following performance test detailed in Table 2 below. Non-aramid fiber blends will not be considered alternatives to this specification. All performance testing results from previous laboratory trial FRAC mixtures shall be submitted to the engineer along with the job mix formula. Table 2 – FRAC Mixture Performance Requirements Performance Measure Test Method Standard Requirement Dispersion Efficiency, % Aramid Dispersion State Ratio (ADSR) Modified ASTM D2172 ≥ 85 % Cracking Resistance, % increase Indirect Tensile Strength (IDT) AASHTO T 322 or ASTM D6931 ≥ 20 % increase Resistance to Permanent Deformation (Rutting) Flow Number AASHTO TP 79 ≥ 35 % increase Hamburg AASHTO T 324 < 3 mm Performance testing shall be from previous completed laboratory trials performed on plant mixed FRAC. Testing is not required on samples from the job mix. Performance testing shall be from laboratory trials at a fiber dosage rate equal to the rate proposed for the project. Tests must be performed by an AASHTO accredited testing lab and must be reviewed and approved by the engineer.
NJSP1706.docx