If pavement distreses suggest weak subgrade, or if traffic levels are forcast to increase, check the strength of pavement and subgrade layers with Falling Weight Deflectomer (FWD) or Dynamic Cone Penetrometer (DCP)
Recommended
Material Sampling
Obtain materials for mix design
Required
Mix Design
Conduct mix design in accordance with contract requirements.
Required
Construction Testing
Asphalt Cement
Supplier generated COA or laboratory testing to comply with contract requirements
Recommended
Emulsified Asphalt
Supplier generated COA or laboratory testing to comply with contract requirements
Recommended
Asphalt Content
From plant produced materials using ignition furnace AASHTO T 308
Required
Additives
Supplier generated COA or laboratory testing to comply with contract requirements
Recommended
Additive Addition Rate
Verify amount of additive per mix design by meter reading
Required
Aggregate Gradation
From samples obtained prior to addition of binder
(AASHTO T 11 and T 27 or ASTM C117 and C136)
or from recovered aggregate from ignition furnace testing using AASHTO T 30
Required
Aggregate Physical Properties
Supplier generated COA or laboratory analysis
(AASHTO T 96, T 176 or ASTM C131, D2419)
Recommended
Mixture Verification
Verify material properties of mixture per mix design per contract requirements
Required
Mixture Temperature
Probe measurement or infrared temperature gun
Recommended
Control Strip
Nuclear gauge per
AASHTO T 355 (ASTM D2950) or Owner Agency equivalent
Recommended
Placement Depth of Material
Depth probe measurement
Recommended
Mat Width
Tape measurement
Recommended
Material Compacted Density
Nuclear gauge AASHTO T 355 (ASTM D2950) or Owner Agency approved method
Recommended
Post-Construction Testing
Visual Appearance
Verify there are no unacceptable defects
Required
Compacted Density
From pavement cores (AASHTO T 166)
Recommended
Surface Tolerance
10 ft. (3 m) Straight edge
Recommended
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