Cold In-Place Recycling
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Pre-Construction Testing

Evaluation of Existing Pavement Structure If pavement distresses suggest weak subgrade, or if traffic levels are forecast to increase, check the strength of pavement and subgrade layers with Falling Weight Deflectometer FWD or Dynamic Cone Penetrometer DCP  Recommended 
Ground Penetrating Radar (GPR) Verify thickness consistency of existing asphalt and granular layers Optional
Pavement Sampling Obtain material for mix design and verify thickness of asphalt layers Required
Mix Design Conduct mix design for emulsified asphalt in accordance with CR201 or AASHTO PP 86-17 and MP 31-17. Conduct mix design for foamed asphalt in accordance with CR202. Required 
Measuring existing slope / cross fall Ensure CIR can be constructed per contract requirements Recommended

 


Construction Testing

 

Bituminous Recycling Agent Injection Rate 

Verify amount of recycling agent per mix design and accuracy of meter readings by volumetric distribution

Required

 Asphalt for Foaming 

Supplier generated COA or laboratory testing to comply with mix design parameters

Recommended

 Asphalt Temperature for Foaming 

Probe or infrared temperature gun

Required

Asphalt Foaming Properties 

Expansion Ratio and Half-life

Required

Emulsified Asphalt

Visual sieve test on site

Recommended

Emulsified Asphalt

Supplier generated COA or laboratory testing to comply with mix design parameters

Recommended

Emulsified Asphalt Temperature 

Probe or infrared temperature gun

Recommended

 Cement and Lime

Supplier generated COA

Recommended

 Cement Dry Spread Rate 

Volumetric distribution

Required

Cement and Lime Slurry Application Rate 

Volumetric distribution

Required

Lime or Cement Slurry Solids

% solids by drying or hydrometer

Recommended

Corrective Aggregate Gradation

Supplier generated COA or laboratory analysis

(AASHTO T 11 and  T 27 or ASTM C117 and C136)

Required

Corrective Aggregate Physical Properties 

Supplier generated COA or laboratory analysis

(AASHTO T 96, T 176 or  ASTM C131, D2419)

Recommended

Corrective Aggregate Addition Rate 

Volumetric distribution

Required

RAP Maximum Particle Size

AASHTO T 27

ASTM C136

Air dried or wet gradation

Required

RAP Gradation 

Air dried or wet gradation measured to No. 30 Sieve

Recommended

RAP Temperature 

Probe measurement or infrared temperature gun

Recommended

Moisture Content of Recycled Mixture 

AASHTO T 329

AASHTO T 265, ASTM D2216 or ASTM D4643

Recommended

Control Strip 

Nuclear gauge per

AASHTO T 355 (ASTM D2950) or Owner Agency equivalent

Required

Depth of Milling

Tape measurement

Recommended

Cross-slope 

4 ft. (1 m) Smart level

Recommended

Depth of Recycled Material 

Depth probe measurement

Recommended

Mat Width

Tape measurement

Recommended

Recycled Material Compacted Density 

Nuclear gauge AASHTO T 355 (ASTM D2950) or Owner Agency approved method

Required


Post-Construction Testing

Visual Appearance  Verify there are no unacceptable defects before placing surface course Required
Mat Moisture Content After Curing AASHTO T 329 or AASHTO T 265 (ASTM D2216 or ASTM D4643) Required
Surface Tolerance 10 ft. (3 m) Straight edge Recommended