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Asphalt testing

Asphalt binder testing

  • Dynamic shear rheometer (DSR): Two research grade DSRs with CTD to measure dynamic shear modulus and phase angle of asphalt binders at various temperatures and frequencies.
  • Asphalt binder aging ovens: Includes rolling thin film oven (RTFO), thin film oven (TFO), pressurized aging vessel (PAV), and high precision binder aging ovens.
  • Rotational viscometers: The Brookfield DV3T Extra system measures the viscosities of asphalt, including foamed asphalt, at elevated temperatures and plot real-time data.
  • Bending beam rheometers (BBR): Two BBRs measure the flexural creep stiffness and m-value of asphalt binders and mastics (mortar experiment) at cold temperatures.
  • FTIR (Fourier-transform infrared) spectroscopy: Produces IR spectrum to analyze the constituents, aging levels, and polymer contents of asphalt binders.
  • Cleveland open cup: Measures the flash point and fire point of asphalt binders.

Applicable test methods

Asphalt binder tests and standards
Test description AASHTO standards ASTM Standards
Bending beam rheometer T313 D6648
Binder aging (RTFO, PAV) T240*, R28* D2827, D6521
Binder bond strength (BBS) T361
Dynamic shear rheometer T315* D7175
Flash and fire points T48* D92
MSCR test T350 D7405*
Polymer content T302
Rotational viscometer T316* D4402
Specific gravity of asphalt binder T228* D70
Superpave PG grading M320 D6373

* Denotes WRSC is AASHTO accredited for the test method

Asphalt emulsion testing

  • Penetrometer: the automated system precisely measures the penetration of asphalt and emulsion residue.
  • Ductility and percent recovery testing machine: Measures the ductility and elastic recovery of asphalt and emulsion residue.
  • Torsional recovery apparatus: Determines the amount of elasticity that a polymer has imparted to emulsion residue.
  • Saybolt viscometer: Contains Furol and universal orifices to measure the viscosity of emulsions and oils.
  • Particle charge testing apparatus: the system identifies the cationic emulsified asphalt.
  • Emulsion residue by distillation: Determines the amount of residue and oil distillate in emulsified asphalt.

Applicable test methods

Asphalt emulsion tests and standards
Test description AASHTO standards ASTM Standards Other Standards
Bond strength (LISST) TP114
Cement mixing test T59 D6935
Coating test T59
Demulsibility T59 D6936
Ductility test T51, T300 D113
Elastic recovery test T301 D6084
Particle charge T59
Penetration test T49 D5
Residue by distillation/evaporation T59 D6997/D6934/D7497 Nev. T759
Saybolt furol viscosity T59 D7496
Settlement T59 D6930
Sieve test T59 D6933
Softening point T53 D36
Solubility T44 D2042

* Denotes WRSC is AASHTO accredited for the test method

Asphalt mixture testing

  • Asphalt mix design equipment: Includes Superpave gyratory, Hveem and Marshall Compactors. Stabilometers and Marshall Press.
  • Asphalt mixture performance tester (AMPT): Measures mechanical properties of asphalt mixtures and used for the performance tests such as FN, SCB, IDT, I-FIT, IDEAL-CT, and Overlay test.
  • Flexural beam fatigue test: Hydraulic and pneumatic flexural beam fatigue testing machines measure the fatigue life and fatigue energy of the asphalt mixtures.
  • Universal testing machine (UTM) with temperature chamber: For the performance tests of any asphalt pavement materials.
  • Texas overlay tester: The stand-alone system measures the reflective cracking and/or fatigue cracking resistance of asphalt mixtures (HMA, WMA, CIR, Overlays, etc.).
  • Uniaxial Thermal Stress and Strain Test (UTSST) apparatus: Determines the thermal viscoelastic and thermal volumetric properties of asphalt mixtures.

Applicable test methods

Asphalt mixture tests and standards
Test description AASHTO standards ASTM Standards Other Standards
Binder content (ignition, extraction) T308, T164* D5404*
Specific gravities (Parafilm, Corelok) T166*, T275, T331, T209*, T269* D1188, D2041, D3203, D6752, D6857, D2726
Dynamic modulus & FN test T378, T342 D3497
Flexural beam fatigue test T321 D7460
Mix designs (Superpave, Marshall, Hveem) M323/T321, T245, T246*, T247* D6925, D6927
Raveling test D7196
Cantabro test D7064 Tex-245-F
Repeated load triaxial (RLT) test NCHRP9-30A
Mr (asphalt mixtures, base, SG, CSB, FDR) T307 D4123
SCB, I-FIT TP105, TP124 D8044
Tensile strength ratio/ IDEAL-CT/IDT T283*/T322 D4867 FLDOT
Texas overlay test Tex-248-F
Triaxial compression test T167, T208, T296
UTSST D8303

* Denotes WRSC is AASHTO accredited for the test method

Asphalt emulsion mixture testing

  • Mix designs of emulsion mixtures: Conducts CIR, FDR, Slurry Seal, and Microsurfacing mix designs.
  • Wet abrasion testing apparatus: Measures the abrasion resistance of emulsion mixes under wet condition.
  • Cohesion tester: Measures the cure time of emulsion mixes and estimate the time required for opening to traffic.
  • Consistency testing system: Measures the consistency of the emulsion mixes.
  • Loaded wheel tester: Measures the permanent deformation and amount of excess asphalt in emulsion mixtures.
  • In-place mat density measurements: Water balloon test and sand cone test measures the in-place density of CIR layer.

Applicable test methods

Asphalt mixture tests and standards
Test description ASTM Standards Other Standards
Consistency Test D3910 TB-106
Cure time D3910 TB-139
Mix designs (CIR, FDR, Micro Surfacing, Slurry Seal) D3910 TB-111, A143
Mix time TB-113
Raveling test D7196
Sand cone test
Set time D3910 TB-139
Water balloon test
Wet stripping test TB-114
Wet track abrasion test D3910 TB-100
Excess asphalt by LWT TB-109