821.1 General Description
This section includes the requirements for asphalt cements that have been fluxed with petroleum distillates.
821.1.01 Related References
A. Standard Specifications General Provisions 101 through 150. B. Referenced Documents AASHTO T 44 AASHTO T 48 AASHTO T 49 AASHTO T 51 AASHTO T 55 AASHTO T 78 AASHTO T 79 AASHTO T 201
821.2 Materials
821.2.01 Cutback Asphalt
A. Requirements Type: Use an asphalt cement that is uniformly consistent and shows no separation or curbing. Grade: Use various grades of cutback asphalts that meet the requirements shown in Table 1 and Table 2. B. Fabrication General Provisions 101 through 150. C. Acceptance Test as follow: Test Method Water AASHTO T 55 Flash point AASHTO T 79 & T 48 Viscosity AASHTO T 201 Distillation AASHTO T 78 Ductility AASHTO T 51 Solubility AASHTO T 44 Penetration AASHTO T 49 D. Materials Warranty General Provisions 101 through 150. TABLE 1—PROPERTIES OF MEDIUM CURING CUTBACK ASPHALTS TABLE 2—PROPERTIES OF RAPID CURING CUTBACK ASPHALTS Requirements Viscosity Grade MC-30 MC-70 MC-250 MC-800 MC-3000 Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Water percent 0.2 0.2 0.2 0.2 0.2 Flash point, Cleveland Open Cup, oF (°C)
38.100
38.150
65.150
65.150 (65) Kinematic viscosity at 140 oF, centistokes (60 °C, mPa·s) 30 60 70 140 250 500 800 1600 3000 6000 Distillation test: Distillate, percentage by volume of total distillate to 680 oF (360 °C) to 437 oF (225 °C) 25 20 10 to 500 oF (260 °C) 40 70 20 60 15 55 35 15 to 600 oF (315 °C) 75 93 65 90 60 87 45 80 15 75 Residue from distillation to 680 oF (360 °C) Volume percentages of sample by difference 50 55 67 75 80 Tests on residue from distillation: Penetration, 100g, 5 sec., at 77 oF (25 °C), (dmm) 80 250 80 250 80 250 80 250 80 Ductility at 77 oF (25 °C), at 5 cm per min., (cm) 100 100 100 100 100 250 Solubility in trichloroethylene, percent by weight 99.5 99.5 99.5 99.5 99.5 Requirements Viscosity Grade RC-30 RC-70 RC-250 RC-800 RC-3000 Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Water percent 0.2 0.2 0.2 0.2 0.2 Flash point, Tagliabue Open Cup, oF (°C) 80
25.80
25.80 (25) Kinematic viscosity at 140 oF (60 °C, mPa·s) 30 60 70 140 250 500 800 1600 3000 6000 Distillation test: Distillate, percentage by volume of total distillate to 680 oF (360 °C) to 374 oF (190°C) 15 10 to 437 oF(225 °C) 55 50 35 15 to 500 oF (260 °C) 75 70 60 45 25 to 600 oF (315 °C) 90 85 80 75 70 Residue from distillation to 680 oF (360°C): Volume percentages of sample by difference 50 55 65 75 80 Tests on residue from distillation: Penetration, 100g, 5 sec., at 77 oF (25 °C), (dmm) 60 120 60 120 60 120 60 120 60 120 Ductility at 77 oF (25 °C), at 5 cm per min., (cm) 100 100 100 100 100 250 Solubility in trichloroethylene, percent by weight 99.5 99.5 99.5 99.5 99.5
Cutback Asphalt in other states
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Source: Standard Specifications for Construction of Transportation Systems, 2021 Edition. Pages 1517–1518 of 2,050. View official source ↗