ZigguratOilCutback BitumenMedium Curing

Medium Curing - MC mc30/mc70/mc250/mc800/mc3000

MC grades cutback asphalt is simply a combination of asphalt cement and petroleum solvent. Like emulsions, cutbacks are used because they reduce asphalt viscosity for lower temperature uses (tack coats, fog seals, slurry seals, stabilization material). Similar to emulsified asphalts, after cutback asphalt is applied the petroleum solvent evaporates leaving behind asphalt cement residue on the surface to which it was applied.
cutback bitumen

The use of cutback asphalts is decreasing because of:

  • Environmental regulations. Cutback asphalts contain volatile chemicals that evaporate into the atmosphere. Emulsified asphalts evaporate water into the atmosphere.
  • Loss of high energy products. The petroleum solvents used require higher amounts of energy to manufacture and are expensive compared to the water and emulsifying agents used in emulsified asphalts.

Typical Characteristics of Medium Curing – MC

MC30 – MC70 – MC250 – MC800 – MC3000

Specification

MC30

TEST METHOD RANGE
Kinematic 1 viscosity @ 60°C,e  St ASTM D1270 /AASHTOT201 30-60
Flash Point ( Tag Open- Cup), ° C ASTM D1310 / AASHTO T79 38
Residue from distillation to 360 °C, Percent volume by different ASTM D402 / AASHTO T55 50%
Viscosity at 60° C ASTM D2170 /AASHTOT201 300-1200
Penetration at 25 ° C, 100g, 5 Sec ASTM D5 / AASHTO T49 120/150
Ductility 3 at 25 ° C ASTM D113 / AASHTO T51 >100
Solubility in trichloroethylene ASTM D2402 / AAHTO T44 99.00%
Water, Percent Volume ASTM D95 / AASHTO T55 0.20%

MC70

TEST METHOD RANGE
Kinematic 1 viscosity @ 60°C,e  St ASTM D1270 /AASHTOT201 70-140
Flash Point ( Tag Open- Cup), ° C ASTM D1310 / AASHTO T79 38
Residue from distillation to 360 °C, Percent volume by different ASTM D402 / AASHTO T55 55%
Viscosity at 60° C ASTM D2170 /AASHTOT201 300-1200
Penetration at 25 ° C, 100g, 5 Sec ASTM D5 / AASHTO T49 120/150
Ductility 3 at 25 ° C ASTM D113 / AASHTO T51 >100
Solubility in trichloroethylene ASTM D2402 / AAHTO T44 99.00%
Water, Percent Volume ASTM D95 / AASHTO T55 0.20%

MC3000

TEST METHOD RANGE
Kinematic 1 viscosity @ 60°C,e  St ASTM D1270 /AASHTOT201 3000-50000
Flash Point ( Tag Open- Cup), ° C ASTM D1310 / AASHTO T79 36
Residue from distillation to 360 °C, Percent volume by different ASTM D402 / AASHTO T55 80%
Viscosity at 60° C ASTM D2170 /AASHTOT201 300-1200
Penetration at 25 ° C, 100g, 5 Sec ASTM D5 / AASHTO T49 120/150
Ductility 3 at 25 ° C ASTM D113 / AASHTO T51 >100
Solubility in trichloroethylene ASTM D2402 / AAHTO T44 99.00%
Water, Percent Volume ASTM D95 / AASHTO T55 0.20%