Cutback bitumen MC70 is dissolved of bitumen in solvents of kerosene. In many countries kerosene and other volatile petroleum derived products are added as a cutter or cutback agent to bitumen to reduce (or cutback) the viscosity of the bitumen. The mixture obtained may be called cutback bitumen.
The reduction in viscosity of the bitumen aids the construction of seal coats in road pavements as the softened mixture wets the chips more easily. The cutback agent evaporates from the seal coat, the cutback agent becoming a negligible component of the seal coat a few months after application. If significant amounts of the cutback agent remain in the seal coat an unwanted long term softening effect may result.
Cutback agents are used to lower the viscosity of bitumen when it is applied as a primer to the surface of a road pavement aggregate base course or substrate. Kerosene is used as a bitumen cutback agent at different concentrations according to local conditions and requirements.
The cutback bitumen is ideal for prime coat and cold applied because of easy uses and no need to thinning and heating. Cutback bitumen MC70 consist of initial incorporation of asphalt into the surface of non-asphalt based course preparatory to any superimposed treatment of construction.
The cutback asphalt MC70 applying to waterproofing of surfaces, plug capillary voids, coat and bond loose mineral particles.
MC-70 is a cutback bitumen which is a penetration bitumen asphalt blended with kerosene. Kerosene and other petroleum derived products are added as cutback agents reducing the viscosity. Mc-70 means solvent is medium caring which express that the solvent will vapor at medium speed. During applying the MC-70 cutback bitumen, the solvent evaporates so the residue demonstrate perfect adhesion. The bituminous cutback asphalt MC-70 is recommended to use for road construction.
Guaranty/warranty of cutback asphalt MC70: ATDM guaranty the quality of cutback MC70 with arrangement of international inspector to check quality and quantity of the bitumen on each shipment during the loading to vessel and controlling the production by QC team via batch test report before shipping. ATDM guaranty the quality to meet with ASTM/EN 15322:2009.
bitumen MC30 |
Test method |
Unit |
Specifications |
| Kinematic Viscosity at 60°C | ASTM D70 | CST | 70/140 |
| Flash point, Min | ASTM D5 | C° | 38 |
| Residue from distillation to 360°C, Min | ASTM D36 | Vol% | 55 |
| :Test on Residue from distillation | |||
| Penetration @ 25°C, 100 gm, 5 Sec | ASTM D6 | CM | 120/250 |
| Ductility @25°C, Min | ASTM D5 & D6 | CM | 100 |
| Solubility in Trichloroethylene, min | ASTM D92 | % | 99 |
| Water, Max | ASTM D4 | Vol% | 0.2 |
