CUTBACK BITUMEN :
Soluble bitumen are obtained by dissolving pure bitumen in solvents or petroleum oils. The type and quality of soluble bitumen depends on the quality of the original pure bitumen, the type and amount of solvent. The higher the amount of petroleum solvents in the bitumen solution, the greater its fluidity. Lack of access to bitumen heating equipment, decomposition of bitumen at high temperatures, cooling of bitumen during operation, impossibility of its penetration into porous minerals, necessity of workers’ safety, fire and time spent, which in some cases Soluble bitumen are used. Soluble bitumen are classified based on the degree of viscosity and are divided into the following three groups according to the setting speed and the type of solvent.
Rapid Or Accelerating Bitumen (RC) :
If gasoline or other light solvents are used to dissolve pure bitumen, soluble bitumen is called quick-setting. Because the solvent in bitumen evaporates shortly after consuming soluble bitumen and the main bitumen remains.
Medium Curring Bitumen (MC) :
Medium bitumen are made by dissolving pure bitumen in kerosene, which is slower and longer than gasoline. Slab contraction joints should intersect at the openings for columns, and should intersect at the openings for columns of at least 60 to 6,000 ° C.
Slow Curring Bitumen (SC) :
In addition to dissolving pure bitumen in oil and retardant petroleum solvents, such as diesel or black oil, retardant soluble bitumen can be obtained directly from the distillation of crude oil, such as pure bitumen, from which solvent oils have not yet been separated. Complete setting of these bitumen after consumption takes a long time. In fact, these oils do not evaporate under normal climatic conditions, but cause a molecular deformation that is relatively gradual and long.