Bitumen Rapid Curing packing
WHAT IS RAPID CURING CUTBACK BITUMEN ?
Rapid curing cutback asphalt cement is a combination of light diluents of high volatility, generally in the gasoline or naphtha boiling point range (RC-70, 250, 800, 3000), and asphalt cement. Rapid curing cutback asphalt combinations are prepared to start from the lighter diluents, and even from the fluid of higher viscosity. The grades used for rapid curing cutback bitumen are RC-70, RC-250, RC-800, and RC-3000. Here, the value given by numbers 70, 250, 800, and 3,000 represents the kinematic viscosity of the bitumen given in centistokes. The solvent concentration of rapid curing asphalt is 15-45% of the volume of asphalt cement used. Mainly two tests are conducted on cut-back asphalt and are given as 1) residue and 2) cutback test. The testing of residue focuses on examination of penetration, ductility, and solubility. The testing of cutback bitumen includes the distillation, viscosity, and flash point tests. The degree of liquidity developed in each case depends principally on the proportion of solvent to asphalt cement. To a minor degree, the liquidity of the cutback may be affected by the hardness of the base asphalt from which the cutback is made. The degree of fluidity results in several grades of cutback asphalt—some quite fluid at ordinary temperatures and others somewhat more viscous. The more viscous grades may require a small amount of heating to make them fluid enough for construction operations. Asphalt cutbacks use petroleum solvents for dissolving asphalt cement. The solvents are variously called distillate, diluents or cutter stock. If the solvent used in making the cutback asphalt is highly volatile, it will quickly escape by evaporation. Solvents of lower volatility evaporate more slowly. On the basis of the relative speed of evaporation, cutback asphalts are divided into three types: rapid curing (RC), medium curing (MC) and slow curing (SC). The rapid-setting grades are designed to react quickly primarily for spray applications, such as bond/tack coats, aggregate chips seals, sand seals, and similar surface treatments.
APPLICATION
The rapid-setting grades are designed to react quickly primarily for spray applications, such as bond/tack coats, aggregate chips seals, sand seals, and similar surface treatments. Rapid curing Cutback bitumen is typically used as prime coats and tack coats. Generally, Cutback Bitumen are divided into three groups depending on the volatility of the solvent added: Rapid curing cutback cutback bitumenAfter an RC cutback is applied the solvent evaporates away and only the Bitumen is left. A rapid curing cutback bitumen is said to cure as the petroleum solvent evaporates. Rapid Curing Cutback Bitumen is made by reducing the viscosity of ordinary bitumen by adding mostly petroleum-type solvent. Cutback Bitumen are used because their viscosity is lower than that of neat asphalt and can thus be used in low-temperature applications.
- When bitumen is applied as a primer to the surface of a road pavement aggregate base course or substrate, cutback agents are used to lower its viscosity. At different concentrations, kerosene is used as a bitumen cutback agent.
- Cutback bitumen is ideal for prime coat and cold application since it is easy to use and doesn’t require thinning or heating.
- RC cutback bitumen consists of the initial addition of asphalt to the surface of non-asphalt based course, prior to any superimposed treatment.
- A cutback asphalt RC is applied to waterproof surfaces, plug capillary voids, and coat and bond loose mineral particles.
PAVEMENT PERFORMANCE WITH RAPID CURING (RC) ASPHALT
Rapid Curing (RC) asphalt cement is a blend of high-volatility light diluents, typically within the gasoline or naphtha boiling point range (RC-30, RC-70, RC-250, RC-800, and RC-3000), and asphalt cement. It is a petrochemical mixture composed of a solvent, such as naphtha or gasoline, combined with bitumen.
The fluidity of RC asphalt primarily depends on the ratio of solvent to asphalt cement. Additionally, the hardness of the base asphalt used in the cutback formulation can influence its liquidity. This variability results in different grades of cutback asphalt, ranging from highly fluid at ambient temperatures to more viscous grades that may require slight heating for construction applications.
RC cutbacks are primarily used for prime coats and spray applications, including bond/tack coats, aggregate chip seals, sand seals, and granular priming. Their fast-acting nature makes them ideal for surface treatments in pavement construction, ensuring rapid adhesion and durability.
SPECIFIC GRADES OF RC ASPHALT SERVE DISTINCT FUNCTIONS:
- RC-800 is used for waterproofing surfaces and sealing capillary voids.
- RC-250 is commonly applied as a seal coat in roadway pavements.
CUTBACK ASPHALT UNDERGOES TWO PRIMARY TESTS:
- Residue Testing, which evaluates penetration, ductility, and solubility.
- Cutback Testing, which includes distillation, viscosity, and flash point analysis.
The degree of fluidity in RC asphalt is influenced by its solvent-to-asphalt ratio, determining its suitability for various applications. More viscous grades may require heating to achieve the necessary workability for construction operations.
RC CUTBACK BITUMEN PACKING
Usually available in:
- Bulk as IBC Tank, Flexi Tank
- Reconditioned steel drums 220 lit., Net Weight: 191 ± 3 Kg
- New steel drums 220 lit., Net Weight: 191 ± 3 Kg
TECHNICAL DATA SHEET OF RC-30
Property Min Max Test method
Kinematic viscosity at 60°c,CST 30 60 ASTM D2170
Flashpoint(tag open cup), °c _ - ASTM D3143
Penetration 77°f(25°c) 100g,5s mm 80 120 ASTM D5
Ductility 77°f(25°c) 5cm/min cm 100 - ASTM D113
Solubility in trichloroethylene % 99 - ASTM D2042
Water, percent volume _ 0.2 ASTM D95
TECHNICAL DATA SHEET OF RC-70
Property specification limit (Min) specification limit (Max) Test method
Kinematic viscosity at 60°c ,cST 70 140 ASTM D2170
Flash point(tag open cup), °c - - ASTM D3143
Distillation test
Distillate, volume percent of total Distillate to 680°f(360°c)
to 437°f(225°c)
50 - ASTM D402
To 500°f(260°c)
70 -
to 600°f(316°c)
85 -
Residue from distillation to
680°f(360°c), percent volume by difference55 -
Test on Residue from distillation test
Penetration 77°f(25°c) 100g,5s mm 80 120 ASTM D5
Ductility 77°f(25°c) 5cm/min cm 100 - ASTM D113
Solubility in trichloroethylene % 99 - ASTM D2042
Water, percent volume - 0.2 ASTM D95
TECHNICAL DATA SHEET OF RC-250
Property Min Max Test Method
Kinematic viscosity at 60°C [140°F], mm2/s 250 500 ASTM D2170
Flashpoint(Cleveland open cup), °C [°F] - 27 ASTM D3143
Distillate Test
to 437°f(225°c)
35 - ASTM D402
To 500°f(260°c)
60 - ASTM D402
to 600°f(316°c)
80 - ASTM D402
Residue from distillation to
680°f(360°c), percent volume by difference65 - ASTM D402
Asphalt Residue
Penetration 77°f(25°c) 100g,5s mm 80 120 ASTM D5
Ductility 77°f(25°c) 5cm/min cm 100 - ASTM D113
Solubility in trichloroethylene % 99 - ASTM D2042
Water, percent volume - 0.2 ASTM D95
TECHNICAL DATA SHEET OF RC-800
Property Min Max Test Method
Kinematic viscosity at 60°C [140°F], mm2/s 800 1600 ASTM D2170
Flashpoint(Cleveland open cup), °C [°F] 27 - ASTM D3143
Distillate Test
to 437°f(225°c)
15 - ASTM D402
To 500°f(260°c)
45 - ASTM D402
to 600°f(316°c)
75 - ASTM D402
Residue from distillation to
680°f(360°c), percent volume by difference75 - ASTM D402
Asphalt Residue
Penetration 77°f(25°c) 100g,5s mm 80 120 ASTM D5
Ductility 77°f(25°c) 5cm/min cm 100 - ASTM D113
Solubility in trichloroethylene % 99 - ASTM D2042
Water, percent volume - 0.2 ASTM D95
TECHNICAL DATA SHEET OF RC-3000
Property Min Max Test Method
Kinematic viscosity at 60°C [140°F], mm2/s 3000 6000 ASTM D2170
Flashpoint(Cleveland open cup), °C [°F] - 27 ASTM D3143
Distillation test
Distillate, volume percent of total Distillate to 680°F(360°F)
to 437°f(225°c)
- - ASTM D402
To 500°f(260°c)
25 - ASTM D402
to 600°f(316°c)
70 - ASTM D402
Residue from distillation to
680°f(360°c), percent volume by difference80 - ASTM D402
Test on Residue from distillation test
Penetration 77°f(25°c) 100g,5s mm 80 120 ASTM D5
Ductility 77°f(25°c) 5cm/min cm 100 - ASTM D113
Solubility in trichloroethylene % 99 - ASTM D2042
Water, percent volume - 0.2 ASTM D95
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