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.
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 difference | 55 | - | |
| 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 difference | 65 | - | 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 difference | 75 | - | 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 difference | 80 | - | 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 |
