Description of Bitumen Emulsion CSS-1h
Bitumen Emulsion CSS-1h is a slow-setting cationic asphalt emulsion that is designed for various paving and industrial uses.
Asphalt emulsions are classified according to the electric charge that surrounds the emulsion’s asphalt particles (i.e. whether it is a cationic or an anionic emulsion) and how quickly the suspended asphalt particles separate from the surrounding water (“breaking”). A slow-setting emulsion is designed to maximize the mixing time with aggregates. Bitumen emulsions CSS-1h is a cationic emulsion. Bitumen emulsions CSS-1h are usually made by passing the mixture of hot bitumen and water phase between a rotating disc, cone, or wheel and a stator. In the emulsification process, the hot binder is mechanically separated into minute globules and dispersed in water treated with a small quantity of the emulsifying agent. The water is called the continuous phase and the globules of the binder are called the discontinuous phase. by proper selection of an emulsifying agent and other manufacturing controls.
Application of Emulsion CSS-1h
While general guidelines can be given for selecting emulsions, laboratory testing is strongly recommended. There is no substitute for a laboratory evaluation of the emulsion and the aggregate to be used. Different types and quantities of emulsion should be tried with the aggregate to find the best combination for the intended use. An experienced technician can determine the type and grade of the emulsion to be used.
- Environmental considerations.
- Proper application for pavement preservation or pavement distresses.
- Traffic type and volume.
Advantages of Bitumen CSS-1h
- Wide variety of emulsion types available today
- Economical
- Free from danger ( for fire )
- Environmental
- Harmless for worker health.
Difference between Cationic Bitumen Emulsion CSS-1 and CSS-1h
The principal difference between Cationic Bitumen Emulsion CSS-1 and CSS-1h lies in the state of climatic and application fitness. CSS-1 is a standard cationic bitumen emulsion for cold application, such as surface dressing and road maintenance, and is used under average climate conditions. It has excellent adhesion to aggregates and does not need to be heated to apply. Conversely, CSS-1h (where the “H” stands for “High”) is a type of CSS-1 that is particularly made to be applied in warm climatic conditions or on substrates that require faster curing. CSS-1h has a higher viscosity that will counteract faster evaporation, thus it is more suitable for use in hot climates. While both emulsions are used in the same application fields, the largest divergence is in their performance in severe weather conditions, with CSS-1h handling warmer climates better.
Packing
Packing of bitumen emulsion CSS-1h is in a new thick steel drum on a pallet to prevent any leak inside of container also bulk in bitutainer and tanker.
Specification
| Property Property | Min | Max | Test Method |
|---|---|---|---|
| Test on Emulsions | |||
| Viscosity, Saybolt Furol at 25 °C, SFS | 20 | 100 | ASTM D244 |
| Storage stability test, 24-h, % | – | 1 | ASTM D6930 |
| Particle charge test | positive | positive | ASTM D244 |
| Sieve test, % | – | 0.1 | ASTM D6933 |
| Cement mixing test, % | – | 2.0 | ASTM D6935 |
| Distillation: | |||
| Residue, % | 57 | – | ASTM D244 |
| Tests on residue from distillation test: | |||
| Penetration, 25°C (77°F), 100 g, 5 s | 40 | 90 | ASTM D5 |
| Ductility, 25°C (77°F), 5 cm/min, cm | 40 | – | ASTM D113 |
| Solubility in trichloroethylene, % | 97.5 | – | ASTM D2042 |
FAQs
1. In what ways is CSS-1h different from the rest of the emulsions like RS, MS, or SS type?
CSS-1h is a slow-setting cationic bitumen emulsion with higher viscosity than CSS-1. It is designed for applications where there is a need for longer working times and better cohesion, e.g., cold mixes and surface treatments needing more time to cure.
2. Does CSS-1h require heating prior to application?
No, CSS-1h is cold-applied emulsion and does not require heating, thus safer and environmentally friendly.
3. How long will the CSS-1h emulsion last?
CSS-1h has a normal shelf life of 4 to 6 months when stored in sealed containers away from the sun and extreme heat. Stir before application.
4. Can CSS-1h be applied in rainy or wet conditions?
Yes, CSS-1h maintains its integrity in wet and damp conditions due to its cationic nature, but application during heavy rain should be avoided for proper curing.
5. Can I use CSS-1h for tack coat or surface dressing?
CSS-1h has main application in cold mixes and slow-setting applications. It is not that commonly utilized for tack coat or surface dressing, where fast-setting emulsions are employed.
