what is Anionic Bitumen Emulsion RS-2?
Anionic Bitumen Emulsion RS-2 is a specialized emulsion with unique properties suitable for various applications. It is classified based on breaking characteristics, with rapid-setting emulsions for surface dressing and medium or slow-setting emulsions for blending with aggregates.
Rapid-setting emulsions are not suitable for mixing with aggregates due to their quick solidification and potential obstruction. The choice of emulsion grade depends on aggregate size, with medium-setting emulsions suitable for stone mixtures and slow-breaking emulsions for sand mixtures. Anionic emulsions are sensitive to temperature and humidity, affecting their breaking properties.
They are characterized by their negative charge, which is a common attribute in many substances. The industrial coatings industry has researched anionic systems due to their prevalence. However, this property is not suitable for coating applications due to its inability to effectively apply to substrates.
Application of Anionic Bitumen Emulsion RS-2
This Product is a rapid-setting designed for waterproofing concrete and metal surfaces in construction applications. RS-2 is an easy-to-use and safe product thanks to its high flash point and low solvent content. RS-2 can be applied with a paint brush, squeegee, airless spray, or even a roller.
Bitumen emulsions are commonly used for highway building, surface, and maintenance. They are also employed in other applications that require water-repellent surfaces.
Rapid setting emulsions are a type of emulsion that is stable enough to mix with fine or dusty aggregate mineral particles and undergo additional processing before settling to a cohesive mass. Such grades of bitumen emulsions (RS-2), when anionic, react chemically with Portland cement constituents forming a water insoluble salt and thus possess valuable water resistant characteristics.
Different Between Anionic Bitumen Emulsion RS-1 and RS-2
Anionic Bitumen Emulsion RS-1 and RS-2 differ primarily in their setting time, viscosity, and applications. RS-1, with its rapid setting properties and lower viscosity, is designed for quick applications like tack coats, ensuring rapid bonding between asphalt layers. Its thinner consistency allows easy spray application and fast penetration into fine materials. On the other hand, RS-2 has a slightly slower setting time and a higher viscosity, making it ideal for surface treatments like chip sealing, where it ensures effective binding of coarser aggregates to the pavement surface. While both emulsions are water-based and environmentally friendly, RS-1 is optimized for tasks requiring speed and precision, whereas RS-2 is better suited for durable surface treatments in road construction.
Packaging & Storage
Anionic Bitumen Emulsion RS-2 comes in a variety of packaging options, including bulk tanks, steel drums, and HDPE drums. Proper storage techniques are vital for maintaining its integrity and performance.
Store RS-2 in vertical bulk tanks between 10°C and 85°C to avoid freezing or boiling, which can change its composition.
To preserve consistency, regularly mix stored RS-2, especially in colder climates, with suitable low-shear pumps.
Avoid excessive agitation to prevent foam production and emulsion disintegration.
Specification
| PROPETRY | MIN | MAX | TEST METHOD |
|---|---|---|---|
| Viscosity SFS , 25 °C (s) | 20 | 100 | ASTM D244 |
| Storage stability, 24h (%) | — | 1 | ASTM D6930 |
| Particle charge test | Minus | Minus | ASTM D244 |
| Demulcibility , 35ml, 8% dioctyl sodium sulfosuccinate, % | 60 | — | ASTM D6936 |
| Sieve (%) | — | 0.1 | ASTM D6933 |
| Residue by distillation (%) | 63 | — | ASTM D244 |
| Residue penetration, 25 °C | 100 | 200 | ASTM D5 |
| Solubility in trichloroethylene % | 97.5 | — | ASTM D2042 |
| Residue ductility, 25 °C, 5cm/min (cm) | 40 | — | ASTM D113 |
FAQs – Anionic Bitumen Emulsion RS-2
1. How is RS-2 different from other emulsions?
RS-2 is an anionic bitumen emulsion with quick setting and slightly longer breaking time than RS-1, hence ideal for surface treatments where rapid curing is critical but with a little more working time.
2. Does RS-2 need to be heated during application?
No, RS-2 is a cold-applied emulsion that does not need to be heated, enhancing safety and minimizing energy use on-site.
3. Is RS-2 suitable to be used with any type of aggregate?
RS-2 works best with alkaline aggregates such as limestone. For acidic or siliceous aggregates, compatibility tests are to be conducted.
4. Favourable condition in which RS-2 should be stored.
RS-2 should be stored in closed, tightly sealed containers in a dry cool environment away from direct sunlight and freezing temperatures to maintain quality.
5. For how long can RS-2 be stored?
Maintained properly RS-2 is stable at room temperature for a maximum time of 6 months. Shaking or stirring before use is advisable to achieve uniformity.
6. Is RS-2 eco-friendly?
Yes, RS-2 is a waterborne system that does not involve solvents or heat, thus it is safer for handling and more environmentally friendly than traditional bitumen products.
