Cationic Bitumen Emulsion CRS-1 is a widely used emulsion in the construction industry. This emulsion is used for various applications such as surface dressing, penetration macadam, and cold-mix asphalt. In this page, we will provide a comprehensive overview of Cationic Bitumen Emulsion CRS1. We will discuss its product description, history, types and grades, chemical properties, production methods, advantages, safety tips, and applications.

The Bitumen Emulsion CRS-1 is a fast-acting, cationic asphalt emulsion that interacts promptly with aggregate material, transitioning from an emulsion state to that of asphalt. Asphalt emulsions are categorized based on the electric charge surrounding their asphalt particles, either being cationic or anionic, as well as their “breaking” speed—how quickly the asphalt particles separate from the water.

A rapid-setting emulsion, such as CRS-1, destabilizes swiftly upon aggregate contact. The rate of this setting process is dependent on the atmospheric conditions during construction. CRS-1 comprises 60% bitumen, exhibits a black hue, and is strictly produced in accordance with the ASTM D 2397M-13 standard.

Cationic Bitumen Emulsion CRS-1 is a cationic emulsion of a bituminous binder dispersed in water. It is a dark brown liquid with a viscosity ranging from 50 to 300 cSt. It is a stable emulsion with a pH value of 2.5 to 5.5. This emulsion is produced by emulsifying bitumen with water and an emulsifying agent. The resulting emulsion can be used for a wide range of applications in the construction industry.

What is the Cationic Bitumen Emulsion CRS-1?

Cationic Bitumen Emulsion CRS-1 is a type of bitumen emulsion used in road construction. It is a cationic emulsion, which means that the bitumen droplets are positively charged. This makes it more effective for applications that involve mixing with aggregates, as the positively charged droplets attract negatively charged aggregates.

Cationic Bitumen Emulsion CRS-1 History

Bitumen emulsions have been used in road construction since the early 20th century. The first emulsions were produced by mixing bitumen with water and a surfactant. However, these emulsions were not very stable and tended to break down over time. In the 1960s, cationic emulsions were developed, which improved the stability and performance of bitumen emulsions. Cationic Bitumen Emulsion CRS-1 is a product of this development.

Cationic Bitumen Emulsion CRS-1 Other Names

Cationic Bitumen Emulsion CRS-1 is also known as Cationic Rapid Setting Bitumen Emulsion, CRS1 Emulsion, Bitumen CRS 1 Emulsion, and Cationic Bitumen Emulsion RS-1.

Cationic Bitumen Emulsion CRS-1 Grades, Types, and Forms

Cationic Bitumen Emulsion CRS-1 is available in different grades and types depending on its intended application. The main grades of CRS-1 emulsion are CRS-1h, CRS-1m, and CRS-1l. The ‘h’, ‘m’, and ‘l’ refer to high, medium, and low viscosity, respectively. The high viscosity grade is used for surface dressing, the medium viscosity grade is used for penetration macadam, and the low viscosity grade is used for cold-mix asphalt.

Different Applications between Various Cationic Bitumen Emulsion CRS-1 Grades, Types, and Forms

The different grades of Cationic Bitumen Emulsion CRS-1 have different applications. The high viscosity grade (CRS-1h) is used for surface dressing, which involves spraying a thin layer of emulsion onto the road surface and then spreading a layer of chippings over it. The medium viscosity grade (CRS-1m) is used for penetration macadam, which involves mixing the emulsion with coarse aggregates to form a dense, durable road surface. The low viscosity grade (CRS-1l) is used for cold-mix asphalt, which involves mixing the emulsion with fine aggregates and filler to produce a low-cost pavement material.

Cationic Bitumen Emulsion CRS-1 Production Different Types

Cationic Bitumen Emulsion CRS-1 is produced by emulsifying bitumen with water and an emulsifying agent. The emulsifying agent is usually a quaternary ammonium salt, which has a positively charged head and a long hydrophobic tail. The emulsifying agent helps to stabilize the bitumen droplets in water by forming a protective layer around them.

There are two main methods of producing bitumen emulsions: the batch method and the continuous method. In the batch method, a fixed amount of bitumen, water, and emulsifying agent is mixed together in a tank, and the emulsion is agitated until it is stable. The continuous method involves continuously feeding bitumen, water, and emulsifying agent into a high-speed mixer, where they are mixed and emulsified. The continuous method is more efficient and is typically used for large-scale production.

Cationic Bitumen Emulsion CRS-1 Specifications

PropertyProperty MinMaxTest Method
Test on Emulsions
Viscosity, Saybolt Furol at 25 °C, SFS20100ASTM D244
Storage stability test, 24-h, %1ASTM D6930
Demulsibility, 35 mL, 0.8 % dioctyl sodium sulfosuccinate, %40ASTM D6936
Coating ability and water resistance:
Particle charge testPositiveASTM D244
Sieve test, %0.1ASTM D6933
Distillation : 
Oil distillate, by volume of emulsion, %3ASTM D6997
Residue, %60ASTM D244
Tests on residue from distillation test:
Penetration, 25°C (77°F), 100 g, 5 s100250ASTM D5
Ductility, 25°C (77°F), 5 cm/min, cm40ASTM D113
Solubility in trichloroethylene, %97.5ASTM D2042

Cationic Bitumen Emulsion CRS-1 Chemical Formula, CAS Number, and HS Code

The chemical formula for Cationic Bitumen Emulsion CRS-1 varies depending on the specific bitumen and emulsifying agent used. However, in general, it can be represented as:

Bitumen + Water + Emulsifying Agent → Cationic Bitumen Emulsion CRS-1

The CAS number for bitumen is 8052-42-4, and the CAS number for the most commonly used emulsifying agent, a quaternary ammonium salt, is 61789-80-8. The HS code for Cationic Bitumen Emulsion CRS1 is 2715.00, which falls under the category of Mineral Fuels, Mineral Oils and Products of their Distillation; Bituminous Substances; Mineral Waxes.

Cationic Bitumen Emulsion CRS-1 Properties

Cationic Bitumen Emulsion CRS-1 has several properties that make it suitable for various applications in the construction industry. Some of the key properties of CRS-1 emulsion include:

Good adhesion: CRS-1 emulsion has good adhesion to various substrates, including asphalt, concrete, and soil.

Good flexibility: CRS-1 emulsion maintains its flexibility even at low temperatures, making it suitable for use in cold climates.

Water resistance: CRS-1 emulsion is water-resistant, which helps to prevent water from penetrating the road surface and causing damage.

Rapid setting: CRS1 emulsion has a rapid setting time, which allows for quick construction and minimizes disruption to traffic.

Cationic Bitumen Emulsion CRS-1 Advantages

Cationic Bitumen Emulsion CRS-1 has several advantages over traditional bitumen products. Some of the key advantages include:

Low energy consumption: The production of CRS-1 emulsion requires less energy than the production of traditional bitumen products.

Environmentally friendly: CRS-1 emulsion is a water-based product and does not release harmful fumes or odors during production or use.

Versatile: CRS1 emulsion can be used for a wide range of applications, including surface dressing, penetration macadam, and cold-mix asphalt.

Cost-effective: CRS 1 emulsion is a cost-effective alternative to traditional bitumen products, especially for low-traffic roads and pavements.

Cationic Bitumen Emulsion CRS-1 Safety Tips

Cationic Bitumen Emulsion CRS-1 is a safe product to use when handled and applied properly. However, it is important to follow certain safety tips to avoid any potential risks or hazards. Here are some important safety tips to keep in mind:

Personal protective equipment (PPE): Always wear appropriate PPE, including gloves, eye protection, and a respirator, when handling CRS-1 emulsion.

Ventilation: Ensure adequate ventilation in the work area to avoid inhaling any fumes or vapors.

Spills and leaks: In the event of a spill or leak, contain the spill immediately using an absorbent material such as sand or sawdust. Do not attempt to wash away the emulsion with water.

Storage: Store CRS-1 emulsion in a cool, dry place away from heat, sparks, and flames.

Disposal: Dispose of any unused CRS-1 emulsion in accordance with local regulations.

Factors Affecting Cationic Bitumen Emulsion CRS-1 Price

The price of Cationic Bitumen Emulsion CRS-1 can varies depending on several factors, including:

Raw material costs: The cost of bitumen and emulsifying agents can fluctuate depending on market conditions, which can impact the final product price.

Production costs: The cost of producing CRS-1 emulsion can vary depending on the production method, energy costs, and labor costs.

Supply and demand: The price of CRS-1 emulsion can also be influenced by supply and demand factors, with high demand leading to higher prices.

Transport costs: The cost of transporting CRS-1 emulsion from the production site to the end-user can also affect the final product price, especially if long-distance transportation is required.

Quality of the product: The quality of CRS1 emulsion can also impacts the final price, with higher quality products often commanding a higher price.

Cationic Bitumen Emulsion CRS-1 Applications

Cationic Bitumen Emulsion CRS-1 has a wide range of applications in various industries, including:

Road construction and maintenance: CRS-1 emulsion is commonly used for road construction and maintenance, including for applications such as pavement sealing, crack filling, and pothole repair.

Roofing: CRS-1 emulsion can also be used in roofing applications, such as for waterproofing and repairing asphalt roofs.

Waterproofing: The product can also be used as a waterproofing agent for various applications, such as in underground structures, basements, and tunnels.

Industrial coatings: CRS-1 emulsion can be used as a binder for industrial coatings, such as for pipe coatings, tank linings, and protective coatings for steel structures.

Emulsified asphalt production: CRS 1 emulsion is also used in the production of emulsified asphalt, which is used for various road construction and maintenance applications.

Packaging of the Cationic Bitumen Emulsion CRS-1

Cationic Bitumen Emulsion CRS-1 is typically packaged in drums, totes, or bulk containers, depending on the quantity required. The product is usually transported in bulk containers, such as tanker trucks or railcars, and then packaged into smaller containers at the destination.

Drums are typically used for smaller quantities of the product, such as for residential or small commercial projects, while totes are used for larger quantities. Bulk containers are used for larger projects or for industrial applications that require a continuous supply of the product.

Cationic Bitumen Emulsion CRS-1 Transportation and Storage

Cationic Bitumen Emulsion CRS-1 should be transported and stored in accordance with local regulations and industry best practices. The product should be stored in a cool, dry place away from heat, sparks, and flames, and should be kept in the original container until ready for use.

During transportation, the product should be properly labeled and secured to prevent spills or leaks. Tanker trucks or railcars used to transport CRS1 emulsion should be properly cleaned and inspected before use to avoid any contamination or mixing with other products.

Leave a Reply

Your email address will not be published. Required fields are marked *

Inquiry Form

What You Can Expect:

  • Quick Response: We will reply to your inquiry within 24 hours.
  • Expert Assistance: Our knowledgeable team will provide thorough support throughout the process.
  • Follow-up Email: We will send a summary of any additional questions or proposed actions via email.

We value your interest and are committed to providing professional and efficient service.


To obtain detailed information or product samples, please complete the form below. We are dedicated to meeting our customers’ needs and will promptly provide the requested information or samples.