CRS1 emulsion bitumen
CRS1 emulsion bitumen is a cationic early breaking emulsion. CRS1 bitumen emulsion is usually made by passing a mixture of hot bitumen and water phase between a rotating disc, cone or wheel and a stator.
Unstable quick-breaking emulsion bitumen on the surface of the material breaks very quickly and leaves a very thin layer of bitumen.
Application of CRS1 emulsion bitumen
Their main use is in sealing with stone materials, sealing with sand, surface asphalts and penetrating macadam.
In order not to flow on the surface of the road, quick-breaking emulsion bitumen has a high mental retardation.
What is the difference between MC retarder bitumen and emulsion?
Different types of bitumen have differences and each has its own properties. The two types of bitumen widely used are emulsion bitumen and solvent bitumen. The most important difference between emulsion bitumen and MC is in their type of solvent. The solvent of the emulsion is water and the solvent of retarding bitumen is kerosene.
Retardant bitumen Emulsion bitumen
Less stickiness more stickiness
High explosion risk no explosion risk or very low explosion risk
High resistance to freezing low resistance to freezing
Classification of emulsion bitumen based on electric charge
This classification is determined based on the type of electric charge of bitumen constituent particles. Particles are either positively charged or negatively charged, and some particles are uncharged and neutral. The important point is that cationic and anionic each have three different types.
Cationic
If the bitumen constituent particles in the emulsion have a positive electric charge, they are called cationic bitumen and are indicated by the letter C. This bitumen has three types of quick breaking, slow breaking and slow breaking.
Anionic
If the bitumen constituent particles in the emulsion have a negative electrical charge, they are called anionic bitumen and are indicated by the letter A. This bitumen has three types of quick breaking, slow breaking and slow breaking.
Non-Ionic
If the bitumen forming particles in the emulsion have no electric charge and are neutral, they are called non-ionic bitumen. These particles have no positive or negative charge.
Classification of emulsion bitumen based on breaking speed
The compound in emulsion bitumen is destroyed after use and water is separated from the bitumen. The water in the composition evaporates over time and pure bitumen remains, which is called the emulsion breaking process.
Emulsions are divided into three categories based on the duration of their stability: fast breaking, slow breaking and slow breaking. Each of these three groups has several different subcategories.
Quick breaking bitumen
Evaporation of water in this group does not last long and occurs quickly. For this reason, quick breaking bitumen emulsion is also called unstable emulsion. This bitumen has a low viscosity and only a thin layer of bitumen remains on the surface. CRS emulsion bitumen is an example of cationic bitumen.
Retardant bitumen
These emulsions are semi-stable and retain their composition for a longer time than the quick-dissolving type. Their viscosity is higher than the quick-breaking type, and the water in them evaporates more slowly; As a result, they leave a thicker layer of bitumen on the surface.
Slow setting bitumen
Slow-set emulsion bitumen are very stable and the water in them evaporates very slowly. This bitumen are more viscous than the first two types, which can be reduced by adding water. Of course, this viscosity can be increased by adding cement or lime.
