Bitumen emulsion breaking phenomenon

Spherical particles of bitumen emulsions is the evaporation of water buildup. As a result of an increase in tensile forces on the molecular electrostatic repulsion is overcome and binder particles are linked together to form a continuous mass. This phenomenon is called to break emulsification. Breaking the emulsion may be caused by contact with aggregate. Contact aggregate with the complex phenomenon of surface ionization and often mixtures of bitumen and aggregate to form insoluble particles of cement, aggregate and bitumen act, create better road use. In the cationic emulsions Each condition is independent of the type of stone aggregate bond component provides bitumen to be used. Bitumen emulsion is obtained shall not transport in tanks and not in the end be broken. However, when the emulsion is on the way broadcast advertising should immediately break and the bitumen is removed from the aqueous solution and form a thin film cover materials. The first sign of breaking the emulsion changes its color from chocolate brown to black tar that is swept away materials. At this stage, did not pitch without water and still has not achieved its full power.

The breaking of its emulsion depends on the following factors:

1. evaporation, which depends on air temperature, relative humidity, wind direction and the amount of emulsion spread, and the method used in the application of the emulsion.

2. porous surface on which emulsion spread, resulting in the removal of water through capillary tubes is the way.

3. physical and chemical properties of materials

4. The effect of mechanical rollers and traffic Amvlsyvn- system materials

rapid deposition of materials is the cell pitch. In fact, the mechanism is the breaking of the emulsion.