Emulsified asphalt is composed of two immiscible material - a mixture of bitumen and water. The emulsion particle size is a more important parameter since the particle size becomes single, dispersion, emulsion viscosity will be better, and bond breaking performance is more suitable. However, this also limits the bitumen content of the emulsion, which affect the speed of curing, in general, when the particle diameter was found by VSS has the best overall characteristics in a range of 1 ~ 5μm.
Composition and chemical properties of bitumen are complex. With high polarity (polarizing) and higher aromatic asphalt, generally easier to emulsify. Additives can be used to improve emulsification, in general, a high penetration bitumen emulsion easier than the low penetration of asphalt.
Emulsified asphalt chemical dispensing choice depends on road conditions, both the anionic emulsifiers and cationic emulsifiers are dependent on the salt of a long chain hydrocarbons, which may be a synthetic oil fatty acids found in organisms turn, more fatty acid or a mixture of wood pulp lignin.
Emulsions are generally used to control the content through the device and formulation. Using a suitable emulsifier, an emulsion formulation emulsifier correct control effect,is very important for the production of the emulsion.
