Asphalt emulsion manufacturers association11/20/2023 There are 3 types of charges: anionic, cationic and non-ionic. These surfactants are classified by their electrochemical charge. It is a representation of one bitumen droplet surrounded by an emulsifying agent and suspended in water.įurthermore, emulsifiers are also known as chemical surface-active agents. Above is a simplified asphalt emulsion model. The result is a bitumen particle repelling others and remaining suspended in the water solution. Consequently, the ionic charge of the emulsifying agent surrounds the asphalt droplets. They have an electrically charged head soluble in water and a hydrocarbon tail soluble in the liquid bitumen. Another interchangeable term for emulsifier is surfactant. The emulsifier is a chemical surface-active agent and formed of large molecules. What is an Emulsifying Agent and What Purpose does an Emulsifier have in an Asphalt Emulsion? These are common examples of emulsions we use every day. If imagining a bitumen emulsion is hard, think of paint and shampoo. Consequently, after the asphalt emulsion breaks and cures, the bitumen residue has the same durability, adhesion, and water-resistance properties of the original base asphalt. It all depends on how the emulsion will be used and what is the desired breaking speed.
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