Gorman brother asphalt emulsion mill1/9/2024 ![]() ![]() All three types are surfactants and in their own way, give stability to the bitumen emulsion by not allowing the asphalt to separate from the water in the solution.įor instance, by mixing an anionic bitumen emulsifying agent with water and asphalt, the anionic surfactant will give a negative charge to all the bitumen particles. In the case of non-ionic, there is no charge. In the case of anionic emulsifying agents, the electrochemical charge is negative, while for cationic emulsifiers, the charge is positive. 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. a combination of both above-mentioned options. ![]()
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