? ?? Asphalt emulsifier is an emulsified asphalt can indicate an active agent solution. In asphalt emulsifier, need only a small amount of solvent such that the water surface tension will be significantly reduced, and the interface can significantly change the nature and state, so that it produces and other cleaning, wetting and dispersing a series of effect, and may reach the actual application requirements. Asphalt emulsifier http://www.hnsdyhg.com/ in the selection, with the following requirements:?? 1, depending on the nature of the screening of asphalt emulsifier: Every one emulsifier have some scope. When the label or asphalt composition changes, we must re-screening of the species and the amount of emulsifier, or may cause serious deterioration of the performance of emulsified asphalt. ?? 2, have the right HLB value: HLB value of the asphalt is generally 16 to 18, the choice of emulsifier HLB value should be close to this range. If the number of groups asphalt emulsifier hydrophilic group is too large, the number of lipophilic groups is too small, then the emulsifiers and lipophilic and hydrophilic property poor, otherwise poor lipophilicity strong and hydrophilic, these two types of emulsifier not make the asphalt particles in the water to achieve a good dispersion state. ?? 3, there must be a suitable carbon chain lengths: a carbon chain length emulsifiers actually reflects the stronger affinity to bitumen affinity size, the longer the carbon chain and asphalt, with worse affinity for water, thus the carbon chain length selection should be moderate for a carbon chain length of emulsified asphalt emulsifier typically C12-Cis. ?? 4, asphalt emulsifier emulsifier should try to use: Use a single emulsified asphalt emulsifier, the prone flocculation or settlement, it should try to use two or more emulsifiers compound used to achieve different emulsifiers complementary strengths and weaknesses.