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What are the classifications of emulsified asphalt equipment? How does it work?
December 3rd, 2021
1. classification of emulsified asphalt equipment
Emulsified asphalt equipment can be divided into mobile, movable and fixed types according to its configuration, layout and mobility.
Mobile emulsified asphalt equipment is to fix emulsifier mixing device, emulsifier, asphalt pump and control system on a supporting chassis; Portable emulsified asphalt equipment is to install each main assembly in one or more standard containers and load and transport them respectively to realize site transfer. It depends on the installation and combination of hoisting machines and tools to form a working state. The production capacity of such equipment has different configurations of large, medium and small; Fixed emulsified asphalt equipment generally relies on places with asphalt storage tanks such as asphalt plant or asphalt concrete mixing plant, and has a relatively fixed customer group within the service distance.
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2. Basic production principle of emulsified asphalt equipment
Emulsified asphalt equipment in the asphalt water system, the emulsifier molecules move between the asphalt and water interface, the water sparing groups of the molecules are adsorbed on the surface of the asphalt and make it charged, while the hydrophilic groups enter the aqueous phase. Thus, the asphalt particles are connected with water, and the interfacial tension between them is reduced.
At the same time, the asphalt particles repel each other due to the same charge, which prevents them from coalesce. Therefore, the asphalt emulsion can maintain uniformity and stability in a certain period. The nature of charge depends on the hydrophobicity of the emulsifier or the charge of the hydrocarbon chain. If it is a negative charge, the asphalt particle has a negative charge, and the emulsion formed is anionic asphalt emulsion. On the contrary, it is cationic asphalt emulsion. If the asphalt particles have negative charge and positive charge, the emulsion is zwitterionic asphalt emulsion. In addition, there are non-ionic asphalt liquids.
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