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The application of surfactant in the construction industry is mainly to make use of its ability to change the interfacial tension. A small amount of addition can significantly reduce the interfacial tension and change the interface state of the system, resulting in wetting or anti-wetting, emulsification or demulsification, dispersion or agglutination, foaming or defoaming and solubilization.

Surfactant in construction is mainly used in the following aspects : firstly, as a concrete admixture applied in concrete, used to change the performance of concrete, to meet some special performance requirements of the construction industry for concrete ; secondly ,in the release agent and the application of concrete curing; thirdly, in building coating application ; finally, in asphalt emulsification as an emulsifier application instrument.

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