Defoamer for concrete can effectively reduce or eliminate bubbles generated during concrete mixing and pouring by destroying the surface tension of foam and making bubbles break rapidly and disperse into the liquid. Its working principle involves the action of surfactants, which can quickly penetrate to the interface of bubbles, reduce surface energy, and promote bubble coalescence and rupture.

Concrete defoamers are mainly divided into organic silicon type, polyether type, mineral oil type, and composite type. Organic silicone defoamers are widely used due to their high efficiency and long-lasting defoaming ability; Polyether type is suitable for applications that require high compatibility of the system; Mineral oil types have lower costs, but may have certain environmental impacts; The composite type combines the advantages of multiple components to cope with complex working conditions.

The use of defoamers significantly improves the compactness and strength of concrete, reduces the increase in porosity caused by the presence of bubbles, and thus improves the durability, impermeability, and freeze-thaw resistance of concrete. At the same time, surface defects such as pockmarks and honeycombs have been reduced, improving the aesthetics and overall quality of concrete.

The research and development of defoamers for substitute concrete are increasingly focusing on environmental protection and safety, using low VOC (volatile organic compound) formulas to reduce environmental pollution. At the same time, ensure that the product is non-toxic or low toxic, and safeguard the health of construction personnel.