In the construction industry, the problem of foam often puzzles constructors and engineers. No matter in the process of concrete mixing, coating construction or other building materials preparation, foam may have adverse effects on production efficiency and product quality. Therefore, as an important industrial additive, the application of defoamers in the construction industry is particularly important.

Foam is formed by the dispersion of gas in liquid. Its existence may lead to lower production efficiency, material waste, longer reaction period and lower product quality. Especially in the process of concrete preparation, foam will reduce the strength and stability of concrete and affect the overall quality of the building. Therefore, selecting and using appropriate defoamers has become the key to solving this problem.

Defoamers play a role mainly by destroying and inhibiting the formation of foam liquid film. Its surface tension is low and it is easy to spread on the surface of the solution. After entering the bubble liquid film, it can replace the surface active molecules on the original liquid film surface, thereby reducing the strength of the liquid film, gradually thinning it and eventually breaking. In the construction industry, commonly used defoamers include organosilicon defoamers, polyether defoamers, etc. These defoamers have the characteristics of fast defoaming speed, long defoaming time, and wide applicability.

In addition, with the increasing awareness of environmental protection, the construction industry has put forward higher requirements for the environmental performance of defoamers. Traditional defoamers may contain harmful ingredients to human health and the environment, therefore, the development of environmentally friendly, efficient, and safe defoamers has become a trend in the industry. At present, there are some environmentally friendly defoamers based on new materials such as bio based materials and nanomaterials on the market. These defoamers not only have excellent defoaming performance, but also reduce environmental pollution.

In the construction industry, the correct use of defoamers can not only improve production efficiency and product quality, but also reduce production costs and environmental impact. Therefore, construction personnel and engineers should fully understand the performance and usage methods of defoamers, and choose suitable defoamers according to actual situations to ensure the smooth progress of construction projects and steady improvement of building quality.