What are some common concrete defoaming agents?
Release Time:
2016-08-24
Source:
What are some common concrete defoaming agents?
Common concrete defoamers are mainly classified into silicone-based defoamers, polyether-based defoamers, and polyether-modified silicones. Silicone-based defoamers are characterized by low surface tension, high surface activity, strong defoaming performance, low dosage requirements, and low cost. They can effectively defoam most air-containing systems; however, their compatibility is poor when used as concrete defoamers. Polyether-based defoamers exhibit excellent defoaming and foam-suppressing properties and good compatibility when applied in concrete, but their defoaming efficiency is slightly lower than that of silicone-based defoamers. Polyether-modified silicones combine the advantages of both silicone-based and polyether-based defoamers, offering strong defoaming performance, good compatibility, and the need for low addition levels; nevertheless, their price is higher than that of the other two categories.
The use of defoamers reduces scrap and defective products, thereby improving and enhancing the quality of the final product. Let’s now explore the four key characteristics of defoamer application.
1. Foam elimination: The product can rapidly eliminate foam after use, thereby reducing the environmental impact of harmful substances. It delivers quick defoaming performance during the defoaming process and, after application, also exerts a certain suppressive effect on foam formation, thus enhancing overall performance.
2. Ease of use: It is extremely simple to use—simply place it in water, and it is ready for operation. Moreover, it is widely employed in nonionic surfactants, significantly enhancing the efficiency of industrial production.
3. Operating Environment: During operation, the product can be used in a wide range of environments without being rendered inoperable due to environmental factors; it is suitable for use in high-temperature and high-pressure conditions, among others.
4. Safe Storage: Even when not in use, the product can be stored for extended periods without sustaining damage, thereby enhancing its effectiveness in removing surface foam from items.
