The selection and use of defoamers for concrete are crucial for improving its performance. Firstly, when selecting defoamers, their defoaming performance should be considered, and defoamers with excellent defoaming performance should be chosen to ensure effective reduction of the number of bubbles in concrete. Next is the thermal stability of defoamers, which should have good thermal stability to adapt to the application of concrete in high temperature environments. At the same time, defoamers should be compatible with other components in concrete to avoid chemical reactions that may cause a decrease in concrete performance. Common defoamers for concrete include organic phosphorus, protein, and surfactants. Each defoamer has its own unique properties and uses, which need to be selected according to specific circumstances.

Defoamers are usually supplied in liquid form and should be added during the mixing process of concrete. First, remove some of the water from the concrete, then add the defoamer to the water for thorough mixing, and then add the mixed defoamer solution to the remaining concrete for further mixing. The dosage of defoamer should be determined according to the specific concrete formula and application requirements. It is recommended to refer to the instructions and technical data provided by the defoamer supplier and strictly follow their recommended dosage for use. After adding defoamers, it should be ensured that the concrete is thoroughly mixed to ensure that the defoamers are evenly dispersed throughout the entire concrete.

During use, it is important to avoid excessive use. The amount of defoamer should not be excessive, as it may affect the strength and other physical properties of the concrete. During the storage and transportation of defoamers, attention should be paid to avoiding high temperatures, direct sunlight, and other conditions to avoid affecting the quality of the defoamers. In addition, when using defoamers, attention should be paid to protecting the skin and eyes to avoid chemical burns. At the same time, ventilation should be strengthened to avoid inhaling harmful gases that can harm health.