Bubbles are an issue that cannot be ignored in the production and application of concrete. These bubbles will reduce the compactness, durability, and strength of concrete, thereby affecting its overall performance. In order to solve this problem, defoamers for concrete have emerged.

Defoamer is a chemical agent used to reduce or eliminate foam in liquid. In concrete, commonly used defoamers include organophosphates, proteins, and surfactants. These defoamers are usually supplied in liquid form and should be added during the mixing process of concrete. By adding defoamers to concrete, the number of bubbles in the concrete can be effectively reduced, and the compactness and durability of the concrete can be improved.

In practical applications, the amount of defoamer is usually determined based on the specific concrete formula and application requirements. In general, the dosage of concrete defoamer is 0.05% to 0.2% of the total mass of concrete. It should be noted that the amount of defoamer should not be excessive, otherwise it may affect the strength and other physical properties of the concrete. Therefore, before use, it is recommended to refer to the instructions and technical data provided by the defoamer supplier and strictly follow their recommended dosage.

In addition, choosing the appropriate defoamer is also crucial. Different defoamers have different properties and uses, and need to be selected according to specific circumstances. For example, organic phosphorus defoamers have excellent defoaming performance and good thermal stability, and are widely used in industries such as concrete, cement products, and cement mortar; Protein based defoamers are mainly made from animal and plant proteins or protein hydrolysates, and have good defoaming and enhancing effects.

In summary, defoamers for concrete play an important role in the production and application of concrete. By selecting appropriate defoamers and reasonable dosages, the compactness and durability of concrete can be effectively improved, thereby ensuring the overall performance of concrete.