Concrete defoamer is a kind of chemical additive widely used in the production and construction process of concrete, which is specifically designed to reduce or eliminate the bubbles in concrete. During the mixing and construction of concrete, due to operations such as mixing and vibration, air may be introduced, forming bubbles. These bubbles can affect the fluidity and filling property of concrete, thus influencing the construction effect. The defoamer can effectively reduce the bubbles in concrete, improve the compactness of concrete. By reducing bubbles, it can enhance the compressive and flexural strength of concrete, help to obtain a smoother surface, and reduce defects such as honeycombs and pitted surfaces. It can also reduce the permeability of concrete and improve its frost resistance and corrosion resistance.
Concrete defoamer is usually composed of multiple components, including silicone, polyether, grease, etc. These components are mixed in a certain proportion to form a complex with defoaming effect.
Generally, before adding the concrete defoamer to the concrete, it is first blended with a part of the mixing water, and then added to the mixing water of the concrete, stirred evenly, and finally added to the concrete. The dosage is determined according to factors such as the strength of the concrete, construction conditions, and the performance of the defoamer. Generally, the addition amount is 0.05% to 0.3% of the weight of the concrete.
Concrete defoamer has good stability and can function under various humidity and temperature conditions. This makes it more convenient during storage and transportation, without having to worry about the impact of environmental changes on the defoaming effect. In conclusion, the use of concrete defoamer can not only effectively reduce the bubbles in concrete, improve the compactness and durability of concrete, but also bring convenience in use. It is an indispensable additive in concrete construction.
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