In the process of concrete production, the use of water reducers can improve the performance of concrete and improve its workability and strength. However, water reducers often produce foam during use, which not only affects the appearance quality of concrete, but also may reduce its performance. Therefore, the application of defoamers for water reducers is particularly important.
Application scenarios of defoamers for water reducers
Water reducers contain a large amount of surfactants, which have the characteristics of easy foaming. In the production process, unreasonable stirring or inappropriate pH value may lead to the generation of foam. Foam will increase the porosity of concrete and reduce the strength and durability of concrete. In addition, foam will also affect the workability of concrete, reduce the slump of concrete, and affect the construction quality.
The working principle of defoamers for water reducers is mainly based on the following two aspects:
Bubble breaking effect: defoamers can reduce the surface tension of foam, make the foam liquid film thinner, and cause the foam to break. Defoamer molecules usually have low surface tension and can quickly penetrate into the liquid film surface of the foam, destroying the stability of the foam.
Anti-foaming effect: Defoamers can not only eliminate existing foam, but also control the generation of new foam. Defoamer molecules can be adsorbed on the gas-liquid interface to form a stable protective film to prevent further escape of gas, thereby achieving the effect of anti-foaming.
In summary, defoamers for water reducers play a vital role in concrete production. By selecting suitable defoamers and using them correctly, the foam in the water reducer can be effectively eliminated, the performance of concrete can be improved, the construction quality can be guaranteed, and strong support can be provided for the development of the concrete industry.
