According to a worker who has been engaged in concrete for many years, under normal circumstances, after ordinary cement concrete slurry hardens, a large number of pores will appear in the internal structure of the slurry, and pores are the main factor affecting the strength of concrete. In actual construction, the optimal air content range of concrete should be determined during the trial mixing process according to the location of the project and the functions of the concrete, and should be effectively controlled to help ensure the construction quality of concrete. In recent years, with further research on concrete, it has been found that the bubbles introduced during concrete mixing are the main cause of pores inside the structure and on the surface after the concrete hardens. After trying to add concrete defoaming agent, it was found that the strength of the concrete increased significantly.
Function and efficacy of cement concrete defoaming agent: highly efficient at very low concentrations, stable and effective under extreme PH conditions, good stability, not easy to break demulsification, good dispersion, excellent water solubility, prevent Microbial growth, non-toxic, and will not burn. Usage: This product has strong versatility, excellent defoaming and anti-foaming effect and good long-term effect. It has good compatibility with most systems. It is used to eliminate styrene-acrylic, ethylene-propylene, pure acrylic, and vinyl acetate emulsions as the main materials. The foam produced during the production of water-based latex paint makes the paint film uniform. It will not cause defects such as "fish eyes" or "shrinkage holes" when the coating is formed, and it can also eliminate foam produced during the production and use of cement mortar, water-based ink and other products. The dosage is generally 0.1-0.3%.
Concrete is used in construction because when the concrete is rubbed, the internal bubbles are transferred to the surface of the structure through vibration or extrusion. The reason for the bubbles generated in the concrete is that polycarboxylic acid reduces the When using water-based cement, the accumulation of gaps between aggregates and air bubbles closely related to cement will cause bubbling, thus affecting the progress of the construction and increasing the cost of the construction.
Concrete defoamer is helpful in eliminating large bubbles in concrete. On the one hand, adding defoaming agent can eliminate the bubbles between the concrete and the formwork to a certain extent, effectively prevent or eliminate the generation of honeycombs and pitted surfaces on the concrete surface, and make the surface of the concrete have higher smoothness and gloss. On the other hand, defoaming agents can eliminate a large number of bubbles inside concrete, reduce the air content and internal porosity of concrete, and improve the mechanical properties and durability of concrete. Defoaming agents in concrete mainly eliminate bubbles introduced by water-reducing agents. Therefore, defoaming agents are often compounded with polycarboxylic acid-based water-reducing agents in projects to solve the problem of large air entrainment of polycarboxylic acid-based water-reducing agents. .
Which cement concrete defoaming agent to choose depends on your specific system requirements. The above is a brief introduction to the functions and efficacy of cement concrete defoaming agents. I hope it can be helpful to everyone
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