What foaming conditions can cement defoamers be used for?

Generally, there are three types of cement used in construction: general-purpose cement, special-purpose cement, and characteristic cement. Each type of cement has its own use and performance, so that the right cement can be selected according to different building requirements.

Although these types of cement are different, foam problems will be encountered in the production process, and the production process of Portland cement has a certain representation in cement production, it is made of limestone and clay as the main raw materials, through crushing, batching, grinding into raw meal, and then fed into the cement kiln calcined mature material, and then the clinker is added to the appropriate amount of gypsum or mixed with mixed materials, admixtures, etc

1) The gradation is unreasonable, there are too many coarse aggregates, and too little fine aggregates;

2) Improper size of aggregate and excessive content of needle-like particles;

3) Concrete with large water consumption and high water-cement ratio;

4) It is related to some external admixtures and the chemical composition of cement itself;

Jingqi cement defoamer is a defoamer synthesized by polyether modified silicone and other ingredients through professional R&D technology. It is easy to disperse in water, and has good compatibility with internal additives; The quality of the concrete hole structure can be improved, and the air content can be effectively controlled.

The mud mortar defoamer can be added directly to the foaming system and must be stirred well before use. 1%, recommended dosage: 0, the final dosage is based on actual experiments. Due to the different foaming media of various systems, there are various reasons for foaming.

According to the composition of the paint defoamer, we can divide it into 7 types:

1. Natural oils and fats.

2. Polyethers.

3. High-carbon alcohols.

4. Silicones.

5. Polyether modified silicon.

6. New self-emulsifying type.

7. Polysiloxanes.

First of all, it is necessary to confirm what kind of system the paint is. Water-based coatings are suitable for special water-based defoamers, while solvent-based coatings can use oil-based defoamers or water-oil general-purpose defoamers. It is necessary to choose the one that is suitable for the system as much as possible, so that there can be good compatibility and will not lead to other problems.

In addition, defoamers are divided into three types: defoamers, antifoam agents and deaerators. The foam breaker is mainly to eliminate large bubbles; Foam inhibitors can inhibit the generation of bubbles for a long time; Deaerators are mainly aimed at microbubbles and vesicles. The corresponding type of defoamer can be selected according to the actual situation, which can achieve twice the result with half the effort.