Is the accident caused by the water leakage and bottom grabbing of the concrete with polycarboxylate

For water secretion, please adjust the amount of admixture. The water reduction rate of the admixture is large, and the concrete is easy to saturate, so there is excess water outside.

Concrete admixtures are chemical substances that are mixed in the process of mixing concrete, accounting for less than 5% of the cement mass, and can significantly improve the performance of concrete. With the continuous progress of science and technology, admixtures have been more and more used, and admixtures have become the fifth important component of concrete in addition to the four basic components.

Concrete admixtures are mainly naphthalene high-efficiency superplasticizers, polycarboxylate high-performance superplasticizers and aliphatic high-efficiency superplasticizers.

Naphthalene-based superplasticizer: Naphthalene-based superplasticizer is a non-air-entraining superplasticizer synthesized by chemical industry. The chemical name is naphthalene sulfonate formaldehyde condensate, which has a strong dispersion effect on cement particles.

For the preparation of large-flow concrete, there are early strength, high strength requirements of cast-in-situ concrete and components, has a good use effect, can comprehensively improve and improve the performance of concrete, widely used in highways, bridges, dams, ports and wharves, tunnels, electric power, water conservancy and civil engineering, steaming and natural conservation components.

If only the polycarboxylic acid admixture is added, you can try to reduce the admixture content first, and then analyze.

This can't be said to be the reason for admixtures, it should be said that it is the reason why the mix ratio is not done well.

The dosage of admixtures can be appropriately reduced. It can basically be determined that it is the cause of admixtures.

Polycarboxypure permeable acid superplasticizer is a commonly used additive in concrete, which can reduce the amount of cement and improve the fluidity of concrete. However, if the polycarboxylate superplasticizer is used too much or is not compatible with other additives, it may become viscous in concrete.

The main reason is that the polycarboxylate superplasticizer molecule contains a large number of carboxynavol groups, which can adsorb the surface of cement particles to form a negatively charged surfactant layer, so that the electrostatic repulsion between cement particles is reduced, thereby increasing the fluidity of concrete. However, if too much polycarboxylate superplasticizer is used, these carboxyl groups will attract each other to form a tighter adsorption layer, resulting in an increased viscosity of the concrete.

In addition, if the polycarboxylate superplasticizer is not compatible with other additives, viscosity may also occur. For example, if both a retarder and a polycarboxylate superplasticizer are added to the concrete, viscosity may occur because the retarder inhibits the hardening reaction of the cement, making the polycarboxylate superplasticizer unable to exert its normal water-reducing effect.

Therefore, when using polycarboxylate superplasticizer, the appropriate dosage should be selected and mixed with other additives should be avoided to avoid the problem of concrete viscosity.

Polycarboxylate superplasticizer solves the technical problem of self-compacting concrete that is difficult to pour in ordinary concrete.

The recommended dosage range is %, and for the use of some special cement or aggregates, the dosage range can be appropriately adjusted; For specific cement and mix ratio, it should also be determined by application test. When used, it can be mixed into metered water or added to a concrete mixer at the same time. Concrete mixing test should be carried out before use to ensure the quality of concrete; In use, it can be used in combination with various retarders, defoamers, air-entraining agents and water reducing agents such as wood sodium; It is recommended that users determine the method and conditions of use of the product through their own testing and compounding techniques before use.

Polyphosphate superplasticizer is a concrete that has an enhanced, quick-drying and moisture reduction.

Different requirements have different proportions.

Each component meets the quality requirements of national standards.

What questions do you want to ask?

Polycarboxylate superplasticizer mainly solves the problem of fluidity loss of commercial concrete when it is transported to the construction site after the preparation of the mixing plant, and reduces the water consumption during the preparation of concrete, so as to improve the strength of concrete.

At present, there is still the problem of adaptability with cement, which is very compatible with some cement, and the effect of water reduction and collapse preservation is very good, but the application effect of some cement is very poor.

The main problem is that the slump loss is too large.

The solution is more complicated, and it is related to the adaptability of each cement, the dosage of water reducer, water content and many other aspects. I don't know what problem the landlord is trying to solve.