The Characteristics & Advantages of Powder Polycarboxylate Superplasticizer PCE

The polycarboxylate superplasticizer pce powder adopts a conventional-breaking production process, using a thermal synthesis method. This can reduce production costs in terms of energy consumption. It does not add isolating agents, resulting in higher product purity, with a solid content controlled at around 98%. In terms of product performance, high-purity products have the characteristics of low dosage, high retention of active ingredients, and good stability. This further reduces the cost for customers.

The polycarboxylate superplasticizer pce powder has excellent dispersibility and fluidity for cement at low dosages; when the dosage is greater than 0.12% to 0.22%, the consistency of the paste shows a very significant increase; the loss of paste consistency within one hour decreases as the dosage increases.

The results of the water reduction rate of mortar have a corresponding relationship with the results of the fluidity of the pure paste. That is, the greater the fluidity of the pure paste, the greater the water reduction rate of the mortar. As the polycarboxylate superplasticizer pce powder dosage increases, the water reduction rate increases rapidly, and it is relatively high. The water reduction rate of concrete with the water reducer is often inconsistent with the water reduction rate of the mortar due to the influence of the admixture materials and the properties of sand and gravel. When the properties of the admixture materials and sand and gravel are conducive to the fluidity of the concrete, the water reduction rate of the concrete is higher than that of the mortar, and vice versa.

The recommended dosage of polycarboxylate superplasticizer pce powder water reducer is: 0.1% to 0.3% of the cement usage. The powder type polycarboxylate superplasticizer pce water reducer is a powder mainly composed of polycarboxylate salts, with a solid content of about 98%. The normal dosage is 0.1% - 0.3%, and when the dosage is only 0.06%, it can achieve a 12% water reduction rate and a 23% strength increase, which is better than that of ordinary pumping agents. When the dosage is 0.1%, its performance exceeds that of common naphthalene-based and melamine-based high-efficiency water reducers. However, when the dosage of polycarboxylate superplasticizer is lower than 0.14%, the excellent performance of the workability is not obvious. When the dosage reaches 0.20% or above, the workability and pumping performance of the concrete improve to an excellent level. When configuring high-grade, large-concentration fly ash/slag micro-powder concrete and concrete with special requirements, the dosage can be increased to 0.3%.

During the daily production process, the three most commonly used cementitious materials (calcium sulfate cementitious material, Portland cement, and aluminosilicate cement) often lead to some misunderstandings when using these materials, namely the water ratio issue. Generally, the water ratio used in the final product actually far exceeds the amount of water required for the hydration of the cementitious materials. The extra water is for adjusting the fluidity (workability) of the system. Reducing water does not mean losing fluidity; instead, it may improve this aspect of performance. So, what are the benefits of Polycarboxylate Superplasticizer pce powder brought by reducing the water usage? Please read on.

Early strength, as is well known, the water in the material gradually evaporates over time under the influence of factors such as temperature and wind force until it disappears. When the amount of water used to ensure the hydration of the cementitious materials is guaranteed, the smaller the water ratio, the less water that needs to be evaporated, and the resulting material's early strength will be better. Final strength, similarly to the above part, the less water used in the material, the greater the material's density ratio, the fewer the voids, and the resulting improvement in final strength by polycarboxylate superplasticizer pce powder. 

During the continuous hydration process of the cementitious materials, the self-cohesive cementation produced by the materials will have a significant shrinkage effect, especially in the case of a large water ratio, which is more severe. In summary, a smaller water ratio provides less space for shrinkage, which is one point. Another point is that the modified polycarboxylate superplasticizer pce monomer is a high-molecular material. In the past period, it had another name, called polycarboxylate superplasticizer. After the water evaporation is completed, the question arises: what about the polycarboxylic monomer? In fact, as a high-molecular material, it has already been plasticized and filled in each possible area that may cause shrinkage, having a certain effect of reducing shrinkage. This is point two.

The principle of water reduction by modified polycarboxylic salt/polycarboxylate superplasticizer pce powder is that the polymer encapsulates the hydrated molecule, preventing the hydrated molecule from combining with water. In simpler terms, a barrier is established between the cementitious material and water, so the cementitious material will follow the flow of water and produce a pushing effect, which is commonly referred to as fluidity. That is to say, the polycarboxylic salt/polycarboxylate superplasticizer pce powder can provide good fluidity construction performance under the condition of reducing the water ratio. For materials that do not require fluidity (anti-splashing, etc.), high-viscosity cellulose and starch ethers can be used for adjustment.

Because polycarboxylic salt/polycarboxylate superplasticizer pce powder water reducer is a high-molecular material, its dosage is very low. The recommended dosage is generally 0.1% - 0.5% of the cementitious material. Therefore, with a small dosage, people may have doubts about the water dispersibility of polycarboxylic salt (the time for water mixing during construction) when using it. The solid particles of relatively mature polycarboxylic salt products should be able to dissolve quickly, dispersing rapidly through electrostatic repulsion and spatial steric hindrance effects to every corner of the product, and then quickly adsorbing. This conclusion is that it significantly shortens the mixing time during construction. After a long period of repeated verification, modified polycarboxylic salt/polycarboxylate superplasticizer pce water reducer has a very small impact on the hydration of the cementitious material compared to other water reducers. At the same time, it has unparalleled advantages in compatibility with other additives, with almost zero AEPO emissions, making it stand out in materials with higher environmental protection requirements.

The performance requirements for each finished product material are different, so the polycarboxylic/polycarboxylate superplasticizer salt finished water reducer is also divided into various models. For example, in terms of performance: it focuses on fluidity, retention, higher water reduction rate, better plasticization performance, comprehensive performance, etc. Therefore, when purchasing finished polycarboxylic/polycarboxylate superplasticizer salt water reducer, try to find professional manufacturers and distributors, and inform their professional salespeople of the performance requirements of your material, so as to quickly find a matching product and avoid unnecessary detours.