Polycarboxylate Superplasticizer

Polycarboxylate ether (PCE) superplasticizers have a variety of uses such as improving concrete liquidity and pumping, reducing water-ash ratio, improving crack resistance, improving early intensity and saving cement dosage. The use of polycarboxylate ether in concrete construction can improve construction efficiency, improve the performance of concrete, and reduce construction costs. It has important economic and technical significance.

• Compatibility with Various Cement Types. The poly carboxylic ether superplasticizers are compatible with a wide range of cement types, including ordinary Portland cement, blended cement, and even specialty cements. This versatility makes them suitable for various construction applications and projects.
• Improve the liquidity and pumping of concrete. PCE based superplasticizer can form decentralized gelgen particles in the concrete, so that the liquidity of concrete can be significantly improved. By adding an appropriate amount of water reducing agent, the concrete can become more flowing and plastic, thereby improving the efficiency of construction. In addition, PCE superplasticizer can also improve the pumpingability of concrete, making it less likely to occur and layered during the pumping process of concrete.
• Reduce concrete water and gray ratio. Polycarboxylate ether superplasticizer can form a decentralized adsorption film in the concrete, reducing the contact between water and cement particles, thereby reducing the concrete water and gray ratio. By reducing the water and gray ratio, the strength and durability of the concrete can be improved. In addition, reducing the water -grade ratio can also reduce the contraction and cracking of concrete, and improve the anti -penetration performance of concrete.
• Improve the early intensity of concrete. They can promote the hydration response of cement particles and accelerate the early intensity development of concrete. By adding an appropriate amount of water reducing agent, the concrete can obtain higher intensity in the early days, shorten the maintenance time, and improve the construction efficiency. In addition, water reduction agents can also improve the frost resistance and durability of concrete.
• Save cement dosage. Polycarboxylate water reducer can significantly reduce the amount of cement dosage of concrete and save costs. By adding an appropriate amount of water reducing agent, you can reduce the amount of cement without reducing the strength of the concrete to achieve the purpose of saving costs. In addition, reducing cement dosage can also reduce environmental pollution.
• Improve the crack resistance of concrete. The polycarboxylate based superplasticizer can improve the crack resistance of concrete. After adding an appropriate amount of water reducing agent in concrete, the internal structure of the concrete can be improved and the contraction and cracking of concrete can be reduced. In addition, water reduction agents can also improve the ductility and toughness of concrete and increase the crack resistance of concrete.

1. Low dosage and high water reduction rate. The water reduction rate of polycarboxylate based superplasticizer can be as high as 45%, which can be used to prepare high-strength and high-performance concrete.
2. Small loss when slump is light. The slump loss of premixed concrete in 2h is less than 15%, which is very beneficial for long-distance transportation and pumping construction of commercial concrete.
3. Good working performance. Even under high slump conditions, concrete prepared with PCE water reducer will not have obvious segregation and bleeding, and the appearance and color of the concrete are uniform. It is especially beneficial for preparing high-flow concrete, self-leveling concrete, self-compacting concrete, and plain water facing concrete. When used to prepare high-grade concrete, the concrete has good workability and cohesion, and the concrete is easy to mix.
4. Good compatibility. The polycarboxylate ether has good compatibility with different types of cement and admixtures, which solves the compatibility problem of other types of water reducers with cementitious materials.
5. Small concrete shrinkage. Polycarboxylic acid superplasticizer can significantly reduce concrete shrinkage and significantly improve concrete volume stability and durability.
6. Extremely low alkali content. Alkali content ≤0.2%.
7. Good economic benefits. The overall cost of the project is lower than that of other types of products.
8. Green and environmentally friendly. This product is non-toxic and harmless, and is a green and environmentally friendly product that is conducive to sustainable development.

The use of PCE superplasticizer requires comprehensive consideration of factors such as the method of addition, adaptability, construction environment, and safety. During use, we should strictly follow the requirements determined by the product manual or test to ensure the quality of concrete and the construction effect. The following are detailed precautions for use

1. Addition method and proportion

• Addition method. The most common method of using polycarboxylate based superplasticizer is to add it together with the mixing water, usually later than the initial part of the mixing water. The specific addition method needs to be determined by test to compare the plasticizing effect of different addition methods in cement paste, mortar or concrete mixture.
• Dosage control. The dosage of PCE based superplasticizer needs to be strictly controlled to avoid concrete performance problems caused by excessive use. The dosage of PCE water reducer of different brands and models may be different, so it should be used strictly in accordance with the dosage determined by the product manual or test.

2. Adaptability and compatibility

• Cement adaptability. The adaptability of polycarboxylate ether superplasticizer to cement may vary depending on factors such as cement type and grade. Before use, an adaptability test should be conducted to determine the compatibility of the water reducer with cement.
• Compound materials. When necessary, PCE water reducer may need to be compounded with other admixtures such as air entraining agent and defoamer to adjust the performance of concrete. When compounding, attention should be paid to the compatibility and mutual influence between the admixtures.

3. Construction environment and conditions

• Temperature control. During the production and use of PCE superplasticizer, attention should be paid to temperature control to avoid the influence of high or low temperature environment on the performance of water reducer.
• Storage conditions. The PCE polycarboxylate superplasticizer should be stored in a cool, dry and well-ventilated place, avoiding direct sunlight and rain. At the same time, it should be kept away from fire and heat sources to prevent fire or explosion accidents.

4. Other precautions

• Water seepage problem. When using PCE polycarboxylate ether, attention should be paid to observing the water seepage of concrete. If water seepage problem occurs, timely measures should be taken to adjust it, such as adding viscosity enhancer.
• Appearance quality. For concrete projects with high requirements for surface quality, attention should be paid to controlling the dosage of PCE superplasticizer and the use of compound materials to avoid appearance quality problems such as yellow-brown spots.