What are Concrete Plasticizers
The concrete plasticizer is commonly known as a water reducer in concrete. Plasticizers refer to the chemical additive which can enhance the slump highly and maintain it for a long time. At the same time, it can reduce the water consumption of mixing additives. In China, plasticizers in concrete mainly refer to high range water reducer and high-performance water reducer with a high water reduction rate. The invention and application of plasticizers for concrete is the third revolution of concrete technology after reinforced concrete and prestressed concrete.
Plasticizer for concrete is an important construction material in the 21st century, which can significantly improve the performance of fresh and hardened concrete. The development of concrete becoming more and more deeply, for this reason, plasticizer in concrete becomes necessary. It is an integrant of concrete that can influence the properties of concrete greatly. Concrete plasticizers have a surface-active effect. So adding plasticizer admixture to the concrete can reduce water, save cement and improve plasticizing performance.
Differences between Concrete Plasticizer and Superplasticizer
Another name of concrete plasticizer is a normal water reducing agent. The plasticizer in concrete can achieve a water reduction rate of 15%. Another name of concrete superplasticizer is high range water reducing agent. The water-reducing rate of superplasticizer can reach 30%. Superplasticizer is a type of concrete plasticizers, but it has more performance. Here are some products of concrete plasticizer and superplasticizer in Kingsun.
1. Sodium Lignosulphonate
Sodium lignosulphonate is a concrete plasticizer. After adding the sodium lignin sulfonate into the concrete, the hydrophobic group of the plasticizer is adsorbed on the surface of the cement particles, and the hydrophilic group is directed to the aqueous solution to form a single or multi-molecular adsorption film, so that the cement particles have the same surface, charges are mutually exclusive and dispersed, and the excess water is released from the particles to achieve the purpose of water reduction. At the same time, since the surface tension of the water and the interfacial tension between the cement particles lower, the water consumption is reduced correspondingly while maintaining the same fluidity, thereby also reducing the water. Sodium lignosulphonate can greatly reduce the hydration of the concrete, reduce the porosity, and increase the compactness of the concrete, thereby greatly improving the strength and impermeability of the concrete.
2. Sodium Naphthalene Sulfonate Formaldehyde
Sodium naphthalene sulfonate formaldehyde is the most widely used concrete superplasticizer in China. It has the characteristics of a high water reduction rate, no bleed air, good cement adaptability, etc. Its synthetic process is relatively mature, the price is cheap. In addition, naphthalene sulfonate has good compounding performance with various admixtures. You can use it to formulate high-strength and high-performance concrete.
3. Polycarboxylate Superplasticizer
Polycarboxylic acid is a new type of high-performance superplasticizer. It has characteristics like low dosage, high water reduction rate, remarkable enhancement effect, low slump loss over time, and little effect on setting time. The use of a polycarboxylate ether superplasticizer has the following advantages.
1. The dosage is low and the water reduction rate is high. The dosage is usually 0.05-0.5% of the cement material, and the water reduction rate is up to 30%.
2. The degree of freedom of molecular structure change is large. Many carboxylic acid polymers can be used as high-performance superplasticizers, and the variety of raw materials is diverse.
3. It has good compatibility with cement, additives and other admixtures. The concrete does not segregate or secrete water. Besides, it has a good slump retention performance.
4. Widely used. The performance of superplasticizer can be designed according to different requirements. It can effectively control the early hydration of cement in concrete. It is suitable for the preparation of large volume concrete and it can prepare high strength, ultra high strength special concrete.
5. Polycarboxylate superplasticizer provides a technical guarantee for the large-scale use of industrial waste such as large-volume fly ash and slag steel slag in concrete engineering. The synthesis of superplasticizers does not use formaldehyde, which is conducive to the sustainable development of construction materials.
What is the Purpose of Plasticizer in Concrete
The water-reducing effect of plasticizer in concrete is one of its most important properties. The effect of water reduction is mainly caused by adsorption dispersion, lubrication, and wetting. Lubrication is by the plasticizer that produces a layer of solvated water film on the surface of the cement particles and fine bubbles to prevent direct contact of the cement particles. Wetting can make the particles of cement disperse as much as possible, increase the hydration area of cement, and accelerate the hydration speed. Moreover, the wetting action can also improve the workability of the concrete, and reduce the amount of water for mixing while also achieving uniform mixing.
Superplasticizer molecules adsorb on the surface of cement particles, forming an interface film with a certain mechanical strength, preventing the condensation of particles. Due to the dispersion and water-reducing effect of the plasticizer, it can lower the water-cement ratio, and uniformly disperse the cement particles, and then prevent them from agglomerating into a group, enhance the compactness of concrete, thereby increasing the strength of concrete.
During the hydration process of cement, the surface free energy of cement particles is large and agglomeration occurs. At the same time, the hydration product produced by hydration will increase the viscosity of the fresh concrete and cause the slump loss of the concrete. After adding high range plasticizer admixture, the surface of the cement particles adsorbs highly efficient plasticized molecules, and the electric potential of the cement particles increase, which increases the dispersion of the cement, inhibits the slump loss and improves the plasticizing performance.
KINGSUN – Concrete Plasticizer Manufacturer & Supplier
The use of plasticizers has a great impact on the performance of concrete. Therefore, choosing the right plasticizer is beneficial to the construction. Henan Kingsun Chemical Co., Ltd. is one of the leading concrete plasticizer manufacturers and suppliers in China. It has been producing and developing quality concrete additives for many years. KINGSUN is deeply trusted by consumers because of its high-quality products and professional services. The concrete plasticizer products from KINGSUN has exported to many countries and regions, such as India, South Korea, Vietnam, Indonesia, Pakistan, Brazil, South Africa, Chile, Australia, Russia, Ukraine, etc. If you want to know the plasticizer price or other product information, please leave us a message or send an e-mail.