CAS 62601-60-9 Polycarboxylate Water Reducer / Polycarboxylic Acid Superplasticizer

Polycarboxylate Superplasticizer powder is used as a water reducer for concrete

In recent years, with the continuous increase of the infrastructure construction, industrial and civil building scale in our country, internally continue to increase infrastructure construction, and actively participating in foreign key projects and the output of high speed iron technology, can not be avoided from the improvement of high performance concrete technology, and the development of high performance concrete technology puts forward higher and more diverse requirements to the concrete admixture.

Polycarboxylic acid water reduction due to its unique structural characteristics, with high water reduction rate, low content, excellent slump protection performance, green environmental protection and molecular structure designability and other advantages, has been widely used in high-speed rail, subway, Bridges, DAMS and other large infrastructure projects, is currently domestic and foreign water reducing agent market leading products. It is the core product to promote the continuous development of high performance concrete technology and construction technology.

However, a large number of engineering practices have proved that due to the continuous reduction of high-quality sand and stone resources, as well as the high temperature conditions and long distance transportation process, the slump of concrete often appears to lose too fast, so that the working performance of concrete is reduced, it can not be poured normally, and even the phenomenon of adding water at the construction site, which seriously affects the mechanical properties and durability of concrete.  At present, in practical application, the concrete slump loss is usually inhibited by compounding retardants such as sodium gluconate, white sugar and citric acid. However, the addition of these retardants cannot completely solve the problem of too fast slump loss of concrete. Moreover, if the addition of retardants is not well controlled, May lead to concrete segregation, delayed bleeding, setting time is too long, early strength is low new problems.

Due to the designability of its molecular structure, polycarboxylic acid superplasticizer can be prepared with different functional types of polycarboxylic acid superplasticizer products through the combination of different structural units and functional energy groups. Using isoenol polyoxyethylene, acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate and methyl allyl tartrate mono as raw materials, aqueous solution free radical polymerization, and by adjusting the polymerization temperature, the amount of chain transfer agent, the use of hydroxyethyl acrylate and hydroxypropyl acrylate and methyl allyl tartrate mono  and other factors, A high slump - preserving polycarboxylic acid water reducer was synthesized.

Product characteristics:

1.  High water reduction rate: it has excellent water reduction rate and plastic retention, and still has excellent water reduction performance under low content. The effect is particularly significant in cement-based mortar, gypsum based mortar and high grade concrete, and the highest water reduction rate can reach 40%; High water reduction rate: in low content has a very high water reduction efficiency, giving the material system excellent liquidity, effectively improve the system of compactness and strength, the highest water reduction rate can reach 40%.

2.  High dispersion: With excellent dispersion ability, it can quickly adsorb, reduce mixing time, give the material system excellent workability and constructability, improve construction efficiency and meet different construction requirements.

3.  High adaptability: with a variety of cement-based systems have excellent adaptability, and good compatibility with other functional admixtures, under a variety of conditions do not reduce the application performance.

4.  Early strength and high strength: it has excellent early strength and enhancement effect. The enhancement effect is remarkable under the same conditions, and the dosage can also be reduced under the same demand.

5.  High durability: enhance the compactness of hardened slurry, improve shrinkage and creep performance, reduce cracks, enhance permeability, erosion and chloride penetration resistance, improve durability.

6.  Green environmental protection: does not contain harmful substances, safe environmental protection, belongs to environmental friendly materials.

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