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What is The Use of Superplasticizer in Concrete?

What is superplasticizer?

If you need to know What is the use of superplasticizer in concrete, the first you need to know what is superplasticizer? Polycarboxylate superplasticizer is a high-performance water-reducing agent and a cement dispersant in the application of cement concrete. Widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects.

For the synthesis of polycarboxylate superplasticizers, the design of molecular structure is crucial, including the main chain groups in the molecule, the density of side chains and the length of side chains. The synthesis methods mainly include in-situ polymerization grafting method, first polymerization and then functionalization method and monomer direct copolymerization method.

How to use high-efficiency polycarboxylate water reducer.

Dosage range: Under normal circumstances, when converted to 20% solid content, the dosage is 0.5 to 1.5% of the weight of the cementitious material, and the recommended dosage is 1.0%.

use of superplasticizer in concrete

What is the use of superplasticizer in concrete

Performance characteristics

  1. Low dosage, high water reduction rate, water reduction rate can be as high as 45%;
  2. The slump loss over time is small, the slump loss rate of ready-mixed concrete is less than 5% in 1h and less than 10% in 2h;

  3. The reinforcement effect is remarkable, the 3d compressive strength of concrete is increased by 50-110%, the 28d compressive strength is increased by 40-80%, and the 90d compressive strength is increased by 30-60%;

  4. The concrete has excellent workability, no segregation and bleeding, and the appearance and color of the concrete are uniform. When used to prepare high-grade concrete, the concrete has good cohesion and is easy to mix;

  5. The air content is moderate, it has no adverse effect on the elastic modulus of concrete, and the frost resistance durability is good;

  6. It can reduce the early hydration heat of cement, which is beneficial to mass concrete and summer construction;

  7. It can reduce the early hydration heat of cement, which is beneficial to mass concrete and summer construction;

  8. Low shrinkage, which can significantly reduce the shrinkage of concrete, and its freeze-thaw resistance and carbonation resistance are significantly better than those of ordinary concrete; it can significantly improve the volume stability and long-term durability of concrete;

  9.  The alkali content is extremely low, the alkali content is less than or equal to 0.2%, which can effectively prevent the occurrence of alkali-aggregate reaction

  10. The product has good stability, no stratification or precipitation occurs in long-term storage, and no crystal precipitation occurs at low temperature;

  11. The product is green and environmentally friendly, does not contain formaldehyde, and is an environment-friendly product;

  12. Good economic benefits, the comprehensive construction cost of the project is lower than that of other types of products, and 15-25% of cement can be saved under the same strength conditions.

Good economic benefits, the comprehensive construction cost of the project is lower than that of other types of products, and 15-25% of cement can be saved under the same strength conditions.