Performance characteristics of polycarboxylate superplasticizer


Release time:

2020-06-19

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Performance characteristics of polycarboxylate superplasticizer
 
Polycarboxylate water reducing agent is a kind of concrete plasticizer (water reducing agent) with high technology content, good application prospect and excellent comprehensive performance. Polycarboxylate superplasticizer is a compound product of carboxylic acid graft copolymer and other effective additives. The comparison with the performance of similar products at home and abroad shows that the polycarboxylate superplasticizer has reached the advanced level in terms of technical performance indicators and cost performance.
Polycarboxylate superplasticizer performance characteristics:
 
1, low dosage, high water reduction rate, water reduction rate can reach 45%;
 
2. The loss is small when the slump is light, and the slump loss rate of ready-mixed concrete is less than 5% for 1h and less than 10% for 2h;
 
3, the enhancement effect is remarkable, the concrete 3d compressive strength increased by 50~110, 28d compressive strength increased by 40 ~ 80%,90d compressive strength increased by 30 ~ 60%;
 
4. The concrete has excellent workability, no segregation and bleeding, and the appearance color of the concrete is uniform. When used to prepare high-grade concrete, the concrete has good cohesion and is easy to mix;
 
5, moderate air content, no adverse effect on the elastic modulus of concrete, good frost resistance durability;
 
6, can reduce the early hydration heat of cement, is conducive to mass concrete and summer construction;
 
7. Excellent adaptability, good compatibility of cement and admixture, good temperature adaptability, good compatibility with different varieties of cement and admixture, and solve the problem of poor compatibility between other types of water reducing agents and cementitious materials;
 
8, low shrinkage, can significantly reduce the shrinkage of concrete, freeze-thaw resistance and anti-carbonation ability is obviously superior to ordinary concrete; significantly improve the volume stability and long-term durability of concrete;
 
9, alkali content is extremely low, alkali content ≤ 0.2%, can effectively prevent the occurrence of alkali aggregate reaction
 
10, the product stability is good, long-term storage without stratification, precipitation phenomenon, no crystallization precipitation 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 project comprehensive cost is lower than the use of other types of products, the same strength conditions can save 15-25% of cement.

Key words:

Polycarboxylate superplasticizer