NEWS

At present, naphthalene and polycarboxylic acid superplasticizers are widely used in the market, but they will release formaldehyde in the process of use, so the synthetic raw materials are limited and can not be biodegraded.

Carboxymethyl beta cyclodextrin attracts many concrete researchers. In the cement paste system, the mutual dispersion of particles mainly depends on the mutual repulsion or steric hindrance effect between particles. However, carboxymethyl can be adsorbed on the surface of cement particles, providing more adsorption sites for carboxymethyl beta cyclodextrin, so that the surface of cement particles is negatively charged, carboxymethyl With the increase of the degree of substitution, the content of carboxyl group in the structure increases, the effective adsorption point of the product is increased, and the electrostatic repulsion force between cement particles is gradually increased, and the dispersion ability is enhanced. Carboxymethyl beta cyclodextrin has excellent dispersing ability for cement particles. The fluidity of cement paste can reach 270mm, the water reducing rate can reach 23.5% (the dosage is 0.8%), and there is no bleeding and segregation. Its application in the concrete industry has broad prospects.