After the cement adding surface active agent, surfactant in solution can be dissociation of hydrophilic group and hydrophobic groups, hydrophilic group in slurry system, pointing to the solution of hydrophobic groups are adsorbed on the surface of cement particles, the surface of cement particles with the same charge and produce electricity repulsion between cement particles, the electric repulsion is greater than the molecular attraction between particles, cement particles flocculation structure formed by the tear, package of water release structure, thus increasing the liquidity of the mixture.At the same time, the function of using the like charges repel each other, pushes away the cement particles increases the distance between the cement particles, thus increasing the cement particle dispersion, have the effect of the change of liquidity, is advantageous to the cement particles and water contact, expanding reaction of cement and water environment, to punctuate step of hydration, hydration heat release more.The release and utilization of internal hydration heat can reduce the absorption of external supply heat, and polycarboxylic acid water reducer can make the cement more fully utilized in the activity.
So much for the introduction of polycarboxylic acid superplasticizer. If you have any questions, you can read the preparation principles of polycarboxylic acid superplasticizer.
