PCE refer to polycarboxylate superplasticlizer .It is a high performance water reducing agent and a cement dispersant in the application of cement concrete.
It is widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects.It is the world’s most cutting-edge, high-tech content, best application prospects, and a high-efficiency water reducing agent with the best overall performance.
The product is environmentally friendly, non-flammable, non-explosive, and can be safely transported by trains and cars.
Polycarboxylic acid water reducer is mainly made by the copolymerization of unsaturated monomers under the action of initiator.
The unsaturated monomers currently used mainly include: unsaturated acids and their anhydrides such as maleic acid, maleic anhydride and (methyl )
Polymerizable carboxylic acids such as acrylic acid; polyolefins and their derivatives with different functional groups, such as ethers, alcohols, sulfonates, etc.; polystyrene sulfonates and (meth)acrylates, esters, etc.
As a dispersant, the relative molecular weight of the polymer has a very important influence on its dispersibility.
If the relative molecular mass is too small, the ability of the polymer to maintain slump is not high; when the relative molecular mass is too large, not only is it easy to cause agglomeration,
which causes the cement paste to become more viscous, but also shields the main chain from water reduction Functional groups such as carboxyl groups, sulfonic acid groups, etc., which can cause the dispersion of cement paste to decrease.
Through experiments, it is believed that the water reduction rate of the polymer first increases with the increase of the relative molecular weight, and then decreases after reaching a certain value.