What Are The Classifications of Concrete Water Reducer

Water reducer may be a concrete admixture which will scale back the number of blending water beneath the condition that the slump of the concrete is largely unchanged. so as to enhance and regulate the operate of concrete or mortar, organic, inorganic or composite compounds are typically else throughout mixing. once adding the concrete mixture, it's a dispersing impact on the cement particles, which may improve its workability, reduce the unit water consumption, and improve the liquidness of the concrete mixture. Or reduce the unit cement consumption and save cement. The foremost normally used water reducers are lignosulfonates and their derivatives, higher polyols and polyol complexes, hydroxycarboxylic acids and their salts, polyvinyl ethers and their derivatives, and so on.

Superplasticizers chiefly include, naphthalene salt methanal condensate, polycyclic hydrocarbon sulfonate formaldehyde polycondensate, sulfamate, base sulfonate formaldehyde polycondensate, etc.

Superior water-reducing agents are presently mainly polycarboxylic acid-based water-reducing agents.

Lignosulfonate. It's a standard water reducing agent. Its staple is lignin, that is mostly extracted from cone-bearing trees. polymer is polymerized from 3 lignin monomers: p-genol, coniferyl alcohol and sinapyl alcohol. it's used for mortar. It can improve workability, liquidness associate degreed strength, and also the water reduction rate is 5%-10%.

Sodium salt of naphthalene sulfonate water reducer. It's a high-efficiency water reducer that we tend to used earlier. It's the merchandise of sulfonation of naphthalene by vitriol and condensation with formaldehyde. It's an anionic surfactant. the looks of this kind of water-reducing agent may be lightweight yellow to dark brown powder counting on the product, simply soluble in water, and contains a sensible dispersing impact on several powder materials similar to cement, with a water reduction rate of 25%.

Base water reducing agent. It's the product of sulfonation of base by vitriol and condensation with methanal, that the chemical name is sulfonated melamine formaldehyde resin, that belongs to anionic surfactants. the looks of this kind of water reducer is white powder, which is definitely soluble in water, has sensible dispersion to powder materials, has high water reduction rate, and has good liquidness and self-repairing properties.

Powder polycarboxylate. it's a replacement style of superior water-reducing agent developed in recent years. it's glorious water-reducing rate, fluidity and permeability. It clearly enhances the strength of cement mortar, however the assembly method is difficult and the value is mostly higher.

Casein. it's a biopolymer obtained by precipitation of milk with acid and cylinder drying.

Polycarboxylic acid-based superior water reducer. Polycarboxylic acid-based high-performance water-reducing admixture may be a quite concrete superplasticizer with advanced technology content, sensible application prospect and glorious comprehensive performance within the world.

At present, the polycarboxylate superplasticizer is wide used, that is a compound product of process graft polymer and alternative effective additives. The performance comparison with other similar product shows that the polycarboxylate series high-performance water reducer has reached the advanced level of today’s society in terms of technical performance indicators and price performance. Polycarboxylate superplasticizers are chiefly accustomed formulate low-water-cement ratio, high-strength, self-compacting and high-durability concrete. it's the most development direction of concrete high performance water reducer.