SuperPlasticizers (Super-Plasticizers)For concrete production
SuperPlasticizers (Super-Plasticizers), water reducers, and the reduction of HBV or high range water are chemical additives that are added to concrete mixes to improve workability. If the mixture is “hungry” water, the concrete strength is inversely proportional to the amount of added water or water-cement (w / c). To produce a stronger concrete is less water (without “starving” of the mixture), which the concrete mix mix less practical and hard-to require the use of plasticizers, water reducers, plasticizers, or dispersants.
Plasticizers are also often used when pozzolanic ash is added to concrete to improve strength. This method of mix proportioning is especially popular in the production of high-strength concrete and fiber concrete.
Add 1-2% plasticizer by weight of cement is usually sufficient. Adding an excessive amount of plasticizer lead to high separation of concrete and is not desirable. After the chemical to cause the use of plasticizers a retarding effect.
Plasticizers are generally made from lignin, a by-product of paper industry. Superplasticizer were usually made of sulfonated naphthalene condensate, sulfonated melamine-formaldehyde, although new products are based on poly-ether now available. Traditional plasticizers lignosulfonate, naphthalene and melamine sulfonate-based superplasticizers (Super-Plasticizers)disperse flocculated cement particles through a mechanism of electrostatic repulsion (see colloid). Plasticizer in normal, active ingredients are adsorbed on cement, which makes them a negative charge, causing repulsion between the particles. Lignin, naphthalene and melamine sulfonate plasticizers are organic polymers. The long molecules wrap around the cement particles, making them a highly negative charge so they repel each other.
Polycarboxylate ether solvent (PCE) or simply polycarboxylate (PC) to function differently sulfonate based superplasticizer (Super-Plasticizers), which cement dispersion by steric stabilization instead of electrostatic repulsion. This form of dispersion is stronger in its effect and gives improved workability in mixing cement.
In ancient times the Romans used animal fats, milk and blood to improve the workability of concrete mixtures.
SuperPlasticizer (Super-Plasticizer)Best For Concrete Production
SuperPlasticizers (Super-Plasticizers) Best For concrete production (Concrete Tiles,interlocking block and Tiles)