Concrete Superplasticizer

beton superplasticizer is an important admixture used in the production of high-performance concrete. It helps to improve the workability and strength of high-performance concrete in conjunction with silica fume, lavenona manidina, tain-drendrika, or other additions.

Superplasticizers (SP) are soluble macromolecules, hundreds of times larger than water molecules. They adsorb to the C3A in cement particles and release entrapped water.

In a concrete mix, these superplasticizers are added at a low dosage with a maximum of 2 per cent of the total water. The mixture is then mixed at a minimum of 3 minutes with a mechanical drill or 5 minutes with a mortar mixer.

The addition of superplasticizers reduces the amount of water in concrete mixes without reducing the strength or workability of the mix. This can save a lot of money on construction materials as well as time.

It also helps to prevent segregation in aggregate-based mixes.

A common problem with using superplasticizers is that they tend to lose their workability quickly. This may cause difficulties when placing concrete as ready-mixed delivery trucks must be able to make long trips between job sites.

These problems can be addressed by using the opposite of a high range water reducer: viscosity modifying admixtures (VMA). VMAs are powdered admixtures that reduce the slump of concrete and help to prevent segregation in aggregate-based concrete.

The strength of high-performance concretes containing SMF and SNF-type superplasticizers is higher than that of reference concrete made at the same slump with no admixture, even if the water:cement ratio is equal. na izany aza, the enhancement of strength is mainly attributable to the reduction in water content caused by the use of these admixtures.