The uses of a plasticizer in concrete
Concrete plasticizer which is commonly known as water
reducing admixture amongst professionals is used for improving workability of
concrete.
The strength of concrete is a major function of water
cement ratio. Higher the amount of water in fresh concrete, the less the
strength we will get.1 % increase in water cement ratio reduces strength of
concrete by 5%. Normally there is a tendency amongst workers to add more water
as it makes concrete workable during construction, so casting of concrete can
be done easily by the workers. If excess amount of water is added during
construction, then homogeneity of the concrete mix decreases. This can lead to
segregation or bleeding of concrete.
Concrete plasticizers increases the workability of
freshly mixed concrete without increasing the water cement ratio. Concrete plasticizers
are added in concrete in amount of 0.1 % to 0.4 % by weight of cement. Addition
of these doses reduces 5 to 15% of water requirement in the concrete mix with
constant work ability. Concrete plasticizes are usually used in ready-mix
concrete, mass concreting, high strength concrete, etc.
Comments
Post a Comment