Underwater concrete anti-washout admixtures increase the cohesion of the concrete in a way that significantly reduces the washing out of cementitious material and sand from fresh concrete placed underwater. Anti-washout admixtures are often used in conjunction with superplasticizers to produce flowing self-leveling concrete to aid placing and compaction underwater.

  • It is added to concrete mixture to be able to place it underwater without facing segregation and bleeding.
  • As the amount of anti-washout admixture is increased, the rate of dispersion of concrete is decreased, which is an advantage during concreting underwater.
underwater concrete admixtures.jpg