MasterMatrix UW 444

Anti-washout powder admixture for underwater concrete

MasterMatrix UW 444 anti-washout admixture is a ready to use, powdered admixture specially developed for concrete placed underwater. Concrete treated with MasterMatrix UW 444 exhibits superior resistance to washout of cement and fines.

Fields of application

MasterMatrix UW 444 admixture is recommended for use in all types of concrete pumped or placed underwater, where thixotropic action is desired. MasterMatrix UW 444 admixture is especially helpful in extreme conditions where conventional concrete or placing techniques would result in a high percentage of material loss due to washout.

Benefits

MasterMatrix UW 444 admixture produces a concrete mixture highly resistant to washout, while maintaining workability, pumpability, and placeability. The following special qualities are also provided:

• Minimal to no effect on water demand.

• Reduces or eliminates concrete bleeding.

• Slump characteristics equal to untreated concrete.

• Virtually eliminates segregation even with highly fluid, high water-cementitious ratio mixes.

• Reduces/eliminates costly methods of de-watering.

• Thixotropic action provides stiffening after concrete is placed.

• Minimises environmental impact of cement washout in water.

• Minimal to no effect on set time.