CEMIX CONCRETE CURE WATER BASED (WB) is a white, low viscosity wax emulsion which incorporates a special alkali reactive emulsion breaking system. This ensures that the emulsion breaks down to form a non-penetrating continuous film immediately upon contact with a cementitious surface. This impervious film prevents excess water evaporation that in turn permits more efficient cement hydration thus reducing shrinkage and increasing durability. The membrane once formed is designed to degrade (via a photonitator in the clear formulation) when exposed to ultra violet light over a period of time dependent on conditions of exposure.
TYPICAL APPLICATIONS & USES
CEMIX CONCRETE CURE WB provides a spray-on temporary membrane to retain moisture in concrete for effective curing. Used for concreting generally, but especially useful for large areas of concrete construction such as runways, motorways or bridgeworks.
The surface should be dry and must be free from oil, grease, loose particles, decayed matter, moss, algal growth and curing compounds. For maximum penetration, grit blasting, water blasting or some mechanical means of surface preparation is recommended. Water blasting or an acid wash should be used for the removal of moss or algal growth. Rinse off with liberal quantities of clean water and allow to dry. Protect plants, grass, asphalt, bitumen, plastics and all painted surfaces during preparation and application. Always test apply on an area first and approve look and feel.
CEMIX CONCRETE CURE WB should be spray applied to the surface of newly placed concrete. The compound should be applied as soon as possible after the concrete is free from surface water. The nozzle of the spray should be held approximately 450mm from the concrete surface and should be passed back and forth to ensure complete coverage. The pump pressure should be maintained at a level producing a fine spray.
Note: Do not use CEMIX CONCRETE CURE WB for any concrete work receiving subsequent coatings or renders. CEMIX CONCRETE CURE WB should not be continuously re-circulated through high shear gear pumps when used in concrete train application. If continuous re-circulation is essential the sprayer should be fitted with a low shear diaphragm pump. Rate of application depends on requirements but is typically within the range 169 – 270ml/m2 (6.0 – 4.0m2/l).
The data shown above reflects typical results based on laboratory testing under controlled conditions. Reasonable variations may occur on site.
Will break down in time dependent on exposure to weather. Any remaining film may impair application of subsequent coatings and should be removed first.
Equipment should be cleaned with solvent immediately after use. Any spillages should be absorbed with sand or sawdust etc. and disposed of in accordance with local regulations.
STORAGE / SHELF LIFE
CEMIX CONCRETE CURE WB has a shelf life of six (6) months when stored at temperatures between 4ºC – 35ºC. Containers should be kept airtight to prevent surface evaporation. Freezing or prolonged exposure to direct heat or sunlight must also be avoided.