CONCURE W8 Price In Bangladesh

Concure WB is a white, low viscosity wax emulsion which in-corporates a special alkali reactive emulsion breaking system.This system ensures that the emulsion breaks down to form a non penetrating continuous fi lm immediately upon contact with a cementitious surface. This impervious fi lm prevents excessive water evaporation which in turn permits more effi cient cement hydration, thus reducing shrinkage and increasing durability.
Once formed, the membrane will remain on the concrete surface until eventually broken down and eroded by natural weathering. Where it is required to apply a further treatment to such concrete surface, it may be necessary to remove the membrane remaining after curing by wire brushing or other mechanical means.
The use of curing membranes on internal floor slabs isgenerally to be avoided where additional surface fi nishesare to be applied. Concure WB is however ideal where theconcrete surface of a fl oor slab is to be left as ‘finished’.Uses: For spraying on freshly cast concrete, or newly exposed concrete surfaces after removal of form work, to form a temporary membrane which will retain suffi cient moisture for effective curing to take place. Used for concreting generally but especially useful for large areas of concrete such as pavements, runways and bridge decks; also for vertical or sloping surfaces as on towers, chimneys, canal linings, columns and beams, where water curing is difficult or unreliable.

Advantages:

• Single application : Forms moisture barrier for whole of the curing period.
• No other curing necessary : Eliminates use of water, hessian or sand completely.
• Reliable : No risk of erratic or poor curing and ensures that cement hydrates effi ciently.
• Ensures hard-wearing surface : Minimises risk of drying shrinkage, cracks and dusty surfaces.
• Easy and safe spray application: Non-toxic and nonfl ammable.

Standards compliance: Curing efficiency : Concure WB curing agent complies with the internationally recognised ASTM C309-90 standard.

Application: Exposed concrete slabs : Concure WB should be spray applied on to the newly placed concrete slab as soon as possible after it is free from visible surface water, e.g. typically 1 to 2 hours after placing.
Shuttered and precast concrete : Concure WB curing agent should be spray applied to all surfaces as soon as formwork has been removed or the element demoulded.
In all cases the nozzle of the spray should be held approximately 450mm from the concrete surface and should be passed back and forth to ensure complete and even coverage. The pump pressure should be maintained at a level to produce a fi ne spray ensuring complete coverage of the surface.
Rate of application depends on requirements but is typically within the range of 200 to 285 ml/m2 .

Equipment: The preferred and generally used equipment is a knapsack sprayer of the type commonly used in horticulture or pest control. The ideal type is a knapsack sprayer with a capacity of between 5 – 10 litres fi tted with a 2.0m lance and adjustable spray nozzle.

Equipment cleaning: Immediately after use the spray equipment should be cleaned out thoroughly with fresh water. If the spray nozzle becomes blocked with wax particles these can easily be removed using white spirit or similar fluid.