Delivery device for concrete admixtures and process for retarding the setting of surface portion of concrete
OwnerDavid Malcolmsoninventor
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Abstract
A delivery device for concrete admixtures, in the form of a film of water-soluble material, having a concrete admixture incorporated within the film. The film can be attached to a formwork for concrete and has a protective layer, which is removable to allow the water in the concrete to dissolve the film and release the admixture into the concrete. The film contains the required quantity of admixture and is weather-resistant and substantially time-insensitive.
Claims14
A delivery device for concrete admixtures, the device comprising a delivery film consisting of water-soluble material, having a concrete admixture incorporated within the delivery film, the delivery film having a first surface and an opposite second surface, the first surface having a means to attach the film to a formwork for concrete and the second surface having a removable protective liner, the delivery device configured so that the water-soluble material is capable of being dissolved by water in the concrete to thereby release the admixture into the concrete, wherein the means to attach the delivery film to the formwork comprises an adhesive layer applied to an adhesive support film at the first surface.
Dependencies are inferred from the claim text.