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 watersoluble 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. The delivery device is used in a process to retard the setting portion of a surface of concrete.
Claims14
A delivery device for concrete admixtures, the device comprising a delivery film of water-soluble material, having a concrete admixture incorporated within the film, the film having a first surface and a second surface, the first surface having a means to attach the film to a formwork for concrete and the second surface having a protective liner, which is removable to allow the water in the concrete to dissolve the film and 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.
Dependencies are inferred from the claim text.