Composite product

Abstract

A composite product comprising a substrate layer and one or more functional layers applied thereto. The slurry is applied to the substrate layer to form a functional layer and the functional layer dewatered through the substrate layer. The functional layers can be repeated to build up a laminated composite product. Functional additives may be included in each layer to provide desired properties to that layer and indeed to the subsequent composite product.

1 . A composite product comprising a substrate layer and one or more functional layers applied thereto, each functional layer including a mixture of hydraulic binder, dewatering agent wherein the quantity of dewatering agent is sufficient to permit de-watering of each functional layer through the substrate layer and any additional functional layer.  
   
   
       2 . A composite product according to  claim 1 , wherein each functional layer includes one or more functional additives to provide desired properties to that layer.  
   
   
       3 . A composite product according to  claim 1 , wherein the substrate layer is a fibre reinforced base material.  
   
   
       4 . A composite product according to  claim 1 , wherein the substrate layer is a reinforced cementitious product.  
   
   
       5 . A composite product according to  claim 1 , wherein the functional layers are added to both sides of the substrate layer.  
   
   
       6 . A composite product according to  claim 1 , wherein the functional layers are added to one side of the substrate layer.  
   
   
       7 . A composite product according to  claim 1 , wherein each functional layer is covered by a reinforcing layer.  
   
   
       8 . A composite product according to  claim 7 , wherein the reinforcing layer comprises fibre mesh or netting.