Biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses

Abstract

The invention relates to a bag used for the placement of concrete or grout, either hand placed or pump filled, in and around watercourses. The bags are impermeable and contained in nature, made of biodegradable, degradable or water soluble polymer film, typically made from renewable starch based polymers or water soluble polymers. The bags offer a means of easily and simply placing concrete or grout, safely, cleanly and without risk of contamination to the watercourse or environment from cement leakage, being impermeable in nature, whilst allowing the polymer film to safely degrade, dissolve or disintegrate, in the environment, without the risk of unsightly or environmentally detrimental polythene waste being placed in the watercourse.

1 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, where the bag is formed from a biodegradable or degradable polymer film forming a fully impermeable means of containment to allow concrete or grout to be placed safely in or around watercourses. 
     
     
         2 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where the bags are specifically filled with said concrete or grout and then placed by hand in its intended final position. 
     
     
         3 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where the film material is made from corn, potato, tapioca, wheat or similar derived natural renewable polymer. 
     
     
         4 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claims 2 , where the film material is made from corn, potato, tapioca, wheat or similar derived natural renewable polymer. 
     
     
         5 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where closure of the bag is provided by sewing the top of the bag, Ziploc or similar means. 
     
     
         6 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 2 , where closure of the bag is provided by sewing the top of the bag, Ziploc or similar means. 
     
     
         7 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where closure of the bag is provided by a formal inlet, incorporating a push-in or threaded closure cap or plug. 
     
     
         8 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 2 , where closure of the bag is provided by a formal inlet, incorporating a push-in or threaded closure cap or plug. 
     
     
         9 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where the film bag is formed into extensive mattresses and pump filled with grout, concrete or similar cementitious material. 
     
     
         10 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where the concrete or grout placed within the bags is in its wet state. 
     
     
         11 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 2 , where the concrete or grout placed within the bags is in its wet state. 
     
     
         12 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , where the concrete or grout placed within the bags is in its dry or semi-dry state. 
     
     
         13 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 2 , where the concrete or grout placed within the bags is in its dry or semi-dry state. 
     
     
         14 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , whereby the film bag can be placed within a simple hessian, jute or similar natural fabric bag, to give the appearance of a woven fabric bag. 
     
     
         15 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 2 , whereby the film bag can be placed within a simple hessian, jute or similar natural fabric bag, to give the appearance of a woven fabric bag. 
     
     
         16 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 1 , whereby the polymer forming the film is specifically a water soluble polymer. 
     
     
         17 . A biodegradable or degradable film bag for the placement of concrete or formation of concrete repairs in and around watercourses, as claimed in  claim 2 , whereby the polymer forming the film is specifically a water soluble polymer.