Patent ID: 7565779
Filing Date: 2009-07-28
Classification: E02D,E21D

Abstract:
1. A method of providing a free-flowing active substance to a structure in situ, said method comprising: providing an integral, multi-layer fluid delivery device comprising a first layer, said first layer having an inwardly facing surface and an outwardly facing surface, said first layer being permeable to said active substance but at least nearly impermeable to a structural construction material to be applied against the outwardly facing surface of said first layer, and a second layer, said second layer being water impermeable and having an inwardly facing first side and an outwardly facing second side, said inwardly facing first side of said second layer being affixed directly or indirectly to said inwardly facing surface of said first layer such that all or a substantial portion of said second layer is spaced apart from said first layer to create air space between said first layer and said second layer; attaching said integral, multi-layer fluid delivery device to a structural substrate so that said outwardly facing second side of said second layer faces said substrate; attaching one or more additional integral, multi-layer fluid delivery devices to said structural substrate, wherein the second layer of each integral, multi-layer fluid delivery device includes an extension portion and wherein each device is overlapped with a previously attached device on said extension portion; affixing a plurality of tubes to said first layer so that they extend outwardly therefrom, said tubes being adapted to permit inflow of said active substance into said air space; placing a concrete form or framework adjacent said outwardly facing surface of said first layer so that said plurality of tubes are affixed to and extend through said form or framework: applying concrete to said form or framework such that it contacts said outwardly facing surface of said first layer and allowing it to harden: and injecting said free-flowing active substance through one or more of said plurality of tubes to partially or completely fill said air space with said active substance.