| US 7,565,779 B2 | ||
| Device for in-situ barrier | ||
| Brian J. Iske, Nashua, N.H. (US); Jyoti Seth, Andover, Mass. (US); Xia Cao, Arlington, Mass. (US); Sonya M. Santos, Jamaica Plain, Mass. (US); and Enzo J. Orellana, Somerville, Mass. (US) | ||
| Assigned to W. R. Grace & Co.-Conn., Columbia, Md. (US) | ||
| Filed on Aug. 30, 2006, as Appl. No. 11/468,544. | ||
| Application 11/468544 is a continuation in part of application No. 11/066927, filed on Feb. 25, 2005. | ||
| Prior Publication US 2007/0199265 A1, Aug. 30, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. E04B 1/00 (2006.01); E04G 21/00 (2006.01); E04G 23/00 (2006.01) | ||
| U.S. Cl. 52—742.13 [52/745.19; 52/746.1; 52/169.14; 52/414; 52/380] | 31 Claims |
| 20. A method of providing a free-flowing active substance to a structure in situ, said method comprising:
providing at least two multi-layer fluid delivery devices, each of said devices comprising a first layer, said first layer
being permeable to said free-flowing active substance but at least nearly impermeable to structural construction materials,
an intermediate layer permeable to said free-flowing active substance, a second layer, said second layer being impermeable;
attaching a first multi-layer fluid delivery device to an excavated surface;
overlapping a second multi-layer fluid delivery device onto an extension of said first multi-layer fluid delivery device;
abutting said second multi-layer fluid delivery device against said first multi-layer fluid delivery device;
attaching said second multi-layer fluid delivery device to said excavated surface;
installing at least one division strip between said at least two multi-layer fluid delivery devices;
applying a structural construction material exterior said at least two multi-layer fluid delivery devices;
determining an area of failure in said at least two multi-layer fluid delivery devices;
drilling a plurality of holes proximate said area of failure; and
selectively introducing said free-flowing active substance to at least one of said two fluid delivery devices through at least
one said plurality of holes.
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