Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1991-01-28
1991-08-27
Silbaugh, Jan H.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
2940218, 52223R, 52514, 52725, 156 94, 156161, 156165, 156172, 156187, 156191, 264 32, 264 35, 264 36, 264135, 264228, 264229, 264262, 264266, 405216, B32B 3500, B65H 8100, E02D 560, E04C 320
Patent
active
050430335
ABSTRACT:
In a concrete column supporting an overhead load and having a base end resting on a surface, a process of strengthening the column to increase its ability to withstand atypical physical loading accompanying an earthquake, involving the steps of defining a work area about the surface of the column to which the strengthening is to be applied, the work area defined by circumferential marginal edges arranged in spaced-apart relation; overwrapping the work area with at least one layer of high-strength, stretchable fibers wherein the fibers are oriented at an angle to the vertical axis of the column; applying a coat of hardenable material, having a modulus at least as great as that of the fibers, over the layer of fibers to form a hard outer shell thereover; and, injecting a quantity of a hardenable, low-shrink liquid under the layer of fibers and over the surface of the work area in an amount sufficient to cause the fibers to undergo stretching from about 1/2% to about 4% of their elongation.
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Aftergut Karen
Murphey John J.
Silbaugh Jan H.
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