Flexible grouting composition
AssigneeWyo-Ben, Inc.
InventorStewart W. Krause
Life of this patent
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Abstract
A grouting composition for sealing boreholes or other cavities comprising 90.0-99.99% water swellable clay and 0.01-10.0% gelling agent. The grouting composition is mixed with fresh water to provide an easily placed, low cost, low permeability sealing composition. A preferred grouting composition contains 98-99% sodium bentonite and 1-2% cement. In use 50 pounds of the preferred grouting composition is mixed with 27-38 gallons of fresh water to produce a grouting composition containing 13.7-18.2% solids and having a fluid density equal to or greater than 9.0 lbs/gallon with a Marsh funnel viscosity equal to or greater than 50 seconds.
Claims17
A grouting composition useful for effecting a seal in an earthen borehole or other subsurface cavity, wherein said grouting composition consists by weight essentially of 90.0-99.99% water swellable clay and 0.01-10.0% gelling agent, and wherein said water swellable clay is sufficiently ground so that at least about 80% passes a 200 mesh U.S. standard sieve.
A grouting mixture comprising water and a grouting composition, wherein said grouting composition comprises about 13.7-18.2% by weight of solids and consists essentially of, by weight, 90.0-99.99% water swellable clay and 0.01-10.0% gelling agent, and wherein the ratio of grouting composition to water is within the range of about 50 lbs. of grouting composition per 27 gal. of water to 50 lbs. grouting composition per 38 gal. of water.
A grouting composition useful for effecting a seal in an earthen borehole or other subsurface cavity, wherein said grouting composition consists by weight essentially of 90.0-99.99% sodium bentonite and 0.01-10.0% gelling agent, and wherein said sodium bentonite has an apparent viscosity of from about 4 to 7 centipoise for a suspension of 6 parts bentonite per 100 parts water.
Dependencies are inferred from the claim text.