Grouting composition
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United States of America Patent
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Oct 23, 1990
Grant Date -
N/A
app pub date -
Aug 12, 1988
filing date -
Aug 12, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A grouting composition for sealing a borehole or other cavity comprising 90-99.9% finely divided water swellable clay and 0.1-10% thinner. The grouting composition is mixed with fresh water to provide a completely reswellable, unflocculated, easily placed, low permeability sealing composition. The thinner allows a very high concentration of water-swellable clay in the composition. A preferred grouting composition comprises 98-99.9% sodium bentonite and 0.1-2% polyacrylate thinner. In use, 50 lb. of the preferred grouting composition is mixed with 11-14 gallons fresh water, to provide a grouting mixture which comprises about 30-35% reswellable solids.
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