Importance

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Abstract

A flexible grout composition and method of disposing the composition in position, in contact with an earthen formation, such as a coating on a trench wall, or within a bore hole, for example to cement a conduit within the bore hole to prevent fluid loss, for sealing and grouting well casings, plugging abandoned wells, and waterproofing earthen structures, particularly in environments where the grout composition is in contact with contaminated water. The flexible grout composition includes a water-swellable clay, such as sodium bentonite; an optional solid particulate filler, such as an essentially nonswellable bentonite clay, such as calcium bentonite, herein defined as a bentonite clay having calcium as the predominant exchangeable cation; a water-soluble polymer; and an optional dispersing agent, such as sodium acid pyrophosphate (SAPP).

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First Claim