Silicate-catalyzed chemical grouting compositions (US Patent 3,615,780, 1971)

Young J. Kim, Charles F. Murphy and Reid L. Mitchell received US Patent No. 3,615,780 on October 26, 1971, filed May 28, 1969.

The patent's abstract:

A unique chemical grouting composition is provided for injection stabilization of earth, sand and other porous, particulate formations or agglomerates or solids. The composition produces grouted structures of excellent strength and durability and has a wide range of uses in a system comprising sequential formulation and subsequent injection of on-site-formed aqueous solutions of (a) base materials comprising vegetative polyphenolic material derived from coniferous bark or a tannin of the catechin or condensed type and of (b) catalyst mixtures comprising a water soluble alkali metal silicate, formaldehyde or paraformaldehyde, and sufficient acid to establish the catalyst solution pH at 0.5 to 6.0 and preferably 3-5. Optional modification materials such as asphalt, clay, or a hydraulic cement, or fibrous material such as asbestos, may be included.

Where it was listed

• Asbestos, February 1973, in its patents department (the year's issues)