Deep mix soil stabilization method

A deep mix soil stabilization method comprising:

• drilling into soil while injecting a soil dispersant and subjecting the soil and the soil dispersant to mixing to form a soil and soil dispersant mixture, said soil dispersant comprising at least one of i) an acrylic acid polymer or copolymer, or a salt thereof, ii) a copolymer of acrylic acid and sulfonic acid, or a salt thereof, and iii) a copolymer of acrylic acid and phosphonic acid, or a salt thereof, and iv) a blend of an acrylic acid polymer with at least one of a sulfonic acid polymer and a phosphonic acid polymer, or a salt thereof;
• and, mixing a cementitious binder with said soil and soil dispersant mixture to form a predominantly soil-containing stabilized soil, wherein the soil dispersant is a graft polymer comprising at least one of a ketone-aldehyde condensation or co-condensation product and salts thereof, wherein said product comprises:
• a) a ketone containing aliphatic, araliphatic, cyclic or aromatic hydrocarbon radicals, provided at least one radical is nonaromatic;
• b) an aldehyde of the formula R--(CHO).sub.n, wherein n=1 to 2 and R is hydrogen or an aliphatic, araliphatic, aromatic or heterocyclic radical;
• and,
• c) an acid group selected from the group consisting of carboxyl, sulfo, sulfamido, sulfoxy, sulfoalkylamine and sulfoalkyloxy;
• to which product at least one of anionic, nonionic, and cationic unsaturated monomers are grafted.