Grout for injection in fine soils and compositions for making this grout

摘要

A dry composition, for preparation of a cement grout to be injected into fine soil, consists of an intimate powder mixture of fillers which do not react with water, cement and deflocculant, the filler and cement powders having 10-40 (preferably 10-20) microns particle size. Preferably, the deflocculant powder is a naphthalene or melamine derivative. Also claimed is a grout which is to be injected into fine soil and which is obtained by mixing the above composition with water, the grout having a small particle size and being free from agglomeration of cement and/or filler particles.