MECHANICAL IMPROVING OF GRANULAR SOILS BY PERMEATION GROUTING: RESULTS OF LABORATORY TESTS.

The injection of natural soil using proper mixes is one of the most effective ground improvement technique. Consolidation and waterproofing are the two main purposes of these treatments, both in granular soils and in rock masses. The application field of these materials, depends on many external parameters, related to the characteristics of the soil, the injection mixes and injection techniques themselves. For what concerns the laboratory analysis of materials and procedures for injection, there are no normative references relating to the tests to be carried out and often various researchers have developed tests based on procedures designed ex novo. In this paper the most relevant results achieved with a laboratory test campaign is developed using micro-cement and colloidal nano-silica mixes are presented and discussed.