ABSTRACT
The work presented in this paper investigates certain aspects of dry soil mixing on a laboratory-scale using a model auger. The effectiveness of the auger in wet soil mixing has already been validated and its application to dry soil mixing is the subject of this paper. This would apply to situations where both methods are required on a particular site and hence it would be economical to use the same equipment. The paper starts with a comparison of two different auger designs in terms of the effectiveness of the mixing of a layered sand. It then concentrates on dry soil mixing and considers a number of variables including in-situ moisture content of the soil, type of additive and percentages added and drilling and mixing techniques. It also investigated the effectiveness of the installation of overlapping columns. The paper provides a comparison between wet and dry soil mixing and presents recommendation for effective dry soil mixing using this auger.
