IN-SITU STABILIZATION OF SOIL WITH LIME AND CEMENT

In-situ stabilization of soil with lime is mainly used to construct high-quality pavement foundations or to enable low-quality materials to be used in embankments. The addition of lime leads to an immediate reduction in the soil moisture content and to longer-term modifications and improvement in mechanical characteristics. Mixed stabilization with lime and cement results in the reduction of moisture content and the rapid increase of compressive strength. In both cases, the stability of the soil in the presence of water and frost is markedly improved. Before these two types of treatment are applied, preliminary methodical and accurate studies must be conducted if best results are to be obtained. The execution of the operations requires a detailed investigation of the construction site to ensure the correct selection of the technique and equipment to be used. Construction controls should comprise a study of the soil before stabilization of the quality of the binders used, proportioning and mixing. It is imperative that control tests be conducted sufficiently quickly to give results in a very short time. The invoices in the contract should be as detailed as possible to enable the necessary adaptation to real conditions to be made on site. /TRRL/