摘要
Loessic soil in the north-west of Argentina, which consists of silt and silty clay with reduced content of fine sand, has collapsible characteristics. This means that by increasing the moisture content close to the liquid limit value, the loess soil＇s macro porous structure breaks experiencing large volumetric deformations. The collapse pressure and soil constrained modulus are fundamentals parameters for the characterization of these soils and the study of solutions to geotechnical problems. In this work we study the loess from the north-west region of our country, especially the Santiago del Estero＇s plain, based on numerous field tests and laboratory tests in order to correlate the modulus and collapse pressure from double-odometer test with the blow count from SPT （standard penetration test）. It also analyzes the influence of these parameters on moisture content, void ratio and the presence of salts and calcareous concretions in soils and discusses the validity of these correlations as well as those proposed by other authors.
