Efectos de la estructura en las propiedades indice de un suelo residual derivado de ceniza volcánica

Abstract

The residual soils derived from volcanic ash are found in the areas surrounding the volcanoes in populated areas and sites where important engineering projects are carried out every day in Colombia, for example, this type of soil is present in the areas where the municipalities of Manizales, Armenia, Popayán and Ipiales. Residual soils are cemented materials, therefore they have an internal structure, which generates atypical properties and behavior, which in the last decades have not been fully addressed. In order to know in detail the changes generated in this type of materials by the conditions imposed during the drying and the remodeling, this study was generated with the first objective to collect the state of knowledge about the residual soils derived from volcanic ash and Second, develop an experimental program with sampled soils in the areas of Armenia (Quindio) and Palestina (Caldas) in Colombia, to recognize the changes that may occur in their index properties. The results show that the material tested contains the clay mineral called "allophane" and its index properties as limits of consistency, plasticity index and granulometry vary according to the pre-treatment conditions defined in the ASTM and INVIAS standards.