The distribution and characterization of expansive soils in Mongolia

Geological distribution and geotechnical characterization of expansive soils in Mongolia were summarized. Expansive soils are distributed in around 35% of total area of Mongolia. Distribution of expansive soil is illustrated in a geological map and the engineering geological and geotechnical properties are given for each region in a table. For the geological period, it was noted that expansive soils in Mongolia formed in the end of Cretaceous, Mesozoic era, to Neocene or Quaternary of Tertiary era. Swelling potential is high in Dundgobi-Sainshand region and Baganuur region, is medium in Gurvan Saikhan, Zaamar and Orkhon-Selenge region and is low in other areas.