Author:
Iqbal Prahara,Puswanto Eko
Abstract
Abstract
Hydrothermal alteration occurs in andesitic rocks in the study area due to the presence of the Great Sumatran Fault. This study shows the consequences of this phenomenon on the characteristics of volcanic residual soils. This study comprises volcanic residual soils formed from the same andesitic rocks in a site located in West Lampung, Sumatra, Indonesia which has a tropical climate. Chemical, physical, and mineralogical characterizations were carried out to describe the materials and the changes imposed by their alteration. Effects of alteration on the soil’s behavior were assessed in terms of plasticity.