Stabilization of soft soil using nanomaterials

Abstract

Tests were conducted to investigate the influence of using nanomaterials in the modification and stabilization of soft soil. The soft soils were collected from two sites and treated with three nanomaterial types (nano-copper, nano-clay and nano-magnesium). Nanomaterials were added in small amount (≤1.0%) by dry weight of the soil. Laboratory tests to determine the Atterberg limits, linear shrinkage, compaction characteristics and unconfined compressive strength were performed. Results of the investigation showed significant improvement in maximum dry density, plasticity index, linear shrinkage and unconfined compressive strength. The improvement is dependent on the type of nanomaterials. The unconfined compressive strength and maximum dry density increased as the nanomaterials content increased until reach a percentage after which the strength will be decrease. Thus, the addition of finer particles such as nanomaterials, even at low doses, could enhance the properties of soil.