STABILIZATION OF SALINE SOILS BY DIFFERENT ACTIVE TECHNIQUES

Abstract

Saline soil scattered wide range of Iraqi territory. Its presence causes engineering problems, which arising for Structural sons erected thereon, due to collapse behavior, when moisturizing with water from any source, due to the rapid melting of the salt molecules surrounding soil granules, leading to the disintegration of the ties of the soil. This study sheds light on the possibility of stabilizing saline soil, using a layer of graded sand with 140 mm thickness, mixed with some available additives:(1%, 3%, 6% of Fly Ash with polyester), (1%,3%,6%, 10% of Emulsified Asphalt),(5% and 10% Bentonite), (1.5% and 3% of Lime material)l, (2% and 5% of Cement material), with and without reinforcement. and investigates its effects on the collapsibility of such problematic collapsible soil. The soil used in this study was natural saline soil with 10% salinity retrieved from a region near Jurf Al-Milih region, in Diyala governorate. Number of tests was conducted using laboratory model of thick container with 400mm height and 300mm diameter. The best improvement was achieved by using a layer of graded sand mixed with 10% Bentonite. This technique reduces the collapsibility to 96%. While mixing the graded sand layer with (5% cement, and 14.2% of randomly distributed waste ferrous materials), reduces the collapsibility to 94%.