Geotechnical Properties of Tel-Afar Gypseous Soils


Six gypseferous soil samples were collected from Tel-Afar area, northern Iraq. geotechnical properties were determined. Tests were conducted on specimens containing different gypsum contents. The testing program comprises the determination of the natural gypsum content effect on the shear strength characteristics of the soil specimens under consideration. The results showed that the shear strength of Tel-Afar soils increases as gypsum content increases, while shear characteristics (cohesion= C, and the angle of internal friction=Ø) revealed different behavior when gypsum added to a natural soil. When the gypsum content increases the C value decreases whereas the Ø increases.