%0 Conference Proceedings %T Investigation of Shear Strength Parameters for Gypseous Soils Using a Modified Apparatus of Triaxial Test %A Abdalhusein, Mustafa %A Akhtarpour, Ali %A Almahmodi, Rusul %A محمد شاکر محمود %J THIRD INTERNATIONAL CONFERENCE ON GEOTECHNICAL ENGINEERING-IRAQ %D 2022