Experimental Study to Effect of adding Emulsion Rubber Material (SPR) for the shear parameters of soil Gypsum

Abstract

Abstract The gypsum is considering one of the problematic soils due to the dissolution of gypsum that occurs when water table or rainfall fluctuates and/or infiltrates into gypseous soils. This paper studies the effect of the emulsified rubber (SPR) material on (shear parameters C & ϕ) the cohesion and the internal friction angle of the gypsum soil. The direct shear test was performed on gypseous soil with different SPR percentages (2, 4, 6 and 8%). The natural gypseous soil was 18.95. The shear strength parameters of the treated soil by SPR are higher than the natural gypseous soil due to the increasing in the cohesion due to increase the shear strength of gypseous soil. The best percentage of SPR to treatment and improve the mechanics of gypseous soil is 2% SPR to be 23.5.