الخواص الجيوتقنية للصخور الكلسية الحوارية في منطقة منبج شمال حلب

The chalky lime stones are sedimentary rocks. Chalk is a pure, soft, well-jointed limestone composed primarily of the calcareous remains of microorganisms called coccoliths and foraminifera. Pure white chalk contains more than 90% CaCO3 and is usually found in thick beds. Carbonates are chemically reactive; they are soft and soluble in water that influences their engineering performance both as rock materials and as bedrock under the foundations. However, this paper describes the results of laboratory experiments on the different specimens of the chalky lime stones collected from the north of Syria.Their specific gravities, dry and saturated densities and porosity were determined. The porosity increased and the dry densities decreased. Furthermore, the internal angel of friction decreased with increasing porosity. The unconfined compressive strength, shear strength and related properties were also determined.