Full knowledge of the physical and mechanical behavior of limestone rocks is required for the safe design of structures. Little work has been done to characterize the physical and mechanical properties of Jordanian limestone especially under watery environment. Therefore, in this study the physical and mechanical properties of some Jordanian limestone were investigated. The limestone samples were collected from five different parts of the country. The porosity and dry density of the selected limestone were compared. The reduction on the compressive strength and tensile strength for dry, 50% and 100% water saturation were determined. All rock experienced a reduction on both the compressive strength and tensile strength as a function of saturation degree. Large reduction happens on the strength properties for the Zarka limestone than the other limestone when the samples are fully saturated.
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