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In recent years the demand for limestone as a building material, a base layer in roadsconstruction and a raw material in cement manufacture in Egypt has markedly increased. Itbecomes therefore a national need not only to satisfy the requirements of this material butalso, to orient these rocks to the optimum uses "techno-economic". The optimum utility ofany limestone deposit determined according to the physical and mechanical properties, whichis used rating and weight to determine the quality index for each deposit site. The qualityindex depends on physical properties such as porosity, density and water absorption andmechanical properties such as compressive strength, tensile strength and coefficient ofdynamic fragmentation. Rating of uses as building material, in road construction, and incement manufacture are considered. All of these parameters are determined for three differentlocations for limestone quarries around Cairo (El Katameya-Ain El Sokhna road, 15th of Maycity, and Ber Gendary in Helwan), and four locations for dolomite quarries (Ataqa Cairo-SuezRoad, El Saf, Wadi Garawi, and Wadi El Gebbu). The final result indicated that, all studiedlocations are suitable for using as building materials except El Saf site.

GEOTECHNICAL ASSESSMENT OF LIMESTONE AND DOLOMITE QUARRIES AROUND CAIRO FOR DIFFERENT PURPOSES