CALCAREOUS SAND OF NORTHERN COAST IN EGYPT (COMPARATIVE STUDY)

Shahien, Marawan; Sakr, Mohamed; Abdelkader, Tarek; Saody, Aiman

doi:10.21608/asge.2022.152742.1018

CALCAREOUS SAND OF NORTHERN COAST IN EGYPT (COMPARATIVE STUDY)

Document Type : Original Article

Authors

¹ Structural Engineering Department, Faculty of Engineering, Tanta University.

² Geology Department, Faculty of Science, Tanta University

³ Structural Engineering Department, Faculty of Engineering

10.21608/asge.2022.152742.1018

Abstract

Construction on calcareous sandy deposits is a challenging task for geotechnical Engineers due to the difference in behavior and characterization of calcareous sands than those of conventional siliceous sands. Calcareous deposits exist in Egypt along the coasts of Egypt especially along the north coast. This article represents a comparative study between the calcareous sand from many sites of North Coast of Egypt and siliceous sand from Egypt. The geological and geotechnical properties of northern coast calcareous sand have been studied. The laboratory tests are including chemical, physical and mechanical properties. The chemical analyses of sand samples were adopted to determine carbonate content. The micro structure of tested samples was investigated using both (XRD) analysis, thin section and scanning electron microscopy (SEM). The second part is the physical properties were including determination of specific gravity, grain size gradation and surface texture. The maximum dry density is also obtained using modified proctor test while the mechanical properties of tested soil were included both the shear strength using direct shear box and compressibility using consolidation test. A series of isotropically consolidated undrained direct shear tests were conducted using a Calcareous sand from north coast of Egypt. The tested north coast Egypt Calcareous sand is well graded sand with highly angular grains. Calcareous samples were tested at different initial densities (30%, 50% and 80%), with different carbonate content. The result of current study will compared with Siliceous and calcareous sand in other places for different researchers.

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