The ordinary and serpentine concrete shields were made using
local materials have densities 2.3 and 2.4 g/cm3
. The elemental composition
of concrete depends mainly on the mix proportions and the
chemical composition of the materials used. Choice of relative percentage
ingredients, compressive strength, tensile strength and
flexural strength to obtain the mentioned suitable density for ordinary
and serpentine concrete was done by Structural Engineering
Department, Faculty of Engineering, Cairo University, Cairo, Egypt.