COMPRESSIVE STRENGTH AND ANTI RADIATION SHIELDING OF CONCRETE BY PARTIAL REPLACEMENT OF COARSE AGGREGATE BY BARITES AND CEMENT BY SILICA FUME

Harinath Balimidi , Ramesh Sarakadam

Abstract: An outgrowth of the development of nuclear energy, heavy density concrete is gaining wide spread use as a shielding material to provide protection against radiation hazards. It is also known as radiation shielding concrete. In contrast with conventional concrete weighing around 150 pounds per cubic foot, high-density concretes normally weigh from 200 to 250 pounds per cubic foot. Among the natural aggregates most commonly used are barite, magnetite, limonite, and hematite. The density will depend on the type of aggregate used. The high density concrete protects from harmful radiations X-rays, gamma rays, neutrons. Integral part of this project is to replacement of coarse aggregate with barite and natural sand is used as fine aggregate and 4% of silica fume are used by weight of cement. Water-cement ratio is to be kept same as that of normal concrete. The properties of HDC Concrete are low thermal expansion, creep deformation and high modulus of elasticity.

Keywords: High Density Concrete, Barite, Silica Fume.

DOI: https://doi.org/10.15623/ijret.2016.0505071