PRODUCTION OF AN ECONOMIC HIGH-DENSITY CONCRETE FOR SHIELDING MEGAVOLTAGE RADIOTHERAPY ROOMS AND NUCLEAR REACTORS

, is one of the most common materialsused in the construction of commercialbuildings. Its properties make concrete anexcellent choice for structures, claddingsystems and floor slabs. On the other hand,concrete is widely used for radiation shieldingin radiotherapy facilities and nuclear reactors,and for the prevention of radiation leakagefrom radioactive sources, as well. Although,aggregate has been basically considered as aninert, inexpensive material, it is not truly inertand influences the performance of the concretedue to its physical and sometimes chemicalproperties