الفهرس 
Uses & applications of heavyweight concrete
Fundamentals of RadiationOnly 14 pages are availabe for public view
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Abstract
Nuclear structures are special structure, that require the use of
heavyweight concrete because it has good radiation shielding properties
and can be used in structural elements. Heavyweight concrete is used as
a biological shielding material to protect against the harmful effects of Xrays,
gamma rays and neutron radiation in the nuclear facilities structures.
When heavyweight concrete is used to absorb X-ray or gamma ray, the
density is of prime importance, When the concrete is to attenuate
neutrons, materials of light weight containing hydrogen such as boron
should be included in the concrete.
This research work investigates heavyweight concrete using local
heavyweiqht aggregate, as ilmenite and baryte and compare it to
conventional concrete. The research presents a brief review of the
different aggregates which are used to produce heavyweight concrete and
data on the physical and chemical properties of ilmenite and baryte
aggregates. It also includes the pervious experimental and theoretical
studies carried out on the mechanical properties and radiation shielding
properties of different types of heavyweight concrete used as shielding
materials. The effect of silica fume and the effect of elevated temperature
on both heavyweight concrete properties and conventional concrete are
reviewed. A brief review of the types of radiation, units of radiation, dose
limits, interaction of photon with matter, interaction of the neutron with
matter and mechanics of shielding and different shielding materials is also
given
The experimental program was designed to obtain the highest unit
weight of the concrete mix and study the physical and mechanical
properties of ilmenite concrete, baryte concrete and conventional
concrete. Also a study on the effect of silica fume on the mechanical and
radiation shielding properties of heavyweight concrete compared to