After extensive trials and errors, 4 concrete mixes were prepared 
by using the coarse aggregates either Hematite or Dolomite and fine 
aggregate either fine portion of Hematite or sand along with addition to the 
total content of SEM I for each mix. To achieve the high-performance 
concrete, all concrete mixes had a constant water/cement ratio of 0.55, 
cement content of 400 kg/m3 and sand-to-total aggregate ratio of 40-45%.
The hardened concrete mixes were tested for compressive strength at 7, 14 
and 28 days and Compressive strength exposed to elevated temperatures. In 
some concrete mixes, compressive strength was also tested up to 28 days 
upon replacing sand with the fine portions of Hematite.
The hardened concrete mixes were tested for flexure using beams tested up 
to 28 days for measure deflection and cracks pattern.
The attenuation measurements for concrete shielding using different 
thickness of concrete plates were performed by using gamma spectrometer 
of NaI (Tl) scintillation detector. The utilized radiation sources comprised 
137Cs and 60Co radioactive elements with photon energies of 0.662 MeV 
for 137Cs and two energy levels of 1.173 and 1.333 MeV for 60Co.