17 research outputs found
Physical and mechanical properties of concrete containing hematite as aggregates
Radiation limits above permission limit have harmful effects on living
bodies (i.e., carcinogenic, etc.). Heavyweight concrete is used in
facilities such as nuclear power plant and radiotherapy room where
radioactive impermeability is required. Aggregate and cement play an
essential role in both the shielding performance and the structural
behavior of concrete. Concretes with 0\% (control), 15\%, 30\%, 45\% and
60\% of conventional aggregate replaced by hematite aggregate for each
control concrete, were fabricated with 300, 350, 400 and 450 kg/m(3)
cement contents. Water-cement ratio was kept constant at 0.40. In
addition to investigation of the mineralogical structure of hematite,
physical and mechanical experiments were carried out on the concrete
produced. The results show that slump and compressive strength, like
other mechanical properties, increase as the hematite aggregate
replacement volume increase