The study on mix radio design and construction technology of radiation-shielding and high-density concrete

Newly-constructed nuclear facilities requires the shielding concrete with density of 4600 kg/m3 or even higher for shielding of γ rays or neutron rays. Systemic tests and studies on radiation shielding concrete (neutrons and γ-ray absorbing) were conducted in such aspects as mix ratio design, preparation, construction technology, shielding effect, uniform shielding etc. The results show concrete for γ ray could be prepared with an average density of 4670 kg/m3, compressive strength of 37 MPa and permeability-resistant grade of P10. For neutron ray shield, the prepared concrete could be at an average density of 4680 kg/m3, with crystal water of 2.65% (wt) and boron of 0.11% (wt), and compressive strength of 45.6 MPa. (authors)