Performance Test on Shielding Concrete

The cylinder of the shielding concrete is made from common Portland cement and home-made coarse or fine aggregates.Orthogonal design experiment and regression analysis are adopted to study the effects of the water content, sand percentage and water-cement ratio on the property of shielding concrete and the difference between them. The test shows that the tensile strength is in inverse proportion with water-cement ratio, and the influence is quite significant.Another factor is the type of aggregates. The effect of the age on its density is not obvious.Similarly, the concrete shielding γ rays shares the same influencing factors with that shielding neutron rays on density, slump and tensile strength.And both have the same change rules regarding to mechanical property.