防辐射混凝土的力学性能研究

Study on Mechanical Properties of Radiation Shielding Concrete

该文系统研究了利用铁矿石、重晶石和金属骨料配制的不同强度等级和密度等级防辐射混凝土的抗压强度、劈裂抗拉强度、轴心抗压强度、弹性模量和钢筋握裹强度。相同水胶比参数条件下的对比结果表明:利用重晶石配制的混凝土各项力学性能指标最差;利用铁矿石配制的混凝土的7d龄期抗压强度最高;掺用金属骨料会降低混凝土的轴心抗压强度、增大弹性模量,对其他力学性能的影响无明显规律。

This paper systematically studied the compressive strength,splitting tensile strength,axial compressive strength,elastic modulus and reinforced bonding strength of radiation shielding concrete with different strength grades and density ranks prepared with barite,iron ore and metallic aggregate.The comparisons of concrete under the same parameters of water-binder ratio showed that:indicators of various mechanical properties of concrete prepared by barite are the lowest;the compressive strength of concrete prepared by iron ore at 7d age is the highest;the mixing of metallic aggregate would reduce the axial compressive strength and increase elastic modulus of concrete,and effects on other mechanical properties shows no apparent rule.