摘   要：分别以赤铁矿、褐铁矿作为重骨料，并掺入适量铁砂，制备了高性能防辐射混凝土，对比研究了重骨料的类型对防辐射混凝土工作性、力学性能、表观密度、屏蔽性能和耐高温性能的影响。结果表明：掺赤铁矿、褐铁矿防辐射混凝土的工作性、力学性能、表观密度和耐高温性能均满足相关工程要求；赤铁矿防辐射混凝土中H、O元素的等效质量密度不满足工程要求，Fe元素的等效质量密度满足工程要求；褐铁矿防辐射混凝土中H、O、Fe元素的等效质量密度均满足工程要求，屏蔽性能较好。综合考虑各项性能，推荐采用褐铁矿作为防辐射混凝土的重骨料。

Abstract: Taking hematite and limonite as the heavy aggregates, and adding appropriate content of iron sand, the high performance radiation shielding concrete was prepared. The influence of the type of heavy aggregates on the workability, mechanical properties, apparent density, shielding performance and high temperature resistance of radiation shielding concrete was studied. The results show that the workability, mechanical properties, apparent density and high temperature resistance of hematite and limonite radiation shielding concrete meet the relevant engineering requirements. The equivalent mass density of H and O elements in hematite radiation shielding concrete does not meet the engineering requirements, but the equivalent mass density of Fe element meets the engineering requirements. The equivalent mass density of H, O and Fe elements in the limonite radiation shielding concrete meets the engineering requirements, and the shielding performance is good. Considering various properties comprehensively, it is recommended to use limonite as the heavy aggregate of radiation shielding concrete.