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| 蛇纹石-磁铁矿混掺混凝土的高温防辐射性能探究 |
| high temperature radiation protection performance of serpentine-magnetite mixed concrete |
| 投稿时间：2024-05-03 修订日期：2024-05-14 |
| DOI： |
| 中文关键词: 蛇纹石混凝土 磁铁矿混凝土 防辐射性能 高温 |
| 英文关键词:Serpentine concrete Magnetite concrete Radiation resistance hyperthermia |
| 基金项目:国家自然科学基金项目（51678286）：防辐射混凝土率效应、动力损伤分形特征及破损机理研究 |
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| 中文摘要: |
| 防辐射混凝土在实际使用的过程中往往面对诸多复杂工况,由于事故、反应堆热传递等因素在使用期限内经常暴露于高温环境下。本文使用蛇纹石与磁铁矿作为骨料,制备了五种不同配合比的蛇纹石-磁铁矿混掺混凝土,测试了不同配合比的混掺混凝土在高温加热后的γ射线屏蔽性能。结果表明：随着蛇纹石占比升高,800℃高温加热后残余线性衰减系数从82.92%降低至79.32%,蛇纹石骨料占总骨料质量的比例增高会使得γ射线屏蔽性能劣化速度更快。纯磁铁矿混凝土常温和高温的γ射线屏蔽性能均要优于纯蛇纹石混凝土与蛇纹石-磁铁矿混掺混凝土。 |
| 英文摘要: |
| Radiation-proof concrete is often exposed to high temperature environment during its practical use due to accidents, reactor heat transfer and other factors. In this paper, serpentine and magnetite were used as aggregates to prepare five kinds of serpentine-magnetite mixed concrete with different proportions. The γ-ray shielding properties of the mixed concrete with different proportions were tested after heating at high temperature. The results show that with the increase of serpentine proportion, the residual linear attenuation coefficient decreases from 82.92% to 79.32% after heating at 800℃, and the proportion of serpentine aggregate to total aggregate mass increases, and the deterioration rate of γ-ray shielding performance is faster. The γ-ray shielding performance of pure magnetite concrete is better than that of pure serpentine concrete and serpentine-magnetite mixed concrete at room temperature and high temperature. |
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