中文摘要：

将氧化铋以粉末形式添加到普通混凝土中,制备出绿色无污染且具有良好的？射线屏蔽性能的掺杂氧化铋的混凝土。相较于普通混凝土,氧化铋-混凝土的屏蔽性能及力学性能均得到改善。对比屏蔽性能实验结果及MCNP5（Monte Carlo N-Particle 5）模拟结果,二者相符很好,可以用MCNP5进行后期配合比设计优化。运用田口方法对水泥量、水胶比、氧化铋比例及砂率等进行优化设计。结果表明,对氧化铋-混凝土屏蔽能力影响最大的参数是氧化铋的加入量,其次为水泥量,水胶比及砂率的影响可忽略。

英文摘要：

Background： To enhance the shielding properties of concrete mixtures, there is a tendency toward using various additives while most of these additives being used either pose hygiene hazards or require special handling processes. Purpose： To ensure the concretes being environmentally friendly and providing sufficient gamma ray radiation shielding efficiency, Bi2O3-10aded concrete mixtures are researched and optimized. Methods： Both experimental and theoretical methods were used to calculate the linear attenuation coefficient before using the Taguchi method to optimize concrete＇s mix proportion which includes cement quantity, water-to-cementitious material ratio, Bi2O3 rate and sand ratio. Results： The shielding abilities and mechanical properties of BizO3-1oaded concretes were improved compared with ordinary concrete. There was small inconsistency between results obtained by MCNP5 （Monte Carlo N-Particle 5） program and experiment. Conclusion： It was suggested in the study that the most important parameter affecting the attenuation of the concrete＇s radiation is the Bi2O3 rate while cement quantity is the following factors, and the effects of water-to-cementitious material ratio and sand ratio are negligible.