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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Properties of Heavyweight Concrete for Structural and Radiation Shielding Purposes
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Properties of Heavyweight Concrete for Structural and Radiation Shielding Purposes

机译：重量级混凝土用于结构和辐射屏蔽目的

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摘要

In applications of concrete for shielding against hazardous radiation or for being used as counterweight,as well as in various other applications that involve the use of heavyweight concrete,the most significant method of mix design involves the use of heavyweight aggregates. Concrete mixes that were produced for this work contained iron ore,steel mill scale,two types of barite,and steel slag,which are the heavyweight aggregates available in Turkey. An additional heavyweight concrete mixturewas also produced using magnetite as a natural mineral heavyweight aggregate. In all concrete mixes produced,water/cement ratio,cement content,and the maximum aggregate size of the aggregates used were kept constant. In terms of the main mechanical properties,the best performances were obtained when iron ore was used,while the highest fracture energy values were reached in concretes with steel mill scale,magnetite,or with the combination of steel slag,iron ore,and crushed sand. Another important objective of this research was to evaluate the radiation shielding properties of heavyweight concretes containing iron ore,steel mill scale,two types of barite,or steel slag as aggregates.The experimental results showed that the attenuation coefficient varied from 0.224 to 0.265 1/cm,while the unit weight of heavyweight concrete was increased from 3012 to 3820 kg/m~3. On the other hand,there is reasonably good agreement between theoretical and experimental results of linear attenuation coefficients. It can be concluded that the dominant factor in the determination of attenuation coefficient is the unit weight of heavyweight concrete and that the value of the coefficient is independent of the type of heavyweight aggregate used.
机译：在混凝土屏蔽防止危险辐射或用作配重的应用中，以及涉及使用重量级混凝土的各种其他应用，最重要的混合设计方法涉及使用重量级骨料。为此工作生产的混凝土混合物含有铁矿石，钢轧机规模，两种类型的重杆和钢渣，是土耳其的重量级骨料。额外的重量级混凝土混合物也使用磁铁矿作为天然矿物重量级骨料生产。在所有混凝土混合物中，使用水/水泥比，水泥含量和使用的聚集体的最大骨料尺寸保持恒定。就主要机械性能而言，使用铁矿石时获得最佳性能，而在具有钢轧机秤，磁铁矿或钢渣，铁矿石和碎砂的组合的混凝土中达到最高断裂能量值。该研究的另一个重要目标是评估含有铁矿石，钢轧机，两种重晶石或钢渣作为聚集体的重量级混凝土的辐射屏蔽性能。实验结果表明，衰减系数从0.224变化到0.265 1 / CM，而重量级混凝土的单位重量从3012增加到3820kg / m〜3。另一方面，在线衰减系数的理论和实验结果之间存在合理良好的一致性。可以得出结论，衰减系数测定的主导因素是重量级混凝土的单位重量，并且系数的值与所使用的重量级骨料的类型无关。

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