Several attempts have been made to improve the heavy weight concrete mechanical properties for radiation shielding, good workability, high durability, moderate compressive and high tensile strengths, high crack resistance, low permeability, and low shrinkage. In this study, six mixes were organized using coarse and fine aggregate of magnetite with a replacement of cement 15% rice straw ash, 3% polyethylene, 0.3% boric acid, 3% Nano silica, and high range water reducer. All mixes ensured a W/C ratio of 0.4 and cement of 440 kg/m³. The research investigates the fresh properties and mechanical properties of heavy weight concrete. Experimental results appeared that the magnetite aggregate mix with 3% polyethylene improved the mechanical properties than the similar concrete mixes, however, the compressive strength of magnetite with 15% rice straw ash was higher than magnetite with 3% polyethylene as cement replacement materials. Therefore, magnetite incorporating 3% polyethylene enhances the heavy weight concrete mechanical properties for radiation shielding. This study has found that generally, the magnetite incorporating 3% polyethylene is the optimum concrete mix for radiation shielding.

为了改善用于辐射屏蔽的重混凝土的机械性能，良好的可加工性，高耐久性，适度的抗压强度和高拉伸强度，高抗裂性，低渗透性和低收缩性，已经进行了多种尝试。在这项研究中，使用磁铁矿的粗细混合料组织了六种混合物，并用水泥代替了15％的稻草灰，3％的聚乙烯，0.3％的硼酸，3％的纳米二氧化硅和高范围减水剂。所有混合料均确保W / C比为0.4，水泥为440 kg / m ³。该研究调查了重型混凝土的新鲜性能和机械性能。实验结果表明，磁铁矿骨料与3％聚乙烯的混合料比同类混凝土混合物具有更高的机械性能，但是，稻草灰含量为15％的磁铁矿的抗压强度高于水泥含量为3％聚乙烯的磁铁矿的抗压强度。因此，掺有3％聚乙烯的磁铁矿增强了用于辐射屏蔽的重型混凝土的机械性能。这项研究发现，通常，掺有3％聚乙烯的磁铁矿是用于辐射屏蔽的最佳混凝土混合物。