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Copper slag as fine aggregate for high performance concrete

机译：铜渣作为高性能混凝土的精细聚集体

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This paper presents results from an experimental investigation carried out to study the potential use of copper slag as fine aggregate on the strength of both normal and high strength concrete. Concrete mixtures were prepared using different proportions of copper slag as partial and full replacement of fine aggregate. The percentage of copper slag added by weight ranged between 10-100% of sand used in concrete. For each concrete mixture, six 150mmx150mmx 150mm cubes, three 300mmx150mm dia. cylinders and three 100mmx100mmx500mm prisms were cast. Density, compressive, tensile and flexural strengths were determined at 28-day of curing. Cube compressive strength was also determined at 7-day of curing. Results demonstrated that there is general an increase in the density and workability of both normal and high strength concretes as copper siag quantity increases. Also results showed that the compressive strength of concrete is generally improved, compared with the control mix, with the increase of copper slag up to a certain copper slag content beyond which the strength generally reduces. Mixes with large copper slag percentage showed signs of bleeding and segregation due to the significant increase of workability.
机译：本文提出了在进行实验研究的结果，以研究铜渣的潜在用途，作为正常和高强度混凝土的强度。使用不同比例的铜渣制备混凝土混合物，作为细骨料的局部和完全替代。重量加入的铜渣百分比范围在混凝土中使用的10-100％的沙子之间。对于每种混凝土混合物，六个150mmx150mmx 150mm立方体，三个300mmx150mm。瓶子和三个100mmx100mmx500mm棱镜被铸造。在28天的固化下测定密度，压缩，拉伸和弯曲强度。 Cube抗压强度也在固化的7天内确定。结果表明，随着铜SIAG量的增加，正常和高强度混凝土的密度和可加工性的普遍性增加。结果表明，与对照混合相比，通常改善混凝土的抗压强度，随着铜渣的增加，铜渣的增加，超出了一定的铜渣含量，其强度通常会降低。由于可加工性的显着增加，具有大铜渣百分比的混合物显示出血和隔离的迹象。

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