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首页> 外文期刊>Magazine of Concrete Research >Durability and mechanical properties of precast concrete curb containing waste copper slag
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Durability and mechanical properties of precast concrete curb containing waste copper slag

机译：含废铜渣的预制混凝土路缘石的耐久性和力学性能

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Copper slag is a by-product which has been widely used in several industries. After being used for abrasive tools, it is discarded in the environment where it can have a harmful impact. The size of copper slag particles ranges up to a diameter of 3 mm, and is of a relatively similar size to fine sand, for which it could therefore be substituted in the production of precast concrete curbing. To this aim, the strength and the durability of curbing were evaluated through a series of tests on six different proportions of waste copper slag ranging from 0 to 100% replacement of fine sand. It is concluded that substituting 40% of fine sand with waste copper slag yields the best mechanical and durability properties. By replacing this proportion, the compressive and bending strength of concrete increased by almost 30% and 14%, respectively. However, a slight effect was found in the total water absorption and abrasive resistance. The freeze-thaw resistance of concrete curbs increased significantly after a 20% replacement by waste copper. This study reveals that it is possible to substitute fine sand with waste copper slag without any negative effect on the properties of the curbing.
机译：铜渣是一种副产品，已广泛用于多个行业。在用于研磨工具后，将其丢弃在可能产生有害影响的环境中。铜渣颗粒的尺寸最大可达到3 mm的直径，并且与细砂的尺寸相对相似，因此可以在预制混凝土固化过程中替代。为了这个目的，通过对六种不同比例的废铜渣（从0％到100％的细砂替代）进行一系列测试，评估了固化的强度和耐久性。结论是用废铜渣代替40％的细砂可获得最佳的机械和耐久性能。通过替换该比例，混凝土的抗压强度和抗弯强度分别增加了近30％和14％。但是，发现总吸水率和耐磨性略有影响。用废铜替代20％后，混凝土路缘的抗冻融性显着提高。这项研究表明，可以用废铜渣代替细砂，而不会对固化性能产生任何负面影响。

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