Mesci Başak, Coruh Semra, Ergun Osman Nuri
Department of Civil Engineering, Ondokuz Mayis University, 55139 Samsun, Turkey.
Waste Manag Res. 2009 Feb;27(1):70-7. doi: 10.1177/0734242X07082896.
This research describes the investigation of a cement-based solidification/stabilization process for the safe disposal of copper flotation waste and the effect on cement properties of the addition of copper flotation waste (CW) and clinoptilolite (C). In addition to the reference mixture, 17 different mixtures were prepared using different proportions of CW and C. Physical properties such as setting time, specific surface area and compressive strength were determined and compared to a reference mixture and Turkish standards (TS). Different mixtures with the copper flotation waste portion ranging from 2.5 to 12.5% by weight of the mixture were tested for copper leachability. The results show that as cement replacement materials especially clinoptilolite had clear effects on the mechanical properties. Substitution of 5% copper flotation waste for Portland cement gave a similar strength performance to the reference mixture. Higher copper flotation waste addition such as 12.5% replacement yielded lower strength values. As a result, copper flotation waste and clinoptilolite can be used as cementitious materials, and copper flotation waste also can be safely stabilized/solidified in a cement-based solidification/stabilization system.
本研究描述了用于铜浮选废料安全处置的水泥基固化/稳定化工艺的研究，以及添加铜浮选废料（CW）和斜发沸石（C）对水泥性能的影响。除了参考混合物外，还使用不同比例的CW和C制备了17种不同的混合物。测定了凝结时间、比表面积和抗压强度等物理性能，并与参考混合物和土耳其标准（TS）进行了比较。对铜浮选废料含量占混合物重量2.5%至12.5%的不同混合物进行了铜浸出性测试。结果表明，作为水泥替代材料，尤其是斜发沸石对力学性能有明显影响。用5%的铜浮选废料替代波特兰水泥，其强度性能与参考混合物相似。添加较高比例的铜浮选废料，如12.5%的替代量，会产生较低的强度值。因此，铜浮选废料和斜发沸石可作为胶凝材料使用，并且铜浮选废料也可以在水泥基固化/稳定化系统中安全地进行稳定化/固化处理。
