【摘 要】
：
Reactivity and cementitious properties of copper tailings irradiated by microwave at different power has been investigated.The dissolution quantities of Si4+, Al3+ of irradiated copper tailings were t
【机 构】
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School of Materials Engineering, Yancheng Institute of Technology, Yancheng 224051, P.R.China
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Reactivity and cementitious properties of copper tailings irradiated by microwave at different power has been investigated.The dissolution quantities of Si4+, Al3+ of irradiated copper tailings were tested by inductively coupled plasma emission spectrometer, the irradiated copper tailings and the microstructure of the copper tailings-cement were examined by XRD, TG-DTA and SEM.The results show that the copper tailings irradiated at power 800W has the-optimum cementitious properties, and activate Si4+ and Al3+ dissolution quantities are37.3 and 34.7mg.g-1, it is compared to the raw copper tailings to increase by 56.7% and 31.4% respectively.When coal copper tailings at 800W are mixed into Portland cement, the content of calcium hydroxide in paste is significantly reduced, while the microstructure and the hydration degree of paste are improved, hence resulting in the compressive strength is increased.The heavy metals elements in the copper tailings are effective curing in cement pastes and dont pollute the environment.
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