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混凝土与制品
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铜尾矿粉的制备及应用于UHPC中的配合比设计研究

作者：鲁亚1，2，刘松柏1，2，施麟芸1，2

关键字：铜尾,矿粉,的,制备,及,应用于,UHPC,中的,

　
（1.江西省建筑材料工业科学研究设计院，江西 南昌  330000；2.江西省超高性能混凝土工程研究中心，江西 南昌  330000）
    摘要：采用不同磨机对铜尾矿进行粉磨，分析对比不同磨机的粉磨效率、粉磨后的粒径分布区间等特征，并将不同粉磨方式处理的铜尾矿作为填充料应用于超高性能混凝土（UHPC）中，进行配合比设计研究。结果表明：实验室行星球磨粉磨效率较高，不同粉磨时间的铜尾矿粒径分布范围接近现有矿物掺合料的粒径分布，工业化气流磨可以对铜尾矿进行微纳米化处理；根据颗粒最紧密堆积理论，利用改进Andreason模型，结合软件模拟和实验进行掺铜尾矿UHPC配合比设计，铜尾矿（粉）作为填充料分别替代相应粒径区间的原材料，掺铜尾矿UHPC的流动性能和力学性能不会降低，且不同龄期的重金属离子浸出毒性也符合相关规范要求。
    关键词：铜尾矿；粉磨；超高性能混凝土；UHPC；配合比设计
    中图分类号：TU528.31        文献标识码：A        文章编号：1001-702X（2020）06-0033-05
 
Preparation of copper tailings powder and its mix ratio design in application of UHPC
LU Ya1，2，LIU Songbai1，2，SHI Linyun1，2
（1.Jiangxi Research and Design Institute of Building Materials Industry，Nanchang 330000，China；
2.Jiangxi Super High Performance Concrete Engineering Research Center，Nanchang 330000，China）
    Abstract：Different grinding mills were used to pulverize copper tailings，and the characteristics of grinding efficiency and particle size distribution range after grinding were analyzed and compared. Moreover，copper tailings treated by different grinding methods were used as filling materials in UHPC to conduct mix design research. The experimental results show that：the laboratory grinding efficiency is high，the particle size distribution range of copper tailings with different grinding time is close to that of existing mineral admixtures，and the industrial air milling can conduct micro-nano treatment of copper tailings. According to the particle is the most close packing theory，the improved Andreason model，combining with the software simulation and experimental research on mixed copper tailings of UHPC mixture ratio design，copper tailings（powder） as a filling material substitution respectively corresponding particle size range of raw materials，mixing flow properties and mechanical properties of copper tailings UHPC did not reduce，and leaching toxicity of heavy metal ions of different ages have completely accord with national regulations.
    Key words：copper tailings，grinding，ultra-high performance concrete，UHPC，mix ratio design