[1]钱振东,许子健,闵一桐,等.铜尾矿作沥青混合料填料的可行性与环境影响评估[J].长安大学学报(自然科学版),2025,45(3):17-25.[doi:10.19721/j.cnki.1671-8879.2025.03.002]
　QIAN Zhen-dong,XU Zi-jian,MIN Yi-tong,et al.Feasibility and environmental impact assessment of copper tailings as asphalt mixture filler[J].Journal of Chang’an University (Natural Science Edition),2025,45(3):17-25.[doi:10.19721/j.cnki.1671-8879.2025.03.002]
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铜尾矿作沥青混合料填料的可行性与环境影响评估()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年3期
页码:
17-25
栏目:
道路工程
出版日期:
2025-05-31

文章信息/Info

Title:
Feasibility and environmental impact assessment of copper tailings as asphalt mixture filler
文章编号:
1671-8879(2025)03-0017-09
作者:
钱振东1; 许子健1; 闵一桐1; 胡帮艳1; 2; 曹峥3
(1. 东南大学 智能运输系统研究中心,江苏 南京 211189; 2. 新疆大学 建筑工程学院,新疆 乌鲁木齐市 830046; 3. 江西万铜环保材料有限公司,江西 九江 332100)
Author(s):
QIAN Zhen-dong1;  XU Zi-jian1;  MIN Yi-tong1;  HU Bang-yan1; 2;  CAO Zheng3
(1. Intelligent Transportation System Research Center, Southeast University, Nanjing 211189, Jiangsu, China; 2. College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830046, Xinjiang, China; 3. Jiangxi Wantong Environmental Protection Materials Co., Ltd., Jiujiang 332100, Jiangxi, China)
关键词:
道路工程;  铜尾矿;  沥青胶浆;  沥青混合料;  路用性能;  重金属浸出
Keywords:
road engineering;  copper tailings;  asphalt mastic;  asphalt mixture;  road performance;  heavy metal leaching
分类号:
U414
DOI:
10.19721/j.cnki.1671-8879.2025.03.002
文献标志码:
A
摘要:
为提高铜尾矿(CT)的固废利用率,探讨了用CT替代石灰岩矿粉(LP)作为沥青混合料填料的可行性,并评估了其对环境的潜在影响。表征了铜尾矿的物理和化学性质,根据5种替代率(0、25%、50%、75%、100%)和3种填料体积分数(25%、30%、35%)配制了沥青胶浆和沥青混合料,然后采用温度扫描试验评估了沥青胶浆的流变性能,并通过车辙试验、低温小梁弯曲试验、冻融劈裂试验和浸水马歇尔试验验证了其路用性能,还通过酸溶液重金属浸出试验评估了其环境影响。研究结果表明:与LP相比,CT具有更小的粒径和428 m2/kg的比表面积,有利于增强填料与沥青之间的附着力,但CT中更高的SiO2含量与亲水系数可能导致沥青混合料抗水损性能的下降; 随着CT替代率的增加,沥青胶浆的复数模量显著提高,特别是在75%替代率和30%体积分数的CT组合中,复数模量提高了39%～62%,且相位角减小,表明CT能够增强沥青胶浆的高温稳定性和抗变形能力; CT沥青混合料的抗车辙能力比LP沥青混合料高5%,在低温下的最大弯拉应变减少了3.0×10-4,冻融劈裂试验强度平均减少6.5%,但均能满足路用性能要求; 此外,CT中Cu、Ba等重金属析出率远小于规范要求,环境风险可忽略不计。因此,综合考虑路面性能和环境因素,CT可成为天然矿物填料的替代品。
Abstract:
To improve the solid waste utilization rate of copper tailings(CT), the feasibility of replacing the limestone powder(LP)with CT as an asphalt mixture filler was explored, and its potential environmental impacts were evaluated. The physical and chemical properties of CT were characterized. The asphalt mastics and asphalt mixtures were prepared based on five substitution rates(0, 25%, 50%, 75% and 100%)and three filler volume fractions(25%, 30% and 35%). The rheological properties of asphalt mastics were evaluated using temperature scanning tests. The road performance was verified through the rutting test, low-temperature bending beam test, freeze-thaw splitting test, and water immersion Marshall test. In addition, the environmental impact was assessed through the acid solution heavy metal leaching test. The research results show that compared to LP, CT has a smaller particle size and a specific surface area of 428 m2/kg, which is beneficial for enhancing the adhesion between the filler and the asphalt. However, the higher SiO2 content and hydrophilic coefficient in CT may decrease the water resistance of the asphalt mixture. As the substitution rate of CT increases, the complex modulus of the asphalt mastic significantly increases, especially in the 75% substitution rate and 30% volume fraction CT condition, where the complex modulus increases by 39%-62%, and the phase angle decreases. This indicates that CT can enhance the high-temperature stability and deformation resistance of the asphalt mastic. The rutting resistance of the CT asphalt mixture is 5% higher than that of the LP asphalt mixture. The maximum bending tensile strain at low temperature decreases by 3.0×10-4. The freeze-thaw splitting test strength decreases by an average of 6.5%, but all meet the road performance requirements. Additionally, the leaching rates of heavy metals such as Cu and Ba in CT are far below the specification requirements, and the environmental risk is negligible. Therefore, considering both the road performance and environmental factors, CT can be a substitute for natural mineral fillers.7 tabs, 9 figs, 30 refs.

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备注/Memo

备注/Memo:
收稿日期:2024-11-11
基金项目:国家重点研发计划项目(2018YFB1600304); 新疆维吾尔自治区自然科学基金项目(2021D01C117)
作者简介:钱振东(1969-),女,江苏南通人,教授,博士研究生导师,E-mail:qianzd@seu.edu.cn。
更新日期/Last Update: 2025-05-30