摘要
为解决天然砂石量逐渐降低、固体废弃物日益增加的难题,以铜尾矿为研究对象,用铜尾矿材料替代地聚物混凝土中天然骨料,对铜尾矿地聚物混凝土展开研究。采用坍落度试验,研究铜尾矿地聚物混凝土和易性;通过立方体抗压强度试验确定最优配合比,通过劈裂抗拉与抗折试验,印证最优配合比的抗拉、抗折性能;通过微观分析得出,不同碱激发剂模数是造成混凝土强度产生差异的原因。试验研究表明,铜尾矿材料替代地聚物混凝土中的天然骨料具有可行性,立方体抗压强度最高可达70.6MPa、劈裂抗拉强度可达7.0MPa、抗折强度达4.6MPa。铜尾矿地聚物混凝土性能的影响因素排序为:碱激发剂模数>细骨料>粗骨料。
In order to solve the problem that the amount of natural sand and gravel is gradually decreasing and the amount of solid waste is increasing.Taking copper tailings as the research object,the natural aggregate in geopolymer concrete was replaced by copper tailings,and the copper tailings geopolymer concrete was studied.The workability of copper tailings geopolymer concrete was studied by slump test.The cube compressive strength test is used as the index for selecting the optimal mix proportion.The tensile and flexural properties of the optimum mix proportion were verified by splitting tensile and flexural tests.Through microscopic analysis,it is concluded that different alkali activator modulus is the reason for the difference of concrete strength.The test results show that it is feasible for copper tailings to replace natural aggregate in geopolymer concrete.The cube compressive strength can reach 70.6 MPa,the splitting tensile strength can reach 7.0 MPa,and the flexural strength can reach 4.6 MPa.The order of influencing factors on the performance of copper tailings geopolymer concrete is alkali activator modulus>fine aggregate>coarse aggregate.
作者
王德法
朱梦雲
雒亿平
刘镇瑜
丁磊
WANG Defa;ZHU Mengyun;LUO Yiping;LIU Zhenyu;DING Lei(School of Civil Engineering and Architecture,Xi’an University Technology,Xi’an,Shaanxi 710048,China;School of Water Resources and Hydropower,Xi’an University of Technology,Xi’an,Shaanxi 710048,China)
出处
《施工技术（中英文）》
CAS
2022年第14期105-109,119,共6页
Construction Technology
基金
榆林市2020年科技计划项目(CXY-2020-081,CXY-2020-080)。
关键词
铜尾矿地聚物混凝土
配合比
抗压强度
抗拉强度
抗折强度
微观扫描
copper tailings geopolymer concrete
mix proportion
compressive strength
tensile strength
flexural strength
scanning electron microscope(SEM)
