铅锌冶炼废渣对水泥胶砂强度及孔结构的影响研究  

Study on the influence of lead and zinc smelting waste slag on the strength and pore structure of cement mortar

作　　者：王生辉 刘荣进[1,2,3,4] 陈平[1,2,3,4] 韦家崭[1,2,3,4] 赵艳荣[1,2,3,4] WANG Shenghui;LIU Rongjin;CHEN Ping;WEI Jiazhan;ZHAO Yanrong(School of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Zhuang Autonomous Region Beibu Gulf Green Marine Materials Engineering Research Center,Guilin University of Technology,Guilin 541004,China;Guangxi Industrial Waste Residue Building Materials Resource Utilization Engineering Technology Research Center,Guilin University of Technology,Guilin 541004,China;Key Laboratory of Nonferrous Metals and New Materials Processing Technology Guilin,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学材料科学与工程学院,广西桂林541004 [2]桂林理工大学广西壮族自治区北部湾绿色海工材料工程研究中心,广西桂林541004 [3]桂林理工大学广西工业废渣建材资源利用工程技术研究中心,广西桂林541004 [4]桂林理工大学有色金属及材料加工新技术重点实验室,广西桂林541004

出　　处：《混凝土》2021年第4期78-81,86,共5页Concrete

基　　金：广西创新驱动发展专项(AA17204066-3,AA18242007-3);国家自然科学基金(21566008);广西重点研发计划(桂科AB17129014,2017AB53025)。

摘　　要：使用铅锌冶炼废渣作为混合材,研究了不同掺入比对胶砂试块流动度及各龄期强度的影响。通过压汞试验,结合扫描电镜分析了掺入铅锌冶炼废渣对胶砂内部孔隙率及孔径分布的影响及微观形貌。试验结果表明:随着铅锌冶炼废渣掺量的增加,胶砂试块各龄期强度逐渐下降,但在掺量为30%时,胶砂28 d抗压强度为46.8 MPa,与对照组基本持平,掺量不超过30%时,28 d抗压强度超过了对照组,压汞试验表明掺入铅锌冶炼废渣可以减小水泥浆体最可几孔径大小和孔隙率,使胶砂整体结构更加密实。扫描电镜结果表明铅锌冶炼废渣水化产物形成相互搭接的空间网络结构,填充了水泥浆体的孔隙。The influence of different ratio of lead and zinc smelting waste slag on flowability and strength of mortar was studied.The influence of lead and zinc smelting waste slag on the porosity and pore size distribution of the mortar was analyzed by mercury injection test and SEM.The results show that with the increase of the content of lead and zinc smelting waste slag,the strength of the mortar samples decreases gradually,but when the content of lead and zinc smelting waste slag is 30%,the compressive strength of the mortar is 46.8 MPa for 28 days,which is basically the same as that of the control group,when the content of the mortar is not more than 30%,28 d compressive strength is higher than that of the Control Group.Mercury injection test shows that mixing lead and zinc smelting waste can reduce the most probable pore size and porosity of cement paste,and make the whole structure of cement mortar more compact.The results of SEM showed that the hydration products of lead-zinc smelter slag formed a space network structure which overlapped each other and filled the pores of cement paste.

关 键 词：铅锌冶炼废渣 胶砂强度 孔隙率 孔径分布 

分 类 号：TU528.041[建筑科学—建筑技术科学]