基于响应面法的复合充填料浆配比优化及微观结构影响机制  

Optimization of mixture ratio and microstructure influence mechanism of composite filling slurry based on response surface method

作　　者：刘树龙 王发刚[1] 李公成 刘国磊[2] 王劼[2] 齐兆军 LIU Shulong;WANG Fagang;LI Gongcheng;LIU Guolei;WANG Jie;QI Zhaojun(11School of Materials Science and Engineering,Shandong University of Technology,Zibo 255049,China;College of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255049,China;Shandong Gold Mining Technology CO.LTD.,Filling Engineering Laboratory Branch,Laizhou 261400,China)

机构地区：[1]山东理工大学材料科学与工程学院,淄博255049 [2]山东理工大学资源与环境工程学院,淄博255049 [3]山东黄金矿业科技有限公司充填工程实验室分公司,莱州261400

出　　处：《复合材料学报》2021年第8期2724-2736,共13页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金青年项目(51904178);国家重点研发计划政府间国际科技创新合作重点专项“地下金属矿规模化绿色开采关键技术合作研究”(2018YFE0123000);山东省自然科学基金博士基金(ZR2018BEE009)。

摘　　要：为探明因素间交互作用对充填体强度性能的影响机制及揭示胶凝材料水化产物作用机制,以水泥、石灰、石膏添加量为自变量影响因子,胶结体抗压强度为响应目标值,采用Box-Behnken响应面法(RSM)设计试验,建立二次多项式回归模型,结合Numencial功能优化模型自变量参数。最后,利用XRD、SEM、EDS分析手段,探讨净浆试样水化产物组成及微观结构形貌。研究结果表明∶方差分析及模型响应曲面共同诠释了水泥和石灰添加量的交互作用是影响充填体强度性能的关键性因素。对复合充填料浆配合比寻优可得,在水泥∶石灰∶石膏∶矿渣∶甲酸钙=30∶15∶1∶50∶4最优条件下,胶结体3天和7天抗压强度为1.19 MPa和2.17 MPa,模型验证试验相对误差为3.25%和0.93%,表明模型精确度高,可靠性强。复合胶凝体系水化产物主要为钙矾石(AFt)和C-S-H凝胶,随着龄期的延长,AFt和C-S-H凝胶交错生长,紧密搭接,形成致密的三维空间网络结构支撑体系,是胶结充填体具备强度性能的主要来源。To explore how the interaction among factors influences the strength of filling body,and reveal the action mechanism of hydration products from cement materials,a test was designed by Box-Behnken response surface methodology(RSM) for establishing a quadratic polynomial regression model in combination with independent variable parameters of numencial function optimization model. In the design,the added quantities of cement,lime and gypsum were taken as independent variable influence factors,and the compressive strength of cement body as the response target values. Finally,XRD,SEM and EDS analysis methods were utilized to discuss the composition and microstructure morphology of the hydration products from paste samples. The results show that the ANOVA and the response surface of the model jointly explain that the interaction between cement and lime quantities added is the critical factor influencing the strength of filling body. After optimizing the mixture ratio of the composite filling slurry,when the ratio of cement∶lime∶gypsum∶slag∶calcium formate is optimal as 30∶15∶1∶50∶4,the 3 days and 7 days compressive strength values of the cement body are 1.19 MPa and 2.17 MPa,respectively. The relative errors of the model validation tests are 3.25% and 0.93%,which indicates that the model is precise and reliable. The main hydration products of the composite cementitious system are AFt and C-S-H gels,which stagger and overlap closely with age,thus forming a dense 3D spatial network structure support system as the main source of strength for the cemented filling body.

关 键 词：响应面法 交互作用 回归模型 抗压强度 最优配比 微观结构 

分 类 号：TD853[矿业工程—金属矿开采]