CAJ | 학술논문

从资源再生、生态环境保护和循环经济的角度出发，以重新级配后的密云地区铁矿废石为粗骨料、密云地区铁尾矿为细骨料，将铁尾矿与矿渣、水泥熟料、脱硫石膏通过梯级混磨得到混合料，与单独磨细的钢渣粉混合为胶凝材料，加入减水剂和水后制备成高强混凝土材料，并采用X射线衍射( XRD)、扫描电子显微镜( SEM)、能谱分析( EDS)等手段进行微观结构与物相组成的变化研究，进而分析反应机理。所制备的混凝土的固废总比例达到91%，使用废石代替天然石子，铁尾矿代替天然砂子，其天然砂石替代率达到100%，制得的混凝土试块28 d抗压强度达到75．92 MPa。
종자원재생、생태배경보호화순배경제적각도출발，이중신급배후적밀운지구철광폐석위조골료、밀운지구철미광위세골료，장철미광여광사、수니숙료、탈류석고통과제급혼마득도혼합료，여단독마세적강사분혼합위효응재료，가입감수제화수후제비성고강혼응토재료，병채용X사선연사( XRD)、소묘전자현미경( SEM)、능보분석( EDS)등수단진행미관결구여물상조성적변화연구，진이분석반응궤리。소제비적혼응토적고폐총비례체도91%，사용폐석대체천연석자，철미광대체천연사자，기천연사석체대솔체도100%，제득적혼응토시괴28 d항압강도체도75．92 MPa。
From viewpoints of resources regeneration,environmental protection and circular economy,the re-graded waste rocks in Miyun area were prepared as coarse aggregate,and iron tailings were prepared as fine aggregate. Then,iron tailings, blast furnace slag,cement clinker and FGD gypsum were mixed and ground to produce the mixture. Steel slag that was ground alone are together with the mixture to prepare cementitious materials. The high-strength concrete materials were produced with the cementitious materials and aggregates,by adding water-reducing agent and water. The changes of microstructure and phase composition of the high-strength concrete were studied by XRD,SEM,EDS,et al. Based on this,its reaction mechanism is ana-lyzed. The produced concrete materials obtained the compressive strength as high as 75. 92 MPa at 28 d and the content of wastes in products reached 91%. The replacement ratio of natural sands and rocks was 100% while natural sands were re-placed by Miyun iron tailings and natural rocks were replaced by Miyun waste rocks.