硅锰渣对泡沫混凝土孔结构及其性能的影响  

Effect of Silica-manganese Slag on the Pore Structure and Performance of Foamed Concrete

作　　者：雷洛 吴艳萍 王海滨[4] 蒋俊 刘铁 吕淑珍[2] 卢忠远 LEI Luo;WU Yan-ping;WANG Hai-bin;JIANG Jun;LIU Tie;LV Shu-zhen;LU Zhong-yuan(State Key Laboratory of Environmentally Friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China;School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China;Ningbo Construction Engineering Group,Ningbo 315040,China;Mianyang Normal College,Mianyang 621006,China)

机构地区：[1]西南科技大学环境友好能源材料国家重点实验室,绵阳621010 [2]西南科技大学材料科学与工程学院,绵阳621010 [3]宁波建工工程集团有限公司,宁波315040 [4]绵阳师范学院,绵阳621006

出　　处：《武汉理工大学学报》2022年第9期13-19,共7页Journal of Wuhan University of Technology

基　　金：四川省科技计划项目(2019ZDZX0024);西南科技大学博士基金(20zx7102)

摘　　要：以硅锰渣为辅助性胶凝材料,取代普通硅酸盐水泥,制备了硅锰渣泡沫混凝土,通过流变仪、工业显微镜、X射线衍射、热重分析、扫描电镜等手段,研究了硅锰渣掺量对泡沫混凝土微细观结构及性能的影响。结果表明:随着硅锰渣掺量的增多,净浆剪切应力先增加后减小,塑性粘度有不同程度的下降;气孔孔径先减小后增加,90d抗压强度最大值在20%硅锰渣时取得,此时干密度为504kg/m^(3),抗压强度高达4.7MPa,28d导热系数为0.1188W/(m·K)。By replacing cement with silica-manganese slag used as supplementary cementing material,silica-manganese slag foamed concrete was prepared,and the effects of silica-manganese slag on the microstructure,mesostructure and properties of foamed concrete were studied by using rheometer,industrial microscope,X-ray diffraction,derivative thermogravimetry and scanning electron microscope.The results show that the shear stress increases first and then decreases with the increase of silica-manganese slag,and the plastic viscosity decreases to different degrees.The air-void size decreases first and then increases,and the maximum value of 90-day compressive strength is obtained at 20%silica-manganese slag content,when the dry density is 504kg/m^(3)and the compressive strength is high to 4.7MPa,and the 28-day thermal conductivity is 0.1188W/(m·K).

关 键 词：硅锰渣 气孔结构 微观结构 性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]