氧化镁对高镁熟料膨胀性能的影响  

Effect of Magnesia on Expansion of High Magnesium Clinker

作　　者：胡亚茹[1] 王倩 肖建敏[1] 宋强[1] HU Ya-ru;WANG Qian;XIAO Jian-min;SONG Qiang(College of Materials and Mineral Resources,Xi’an University of Architecture and Technology, Xi’an 710055,China)

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《硅酸盐通报》2018年第9期2754-2758,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家重点研发计划(2017YFB0309903-03);陕西省重点研发计划(2017GY-142;2017GY-176);陕西省自然科学基金(2017JM5097)

摘　　要：借助XRD,SEM,TGA等检测方法探讨了内含MgO的高镁熟料在20℃,50℃和80℃水浴养护条件下的膨胀性能及其水化过程。结果显示:高镁熟料的体积膨胀约为低镁熟料的3倍;养护至60 d,80℃和50℃条件下养护的水泥试块的体积膨胀约为20℃的6.3倍和4.8倍。80℃水浴养护120 d的高镁水泥中形成CaMg(CO_3)_2。高镁熟料在80℃条件下养护至7 d,距离未水化的方镁石5μm左右的区域存在水化硅酸钙镁(C(M)-S-H)。Mg2+生成的M-A-H相Mg∶Al摩尔比约为2。The expansion and hydration process of high magnesium clinker cured at 20℃,50℃and 80℃water were discussed by means of XRD,SEM,TGA and other methods.The results show that the volume expansion of high magnesia clinker is about more than 3 times of low magnesia clinker.The volume expansion of cement cured at 80℃and 50℃are about 6.3 times and 4.8 times of 20℃at 60 d,respectively.CaMg(CO 3)2 is formed in the pastes cured at 80℃water for 120 d.The calcium and magnesium silicates hydrates is found at about 5μm from unhydrated periclase at 80℃for 7 d.M-A-H with an atomic Mg/Al ratio of 2 is formed.

关 键 词：高镁熟料 方镁石 水化产物 

分 类 号：TQ172.4[化学工程—水泥工业]