用液相电导法研究氧化镁的水化活性  

Hydration Activity of MgO Through Liquid Conductivity

作　　者：卢小琳[1] 高培伟[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《南京航空航天大学学报》2008年第3期404-406,共3页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(60672166)资助项目

摘　　要：为了了解MgO在大体积混凝土中的补偿效果,采用液相电导法研究了MgO的水化活性,结果表明:氧化镁水化活性与煅烧温度、粒径大小和养护温度有关。煅烧温度升高,MgO的晶格畸变逐渐变小,电导率下降,活性减少;颗粒尺寸减少,MgO与水接触面积增大,电导率增长,反应活性加快;养护温度升高,电导率增加,反应活性大幅度增加。The hydration activity of MgO is investigated through measuring the liquid conductivity. The results show that MgO hydration activity is related with calcination temperatures, particle size and curing temperature. MgO hydration activity is repressed due to reduced crystal lattice and conductivity if the calcination temperature is higher. Therefore, the increase on curing temperature and specific surface area speeds the hydration of MgO and formation of Mg（OH）2 crystal, thus increasing the liquid conduc-tivity and hydration activity of MgO.

关 键 词：MGO 水化 电导率 烧成 养护 

分 类 号：TQ172[化学工程—水泥工业]