赤泥水泥水化过程放射性变化规律研究  

Change Regulation of Red Mud Cement Radioactive during Cement Hydration

作　　者：田崇霏 罗忠涛[1] 王晓[1] 殷会玲[1] 杨久俊[1,3] 

机构地区：[1]郑州大学材料科学与工程学院,郑州450052 [2]郑州筑邦建材有限公司,郑州450062 [3]天津城建大学材料科学与工程学院,天津300384

出　　处：《硅酸盐通报》2015年第9期2579-2584,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51172155)

摘　　要：以脱碱拜耳法赤泥、熟料和石膏为原料进行赤泥水泥的制备,得出脱碱赤泥的合适掺量为15%。研究了赤泥水泥水化过程中赤泥掺量和水化龄期对232Th、226Ra、40K放射性比活度的影响。结果表明:赤泥水泥水化后相较于水化前,232Th、226Ra和40K的放射性比活度均出现了下降;水化28 d龄期,随着赤泥掺量的增加,赤泥水泥232Th、226Ra、40K的放射性比活度均有所增加;同赤泥掺量条件下,226Ra的放射性比活度随着水化龄期的延长而增加,232Th的放射性比活度随着水化龄期的延长基本保持不变,40K的放射性比活度随着水化龄期的延长一直减小。This paper prepared a type of red mud cement using dealkalization bayer red mud, clinker and gypsum as raw materials, drew a conclusion that the optimum mixing amount of the dealkalization bayer red mud is 15%. Influence of changing red mud content and cement hydration ages on its radioactive specific activity of ^232Th, ^226Ra, ^40K was studied during the hydrating of the red mud cement. Results show that the radioactive specific activity of ^232Th, ^226Ra and ^40K is decreased after the red mud cement hydrated. When cement hydration ages is 28 d, the radioactivity specific activity of ^232Th, ^226Ra, ^40K is increasing along with the increase of red mud content. The influence of changing cement hydration ages on its radioactivity specific activity of ^226Ra, ^232Th, ^40K is that ^226Ra inerease,^40K decrease while ^232Th remain about the same.

关 键 词：赤泥水泥 赤泥掺量 水化龄期 放射性比活度 

分 类 号：TD98[矿业工程—选矿]