钙矾石相的研究综述  

Research review on ettringite phase

作　　者：王露[1] 刘数华[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《混凝土》2013年第8期83-86,90,共5页Concrete

基　　金：国家自然科学基金资助项目(51208391);硅酸盐建筑材料国家重点实验室开放基金资助课题(SYSJJ2012-11)

摘　　要：从钙矾石相的晶体结构的角度出发,综述了钙矾石相的形成、稳定的影响因素,以及钙矾石的膨胀机理。大量研究成果表明:大部分学者认同钙矾石相的形成符合溶解-沉淀理论;AlO2-溶出的快慢、Ca2+和Al3+浓度对钙矾石相形成速率起到关键作用;液相中SO3浓度及可以与铝酸钙生成复盐的其他矿物的加入量影响钙矾石相的稳定性;钙矾石相受热易分解并能够从无定形状态迅速恢复到原来晶体结构;钙矾石相引起膨胀的驱动力包括吸水肿胀和晶体生长推力两种说法。最后对钙矾石的利用做了简要概述,以期为科研工作在对钙矾石的研究过程中扬利除弊提供借鉴。From the view of the ettringite phase crystal structure,the influence factors of the ettringite phase formation and stability was investigated,as well as the ettringite expansion mechanism.A large number of literature show that most of scholars agree with the solution-precipitation theory of the ettringite phase formation;the speed of AlO 2-dissolution,the concentration of Ca2＋and Al3＋all play a pivotal role of the rate of ettringite formation;the concentration of SO 3 in the liquid phase and the amount of other minerals which can generate double salt with the calcium aluminate can influence the stability of ettringite;ettringite can be heated to decomposite and get back to the original crystal structure from amorphous state quickly;driving force of Ettringite causing inflation included two kinds of statements,such as water swelling and thrust of crystal growth.At last it gived a brief introduction to the use of ettringite,which could provide reference of carrying the merit and avoiding disadvantages from the scientific research on ettringite.

关 键 词：钙矾石相 早期强度 晶体结构 稳定因素 微膨胀 

分 类 号：TU528.01[建筑科学—建筑技术科学]