Research review on ettringite phase

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.