肖国庆 Likes:

Affiliation of Author(s):

材料科学与工程学院

Journal:

Interceram Refractories Manual

Key Words:

中文关键字：镁铝尖晶石，铝酸盐水泥，英文关键字：MA-spinel,

Abstract:

A spinel containing calcium aluminate cement (SCA) is synthesized from light-burned dolomite and industrial alumina (Al2O3) by a sintering process. The phase of the cement constituents are analyzed by X-ray diffraction (XRD). The microstructure of hydrated cement is examined by scanning electron microscopy (SEM). The effects of some additives (CaCl2, Na2SO4, Li2CO3) on the setting time mainly are investigated in order to improve its setting behaviour. The results show that cement consists of calcium monoaluminate (CaAl2O4, CA), calcium dialuminate (CaAl4O7, CA2) and spinel (MgAl2O4, MA). The main hydrated phase is C2AH8 when water is added. The setting time is shortened by additives. Among these additives, Li2CO3 is most effective. This is mainly attributed to its ability to reduce the time of the hydrate precipitation and to decrease the energy barrier necessary for the formation of calcium aluminate hydrate.

Note:

肖国庆

Co-author:

连进,石金辉,吕李华

First Author:

xiaoguoqing

Indexed by:

Journal paper

Volume:

卷：

Issue:

期：4

Page Number:

页：42-45

Translation or Not:

no

Date of Publication:

2010-10-01