Statistical research on phase formation and modification of alite polymorphs in cement clinker with SO3 and MgO

被引:32
|
作者
Li, Xuerun [1 ]
Huang, Hong [1 ,2 ]
Xu, Jie [1 ]
Ma, Suhua [1 ]
Shen, Xiaodong [1 ]
机构
[1] Nanjing Univ Technol, Coll Mat Sci & Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China
[2] Lafarge A&C Tech Serv Beijing Co Ltd, Beijing 100027, Peoples R China
关键词
Design of experiments; Formation of alite; Interaction; Alite polymorphism; Cement clinker; RESPONSE-SURFACE METHODOLOGY; PORTLAND-CEMENT; TRICALCIUM SILICATE; DESIGN; CONCRETE; CHEMISTRY; IDENTIFICATION; FORMULATION; HYDRATION; STRENGTH;
D O I
10.1016/j.conbuildmat.2012.07.099
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The design of experiments (DoE) was adjusted in cement clinker chemistry, with alite polymorphisms in the clinker taken into account. The additions of SO3, MgO, as well as two other factors, sintering temperature and time, were included to study clinker formation and alite polymorphisms. XRD quantitative analyses and thermal analysis (DSC-TG) were used to collect quantitative data from the samples and to investigate the clinkerization of the raw meal. The central composition design was used to design the experiments and the response surface methodology was used to evaluate the results. The addition of SO3 inhibited the formation of alite in the clinker, while MgO compensated for any negative effects caused by the SO3. A contour plot interpreted the combination effects of these four factors. The amount of C(4)AF Was then increased with a likewise increasing SO3 content. MgO favored the formation of M3 type alites, while SO3 stabilized the M1. Alite modification, which is related to hydration properties, could be helpful for efficient use of high MgO content calcite in cement production. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:548 / 555
页数:8
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