SEM examination of clinkers containing foreign elements

被引:57
作者
Kolovos, K [1 ]
Tsivilis, S [1 ]
Kakali, G [1 ]
机构
[1] Natl Tech Univ Athens, Dept Chem Engn, Inorgan & Analyt Chem Lab, GR-15773 Athens, Greece
关键词
clinker; mineralizers; crystal structure; SEM;
D O I
10.1016/j.cemconcomp.2004.02.003
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In this paper, the structure of clinker, modified by the introduction of foreign elements in the raw mix, is examined. One reference mixture and 16 modified mixtures, prepared by mixing the reference sample with 2.5% w/w of chemical grade CuO, MnO3, WO3, ZnO, Nb2O5, Ta2O5, MnO2, V2O5, Li2O, Co2O3, NiO, SnO2, SrO, CrO3, TiO2 and BaO2 were studied. The samples, after sintering at 1450 degreesC, were examined using a scanning electron microscope. As it is concluded the incorporation of foreign elements in clinker considerably affects the texture of the silicates and the interstitial material. Nb, Mo, Ta, Ti, Co, Ni and Mn are preferentially incorporated in the melt. Cr and Sr are found mainly in the silicates while W and V seem to be equally distributed into the clinker compounds. Cu, Ni and Sn are mainly incorporated in solid solutions combining with CaO, Li and Sr modify considerably the texture of alite and belite indicating a strong effect on the growth of the calcium silicate crystals. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:163 / 170
页数:8
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