硅酸盐学报

铝率及液相性质对高硅酸三钙含量硅酸盐水泥熟料烧成过程的影响

单位：中国建筑材料科学研究院水泥基材料科学重点实验室郑州大学北京100024 郑州450052

关键词：铝率烧成过程液相性质显微结构

分类号：TQ172.6

出版年,卷(期):页码：2004,32(3):340-345

DOI：

摘要：

研究了由于铝率变化 ,导致液相性质的改变 ,及其对高硅酸三钙 (C3S)含量硅酸盐水泥熟料烧成过程和亚微观结构的影响。分析结果表明 :对于具有相同C3S含量的熟料 ,当煅烧温度高于 14 0 0℃ ,高硅高铝熟料的易烧性反而会优于低硅高铁熟料。对于高硅熟料 ,提高熟料铝率 ,液相增多 ,可促进A矿形成 ;对于低硅熟料 ,铝率增加 ,导致液相粘度增加 ,则会抑制A矿形成。当铝率 >1.68,烧成熟料中才会出现较多铝酸三钙 (C3A)结晶 ;当铝率 =1.6～ 1.8时 ,对于硅酸率 =3 .0 0的熟料 ,结晶的铁铝酸四钙 (C4 AF)数量最多 ;当铝率处于 1.0～ 1.9之间时 ,熟料中A矿晶体的尺寸随铝率增加而减小 ,同时晶体长径比明显增加 ,晶体内部包裹物数量显著增多。

The liquid properties variation caused by alumina modulus(IM) and their influence on burning process and microstructures of tricalcium silicate(C_(3)S)-rich portland clinkers were investigated. The results show that the burnability of clinkers with high silica modulus(SM) and high IM are better than that of clinkers with low SM and low IM at the same C_(3)S content and the high burning temperatures over 1 400 ℃. The increase of IM in the clinker with high SM can raise liquid phase content in the clinker and accelerate the formation of alite. However, the increase of IM in the clinker with low SM results a higher viscosity of the liquid phase during the burning, and retrain the formation of C_(3)S. The number of C_(3)A crystals in the clinker is larger when the IM value is higher than 1.68. The number of C_(4)AF crystals in the clinker with SM=3.00 is the largest when IM value lies in the range of 1.6～1.8. The sizes of alite in the clinker decrease, the ratios of length to breadth of alite increase remarkably and there are much more inclusions in the alite when the IM value of the clinker increases in the range of 1.0～1.9.

基金项目：

国家重点基础研究发展规划 (2 0 0 1CB610 70 1)资助项目

作者简介：

参考文献：

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