矽卡岩型铜尾矿蒸压制品水化过程及其强度发展  

Hydration process and strength development of autoclaved products using skarn-type copper tailings

作　　者：祝丽萍[1] 倪文[1] 陈伟[1] 黄晓燕[1] 高术杰[1] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《工程科学学报》2015年第3期359-365,共7页Chinese Journal of Engineering

基　　金：国家高技术研究发展计划资助项目(2012AA062405)

摘　　要：通过对尾矿蒸压制品试块的强度测试、X射线衍射分析和扫描电镜观察,探讨了矽卡岩型铜尾矿-矿渣-硅砂-熟料-石膏体系的试块在静停期、高温高压蒸养阶段和出高压釜后的常温养护中发生的水化反应,研究了原料中钙质组分和硅质组分掺量变化对反应生成水化产物的种类和数量以及这些水化产物对试块强度的影响.发现蒸压制品制备过程中各个阶段的强度取决于生成的水化产物种类和数量,而水化产物的种类和数量主要取决于原料中钙质组分的含量和硅质组分的含量及存在形式.Hydration reactions of samples made from skarn-type copper tailings, blast furnace slag, quartz sand, cement clinker and natural gypsum during the process of pre-curing, autoclaving and re-curing were investigated by strength testing, X-ray diffraction analysis and scanning electron microscopy. The influences of calcium and silicon contents on the amount and variety of hydration prod- ucts generated in the reactions were analyzed and the effects of hydration products on the strength of the samples were discussed. It is found that the strength of autoclaved products in different curing stages depends on the amount and variety of hydration products gener- ated in the curing process, while the amount and variety of them hinge on the amount and existence form of calcium and silicon.

关 键 词：尾矿 蒸压制品 强度 水化作用 

分 类 号：TU522.3[建筑科学—建筑技术科学]