固化剂改良铁尾矿无侧限抗压强度试验研究  

Experimental Research on the Unconfined Compressive Strength of Iron Tailings Improved by Curing Agent

作　　者：赵飞[1] 李桂英 张会芳[1] 张冲冲 杨烁 白启敬 ZHAO Fei;LI Gui-ying;ZHANG Hui-fang;ZHANG Chong-chong;YANG Shuo;BAI Qi-jing(Hebei Institute of Architecture and Civil Engineering,Zhangjiakou,HeBei 075000;Zhangjiakou Product Quality Supervision Office,Zhangjiakou,Hebei 075000)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]张家口市产品质量监督所,河北张家口075000

出　　处：《河北建筑工程学院学报》2021年第1期50-53,共4页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北省高等学校科学技术研究项目(Z2020116);2020年市级科技计划自筹经费项目(20201009B);张家口市科技计划财政资助项目(1911024D-3)。

摘　　要：铁尾矿是开采铁矿石选矿后的产物,它是一种固体工业废弃物。其产量极大,后期存放占用大量土地资源,而且会对周围环境造成各种不利影响。主要以抗压强度为出发点研究固化剂改良铁尾矿后的路用性质。通过检测其无侧限抗压强度获得数据并分析可以得出以下结论:随着固化剂掺量的增加,土凝岩和水泥改良铁尾矿试件无侧限抗压强度的差异逐渐缩小。从经济的角度考虑,土凝岩改良铁尾矿试件优于水泥改良试件。压实度为93%时,随着龄期的增长各种固化剂掺量改良铁尾矿试件无侧限抗压强度值曲线均呈上升态势,水泥改良铁尾矿试件的强度总体上优于土凝岩改良的试件强度,且都符合标准要求。Iron tailing is the product of iron ore mining and beneficiation.It is a kind of solid industrial waste.Its output is huge,and the later storage takes up a lot of land resources,and will cause various adverse effects on the surrounding environment.In this paper,based on the compressive strength,the road properties of iron tailings improved by curing agent are studied.By testing the unconfined compressive strength,the data can be obtained and analyzed,and the following conclusions can be drawn.With the increase of the amount of curing agent,the difference of unconfined compressive strength between the test pieces of cementitious rock and cement improved iron tailings is gradually narrowing.From the economic point of view,the iron tailing sample improved by concrete is better than that of cement.When the compactness is 93%,the curves of unconfined compressive strength of the improved iron tailings with different amount of curing agent increase with the increase of age.The strength of the cement improved iron tailings is better than that of the cement improved iron tailings,and all meet the requirements of the standard.

关 键 词：铁尾矿 无侧限抗压强度 压实度 土凝岩 

分 类 号：TU5[建筑科学—建筑技术科学]