摘要
研究了活化方式(机械活化、碱活化)对铜尾矿粉活性的影响,在此基础上研究了活化铜尾矿粉、低品位硅粉的掺量(0、3%、6%、9%)对混凝土工作性、力学性能和耐久性能的影响。结果表明:相较于碱活化,机械活化对铜尾矿粉活性的改善效果更好,最佳粉磨时间为40 min;随着活化铜尾矿粉掺量的增加,混凝土的工作性、抗压强度、干燥收缩性能基本降低,抗氯离子渗透性能和抗冻性能先增后降,活化铜尾矿粉的最佳掺量为6%;随着低品位硅粉掺量的增加,混凝土的工作性、60~90 d抗压强度、抗氯离子渗透性能和抗冻性能均先增后降,3~28 d抗压强度增大,干燥收缩性能降低,低品位硅粉的最佳掺量为6%。
The effect of activation method(mechanical activation,alkali activation)on the activity of copper tailings powder was investigated,and based on this,the effects of the content(0,3%,6%and 9%)of activated copper tailings powder and low grade silica fume on the workability,mechanical property,and durability of concrete were investigated.The results show that,compared with alkali activation,mechanical activation is more effective in improving the activity of copper tailings powder,and the optimal grinding time is 40 min.With the increase of the content of activated copper tailings powder,the workability,compressive strength and drying shrinkage performance of the concrete basically decrease,and the chlorine ion penetration resistance and frost resistance first increase and then decrease,and the optimum content of activated copper tailings powder is 6%.With the increase of the content of low grade silica fume,the workability,60~90 d compressive strength,chlorine ion penetration resistance and frost resistance of concrete first increase and then decrease,the 3~28 d compressive strength increases,the drying shrinkage performance decreases,and the optimum content of low grade silica fume is 6%.
作者
卢霄
李宁
史平
艾洪祥
岳彩虹
陈旭
LU Xiao;LI Ning;SHI Ping;AI Hongxiang;YUE Caihong;CHEN Xu(China West Construction Xinjiang Group Co.,Ltd.,Urumqi 830000,China;Jinan Zhangqiu District Engineering Quality and Safety Center,Jinan 250000,China)
出处
《混凝土与水泥制品》
2025年第2期91-96,共6页
China Concrete and Cement Products
关键词
铜尾矿粉
球磨
碱激发
低品位硅粉
混凝土
工作性
力学性能
耐久性能
Copper tailings powder
Ball milling
Alkali activation
Low grade silica fume
Concrete
Workability
Mechanical property
Durability
作者简介
第一作者:卢霄(1994-),男,工程师。通信地址:乌鲁木齐市水磨沟区昆仑东街505号恒昌恒晟小区,联系电话:15699176670。
