活化金尾矿掺量对混凝土力学性能与微观结构性能的影响  

Influence of the Amount of Activated Gold Tailings on the Mechanical Properties and Microstructural Properties of Concrete

作　　者：谭琴[1] 吴文伟 张聪 Tan Qin;Wu Wenwei;Zhang Cong(School of Intelligent Construction,Luzhou Vocational and Technical College,Luzhou,Sichuan,China;School of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei,China;Department of Road and Bridge Engineering,Inner Mongolia Vocational&Technical College of Communications,Chifeng,Inner Mongolia,China)

机构地区：[1]泸州职业技术学院智能建造学院,四川泸州646100 [2]华北理工大学矿业工程学院,河北唐山063210 [3]内蒙古交通职业技术学院道理桥梁工程系,内蒙古赤峰024005

出　　处：《矿产综合利用》2023年第6期120-126,共7页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金项目(51374088)。

摘　　要：这是一篇陶瓷及复合材料领域的论文。为了研究活性金尾矿掺量对混凝土力学性能、微观结构性能和水化性能的影响,开展了不同掺量金尾矿混凝土的力学性能、XRD、TG-DTG和水化特性实验。结果表明:在粉磨时间为30 min时,金尾矿的比表面积达到了极大值以及其晶体结晶化度达到了极小值。而在金尾矿掺量为30%时,混凝土的基本力学和物理性能达到较佳状态;且掺入活性金尾矿混凝土的微观结构性能、水化放热速率和放热量均优于掺入非活性金尾矿混凝土的微观结构性能、水化放热速率和放热量。随着金尾矿粉磨时间的不断增大,金尾矿粒度累积曲线的变化规律都呈现先增大后趋于稳定的趋势,且随着粉磨时间的不断增大,金尾矿粒度累积越来越大。This is an essay in the field of ceramics and composites.In order to study the effect of activated gold tailings content on the mechanical properties,microstructural properties and hydration properties of concrete,the mechanical properties,XRD,TG-DTG and hydration characteristics tests of different content of gold tailings concrete were carried out.The results showed that when the grinding time was 30 min,the specific surface area of the gold tailings reached the maximum and the crystallinity reached the minimum.When the content of gold tailings was 30%,the basic mechanical and physical properties of concrete reached the best state.In addition,the microstructure performance,hydration heat release rate and heat release of concrete mixed with active gold tailings are better than those of concrete mixed with inactive gold tailings.With the continuous increase of the grinding time of gold tailings,Changing law of the cumulative curve of gold tailings particle size showed a trend of first increasing and then becoming stable.And with the continuous increase of grinding time,the accumulation of gold tailings particle size was getting larger and larger.

关 键 词：陶瓷及复合材料 金尾矿 机械粉磨 活性 水化放热速率 水化放热量 微观结构性能 

分 类 号：TD989[矿业工程—选矿] TU421[建筑科学—岩土工程]