铁尾矿粉对石灰石粉混凝土力学性能和氢氧化钙含量的影响  

Effect of Iron Tailings Powder on the Mechanical Properties and Calcium Hydroxide Content in Limestone Powder Concrete

作　　者：张巨璟[1] 花东申 ZHANG Jujing;HUA Dongshen(Shaanxi Vocational and Technical College,Xi’an 710038,Shaanxi,China;School of Mining Engineering,North China University of Science and Technology,Tangshan 063210,Hebei,China)

机构地区：[1]陕西职业技术学院,陕西西安710038 [2]华北理工大学矿业工程学院,河北唐山063210

出　　处：《矿产综合利用》2024年第5期176-183,203,共9页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金项目(51974134)。

摘　　要：这是一篇陶瓷及复合材料领域的论文。本文研究了复掺铁尾矿粉和石灰石粉的掺量和比例对混凝土性能的影响。结果表明:随着复掺矿粉比例的不断增大,复掺矿粉混凝土强度均呈现出先增大后减小的变化规律,并在复掺矿粉比例为1∶2时取得较大值。在同一冻融循环次数作用下,混凝土质量损失率随着复掺矿粉比例的增大呈现出先减小后增大的趋势,而混凝土的相对动弹性模量却呈现出先增大后减小的变化趋势。在同一测定位置处,随着复掺矿粉比例的不断增大,复掺矿粉混凝土氯离子含量均呈现出不断减小,且在比例为1∶2时复掺矿粉混凝土氯离子含量的下降变快。综合实验结果得到,石灰石粉掺量为20%时混凝土的强度特性较佳,复掺矿粉比例为1∶2时混凝土的强度和耐久性均达到较佳。This is an article in the field of ceramics and composites.Influence of the mixed mineral powder content and proportion on the performance of concrete were studied.The results show that with the continuous increase of the proportion of mixed slag powder,the strength of the mixed slag powder concrete shows a change rule that first increases and then decreases.And the maximum value is achieved when the ratio of compound ore powder is 1∶2.Under the effect of the same number of freeze-thaw cycles,the mass loss rate of concrete shows a trend of first decreasing and then increasing with the increase of the proportion of mixed mineral powder.However the relative dynamic elastic modulus of concrete shows a trend of first increasing and then decreasing.At the same measuring position,as the proportion of compound slag powder increases,the chloride ion content in the compound slag powder concrete shows a continuous decrease.And when the ratio is 1∶2,the chloride ion content of the mixed slag powder concrete decreases faster.The comprehensive test results show that the strength characteristics of limestone tailings concrete are the best when the content of limestone tailings is 20%.The strength and durability of concrete reach the best when the ratio of mixed mineral powder is 1∶2.

关 键 词：陶瓷及复合材料 铁尾矿粉 石灰石粉 质量损失率 相对动弹性模量 氯离子含量 强度 

分 类 号：TD981[矿业工程—选矿]