不同应变率下铅锌尾矿砂混凝土单轴受压力学性能研究  

Study on uniaxial compressive mechanical properties of concrete with lead-zinc tailings sand subjected to different strain rate

作　　者：杨博 甘元初 金丹 YANG Bo;GAN Yuanchu;JIN Dan(School of civil Engineering,University of South China,Hengyang 421001,China)

机构地区：[1]南华大学土木工程学院,湖南衡阳421001

出　　处：《混凝土与水泥制品》2025年第2期82-86,共5页China Concrete and Cement Products

摘　　要：研究了应变率(1×10^(-5)、1×10^(-4)、1×10^(-3)、2×10^(-3 )s^(-1))、铅锌尾矿砂掺量(0、10%、20%、30%、40%、50%)对混凝土抗压强度、峰值应变和泊松比的影响。结果表明:随着铅锌尾矿砂掺量的增加,混凝土试件抗压强度先增后降;当铅锌尾矿砂掺量一定时,随着应变率的增大,混凝土的轴心抗压强度平均值增大,峰值应变平均值减小,泊松比变化较小;当应变率一定时,随着铅锌尾矿砂掺量的增加,混凝土的轴心抗压强度平均值先增后降,峰值应变平均值降低,泊松比变化较小;不同铅锌尾矿砂掺量混凝土的抗压强度增量系数和峰值应变增量系数与动态、准静态应变率比值的对数均呈线性相关关系,且相关性较好。The effects of strain rate(1×10^(-5),1×10^(-4),1×10^(-3),2×10^(-3) s^(-1)),and the content(0,10%,20%,30%,40%,50%)of lead-zinc tailings sand on the compressive strength,peak strain and poisson’s ratio of concrete were investigated.The results show that,with the increase of the content of lead-zinc tailings sand,the compressive strength of concrete specimen first increases and then decreases.When the content of lead-zinc tailings sand is constant,with the increase of strain rate,the average value of axial compressive strength of concrete increases,the average value of peak strain decreases,and the poisson’s ratio varies slightly.When the strain rate is constant,with the increase of the content of lead-zinc tailings sand,the average value of axial compressive strength of concrete first increases and then decreases,the average value of peak strain decreases,and the poisson’s ratio varies slightly.The incremental coefficient of compressive strength and the peak strain of concrete with different content of lead-zinc tailings sand are linearly correlated with the logarithms of the ratio of dynamic and quasi-static strain rates,and the correlations are favorable.

关 键 词：铅锌尾矿砂 混凝土 单轴受压 应变率 峰值应变 泊松比 

分 类 号：TU528.0[建筑科学—建筑技术科学]