摘要
为了确定高炉矿渣对砂浆初始剪切力τ_(0)和黏度系数η的影响,提出高炉矿渣对砂浆流变参数影响的试验研究。通过采用一种新型测试装置-L形管,测定新拌砂浆中浆体流动速度随矿渣掺量的变化规律。结合混凝土流变学及流体力学理论进行数值分析,得出砂浆流变参数τ_(0)和η的计算方法。通过计算对比分析得出矿渣掺量对砂浆流变参数的影响。结果表明:少量的矿渣掺入可以改善砂浆流变性能;玻璃管径与形状一定时,砂浆的流变参数τ_(0)和η回归曲线随矿粉掺量呈线性增加;在高炉矿渣的掺量在10%时砂浆的流变性能达到最佳。
In order to determine the influence of blast furnace slag on the initial shear forceτ_(0) and viscosity coefficientηof mortar,an experimental study on the influence of blast furnace slag on rheological parameters of mortar was put forward.A new type of testing device,L-shaped tube,was used to measure the variation of slurry flow rate with slag content in fresh mortar.Combined with the theory of concrete rheology and fluid mechanics,numerical analysis was carried out,and the calculation method of rheological parametersτ_(0) andηof mortar in L-shaped pipe was obtained.Through calculation and comparative analysis,the influence of slag content on rheological parameters of mortar was obtained.The results show that a small amount of slag can improve the rheological properties of mortar.When the diameter and shape of glass are constant,the regression curves of rheological parametersτ_(0) andηof mortar increase linearly with the content of mineral powder.When the content of blast furnace slag is 10%,the rheological property of mortar is the best.
作者
邢晓飞
苏彩丽
XING Xiao-fei;SU Cai-li(School of Civil Engineering,Kaifeng University,Kaifeng 475004,China;Kaifeng Key Laboratory of Construction Solid Waste Recycling Technology,Kaifeng 475004,China;Kaifeng Sponge City Engineering Materials Technology Research Center,Kaifeng 475004,China;Kaifeng Solid Waste Resource and Harmless Engineering Technology Research Center,Kaifeng 475004,China)
出处
《科学技术与工程》
北大核心
2023年第19期8377-8383,共7页
Science Technology and Engineering
基金
河南省高等学校重点科研项目(21B560009)
开封市科技发展计划科技攻关(工业)项目(2001024,2101016)
开封大学科研平台横向基金(KFDX201801)。
关键词
高炉矿渣
砂浆
L形管
掺量
流变参数
机理
blast furnace slag
mortar
L-shaped tube
dosage
rheological parameters
mechanism
