超细矿粉与普通矿粉对高性能混凝土性能的影响  

Effects of ultrafine mineral powder and ordinary mineral powder on performance of high performance concrete

作　　者：刘琴梅 蒋小群 李新华 陈宗辉[1] LIU Qinmei;JIANG Xiaoqun;LI Xinhua;CHEN Zonghui(China Railway Bridge Bureau Group Sixth Engineering Co.,Ltd.,Wuhan 430100,China)

机构地区：[1]中铁大桥局集团第六工程有限公司,湖北武汉430100

出　　处：《混凝土与水泥制品》2025年第1期96-99,105,共5页China Concrete and Cement Products

摘　　要：研究了普通矿粉和超细矿粉的掺量(0、10%、20%、30%、40%、50%)对高性能混凝土(HPC)坍落度、扩展度、抗压强度、抗折强度、抗冻性能、抗氯离子渗透性能、早期抗裂性能的影响。结果表明:随着普通矿粉掺量的增加,HPC的坍落度先增后降再增,扩展度基本增大;随着超细矿粉掺量的增加,HPC的坍落度先降后增再降,扩展度先增后降;掺超细矿粉HPC的工作性基本低于掺普通矿粉HPC的工作性;普通矿粉、超细矿粉的掺入均提高了HPC试件的28 d抗压强度,且随着掺量的增加,HPC试件的28 d抗压强度基本呈先增后降的趋势;在20%、30%掺量下,普通矿粉和超细矿粉的掺入均提高了HPC试件的28 d抗折强度、抗冻性能、抗氯离子渗透性能和早期抗裂性能;总体而言,适量超细矿粉对HPC性能的改善效果优于普通矿粉。The effects of the content(0,10%,20%,30%,40%,50%)of ordinary mineral powder and ultrafine mineral powder on the slump,slump-flow,compressive strength,flexural strength,frost resistance,chloride ion penetration resistance,and early cracking resistance of high performance concrete(HPC)were investigated.The results show that,with the increase of the content of ordinary mineral powder,the slump of HPC first increases,then decreases,and further increases,the slump-flow basically increases.With the increase of the content of ultrafine mineral powder,the slump of HPC first increases,then decreases,and further increases,the slump-flow first increases and then decreases.The workability of HPC with ultrafine mineral powder is basically lower than that of HPC with ordinary mineral powder.The incorporation of ordinary mineral powder and ultrafine mineral powder both improve the 28 d compressive strength of HPC specimens,and with the increase of the content,the 28 d compressive strength of HPC specimens basically shows the trend of first increasing and then decreasing.When the content is 20%or 30%,the incorporation of ordinary mineral powder and ultrafine mineral powder both improve the 28 d flexural strength,frost resistance,chlorine ion penetration resistance and early cracking resistance of HPC specimens.In general,the improvement effect of appropriate content of ultrafine mineral powder on the performance of HPC is better than that of ordinary mineral powder.

关 键 词：普通矿粉 超细矿粉 高性能混凝土(HPC) 工作性 力学性能 耐久性能 

分 类 号：TU528.0[建筑科学—建筑技术科学]