高强高模聚乙烯纤维对大掺量矿物掺合料高强混凝土抗冻性的影响  

Effect of High Elasticity Module Polyethylene Fiber on Freeze-Thaw Durability of High Strength Concrete with High Volume Mineral Admixtures

作　　者：余红发[1] 孙伟[2] 张云升[2] Yu Hongfa;Sun Wei;Zhang Yunsheng(College of Aerospace Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing,210016,China;School of Materials Science and Engineering,Southeast University,Nanjing,210096,China)

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016 [2]东南大学材料科学与工程学院,江苏南京210096

出　　处：《南京航空航天大学学报》2008年第3期399-403,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：江苏省自然科学基金前期预研(BK2005216)资助项目;国家自然科学基金(50178044)资助项目

摘　　要：用快冻法研究高性能的高强高模聚乙烯(High elasticity module polyethylene,HEMP)纤维对大掺量矿物掺合料高强混凝土(High strength concrete,HSC)抗冻性的影响。结果表明,大掺量矿物掺合料HSC具有较好的抗冻性,但是其抗冻性对养护环境RH非常敏感,干燥养护条件下的冻融寿命仅有标准养护的38%~40%。掺加0.1%HEMP纤维虽然降低了大掺量矿物掺合料HSC的抗冻性,但能够显著改善其抗冻性对养护环境RH的敏感性,在30%RH^50%RH养护条件下的冻融寿命高达标准养护时的81%~90%。The effect of high elasticity module polyethylene(HEMP)fiber on freeze-thaw durability of concrete with high volume mineral admixtures at dry environment Is investigated by tlae acceleratea freeze-thaw test.Results show that though high strength concrete(HSC)with high volume mineral admixtures demonstrates good frost resistance,the resistance is sensitive to the relative humidity(RH)of curing environment.For samples cured in dry environment,the freeze-thaw life ranges from 38%to 40%of that of samples cured under standard conditions.For samples with 0.1%HEMP fiber,although the frost resistance decreases a little,the frost resistance sensitivity can be improved.For samples cured in 30%RH to 50%RH environment,the freeze-thaw life can reach 81%to 90%of that of standard cured samples.

关 键 词：大掺量矿物掺合料 高强混凝土 抗冻性 膨胀剂 高强高模聚乙烯纤维 

分 类 号：TU528[建筑科学—建筑技术科学]