CAJ | 학술논문

为确保核废料运输安全以及长期耐久性,采用正交化配比设计,在混凝土中单掺和混掺钢纤维、聚丙烯纤维、粉煤灰,分别在常温下和受热150℃后进行弯曲韧性试验,通过极差和方差分析,量化了各掺料类型和掺量对于混凝土韧性的影响效果:纤维类型和掺量对于高性能混凝土开裂后力学性能的改善效果更加明显,受热后这-特征更为显著;长度较长、剪切螺纹型的钢纤维A在受热前后阻裂增韧效果均最佳;随着纤维掺量的增加,混掺钢纤维混凝土的弯曲性能基本呈现增强趋势,若总掺量相近,常温下混掺钢纤维混凝土弯曲性能优于单掺,受热后二者性能相近.
위학보핵폐료운수안전이급장기내구성,채용정교화배비설계,재혼응토중단참화혼참강섬유、취병희섬유、분매회,분별재상온하화수열150℃후진행만곡인성시험,통과겁차화방차분석,양화료각참료류형화참량대우혼응토인성적영향효과:섬유류형화참량대우고성능혼응토개렬후역학성능적개선효과경가명현,수열후저-특정경위현저;장도교장、전절라문형적강섬유A재수열전후조렬증인효과균최가;수착섬유참량적증가,혼참강섬유혼응토적만곡성능기본정현증강추세,약총참량상근,상온하혼참강섬유혼응토만곡성능우우단참,수열후이자성능상근.
To ensure the carrying safety and long-term durability of nuclear waste, the tests of flexural properties were carried out respectively at normal temperature and after being heated to 150℃ using orthogonal mix proportion design and incorporating steel, polypropylene hybrid fiber, fly ash or steel fiber solely in the concrete. Based on gradation and variance analyses, different kinds of admixtures and their effects on toughness of concrete are quantified. Fiber type and incorporation can improve the mechanical properties of high performance concrete effectively after cracking, which is more remarkable after being heated. Steel fiber A with sheared threads has the best effect on anti-cracking and toughening at pre-and post heating. With the increase of fiber incorporations, the flexibility of hybrid steel fiber concrete increases basically. The hybrid steel fiber is better than steel fiber with single incorporation in flexural properties at normal temperature, but no difference after being heated.