徐义洪1,2,范颖芳1
盐冻环境下氧化石墨烯混凝土力学损伤试验研究
Experimental Study on Mechanical Damage of Grapheme Oxide Concrete under the Salt Freezing Environment
2019年第5期
盐冻;氧化石墨烯;混凝土;力学损伤
Salt-frost; Graphene oxide; Concrete; Mechanical damage
2019年第5期
10.19761/j.1000-4637.2019.05.009.05
国家自然科学基金资助项目(51578099)
徐义洪1,2,范颖芳1
1.大连海事大学道路与桥梁工程研究所,116026;2.辽宁省桥梁安全工程技术研究中心,沈阳 110122
徐义洪,范颖芳.盐冻环境下氧化石墨烯混凝土力学损伤试验研究[J].混凝土与水泥制品,2019(5):9-12+18.
XU Y H,FAN Y F.Experimental Study on Mechanical Damage of Grapheme Oxide Concrete under the Salt Freezing Environment[J].China Concrete and Cement Products,2019(5):9-12+18.
浏览量:
1000
盐冻环境下氧化石墨烯混凝土力学损伤试验研究
英文名 :
Experimental Study on Mechanical Damage of Grapheme Oxide Concrete under the Salt Freezing Environment
刊期 :
2019年第5期
关键词 :
盐冻;氧化石墨烯;混凝土;力学损伤
Key words :
Salt-frost; Graphene oxide; Concrete; Mechanical damage
刊期 :
2019年第5期
DOI :
10.19761/j.1000-4637.2019.05.009.05
文章编号 :
基金项目 :
国家自然科学基金资助项目(51578099)
作者 :
徐义洪1,2,范颖芳1
单位 :
1.大连海事大学道路与桥梁工程研究所,116026;2.辽宁省桥梁安全工程技术研究中心,沈阳 110122
徐义洪1,2,范颖芳1
徐义洪,范颖芳.盐冻环境下氧化石墨烯混凝土力学损伤试验研究[J].混凝土与水泥制品,2019(5):9-12+18.
XU Y H,FAN Y F.Experimental Study on Mechanical Damage of Grapheme Oxide Concrete under the Salt Freezing Environment[J].China Concrete and Cement Products,2019(5):9-12+18.
摘要
参数
结论
参考文献
引用本文
摘 要:为了研究盐冻循环作用对氧化石墨烯(GO)混凝土力学性能的影响,分别对GO混凝土进行0、50、100、150、200次快速冻融循环,对经历不同盐冻循环的试件进行了单轴压缩试验,研究了盐冻循环后试件的质量变化和应力-应变曲线等的变化规律,在此基础上分析了盐冻循环作用下,GO混凝土材料的损伤劣化机制。结果表明:随着盐冻次数的增加,GO混凝土劣化模式表现为砂浆脱落、微裂纹扩展、剥蚀和块状脱落等多种形式相结合;试件的应力-应变曲线随着盐冻次数的增加趋于扁平,峰值应力逐渐减小,峰值应变逐渐增加,弹性模量显著减小;此外,GO混凝土盐冻损伤变量与冻融循环次数呈良好的指数关系。
Abstract: In order to study the effect of salt freezing cycle on the mechanical behavior of graphene oxide concrete, the uniaxial compression experiments were carried out after 0, 50, 100, 150 and 200 cycles of the freezing and thawing. The specimen of quality change, mechanical characteristics of materials such as stress-strain curve and so on were analyzed, and the damage degradation mechanism of graphene oxide concrete in salt freezing cycle was systematically studied. The results show that the damage degradation model of graphene oxide concrete due to salt freezing cycle presents diversity, with the increase of salt freezing cycle times, mortar gradually shed from sample surface, micro-cracks appear and propagation combining denudation and block falling. Meanwhile the more the times of salt freezing cycle, the reduction of the peak stress and the elastic modulus, the increase of the peak strain, so the stress-strain curves of the specimens tend to be flat. In addition, the damage variable of graphene oxide concrete and the freeze-thaw cycles have a good exponential relationship.
关键词:
盐冻;氧化石墨烯;混凝土;力学损伤
扫二维码用手机看
版权所有:中国混凝土与水泥制品网 苏ICP备10086386号 网站建设:中企动力 苏州