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[1]姜允庆,刘宏伟,李 亮,等.桥梁伸缩装置锚固区混杂纤维混凝土力学性能及抗冻性试验研究[J].武汉工程大学学报,2019,(04):380-385.[doi:10. 3969/j. issn. 1674?2869. 2019. 04. 015]
 JIANG Yunqing,LIU Hongwei,LI Liang,et al.Experimental Study on Mechanical Properties and Frost Resistance of Hybrid Fiber Concrete in Anchorage Zone of Bridge Expansion Device[J].Journal of Wuhan Institute of Technology,2019,(04):380-385.[doi:10. 3969/j. issn. 1674?2869. 2019. 04. 015]
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桥梁伸缩装置锚固区混杂纤维混凝土力学性能及抗冻性试验研究(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2019年04期
页码:
380-385
栏目:
资源与土木工程
出版日期:
2019-09-27

文章信息/Info

Title:
Experimental Study on Mechanical Properties and Frost Resistance of Hybrid Fiber Concrete in Anchorage Zone of Bridge Expansion Device
文章编号:
20190415
作者:
姜允庆1刘宏伟1李 亮2黄民水*2胡国祥2
1. 安徽省新路建设工程集团有限责任公司,安徽 阜阳 236000;2. 武汉工程大学土木工程与建筑学院,湖北 武汉 430074
Author(s):
JIANG Yunqing1 LIU Hongwei1 LI Liang2 HUANG Minshui*2HU Guoxiang2
1. Anhui Xinlu Construction Engineering Co., Ltd, Fuyang 236000, China;2. School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
关键词:
混杂纤维力学性能抗冻性锚固区混凝土桥梁伸缩装置
Keywords:
hybrid fiber mechanical properties frost resistance concrete in anchorage zone bridge expansion device
分类号:
U416.217
DOI:
10. 3969/j. issn. 1674?2869. 2019. 04. 015
文献标志码:
A
摘要:
为了延长桥梁伸缩装置锚固区混凝土的使用寿命,减少维修次数,本文通过试验研究了混杂纤维混凝土早期力学性能及抗冻性。首先分析了混杂纤维混凝土的混杂机理;随后制作了38组混杂纤维混凝土试件,试验中2种纤维按照不同的体积掺量掺入混凝土中,并进行了抗压强度、抗折强度和抗冻性试验;最后,计算了混杂效应,确定了最优的纤维体积掺量。结果表明:钢纤维体积掺量为1.5%与聚乙烯醇纤维体积掺量为0.12%时,混杂纤维混凝土表现出较好的效果,1 d和3 d立方体抗压强度提高了30.9%和31.7%,1 d和3 d抗折强度提高了81.4%和65.5%,50次冻融循环后强度损失率为2.5%,质量损失率为0.6%。本文的研究结果可用于公路桥梁伸缩装置新建工程和维修更换中,有较强的工程应用价值。
Abstract:
To increase the service life of concrete in anchorage zone of bridge expansion device and reduce the maintenance times, the mechanical properties at early stage and frost resistance of hybrid fiber concrete were studied. Firstly, the mechanism of hybrid fiber concrete was analyzed. Secondly, 38 groups of hybrid fiber concrete specimens were prepared, in which two fibers were added with different volume fractions, followed with the investigation of compressive strength, rupture strength and frost resistance. Finally, the hybrid effects were calculated and the optimal fiber volume fraction was acquired. The results demonstrate that hybrid fiber concrete shows best performance when a 1.5% volume fraction of steel fiber and a 0.12% volume fraction of polyvinyl alcohol fiber are added. Its compressive strengths increase by 30.9% and 31.7%, rupture strengths increase by 81.4% and 65.5% respectively for 1 d and 3 d specimens. After 50 freeze-thaw cycles, the strength loss rate is 2.5% and the mass loss rate is 0.6%. These results have great engineering application values in new projects or maintenance and replacement works of highway expansion devices.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-03-19基金项目:安徽省交通运输科技进步计划项目(皖交科技函[2017]574号)作者简介:姜允庆,高级工程师。E-mail: 985256670@qq.com*通讯作者:黄民水,博士,副教授。E-mail: huangminshui@tsinghua.org.cn引文格式:姜允庆,刘宏伟,李亮,等. 桥梁伸缩装置锚固区混杂纤维混凝土力学性能及抗冻性试验研究[J]. 武汉工程大学学报,2019,41(4):380-385.
更新日期/Last Update: 2019-08-05