车桥耦合扰动对硫铝酸盐水泥混凝土修补材料性能的影响

材料导报

2019, Vol. 33

Issue (Z2): 288-292

无机非金属及其复合材料

车桥耦合扰动对硫铝酸盐水泥混凝土修补材料性能的影响

何欢¹, 杨荣俊², 文俊强², 唐芮枫¹, 王子明¹

1 北京工业大学材料科学与工程学院,北京 100124;
2 北京市高强混凝土有限责任公司,北京 100022

Study on the Influence of Vehicle-Bridge Coupled Vibration on the Performanceof Sulphoaluminate Cement-based Concrete Repair Materials

HE Huan¹, YANG Rongjun²,WEN Junqiang²,TANG Ruifeng¹, WANG Ziming¹

1 College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124;
2 Beijing Municipal Road & Bridge Group Co., Ltd., Beijing 100022

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摘要本研究针对硫铝酸盐水泥混凝土材料在公路桥梁修复工程中、在开放交通施工条件下,受车桥耦合扰动作用易产生性能损伤及开裂现象等问题展开。首先通过实地检测确定半幅通车施工条件下车桥耦合扰动的具体参数范围,并在此基础上利用电磁扰动台模拟桥梁扰动,研究了扰动对硫铝酸盐水泥混凝土修补材料性能的影响规律。实验结果表明,在实测确定的扰动参数范围内,扰动频率在6 Hz以下的扰动对硫铝酸盐水泥混凝土的抗压、抗折强度无明显影响,当扰动频率在9 Hz以上、扰动振幅超过1.0 mm时,扰动使混凝土早期抗压强度稍有提高,但会明显降低硫铝酸盐水泥混凝土的抗折强度。通过电通量测试表明扰动会使硫铝酸盐水泥混凝土内部结构造成损伤。通过孔结构测试表明,扰动会增大混凝土有害孔与多害孔的比例,进而影响其力学性能。

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关键词: 车桥耦合扰动硫铝酸盐水泥混凝土混凝土性能内部结构

Abstract: In the highway bridge repair engineering, the sulphoaluminate cement concrete material was subject to the problems of performance damage and cracking caused by the coupling vibration of the vehicle under the open traffic construction conditions. In response to this problem, this paper determined the actual parameters of vehicle-bridge coupled vibration under half-way traffic construction conditions by field test, and the inf-luence of vibration on the performance of sulphoaluminate cement-based concrete was studied by the electromagnetic vibration table to simulate bridge vibration in the laboratory. The experiment results showed that there is no obvious influence on the compressive and flexural strength of sulphoaluminate cement concrete when the vibration frequency was below 6 Hz. When the vibration frequency was above 9 Hz and the vibration amplitude exceeded 1.0 mm, the coupled vibration effect resulted in higher early compressive strength while impaired the significantly flexural strength of the sulphoaluminate cement concrete. The rapid chloride permeability test and the pore structure test showed that the vibration could damage the internal structure of the sulphoaluminate cement-based concrete and increase the proportion of deleterious pore of concrete which in turn affects its mechanical properties.

Key words: vehicle-bridge coupled vibration sulphoaluminate cement-based concrete concrete properties internal structure

出版日期: 2019-11-25 发布日期: 2019-11-25

ZTFLH:

TU528.3

通讯作者: wangziming@bjut.edu.cn

作者简介: 何欢,北京工业大学研究生,从事高性能水泥基材料、化学外加剂和生态建材方面的研究工作。
王子明,北京工业大学教授,研究生导师,长期从事高性能水泥基材料、水泥混凝土流变学与化学外加剂和生态建材方面的研究工作,曾获中国建材行业科技进步一等奖1项、二等奖3项、三等奖1项,全国优秀科技情报成果三等奖1项、全国发明协会金奖等。获得国家发明专利授权60余项,美国发明专利授权2项。已经指导培养研究生40余人,编著《聚羧酸系高性能减水剂-制备性能与应用》《混凝土高效减水剂》,化工产品手册《混凝土外加剂》,编译《水泥制造工艺技术》,参加编写专著4部,在国内外发表论文100余篇。

引用本文:

何欢, 杨荣俊, 文俊强, 唐芮枫, 王子明. 车桥耦合扰动对硫铝酸盐水泥混凝土修补材料性能的影响[J]. 材料导报, 2019, 33(Z2): 288-292.
HE Huan, YANG Rongjun,WEN Junqiang,TANG Ruifeng, WANG Ziming. Study on the Influence of Vehicle-Bridge Coupled Vibration on the Performanceof Sulphoaluminate Cement-based Concrete Repair Materials. Materials Reports, 2019, 33(Z2): 288-292.

链接本文:

http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/IZ2/288

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