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

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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

Published: 25 November 2019

CLC number:

TU528.3

About author:: Huan He, graduate student of Beijing University of Technology, engaged in research work on high perfor-mance cement-based materials, chemical admixtures and ecological building materials.
Ziming Wang, professor of Beijing University of Technology, postgraduate tutor, has long been engaged in high-performance cement-based materials, cement concrete rheology and chemical admixtures and ecological building materials research, has won the first prize of the scientific and technological progress of China’s building materials industry, second prize, 3 One item, one third prize, one third prize of national outstanding scientific and technological information achievements, and the gold medal of National Invention Association. He has obtained more than 60 national invention patents and 2 US invention patents. He has trained more than 40 graduate students, compiled Polycarboxylic Acid-Based High Performance Water Redu-cer-Preparation Performance and Application, Concrete High-Efficiency Water Reducer, chemical product manual Concrete Admixture, compiled Cement Manufacturing Process Technology, Participated in the preparation of 4 monographs and published more than 100 papers at home and abroad.

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	HE Huan
	YANG Rongjun
	WEN Junqiang
	TANG Ruifeng
	WANG Ziming

Cite this article:

HE Huan,YANG Rongjun,WEN Junqiang, et al. Study on the Influence of Vehicle-Bridge Coupled Vibration on the Performanceof Sulphoaluminate Cement-based Concrete Repair Materials[J]. Materials Reports, 2019, 33(Z2): 288-292.

URL:

http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2019/V33/IZ2/288