Article Open Access http://dx.doi.org/10.26855/ea.2025.01.002
Design and Experimental Study of Steel Fiber Concrete Mix Ratio in Anchorage Area of Expansion Joints of Highway Bridges
Chong Chen*, Yipeng Wei, Jingjing Wang, Jiaqi Wang
Zhengzhou Business University, Zhengzhou 451200, Henan, China.
*Corresponding author: Chong Chen
Published: February 26,2025
Abstract
Bridges in the highway are becoming more and more important, expansion joint anchorage area concrete in the vehicle impact load is prone to stress concentration, resulting in cracking, spalling, and damage, affecting the interface between the roadway and the bridge deck, hindering the normal operation of traffic. In order to study the working performance and force performance of steel fiber concrete, based on the raw material and performance requirements of steel fiber con-crete in the anchorage area of expansion joints in actual bridge projects, the base mix ratio of steel fiber concrete is obtained with reference to the specification. Steel fiber admixture (SFD), sand rate (SR), and bone-cement ratio (BGR) were used as variable factors in orthogonal tests to investigate the effects of these three factors on the physical and mechanical properties of steel fiber concrete. The results showed that the “scaffolding” effect formed by steel fibers in the concrete mix reduced the collapse of the mix and increased the degree of expansion. Steel fiber has no significant effect on the compressive strength of concrete, and steel fiber significantly improves the flexural strength of concrete, with an increase of more than 19.42%. Under the premise that the working performance meets the requirements, the stress performance is relatively optimal for the test number GHT-5 proportion design, SR is 43%, SFD is 90, and BGR is 1.55.
References
[1] Deng Y, Li A, Ding Y, Sun P. Identification of expansion joint damage in large-span bridge structures based on long-term moni-toring data. J Southeast Univ (Nat Sci Ed). 2011;41(02):336-41.
[2] Xu RT. Research on the design and performance of no-mill asphalt mixtures in the transition zone of bridge expansion joints [dissertation]. Chang’an University; 2023.
[3] Kelly AL, Atadero RA, Mahmoud HN. Life Cycle Cost Analysis of Deteriorated Bridge Expansion Joints. Pract Period Struct Des Constr. 2019;24(1).
[4] Xiao L, Yue Y, Shi C, Guo Z. Research in Destruction of Concrete Bridge Expanded Joint Influenced by Temperature Difference. Appl Mech Mater. 2015;3843(744-746).
[5] Warda MA, Khali HS, Ahmad S, et al. Optimum sustainable mix proportions of high strength concrete by using Taguchi method. Frattura ed Integrità Strutturale. 2020;14(54):211-25.
[6] Yu J, Zhang F, Jia L, Huang C, Wang G. Optimization of mix ratio design of steel fiber concrete. J Shenyang Univ Technol. 2006;(02):182-7.
[7] Ministry of Transportation and Communications of the People’s Republic of China. JTG/TF50-2020. Technical specification for highway bridge and culvert construction. Beijing: China Construction Industry Press; 2020.
[8] Ministry of Construction of the People’s Republic of China. GB/T 50081-2002. Standard of Test Methods for Mechanical Properties of Ordinary Concrete. Beijing: China Construction Industry Press; 2002.
[9] Ministry of Construction of the People’s Republic of China. GB/T50081-2019. Standard of test methods for physical and mechanical properties of concrete. Beijing: China Construction Industry Press; 2019.
How to cite this paper
Design and Experimental Study of Steel Fiber Concrete Mix Ratio in Anchorage Area of Expansion Joints of Highway Bridges
How to cite this paper: Chong Chen, Yipeng Wei, Jingjing Wang, Jiaqi Wang. (2025). Design and Experimental Study of Steel Fiber Concrete Mix Ratio in Anchorage Area of Expansion Joints of Highway Bridges. Engineering Advances, 5(1), 7-14.
DOI: http://dx.doi.org/10.26855/ea.2025.01.002