Journal
MATERIALS
Volume 14, Issue 13, Pages -Publisher
MDPI
DOI: 10.3390/ma14133669
Keywords
steel-fiber-reinforced concrete; vibration stirring; mechanical properties; microstructure
Categories
Funding
- National Natural Science Foundation of China [52079128]
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This study investigates how vibration stirring, steel-fiber volume ratio, and matrix strength influence the mechanical properties of steel-fiber-reinforced concrete. It is found that vibration mixing produces concrete with better mechanical properties compared to ordinary mixing, with a linear relationship between mechanical properties and matrix strength as well as fiber volume ratio. Additionally, microscopic studies show that vibration stirring optimizes the microstructure and enhances homogeneity of steel-fiber-reinforced concrete.
This work addresses how vibration stirring, steel-fiber volume ratio, and matrix strength affect the mechanical properties of steel-fiber-reinforced concrete. The goal of the work is to improve the homogeneity of steel-fiber-reinforced concrete, which is done by comparing the mechanical properties of steel-fiber-reinforced concrete fabricated by ordinary stirring with that fabricated by vibration stirring. The results show that the mechanical properties of steel-fiber-reinforced concrete produced by vibration mixing are better than those produced by ordinary mixing. The general trend is that the mechanical properties of steel-fiber concrete have a linear relationship with the matrix strength and the volume ratio of steel fiber. The best mechanical properties are obtained for a steel-fiber volume ratio of less than 1%. We have also established calculation models for the mechanical performance index of vibration, mixing steel-fiber concrete based on the test results. Microscopic studies show that vibration stirring optimizes the microstructure of the transition zone between the concrete interface and the slurry, and improves the homogeneity of the steel-fiber-reinforced concrete, and enhances the adhesion between the mixture components.
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