Flexural Behavior of Corroded Steel Fiber Reinforced Concrete Beams  with Variable Fiber Contents

Seihak Heang; Pornpen Limpaninlachat; Punyawut Jiradilok; Thatchavee Leelawat; Withit Pansuk

Seihak Heang Mahidol University
Pornpen Limpaninlachat Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, THAILAND
Punyawut Jiradilok Department of Civil Engineering, Faculty of Engineering, Kasetsart University, THAILAND
Thatchavee Leelawat Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, THAILAND
Withit Pansuk Center of Excellence in Innovative Construction Materials, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, THAILAND

Keywords: Steel Fiber Reinforced Concrete, Steel Corrosion, Flexural Performance, Crack Width, Failure Pattern

Abstract

Steel fiber reinforced concrete (SFRC) is introduced to the construction due to the capability of the load enhancement and restraining the crack opening, which leads to higher structural performance and longer durability. The main purpose of this study was to study the effectiveness of steel fiber contents in SFRC beams under corrosion to the crack propagation, flexural loading capacity and corresponding failure pattern. A total of 4 SFRC beams were fabricated with same dimension of 100 x 200 x 1400 mm including 4 deformed bars with diameter of 12mm. Moreover, 6mm stirrups were reinforced to avoid shear failure. The contents of mil-cut steel fiber varied from 0%, 0.5%, 1.0% and 1.5%. All specimens were accelerated by the impressive current (ICT) method within 19 days. Crack width of the specimens were measured and recorded to analyze the crack propagation during the ICT method. Specimens were subjected to the four-point bending test for investigating the capacity, deflection, and failure pattern. After the bending test, the steel reinforced rebars were extracted from the specimens to observe the actual corrosion degree. The results showed that the increase of fiber contents could reduce the overall crack and lead to the higher yield and ultimate loading capacity of SFRC as well.

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Author Biographies

Pornpen Limpaninlachat, Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, THAILAND

Punyawut Jiradilok, Department of Civil Engineering, Faculty of Engineering, Kasetsart University, THAILAND

Thatchavee Leelawat, Department of Civil and Environmental Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom, THAILAND

Withit Pansuk, Center of Excellence in Innovative Construction Materials, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, THAILAND