Identifying the influence of split tensile strength to crack width of high-strength reinforced concrete beam with polypropylene fiber from medical mask waste

Authors

DOI:

https://doi.org/10.15587/1729-4061.2024.298842

Keywords:

split tensile strength, crack width, high-strength, reinforced concrete beam, medical mask waste, polypropylene fiber

Abstract

Cracks in concrete structures due to tensile weakness can be repaired by using fiber concrete, including medical mask waste as an additive in high-strength concrete mixes. This research the influence of polypropylene fiber from medical mask waste on the mechanical characteristics, flexural behavior, and crack width of high-strength reinforced concrete (RC) beams. The initial stage involved examining the properties of the concrete constituent materials. The testing process was based on a high-strength concrete mix design using the Aitchin method mix design sheet. Compressive strength and split tensile strength were tested at fiber content (0 %, 0.15 %, 0.20 %, and 0.25 %). The three-point flexural testing procedure was carried out at 28 days on 1200×100×150 (mm) RC beams. The use of LVDT, strain gauge, and other measuring devices supported the acquisition of the required data. The results showed that the split tensile strength reached the optimum value of 66.19 MPa at 0.24 % fiber content. Polypropylene fiber from medical mask waste in RC beams showed a positive impact on reducing crack width at increased split tensile strength. Waste mask fiber content of 0.15 %, 0.20 % and 0.25 % gave stable and better results compared to 0 % content (no fiber). With high steel stress (fs), and high strain, it offers the potential to improve the mechanical properties of high-strength concrete, thereby reducing the width of cracks that occur. This improves the tensile weakness of the concrete. The effect of split tensile strength on the crack width (w) of beams with the formula approach: wexp=3.74ftf-1.513, wan=0.187ftf-0.022 shows that the experimental results have a significant effect on decreasing the crack width that occurs in high-strength RC beams, thereby improving the quality of concrete

Supporting Agency

  • We thank LPPM Brawijaya University for providing financial support in the Doctoral Dissertation Research (PDD) DRTPM DIKTI TA Research Program 2023, thus assisting in the completion of this research.

Author Biographies

Diana Ningrum, Brawijaya University; Tribhuwana Tungga Dewi University

Student Civil Engineering Doctoral Program

Department of Civil Engineering

Lecturer

Department of Civil Engineering

Agoes Soehardjono, Brawijaya University

Professor Civil Engineering Doctoral Program

Department of Civil Engineering

Hendro Suseno, Brawijaya University

Associate Professor Civil Engineering Doctoral Program

Department of Civil Engineering

Ari Wibowo, Brawijaya University

Asisstant Professor Civil Engineering Doctoral Program

Department of Civil Engineering

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Identifying the influence of split tensile strength to crack width of high-strength reinforced concrete beam with polypropylene fiber from medical mask waste

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Published

2024-02-28

How to Cite

Ningrum, D., Soehardjono, A., Suseno, H., & Wibowo, A. (2024). Identifying the influence of split tensile strength to crack width of high-strength reinforced concrete beam with polypropylene fiber from medical mask waste. Eastern-European Journal of Enterprise Technologies, 1(7 (127), 14–21. https://doi.org/10.15587/1729-4061.2024.298842

Issue

Vol. 1 No. 7 (127) (2024): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2024 Diana Ningrum, Agoes Soehardjono, Hendro Suseno, Ari Wibowo

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