Al-Mulla, I., al-Attar, T., Al-Ameeri, A., Al-Rihimy, A. (2023). Strain capacity and flexural strength behavior of bendable concrete produced with different polymeric fibers. , 42(5), 516-524. doi: 10.30684/etj.2023.142430.1531
Ikram F. Ahmed Al-Mulla; Tareq al-Attar; Abbas Al-Ameeri; Ammar Al-Rihimy. "Strain capacity and flexural strength behavior of bendable concrete produced with different polymeric fibers". , 42, 5, 2023, 516-524. doi: 10.30684/etj.2023.142430.1531
Al-Mulla, I., al-Attar, T., Al-Ameeri, A., Al-Rihimy, A. (2023). 'Strain capacity and flexural strength behavior of bendable concrete produced with different polymeric fibers', , 42(5), pp. 516-524. doi: 10.30684/etj.2023.142430.1531
Al-Mulla, I., al-Attar, T., Al-Ameeri, A., Al-Rihimy, A. Strain capacity and flexural strength behavior of bendable concrete produced with different polymeric fibers. , 2023; 42(5): 516-524. doi: 10.30684/etj.2023.142430.1531

Strain capacity and flexural strength behavior of bendable concrete produced with different polymeric fibers

Engineering and Technology Journal
Volume 42, Issue 5, May 2024, Pages 516-524    PDF (692.65 K)
Document Type: Research Paper
DOI: 10.30684/etj.2023.142430.1531
Authors
Ikram F. Ahmed Al-Mulla* 1; Tareq al-Attar1; Abbas Al-Ameeri2; Ammar Al-Rihimy3
1Civil Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.
2Civil Engineering Dept., University of Babylon, Babylon University, Iraq.
3Civil Engineering Dept., Middle Technical University, Baghdad, Iraq.
Abstract
The incorporation of fibers into engineered cementitious composite concrete imparts flexibility to the material. Therefore, using different types and contents of polymeric fibers would affect the behavior of such concrete types, and it is worth contemplating. The present research aims to study the flexural strength and the strain capacity of engineered cementitious composite concrete produced with polyvinyl alcohol fibers (PVA) and polypropylene fibers (PP) with different volume fractions (1%, 1.5%, and 2%). Six mixes of engineered cementitious composite concrete of three grades of strengths, 30, 45, and 60 MPa, were produced. Results revealed that mixes of 60 MPa with 2% PVA fibers recorded the highest strain capacity, which reached (17.6%) compared to mixes of 60 MPa with 2% PP fibers. The maximum enhancement in the flexural strength was (4.3%),(6%), and (23%) for mixes of 30 MPa, 45 MPa and 60 MPa. This enhancement may open the horizon for using high-strength engineered cementitious composite concrete reinforced with PVA fibers in structural applications exposed to flexural strength, providing a lighter weight due to the exclusion of bar reinforcement. Also, its high strain capacity reduces the tendency for microcracks formation. The standard deviation error bars for the average flexural strengths of bendable concrete mixes with different fiber contents and types show no differences when comparing the same strength and fiber types. For example, mixes of 60 MPa with PVA fibers give less than 2 MPa standard deviation when compared for different fiber volume fractions.

Highlights
  • Engineered cementitious composite (ECC) can endure high tensile strength.
  • Polyvinyl alcohol (PVA) and polypropylene (PP) fibers enhance ECC tensile behavior.
  • PVA fibers improved flexural strength by 23% over PP fibers.
  • Higher percentages of PVA fiber increased engineered cementitious composite strain capacity.
Keywords
Bendable concrete; Mechanical properties; Polypropylene fibers; Polyvinyl alcohol fibers; Strain capacity
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