Influence of crack on the permeability of plastic concrete


He Y. Alyousef R. Alaskar A. Alabduljabbar H. Mohamed A.M. Maureira-Carsalade N. Roco-Videla A. Issakhov A. Assilzadeh H.
May 2021Techno-Press

Smart Structures and Systems
2021#27Issue 5871 - 890 pp.

This study examined the relations between permeability of the concrete due to addition of new cracks. The different concrete types analyzed were standard concrete, reinforced steel fiber concrete, and reinforced concrete polypropylene fiber. In consideration of the improved polypropylene content of polypropylene fiber reinforced concrete, the crack diameter was decreased by 72-93% for up to 0.25% fiber and cracks were eliminated with 0.3% fiber inclusion. In terms of steel fiberreinforced concrete, the results showed that steel reinforcing macro fibers decrease the permeability of cracked concrete at wider crack widths. While the permeability of unreinforced concrete was the highest, 0.5% steel content resulted in lower permeability while a higher steel content concrete with 1% steel had the lowest permeability. Crack stitching phenomenon and the effect of multiple cracks may be attributed to the decrease in the permeability. With respect to normal concrete, the findings showed the crack opening displacement at the highest tension is less than 20 microns. At this loading stage, after unloading, around 80% of the displacement is restored and the residual crack opening is notably small, indicating the low impact of cracking on concrete permeability (CP) and showing that CP was increased with crack width. As a result, adding polypropylene aggregate to concrete could significantly reduce the width of crack, while adding steel fiber to concrete reduces the permeability of cracked concrete compared to normal concrete which may result in a minor crack on CP.

Bentonite to cement ratio (B/C) , Crack , Permeability , Plastic concrete , Water to cement ratio (W/C)

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Yiwu Industrial and Commercial College, Yiwu, Zhejiang, 322000, China
Department of Civil Engineering, College of Engineering, Prince Sattam bin Abdulaziz University, Al-kharj, 11942, Saudi Arabia
Department of Civil Engineering, College of Engineering, King Saud University, Riyadh, 11362, Saudi Arabia
Facultad de Ingeniería, Universidad Católica de la Santísima Concepción, Chile
Programa Magister en ciencias químico-biológicas, Facultad de Ciencias de la Salud, Universidad Bernardo OHiggins, Santiago, Chile
Al-Farabi Kazakh National University, Almaty, Kazakhstan
Kazakh-British Technical University, Almaty, Kazakhstan
Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam

Yiwu Industrial and Commercial College
Department of Civil Engineering
Department of Civil Engineering
Facultad de Ingeniería
Programa Magister en ciencias químico-biológicas
Al-Farabi Kazakh National University
Kazakh-British Technical University
Institute of Research and Development

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