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Influence of Waste Toothbrush Fiber on Strength and Freezing–Thawing Behavior in High Plasticity Clay

Fatih Isik

Fatih Isik

Technical Vocational School of Higher Education, Ataturk UniversityErzurum, Turkey
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Isik, Fatih
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R. Kagan Akbulut

R. Kagan Akbulut

Technical Vocational School of Higher Education, Ataturk UniversityErzurum, Turkey
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Akbulut, R. Kagan
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A. Sahin Zaimoglu

A. Sahin Zaimoglu

Civil Engineering Department, Engineering Faculty, Ataturk UniversityErzurum, Turkey
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Zaimoglu, A. Sahin
  
23. Okt. 2020
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Artikel-Kategorie: Original Study
Online veröffentlicht: 23. Okt. 2020
Seitenbereich: 15 - 21
Eingereicht: 03. Juni 2020
Akzeptiert: 15. Sept. 2020
DOI: https://doi.org/10.2478/sgem-2020-0006
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© 2021 Fatih Isik et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Toothbrush bristles (a) after cutting, (b) after mixing with dry soil, (c) after adding optimum water content.
Toothbrush bristles (a) after cutting, (b) after mixing with dry soil, (c) after adding optimum water content.

Figure 2

Closed system full automatic freezing–thawing test cabinet.
Closed system full automatic freezing–thawing test cabinet.

Figure 3

Stress–strain curves of samples at (a) 0 cycle, (b) 3 cycles, (c) 6 cycles, (d) 9 cycles, (e)12 cycles.
Stress–strain curves of samples at (a) 0 cycle, (b) 3 cycles, (c) 6 cycles, (d) 9 cycles, (e)12 cycles.

Figure 4

Unconfined compression test: (a) unreinforced sample (9 cycles), (b) reinforced sample (toothbrush bristles 0.8% ratio, 9 cycles).
Unconfined compression test: (a) unreinforced sample (9 cycles), (b) reinforced sample (toothbrush bristles 0.8% ratio, 9 cycles).

Figure 5

Waste toothbrush bristle ratio vs. undrained shear strength.
Waste toothbrush bristle ratio vs. undrained shear strength.

Figure 6

Relationship between (a) the peak UCS ratio, (b) the ultimate UCS ratio and freezing–thawing cycles.
Relationship between (a) the peak UCS ratio, (b) the ultimate UCS ratio and freezing–thawing cycles.

Figure 7

Relationship between FTML and freezing–thawing cycles.
Relationship between FTML and freezing–thawing cycles.

Prepared samples, WTB ratios and number of freezing–thawing cycles_

Sample DescriptionWTB Ratio (%)Number of Cycles
Unreinforced0.00–3–6–9–12
Reinforced-10.20–3–6–9–12
Reinforced-20.40–3–6–9–12
Reinforced-30.60–3–6–9–12
Reinforced-40.80–3–6–9–12

Some properties of clayey soil used in tests_

PropertiesValue
Liquid limit1, wL (%)57.8
Plastic limit2, wP (%)24.4
Plasticity index, IP (%)33.4
Optimum water content3, wopt (%)23.6
Maximum dry unit weight3, γdmax (kN/m3)15.3
Soil class (USCS)CH
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