<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The use of waste materials in civil engineering applications has gained importance nowadays. Consuming limited natural resources and increasing waste disposal costs have led researchers to evaluate waste materials for different geotechnical applications. In this respect, some waste materials are used as reinforcement in soils to improve their engineering properties. The main objective of this paper was to investigate the usability of waste polypropylene fiber as a reinforcement material in high plasticity fine-grained soils. For this purpose, waste toothbrush bristle (WTB) was used as a polypropylene fiber reinforcement material and added to fine-grained soil at ratios of 0.2%, 0.4%, 0.6% and 0.8% by dry total weight. The effect of WTB on freezing–thawing behavior and unconfined compression strength of unreinforced and reinforced clayey soil was evaluated. The results indicated that addition of WTB to high plasticity clay improved its behavior against freezing–thawing. Also, undrained shear strength increases with respect to increment in WTB ratio.</p></abstract>

The use of waste materials in civil engineering applications has gained importance nowadays. Consuming limited natural resources and increasing waste disposal costs have led researchers to evaluate waste materials for different geotechnical applications. In this respect, some waste materials are used as reinforcement in soils to improve their engineering properties. The main objective of this paper was to investigate the usability of waste polypropylene fiber as a reinforcement material in high plasticity fine-grained soils. For this purpose, waste toothbrush bristle (WTB) was used as a polypropylene fiber reinforcement material and added to fine-grained soil at ratios of 0.2%, 0.4%, 0.6% and 0.8% by dry total weight. The effect of WTB on freezing–thawing behavior and unconfined compression strength of unreinforced and reinforced clayey soil was evaluated. The results indicated that addition of WTB to high plasticity clay improved its behavior against freezing–thawing. Also, undrained shear strength increases with respect to increment in WTB ratio.

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

Civil Engineering Department, Engineering Faculty

Studia Geotechnica et Mechanica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The use of waste materials in civil engineering applications has gained importance nowadays. Consuming limited natural resources and increasing waste disposal...

Sample Description	WTB Ratio (%)	Number of Cycles
Unreinforced	0.0	0–3–6–9–12
Reinforced-1	0.2	0–3–6–9–12
Reinforced-2	0.4	0–3–6–9–12
Reinforced-3	0.6	0–3–6–9–12
Reinforced-4	0.8	0–3–6–9–12

Properties	Value
Liquid limit¹, w_L (%)	57.8
Plastic limit², w_P (%)	24.4
Plasticity index, I_P (%)	33.4
Optimum water content³, w_opt (%)	23.6
Maximum dry unit weight³, γ_dmax (kN/m³)	15.3
Soil class (USCS)	CH

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

Article Category: 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

Schlüsselwörter
Waste material, Polypropylene fiber, Toothbrush bristle, Freezing–thawing, Unconfined compression test, Reinforced clay

© 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

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Prepared samples, WTB ratios and number of freezing–thawing cycles.

Some properties of clayey soil used in tests.

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

Article Category: 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

SchlüsselwörterWaste material, Polypropylene fiber, Toothbrush bristle, Freezing–thawing, Unconfined compression test, Reinforced clay

© 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

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Prepared samples, WTB ratios and number of freezing–thawing cycles.

Some properties of clayey soil used in tests.

Schlüsselwörter
Waste material, Polypropylene fiber, Toothbrush bristle, Freezing–thawing, Unconfined compression test, Reinforced clay