Strength and swelling properties of a waste tire textile fiber-reinforced expansive soil

Abbaspour, Mohsen; Narani, Shayan Sheikhi; Aflaki, Esmail; Nejad, Fereidoon Moghadas; Hosseini, S. Majdeddin Mir Mohammad

doi:10.1680/jgein.20.00010

Cited by 38 publications

(8 citation statements)

References 53 publications

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“…Conversely, they can be used in “colder” materials such as soil, cement or bituminous conglomerates [ 10 ]. For instance, the application of WTTF as reinforcing agents in expansive soil for impermeable liners and covers in landfill applications results in improved geotechnical characteristics such as split tensile strength, swelling–consolidation, volumetric shrinkage and desiccation cracking tests [ 47 ].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Fazli

Rodrigue

2022

Polymers

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Waste tire textile fibers (WTTF), as a by-product (10–15% by weight of tires) of end-of-life tires (ELT) mechanical recycling (grinding), are classified as hazardous wastes and traditionally burnt (thermal recycling) or buried (landfilling), leading to several environmental and ecological issues. Thus, WTTF still represent an important challenge in today’s material recycling streams. It is vital to provide practical and economical solutions to convert WTTF into a source of inexpensive and valuable raw materials. In recent years, tire textile fibers have attracted significant attention to be used as a promising substitute to the commonly used natural/synthetic reinforcement fibers in geotechnical engineering applications, construction/civil structures, insulation materials, and polymer composites. However, the results available in the literature are limited, and practical aspects such as fiber contamination (~65% rubber particles) remain unsolved, limiting WTTF as an inexpensive reinforcement. This study provides a comprehensive review on WTTF treatments to separate rubber and impurities and discusses potential applications in expansive soils, cement and concrete, asphalt mixtures, rubber aerogels and polymer composites.

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Section: Introductionmentioning

confidence: 99%

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Fazli

Rodrigue

2022

Polymers

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“…Recycled ELT-based derivatives, with synthetic rubber being their main constituent, are resilient, light-weight and skin-resistive; these attributes make them one of the most suitable candidates for developing high-performance geomaterials for a variety of geotechnical engineering applications [ 4 , 5 , 6 ]. Recent research involving the addition of recycled ELT-based products—mainly in the form of granulates, herein referred to as ground rubber (GR)—to low-grade clay soils has shown that the compacted soil-GR blend demonstrates excellent properties in terms of diminishing the soil’s swell–shrink volume change capacity, as well as its desiccation-induced cracking potential [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Moreover, the application of GR-based additives has been reported to greatly enhance the soil’s damping, which adds greatly to its seismic resistance [ 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Shear Strength Performance of Compacted Rubberized Clays Treated with Sodium Alginate Biopolymer

et al. 2021

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This study examines the potential use of sodium alginate (SA) biopolymer as an environmentally sustainable agent for the stabilization of rubberized soil blends prepared using a high plasticity clay soil and tire-derived ground rubber (GR). The experimental program consisted of uniaxial compression and scanning electron microscopy (SEM) tests; the former was performed on three soil–GR blends (with GR-to-soil mass ratios of 0%, 5% and 10%) compacted (and cured for 1, 4, 7 and 14 d) employing distilled water and three SA solutions—prepared at SA-to-water (mass-to-volume) dosage ratios of 5, 10 and 15 g/L—as the compaction liquid. For any given GR content, the greater the SA dosage and/or the longer the curing duration, the higher the uniaxial compressive strength (UCS), with only minor added benefits beyond seven days of curing. This behaviour was attributed to the formation and propagation of so-called “cationic bridges” (developed as a result of a “Ca2+/Mg2+ ⟷ Na+ cation exchange/substitution” process among the clay and SA components) between adjacent clay surfaces over time, inducing flocculation of the clay particles. This clay amending mechanism was further verified by means of representative SEM images. Finally, the addition of (and content increase in) GR—which translates to partially replacing the soil clay content with GR particles and hence reducing the number of available attraction sites for the SA molecules to form additional cationic bridges—was found to moderately offset the efficiency of SA treatment.

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“…Dai [15] used energy dispersive analysis of x-rays (EDAX) to analyze the composition of expansive soil and modified expansive soil with lime and concluded that the modification effect of lime modified expansive soil was better than that of fly ash modified expansive soil. Abbaspour et al [16] modified the expansive soil with the Waste Tire Textile Fibers (WTTFs). e mechanical properties of sodium bentonite containing WTTF were evaluated by a set of standard compactions, direct shear, unconfined compressive strength (UCS), CBR, and expansive consolidation tests.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Physical-Mechanical Properties of Expansive Soil Improved by Multiple Admixtures

Cai

Zeng

et al. 2021

Advances in Civil Engineering

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The treatment of expansive soil is always a difficult problem in engineering. Using coal gangue, fly ash, and other solid waste to treat expansive soil has gradually become a new way of energy saving and environmental protection. Most of the existing studies focus on using one or two kinds of admixtures to improve expansive soil, but there are few studies on improving expansive soil with multiple admixtures. In this paper, the expansion and shrinkage deformation and strength characteristics of expansive soil modified by coal gangue, fly ash, and lime are studied experimentally. Nine groups of different mixing schemes were designed through orthogonal tests, and the physical and mechanical properties of the improved expansive soil under different mixing ratios were tested. The sensitivity analysis of the test results was carried out to study the effect of each admixture on the improved expansive soil under different mixing ratios, and the optimal mix ratio under different conditions was obtained. The optimal mix ratio is 8% for coal gangue, 11% for fly ash, and 6% for lime. Further scanning electron microscopy (SEM) tests were carried out to analyze the microstructure of the improved expansive soil and explore the improvement mechanism of the multiadmixture. The results show that the optimal moisture content and the maximum dry density of the expansive soil with ash are decreased, and the properties of liquid plastic limit, free expansion rate, shear strength, and unconfined compressive strength of the expansive soil are improved obviously. Through the analysis of the comprehensive balance method, it is found that the content of lime has the greatest influence on the improvement effect of expansive soil, followed by that of coal gangue, and the least is that of fly ash. SEM structure analysis reveals that the particles of improved expansive soil are mainly aggregates, the soil structure is dense, particle agglomeration increases, and the overall structure is stronger. The research results can provide reference for the improvement of expansive soil with various admixtures and the resource utilization of coal gangue, fly ash, and other solid wastes.

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Strength and swelling properties of a waste tire textile fiber-reinforced expansive soil

Cited by 38 publications

References 53 publications

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Sustainable Reuse of Waste Tire Textile Fibers (WTTF) as Reinforcements

Improved Shear Strength Performance of Compacted Rubberized Clays Treated with Sodium Alginate Biopolymer

Experimental Study on Physical-Mechanical Properties of Expansive Soil Improved by Multiple Admixtures

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