Effect of Shredded Rubber on Undrained Shear Strength of Fine-Grained Sands

Ghadr, Soheil; Javan, Armin

doi:10.1007/s40515-020-00106-x

Cited by 8 publications

(3 citation statements)

References 46 publications

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“…However, it is found that SS samples produced larger ϕ CS , implying that ϕ CS increased with decreasing median grain size ( D 50 ) of the test sample. A similar observation was made by Kokusho et al ( 2004 ) and Ghadr and Javan ( 2020 ) in undrained triaxial tests on sea, river, and typical quartz sands; the measured ϕ CS values for river and sea sands were markedly higher. In addition to the critical state angle of frictions, the frictional angles based on the Mohr–Coulomb envelop, ϕ MC , were also estimated and provided for further engineering applications, as shown in Table 4 .…”

Section: Resultssupporting

confidence: 87%

Mechanical behavior of sands reinforced with shredded face masks

Ghadr

Chen

Liu

et al. 2022

Bull Eng Geol Environ

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The rapid response to the COVID-19 pandemic has resulted in increased municipal waste in the form of used face masks (FMs), which pose a global threat to the environment. To mitigate this, the study explores the applicability of shredded FMs as alternative reinforcing material in sands. Laboratory-grade Ottawa sand and naturally collected sea sand are adopted as the base sands for testing. The primary physical properties of the base materials and the FMs are first examined, and the soil particles are imaged via scanning electron microscopy. Thirty consolidated undrained (CU) triaxial compression tests were conducted to evaluate the effects of the weight fraction of FM, FM length, and the initial effective mean stress on the undrained shear strength parameters of the sands. The experimental results proved that FM inclusion can lead to a substantial improvement in the undrained shear strength of the sands; however, such improvement was sensitive to the initial effective mean stress, with higher undrained shear strength gains associated with lower initial effective mean stress. For a given FM content, the critical state ratio and angle of friction at the critical state increased with the FM length. Finally, the results revealed that FM-reinforced sands exhibit dilative and strain-hardening behaviors.

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Section: Resultssupporting

confidence: 87%

Mechanical behavior of sands reinforced with shredded face masks

Ghadr

Chen

Liu

et al. 2022

Bull Eng Geol Environ

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“…According to ASTM D6270-20 [96], scrap tires are classified into granulated tires (dimensions from 425 μm to 12 mm), tire chips (dimensions from 12 to 50 mm), and tire shreds (dimensions from 50 to 305 mm). Many studies have investigated the performance of diverse types of soils mixed with waste tires of dissimilar sizes, which have confirmed that waste tire has potential as an alternative material in geotechnical engineering applications [94,95,[97][98][99][100].…”

Section: Waste Tirementioning

confidence: 99%

Reutilization of solid wastes to improve the hydromechanical and mechanical behaviors of soils — a state-of-the-art review

Liu

Hung

2023

Sustain Environ Res

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The rapid urbanization, industrialization, and population growth have led to a considerable rise in solid waste production, highlighting the need for efficient solid waste management and recycling methods. To address the challenge of solid waste production, an alternative solution is to repurpose it in geotechnical engineering. This offers promising benefits as solid waste exhibits various mechanisms that can improve soil's hydromechanical and mechanical behaviors. This review aims to comprehensively analyze the effects and potential application of various solid waste types to stabilize and reinforce soil. The impacts and research trends of industrial waste, such as fly ash, red mud, ground granulated blast-furnace slag, and construction and demolition waste, as well as agricultural and municipal solid wastes, including rice husk ash, press mud, used waste tires, and face masks, on soil properties were identified. The findings contribute to a better understanding of the potential of solid waste as a sustainable and cost-effective solution for improving soil quality, highlighting new research themes in this area. A wide range of innovative methods to stabilize and reinforce soil have also been proposed; however, ingenious and effective containment techniques, as well as addressing the potential impacts of climate change on stabilized and reinforced soils (SRS), still need to be developed for robust field applications. This state-of-the-art review offers useful insights into the reutilization of solid wastes as a promising alternative for improving the hydromechanical and mechanical behaviors of SRS.

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“…Research involving the blending of sand-sized (0.075-4.75 mm) TDA materials (e.g., powder, crumbs, buffings, and fibers) with fine-grained soils, particularly those containing active clay minerals (such as montmorillonite), has confirmed their suitability to restrict the moisture susceptibility of such soils; providing major reductions in the soils' shrink-swell volume changes capacity and desiccation-induced cracking potential, with the achieved improvements being generally in favor of higher TDA contents (Trouzine et al 2012;Signes et al 2016;Soltani et al 2019a), larger TDA particle sizes (Srivastava et al 2014;Soltani et al 2020), and/or more elongated TDA shapes (Soltani et al 2019b;. Moreover, because of their higher deformability and lower stiffness compared to the soil solids (or soil agglomerations), the blending of TDA materials with soils can be employed to achieve any desired balance between the strength/stiffness and deformability parameters of the soil-TDA mixture; this being attainable for a given soil type by optimizing the TDA content and/or its particle size/shape (Lee et al 2007;Mohammadinia et al 2018;Ghadr and Javan 2020). In terms of shear strength performance, the compacted fine-grained soil-TDA mixture prepared with TDA-to-soil dry mass ratios of up to 10% has been reported to provide small improvements (e.g., Akbulut et al 2007;Soltani et al 2019bSoltani et al , 2020Yadav and Tiwari 2018;Akbarimehr et al 2020), postulated as attributed to arching effects between the TDA inclusions embedded within the soil-TDA agglomerations (Soltani et al 2021a).…”

Section: Introductionmentioning

confidence: 99%

Predicting the Compactability of Artificially Cemented Fine-Grained Soils Blended with Waste-Tire-Derived Aggregates

Soltani

Nguyen

O’Kelly

et al. 2022

Transp. Infrastruct. Geotech.

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This study investigates the possibility of extending the specific gravity ratio (SGR) modeling framework, originally developed for predicting the compaction properties of unamended fine-grained soils (with no binder) blended with tirederived aggregates (TDAs), to artificially cemented soil-TDA blends. This was achieved by performing comprehensive statistical analyses on a large and diverse database of 87 fine-grained soil-binder-TDA compaction tests, covering a wide range of soil plasticity and including a variety of chemical binders (cement, lime, fly ash, slag, and liquid polymers) and sand-sized (0.075-4.75 mm) TDA products. The optimum water content (OWC) and maximum dry unit weight (MDD) for any fine-grained soil-binder-TDA blend (constant binder type and content) can be expressed as functions of the OWC and MDD measured for the soilbinder mixture (with no TDA), along with the soil-binder (SB) to soil-binder-TDA (SBT) SGR, as w SBT opt = w SB opt (SGR) M and SBT dmax = SB dmax (SGR) D , respectively. It was demonstrated that reliable predictions (across different fine-grained soils, binders, TDA particle sizes/shapes, and compaction energy levels) can be achieved by adopting the same unique reduction rate parameters of β M = − 0.967 and β D = − 0.509 used for non-cemented soil-TDA mixtures. Attempts were also made to identify causal links between these reduction rate parameters and basic soil properties. It was shown that β D can be expressed as a linear-log function of soil activity. The 95% lower and upper (water content) agreement limits between the predicted and measured OWC values were obtained as − 1.70% and + 2.01%, both of which can be deemed acceptable for practical applications (e.g., preliminary soil-binder-TDA mixture-design evaluations). For the MDD predictions employing soil activity, these agreement limits were calculated as − 0.50 and + 0.54 kN/m 3 ; these small MDD limits are also deemed acceptable for practical applications. Extended author information available on the last page of the article Keywords Artificially cemented fine-grained soil • Tire-derived aggregate • Compaction • Optimum water content • Maximum dry unit weight • Specific gravity ratio • Soil activity Abbreviations AS Australian Standard ASTM American Society for Testing and Materials BA Bland-Altman (plot/method) BS British Standard CE Clay with extremely high plasticity CEL Compaction energy level CH Clay with high plasticity CI Clay with intermediate plasticity CL Clay with low plasticity CV Clay with very high plasticity FA C Class C fly ash GGBFS Ground-granulated blast-furnace slag HL Hydrated lime MDD Maximum dry unit weight ME Silt with extremely high plasticity MH Silt with high plasticity MI Silt with intermediate plasticity ML Silt with low plasticity MP Modified Proctor (compaction) MV Silt with very high plasticity OPC Ordinary Portland cement OWC Optimum water content PAM Polyacrylamide (i.e., an anionic synthetic polymer) PC II Portland cement type II S Soil (fine-grained) SA Sodium alginate (i.e., an anionic...

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Effect of Shredded Rubber on Undrained Shear Strength of Fine-Grained Sands

Cited by 8 publications

References 46 publications

Mechanical behavior of sands reinforced with shredded face masks

Mechanical behavior of sands reinforced with shredded face masks

Reutilization of solid wastes to improve the hydromechanical and mechanical behaviors of soils — a state-of-the-art review

Predicting the Compactability of Artificially Cemented Fine-Grained Soils Blended with Waste-Tire-Derived Aggregates

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