Effect of natural fiber reinforcement on strength response of alkali activated binder treated expansive soil: Experimental investigation and reliability analysis

Syed, Mazhar; GuhaRay, Anasua

doi:10.1016/j.conbuildmat.2020.121743

Cited by 31 publications

(5 citation statements)

References 57 publications

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“…However, there is no way of knowing what chemical bonds are broken and produced in the process of MK alkalinization. Herein, the time correlation function (TCF) , is used to evaluate the stability of chemical bonds. The TCF of (non)covalent bonds is calculated by the following formula.…”

Section: Resultsmentioning

confidence: 99%

Molecular Insights into the Reaction Process of Alkali-Activated Metakaolin by Sodium Hydroxide

et al. 2022

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When metakaolin (MK) is alkalized with an alkaline activator, it depolymerizes under the action of the alkali. However, the process of MK alkalinization is still unrevealed. Here, we supplied a molecular insight into the process of MK alkalinization through reaction molecular dynamics (MD) simulation. The structure, dynamics, and process of MK alkalinization are systematically investigated. The results showed that the layered structure of MK was destroyed and the silicates in MK were dissolved by sodium hydroxide solution during the alkalinization reaction of MK. The aluminates in MK are not dissolved, indicating that aluminates are more stable than silicates. Moreover, the equilibrium structures of MK with H 2 O and MK with NaOH solution show that only when both sodium hydroxide and water are involved in the alkalinization reaction, the silicates in MK undergo depolymerization. Also, the observed final state of MK alkalinization can be recognized as the precursor of alkali-activated materials (AAMs).

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Section: Resultsmentioning

confidence: 99%

Molecular Insights into the Reaction Process of Alkali-Activated Metakaolin by Sodium Hydroxide

et al. 2022

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“…Their formulation was based on the authors' experience. A5: Experimental evaluation of environmental contamination aspects [35,101] A6: Collaboration between universities and governmental agencies for the development of applied research [110] A7: Verification of cost-benefits through quantitative financial methods [38,111] A8: Verification of cost-benefits through socio-environmental justifications [38] A9: Low implementation complexity [112,113] A10: Clear, concise, and easily accessible information on the advantages of new geotechnical materials compared to traditional construction methods [38,71,111] A11: Promotion of solutions suitable for the regional context [33,108] B B1: Development of materials more resistant to the effects of climate change [24,[114][115][116][117][118] B2: Development of materials that use waste as reinforcement or matrix [99,103,119,120] B3: Development of materials that propose decarbonization [38,40,121,122] B4: Life cycle analysis of materials and verification of carbon footprint [39,121] B5: Compatibility with the Sustainable Development Goals [24,[123][124][125] B6: Compatibility with the Nationally Determined Contributions [13,111] B7: Development of construction techniques that stimulate regional development [108,119,126] B8: Development of ...…”

Section: Rubbermentioning

confidence: 99%

Key Success Factors for the Practical Application of New Geomaterials

Alelvan,

Santos,

Pierozan

et al. 2023

Sustainability

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Geomaterials comprise naturally formed materials through geological processes, such as soils and rocks, or artificially processed materials, including mineral waste and geosynthetics. These materials find extensive use in geotechnical structures, such as slopes, dams, and pavements, among others. However, two issues commonly arise in earthworks: the materials available in the region do not meet the minimum engineering requirements, resulting in high transportation costs, and the exploitation of new deposits increases environmental impacts. Consequently, there is a need to develop stabilization and reinforcement techniques aimed at creating new geomaterials (NGs) to expand the range of local material applications. In this context, the present study evaluates the key success factors (KSFs) related to the application of NGs in geotechnical structures. The Delphi method was employed through a structured questionnaire developed after an extensive literature review. Brazilian experts from the public, private, and academic sectors were selected to identify the obstacles and potential pathways for the practical application of NGs. The outcomes of the study indicated that the lack of standardization, the complex behavior of geomaterials under varying conditions, as well as technical and economic limitations serve as barriers impeding the widespread adoption of NGs. Finally, a roadmap proposal was devised, encompassing a series of actions intended to facilitate the broader utilization of NGs.

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“…Chemical techniques are being used for expansive soil reinforcement and stabilization through application of fly ash [ 52 ], lime [ 53 ], geo-polymers [ 54 ], cement [ 55 ], and ground granulated blast furnace slag [ 56 ]. Furthermore, mechanical techniques have been proposed as a more sustainable solution for expansive soil reinforcement based on randomly distributed synthetic fibers such as polypropylene (PP) [ 57 ], polyester [ 58 ], polyvinyl alcohol (PVA) [ 59 ], waste carpet [ 60 ], glass [ 61 ], and carbon [ 62 ]), as well as natural (biobased) fibers such as kenaf [ 63 ], corn husk [ 64 ], hemp [ 65 ], bagasse [ 66 ], sisal [ 67 ], and jute [ 68 ].…”

Section: Soil Compositementioning

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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Effect of natural fiber reinforcement on strength response of alkali activated binder treated expansive soil: Experimental investigation and reliability analysis

Cited by 31 publications

References 57 publications

Molecular Insights into the Reaction Process of Alkali-Activated Metakaolin by Sodium Hydroxide

Molecular Insights into the Reaction Process of Alkali-Activated Metakaolin by Sodium Hydroxide

Key Success Factors for the Practical Application of New Geomaterials

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

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