Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression

Mizerová, Cecílie; Kusák, Ivo; Topolář, Libor; Schmid, Pavel; Rovnanı́k, Pavel

doi:10.3390/ma14164350

Cited by 12 publications

(5 citation statements)

References 25 publications

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“…The piezoresistivity of the inorganic polymer was significantly higher than that reported in prior studies of inorganic polymers under cyclic loading. Inorganic polymers without conductive additives have FCR below 1% when measured with direct current under cyclic loading. , The use of alternating current increases the detectable FCR by a factor of 10, opening the door to future use of inorganic polymers as self-sensing materials. Portland cement is known to have negligible FCR under cyclic loading conditions …”

Section: Resultsmentioning

confidence: 99%

“…Generally, they exhibit high mechanical properties and are considered a low-cost and environmentally friendly alternative to Portland cement because they can be synthesized from industrial byproducts that are rich in aluminum and silicon oxides, such as blast furnace slag and coal fly ash . Alkali-activated inorganic polymers have been investigated as a matrix material for self-sensing composites with conductive additives. − However, their intrinsic piezoresistivity was found to be negligible with conventional measurement methods.…”

Section: Introductionmentioning

confidence: 99%

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Combined Experimental and Computational Prediction of the Piezoresistivity of Alkali-Activated Inorganic Polymers

et al. 2022

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The incorporation of smart building materials into construction will improve the working life of structures and infrastructure around the globe. Unfortunately, conventional smart building materials are cost-prohibitive because of the self-sensing additives required. Alkali-activated inorganic polymers are a promising low-cost and environmentally friendly alternative that exhibit intrinsic self-sensing properties, without the need for self-sensing additives. An improved methodology has been developed to quantify the self-sensing piezoresistivity of these materials. Experimental measurements reveal a strong intrinsic piezoresistivity up to 12%. The results agree with a first-principles model of the theoretical piezoresistivity of an alkali-activated inorganic polymer from the quantum mechanical perturbation theory. This first-of-its-kind computation provides a mechanistic explanation for the origin of intrinsic piezoresistivity in inorganic polymers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combined Experimental and Computational Prediction of the Piezoresistivity of Alkali-Activated Inorganic Polymers

et al. 2022

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“…With regard to geopolymer concretes, at the moment in scientific publications, topics related to the piezo-resistant behavior of geopolymer concretes under various deformations and the development of technologies that allow using this factor for the continuous monitoring of the state of building structures are gaining popularity. The authors of [ 200 ] carried out a work devoted to the study of the piezoresistance behavior of a geopolymer material based on FA with the addition of carbon black during compression. Prototypes were made in the form of cubes with the addition of carbon black in the amount of 0.5%, 1% and 2%, in which four copper electrodes were embedded.…”

Section: Modern Trends and Innovations In The Field Of Research Of Ge...mentioning

confidence: 99%

Analytical Review of Geopolymer Concrete: Retrospective and Current Issues

Meskhi,

Beskopylny,

Stel’makh

et al. 2023

Materials

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The concept of sustainable development provides for the search for environmentally friendly alternatives to traditional materials and technologies that would reduce the amount of CO2 emissions into the atmosphere, do not pollute the environment, and reduce energy costs and the cost of production processes. These technologies include the production of geopolymer concretes. The purpose of the study was a detailed in-depth analytical review of studies of the processes of structure formation and properties of geopolymer concretes in retrospect and the current state of the issue. Geopolymer concrete is a suitable, environmentally friendly and sustainable alternative to concrete based on ordinary Portland cement (OPC) with higher strength and deformation properties due to its more stable and denser aluminosilicate spatial microstructure. The properties and durability of geopolymer concretes depend on the composition of the mixture and the proportions of its components. A review of the mechanisms of structure formation, the main directions for the selection of compositions and processes of polymerization of geopolymer concretes has been made. The technologies of combined selection of the composition of geopolymer concrete, production of nanomodified geopolymer concrete, 3D printing of building structures from geopolymer concrete, and monitoring the state of structures using self-sensitive geopolymer concrete are considered. Geopolymer concrete with the optimal ratio of activator and binder has the best properties. Geopolymer concretes with partial replacement of OPC with aluminosilicate binder have a denser and more compact microstructure due to the formation of a large amount of calcium silicate hydrate, which provides improved strength, durability, less shrinkage, porosity and water absorption. An assessment of the potential reduction in greenhouse gas emissions from the production of geopolymer concrete compared to the production of OPC has been made. The potential of using geopolymer concretes in construction practice is assessed in detail.

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“…Fourier-transform infrared (FTIR) analysis revealed that the original GO undergoes a reduction in the course of geopolymers' processing. Cecílie Mizerová et al (7) show that the examination of compressive strain and acoustic emission data revealed that fly ash geopolymer lacks the necessary rigidity. Under loading conditions, it experiences permanent deformations, attributed in part to the creation of micro defects in the binder's structure and partly to the transition from quasi-brittle to more ductile properties with the introduction of carbon black.…”

Section: Introductionmentioning

confidence: 99%

“…Its inclusion in the blend not only enhances the sustainability of the research but also significantly contributes to conferring self-sensing capabilities upon the concrete. (12,13) Type F fly ash encompasses diverse chemical elements capable of influencing the electrical properties of concrete, (7) thereby establishing its indispensability in the development of self-sensing abilities. The incorporation of Reclaimed Salud, Ciencia y Tecnología -Serie de Conferencias.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Concrete Pavement Incorporating RAP and Fly Ash with Self-Sensing Properties

Refat,

Al-Dahawi,

Baqir

2024

Salud, Ciencia y Tecnología - Serie de Conferencias

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This research focuses on addressing the problem of utilizing high-value sustainable materials in the creation of self-sensing concrete pavement. The study specifically explores the incorporation of reclaimed asphalt pavement (RAP), fly ash, and silica fume in a single mix design to achieve sustainability objectives. In the previous work by the authors, laboratory experiments were conducted to determine the optimal proportions of RAP, fly ash, and silica fume, with a focus on achieving desired mechanical properties. Mechanical tests, encompassing compressive strength, flexural strength, and indirect tensile strength, were conducted within this framework to assess the performance of the concrete mixture. The selected concrete mix in this study incorporated 40% RAP as a replacement for virgin aggregate, a fly ash-to-cement ratio of 0.8, and the addition of silica fume at 8% relative to the weight of cementitious materials. Structural health and durability were monitored in real time by embedding two electrodes within the concrete matrix. The results highlighted the significant impact of adding RAP, fly ash, and silica fume on the mechanical properties of the hardened concrete. The optimized combination design indicated improved strength and self-sensing behavior, which was related to the beneficial impacts of silica fume and fly ash on mechanical and self-sensing capabilities. This research contributes to the advancement of sustainable and intelligent infrastructure by demonstrating the feasibility of integrating recycled materials and self-sensing technology into concrete pavement construction. Additionally, the study extended its investigation to evaluate the performance of sustainable concrete under dynamic loads using ANSYS analysis. The investigation, which was performed on a structure with dimensions of 21 meters in length and 3 meters in width, observed that the use of sustainable materials improved the mechanical behavior of the structure under moving loads.

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Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression

Cited by 12 publications

References 25 publications

Combined Experimental and Computational Prediction of the Piezoresistivity of Alkali-Activated Inorganic Polymers

Combined Experimental and Computational Prediction of the Piezoresistivity of Alkali-Activated Inorganic Polymers

Analytical Review of Geopolymer Concrete: Retrospective and Current Issues

Sustainable Concrete Pavement Incorporating RAP and Fly Ash with Self-Sensing Properties

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