State of the Art on Sensing Capability of Poorly or Nonconductive Matrixes with a Special Focus on Portland Cement–Based Materials

Buasiri, Thanyarat; Habermehl-Cwirzen, Karin; Ćwirzeń, Andrzej

doi:10.1061/(asce)mt.1943-5533.0002901

Cited by 7 publications

(5 citation statements)

References 89 publications

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“…Cement-based conductive composite can be used as a sensor, which can be poured synchronously with concrete, has good compatibility with concrete structure and deteriorates synchronously [ 6 , 7 , 8 ]. It overcomes the shortcomings of other sensors such as high installation requirements, poor compatibility and poor performance-matching, and better reflects the degree and process of structural degradation [ 9 , 10 , 11 ]. When necessary, it can also be directly used as a structural component to monitor the performance of the entire component without dead angles.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Freeze–Thaw Action on the Electrical Conductivity and Sensing Properties of Graphene-Based Cement Composites

Chen

Jiang

et al. 2023

Materials

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Graphene can effectively improve the mechanical and electrical properties of cement-based materials due to its excellent tensile strength, thermal conductivity and electrical conductivity. In this paper, the effects of freeze–thaw on the conductivity and sensing properties of graphene-based cement materials were investigated. After the preparation of graphene-based cement materials, they were subjected to different times of freeze–thaw action. The experiments were designed to analyze the influence of freeze–thaw on the electrical conductivity, humidity sensitivity, thermosensitivity and pressure sensitivity of graphene-based cement composites. The results show that the influence of freeze–thaw on the electrical conductivity of graphene is mainly manifested in the influence on the resistivity and the extension of the polarization time, and the influence on the percolation transition zone is small. After freeze–thaw, the polarization time of the specimen decreases with the increase of the relative water content. The temperature has a great influence on the polarization effect of graphene-based cement composites and the composites with graphene content of the zone B still show satisfactory pressure-sensitive property after freeze–thaw.

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Section: Introductionmentioning

confidence: 99%

Study on the Effect of Freeze–Thaw Action on the Electrical Conductivity and Sensing Properties of Graphene-Based Cement Composites

Chen

Jiang

et al. 2023

Materials

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“…Some structures even requires a permanent and automated monitoring systems to avoid any unexpected events that might jeopardize its integrity [1]. This can be essentially achieved by using either non-intrinsic sensors or intrinsic sensors [2][3][4][5]. If the stresses in the structural element is known, its life expectancy can be easily calculated using the simple beam theory [6].…”

Section: Introductionmentioning

confidence: 99%

“…While the intrinsic sensors are based on enhancing the self-sensing capabilities of the material. Sensors rely on electrical circuits to report the changes that occur to the position and/or the strain of the structural element [4]. Hence, all the parts of this electrical circuit should have precisely defined electrical properties, such as: conductivity, piezoresistivity, and capacitance.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers tried to enhance the electrical properties of the concrete to achieve the mentioned goal by utilizing different functional fillers, such as: steel fibers, carbon fibers, nickel powder, graphite powder, glass powder, carbon nanotubes (CNT), steel slag, and silica fume [10][11][12][13][14]. Good reviews about such studies can be found in the literature [4,[15][16][17][18][19]. However, utilizing the conductive fillers often faces the obstacle of the uniform distribution, which hinders its use for large scale structures [18].…”

Section: Introductionmentioning

confidence: 99%

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Electromechanical properties of self-sensing cement pastes polarized while fresh

Al-Qaralleh¹

2023

J Appl Eng Science

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This work investigates the bulk resistivity, and the stress-strain relationship of polarized cement paste as indicators of its electromechanical properties. The polarizing of the cement paste specimens was achieved by applying a uniform direct current (DC) electric field through the fresh cement paste for 24 hours. A total of 24 specimens were prepared for this study, 7 of them were not cured under the effect of the DC electric field to serve as reference. 3 different electrical field values were utilized in this experiment, namely: 100 V.m-1, 200 V.m-1, and 500 V.m-1. 2 types of water were used for mixing the cement paste, namely: tap (T), and deionized (DI). The bulk resistivity values were measured in the direction parallel to the polarization, and the two other directions perpendicular to the polarization. The T water specimens were tested under uniaxial compression on the axis of polarization. The results show that the bulk resistivity of the specimens was increased as the curing electrical field increased. Mixing with T water also increased the bulk resistivity when compared to mixing with DI water. Polarizing the fresh cement paste has a significant effect on its mechanical properties such that the ultimate compressive strength decreased by 50%, and the failure strain increased by 500%. In addition, the polarized specimens showed some changes in its morphology when compared with the reference.

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“…Because of its bonding action, SFRC is a practical option for maintaining tunnel stability in rock that has been fragmented [10]. SFRC linings are now being used as main support and permanent lining in tunnels [11]. A single layer of SFRC lining of a certain thickness is adequate to guarantee tunnel stability under optimal geological conditions [12].…”

Section: Introductionmentioning

confidence: 99%

Investigating Fibre Reinforced Concrete's Strength, Flexibility, and Longevity

Negi¹

2022

MSEA

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There have been several difficulties with mesh-reinforced lining constructions because to the complex tunnelling circumstances and varying technical requirements. Thereafter, steel fiber reinforced concrete (SFRC) is promoted as a trustworthy replacement for mesh-reinforced linings. In this study, we take a look at the components and typical characteristics of SFRC. Cracks or structural failures in mesh-reinforced linings are summarized, and contemporary difficulties in this field are discussed. Tunnel linings made from SFRC are discussed, along with the benefits of doing so. In addition, the performance of SFRC in tunnel lining applications is reviewed, along with various design considerations and practical instances. The evaluation found that SFRC lining had a favourable impact on limiting rock movement, decreasing lining pressure, and ensuring both global and local support structure integrity. The study provides useful information for advancing the use of SFRC

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State of the Art on Sensing Capability of Poorly or Nonconductive Matrixes with a Special Focus on Portland Cement–Based Materials

Cited by 7 publications

References 89 publications

Study on the Effect of Freeze–Thaw Action on the Electrical Conductivity and Sensing Properties of Graphene-Based Cement Composites

Study on the Effect of Freeze–Thaw Action on the Electrical Conductivity and Sensing Properties of Graphene-Based Cement Composites

Electromechanical properties of self-sensing cement pastes polarized while fresh

Investigating Fibre Reinforced Concrete's Strength, Flexibility, and Longevity

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