Integrated self-monitoring of carbon based textile reinforced concrete beams under repeated loading in the un-cracked region

Goldfeld, Yiska; Ben-Aarosh, S.; Rabinovitch, Oded; Quadflieg, Till; Gries, Thomas

doi:10.1016/j.carbon.2015.10.056

Cited by 42 publications

(30 citation statements)

References 22 publications

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“…The strain was measured using the static data acquisition system (DH3817) produced by Jiangsu Donghua testing Technology Co., Ltd. (Taizhou, China) The strain, pressure and voltage changes during loading (unloading) of the CNFPUC test block were recorded throughout the process. To eliminate the influence of CNFPUC internal voids on the pressure sensitivity, the cyclic loading can be applied to the specimen in advance in order to compact the voids [32].…”

Section: Pressure Sensitive Testmentioning

confidence: 99%

Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement

2018

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The sensitivity of carbon nanofiber polyurethane cement (CNFPUC) was evaluated to determine whether the cement can act as an intelligent reinforcement material. The percolation thresholds at different polymer-to-cement ratios were determined through experimentation. Taking a specific carbon nanofiber (CNF) content of the percolation zone, several CNFPUC mixtures with different poly-ash ratios and silica fume contents were made. They were then sampled from the mixture and poured into a hexahedron CNFPUC test block; the coefficient of variation of resistance and the piezoresistive characteristics under axial load were examined and the blocks were examined by scanning electron microscope. The sensitivity of the CNFPUC mixture was evaluated via the resistance variation coefficient of a sample hexahedron. For different CNF dosages, the critical value of the variation coefficient was used to assess the sensitivity characteristic by fitting the conic curve. These findings may provide a novel and simple method for determining the sensitivity of CNFPUC mixtures.

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Section: Pressure Sensitive Testmentioning

confidence: 99%

Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement

2018

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“…It was shown that the developed sensors are compatible with the weaving process and can form a network of sensors inside the reinforcement capable of following the deformation patterns of the reinforcement and mapping its stress-strain history. Goldfeld et al 24 investigated the sensing characteristics of the carbon tows both in tension and in compression using carbon-based textile-reinforced concrete beams. In four-point bending test of concrete beams, the lower and upper textile layers were tensed and compressed, respectively.…”

Section: Smart Textiles For Shmmentioning

confidence: 99%

Carbon rovings as strain sensors for structural health monitoring of engineering materials and structures

Quadflieg

Stolyarov

Gries

2016

The Journal of Strain Analysis for Engineering Design

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A prospective method for structural health monitoring of engineering materials and structures is based on embedded strain sensors in the form of electrically conductive carbon rovings. This article presents the results of the application of carbon rovings and the development of flexible textile fabrics based on these rovings for measuring the deformation in engineering materials, including concrete and polymer-and cement-based composites. The possibility of using carbon rovings as a strain sensor is demonstrated via measurements in tensile and four-point bending tests. The experimental setups and methods for measuring the electrical resistance of carbon roving as a function of strain in the roving, concrete, and composites are described. A good correlation has been found between the electrical resistance-strain curve of the carbon roving (used as a calibration curve) and the measurements in the concrete and polymer composites from tensile tests. The difference in the character of the flexural behavior and the electrical signal in the carbon roving cement-based composite, affected by the stitch type and shape of the carbon roving cross section in textile fabric, was found through four-point bending tests.

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“…Furthermore, the mechanical strength of carbon fiber cloth is high. It has been widely used in the mechanical properties of reinforced composite materials [26] and the reinforcement of bridges [27]. In view of the excellent mechanical and electrothermal properties of carbon fiber cloth, Lim et al [28][29][30][31] added carbon fiber cloth directly to the concrete, and then heated concrete by electricity.…”

Section: Introductionmentioning

confidence: 99%

Durability and Electrical Conductivity of Carbon Fiber Cloth/Ethylene Propylene Diene Monomer Rubber Composite for Active Deicing and Snow Melting

et al. 2019

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To reduce the impact of road ice and snow disaster, it is necessary to adopt low energy consumption and efficient active deicing and snow melting methods. In this article, three functional components are combined into a conductive ethylene propylene diene monomer (EPDM) rubber composite material with good interface bonding. Among them, the mechanical and electrical properties of the composite material are enhanced by using carbon fiber cloth as a heating layer. EPDM rubber plays a mainly protective role. Further, aluminum silicate fiber cloth is used as a thermal insulation layer. The mechanical properties of EPDM rubber composites reinforced by carbon fiber cloth and the thermal behaviors of the composite material in high and low temperature environments were studied. The heat generation and heat transfer effect of the composite were analyzed by electrothermal tests. The results show that the conductive EPDM rubber composite material has good temperature durability, outstanding mechanical stability, and excellent heat production capacity. The feasibility of the material for road active deicing and snow melting is verified. It is a kind of electric heating deicing material with broad application prospects.

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Integrated self-monitoring of carbon based textile reinforced concrete beams under repeated loading in the un-cracked region

Cited by 42 publications

References 22 publications

Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement

Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement

Carbon rovings as strain sensors for structural health monitoring of engineering materials and structures

Durability and Electrical Conductivity of Carbon Fiber Cloth/Ethylene Propylene Diene Monomer Rubber Composite for Active Deicing and Snow Melting

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