Development of carbon nanofiber aggregate for concrete strain monitoring

Roberts, Rachel Howser; Mo, Y. L.

doi:10.1016/b978-1-78242-326-3.00002-6

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…A pressure sensor detects, monitors pressure, and converts the data into an electronic signal. A strain sensor can measure electrical/optical and other responses to strain in a material [33]. It can be said that the type of signal measured by this sensor is similar to the previous two sensors.…”

Section: A Data Collectionmentioning

confidence: 99%

Statistical Database of Human Motion Recognition Using Wearable IoT—A Review

et al. 2023

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Wearable sensors and the Internet of Things (IoT) will be two buzzwords that will be heard commonly in the coming decades. The combination of these two technologies soon will create a great revolution in applications that require motion recognition, such as health care, sports, and entertainment. The development of technology has made wearable sensors one of the most basic tools for human motion analysis. We believe that IoT is the most powerful complement to the use of wearable sensors in the analysis of human body motion. Using wearable IoT, all necessary human data will be collected and delivered via the Internet to the experts who can make accurate decisions about the type of activity, falling situations, freezing of gait (fog), and so on. In this article, the human motion analysis is presented in a chart and is divided into two parts: movement measurement and movement classification. However, this article focuses on movement classification that includes three subsections, gait analysis (GA), gesture recognition (GR), and human activity recognition (HAR), and is closely related to human motion recognition. In this article, our goal is to first acquaint the reader with the important steps required to classify the movement of the human body by wearable sensors and then by using tables to determine the most used algorithms and methods for each step. After briefly reviewing IoT concepts, directions for further research will be provided.

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Section: A Data Collectionmentioning

confidence: 99%

Statistical Database of Human Motion Recognition Using Wearable IoT—A Review

et al. 2023

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“…On the other hand, Chen and Liu [18] reported that the electrical resistance of the conductive concrete would increase in case of damage to the CF reinforced concrete. Roberts et al [19] reported that CFs added to concrete improve the compressive and tensile strength of concrete. In addition, they explained that the damage to the conductive concrete can be determined by the relationship between the voltage applied to the concrete and its electrical resistance.…”

Section: Introductionmentioning

confidence: 99%

Characterization of carbon fiber reinforced conductive mortars filled with recycled ferrochrome slag aggregates

Doğan

Dehghanpour²,

Subaşı

et al. 2022

Journal of Sustainable Construction Materials and Technologies

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Recently, it is known that carbon fiber, which is a conductive fiber, is used in different mixture designs and developing electrically conductive cementitious materials. However, the evaluation of ferrochrome as a recycled aggregate in the mixture of these special concretes has still not been investigated. In this study, electrically conductive mortars were produced by using 100% recycled ferrochrome aggregate with a particle size of less than 1 mm as filling material and using carbon fiber (CF) in 4 different ratios, 0%, 0.5%, 0.75% and 1%. 2, 14, 28, 90 and 180 days electrical resistivity properties of the obtained samples were investigated. In addition, 28-day compressive strength, flexural strength, dynamic resonance, ultrasonic pulse velocity (UPV), Leeb hardness, scanning electron microscope (SEM) and X-Ray Diffraction (XRD) tests were performed on all samples. The obtained results were compared with the literature and it was proved that ferrochrome can be used as a reasonable aggregate in conductive mortars.

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Study on the Effects of Carbon Fibers and Carbon nanofibers on Electrical Conductivity of Concrete

Wang

Bai

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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In order to study the effects of carbon fibers and carbon nanofibers on the electrical conductivity of concrete, we adopt the four-electrode method to measure the resistivity of concrete with different test voltages, different ages and different fiber content. The test results show that both carbon fibers and carbon nanofibers can significantly reduce the electrical resistivity of concrete. When carbon fiber content and carbon nanofiber content are same, the resistivity of carbon fiber reinforced concrete (CFRC) is lower than that of carbon nanofiber reinforced concrete (CNFRC). The resistivity of CFRC and CNFRC can decrease with the increase of the test voltage, increase with the development of the concrete, and decrease with the increase of the fiber content. For concrete with an age of 28 days, CFRC has the largest decrease in resistivity when the carbon fiber content is between 0.2% and 0.3%, and the resistivity of CNFRC drops biggest when the carbon nanofiber content is between 0.1% and 0.3%.

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Development of carbon nanofiber aggregate for concrete strain monitoring

Cited by 4 publications

References 30 publications

Statistical Database of Human Motion Recognition Using Wearable IoT—A Review

Statistical Database of Human Motion Recognition Using Wearable IoT—A Review

Characterization of carbon fiber reinforced conductive mortars filled with recycled ferrochrome slag aggregates

Study on the Effects of Carbon Fibers and Carbon nanofibers on Electrical Conductivity of Concrete

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