Electrically conductive behaviors and mechanisms of short-cut super-fine stainless wire reinforced reactive powder concrete

Dong, Sufen; Han, Baoguo; Ou, Jinping; Li, Zhen; Han, Linyang; Yu, Xun

doi:10.1016/j.cemconcomp.2016.05.022

Cited by 131 publications

(48 citation statements)

References 46 publications

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“…It is also noted that SSWs have thermal expansion coefficient similar to that of concrete matrix and high tensile strength. Moreover, SSWs have good dispersion in concrete and can form widely distributed strengthening and toughening network at low content [18][19][20][21]. The compactness improvement of concrete matrix caused by SSWs can effectively inhibit the generation of cracks.…”

Section: Introductionmentioning

confidence: 99%

Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Dong

Zhou

Ashour

et al. 2019

Cement and Concrete Composites

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As a type of excellent reinforcing filler, super-fine stainless wire (SSW) can form widely distributed network in reactive powder concrete (RPC) to transfer crack tip stresses as well as inhibit the initiation and propagation of cracks, leading to significant improvement of flexural toughness of RPC. In this paper, the flexural toughness of RPC beams and plates reinforced with 1% and 1.5% by vol. of SSWs was investigated, and its calculation model was established according to the composite material theory. Experimental results showed that the flexural toughness of unnotched beams fabricated with RPC containing 1.5% SSWs is 146.5% higher than that of control RPC without SSWs according to load-deflection relationships. The equivalent flexural strength of notched RPC beams is enhanced by 80.0% as SSW content increases from 1% to 1.5%. The limitation ability of SSWs on crack mouth opening can be used to evaluate the flexural toughness of composites. An addition of 1.5% SSWs leads to 201.9% increase of flexural toughness of RPC plates in accordance with load-deflection relationships. The calculation model based on the composite material theory can accurately describe the toughening effect of SSWs on RPC beams and plates. The enhancement of flexural toughness of RPC caused by SSWs is beneficial for improving the safety of structures as well as broadening the engineering applications of composites.

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Section: Introductionmentioning

confidence: 99%

Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Dong

Zhou

Ashour

et al. 2019

Cement and Concrete Composites

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“…Previous researches use different kind of fibers to study the self-sensing ability of concrete composites, such as Carbon Short Fiber [3], [4], Carbon Micro Fiber [1], [5]- [7], carbon nano fibers [8]- [11], steel fiber [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of self-sensing steel fiber reinforced concrete

2018

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The purpose of this communication is to develop a self-sensing cement composite capable of detecting stress variation in concrete by monitoring its electrical property. The relationship between the electrical properties, i.e. electrical resistance of steel fiber reinforced concrete, and stress under loading as part of self-sensing study is presented in here. Amorphous metallic fibers (AMF) with two different lengths i.e. 10 mm and 30 mm are used as concrete reinforcement at a content of 40 kg/m3. A water to cement ratio of 0.39 was adopted for the mix proportions. Natural fine and coarse siliceous aggregates were used for this research. Superplasticizer was used to achieve the target of workability. The two-probe method is used for measuring electrical properties on cylinder specimens with diameter 100 mm and height 200 mm. The influence of different parameters such as fiber length, frequency of power input, maximum stress and variation of potential input on the sensitivity of the sensing are investigated. The results indicate that the electrical resistance of the concrete decreases reversibly during loading and increases reversibly during unloading. Good sensitivity obtained for the mix using 30 mm AMF length indicates that the addition of this type of fiber into concrete can be suitable to produce a self-sensing cement composite.

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“…The ECG waveform shows the electrical activity of the heart and can detect heart irregularities. In order to fabricate sensor devices that transmit physiological signals, studies have explored the use of silver fibers [5], stainless steel [6], intrinsically conductive polymers [7], carbon-based nanomaterials [8], and other nanomaterials for use as electrodes [9,10]. These devices, based on the immobilization of silver nanoparticles, can sense physiological signals in the human body [11].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Flexible Electrodes and Immobilization of Silver Nanoparticles on Nanoscale Silicate Platelets to Form Highly Conductive Nanohybrid Films for Wearable Electronic Devices

et al. 2019

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This study investigated films with remarkably high electrical conductivity after they were easily prepared from organic/inorganic nanohybrid solutions containing an organic polymeric dispersant and two-dimensional nanoscale silicate platelets as the inorganic stabilizer dispersed with silver nanoparticles. Transmission electron microscopy shows that the production of silver nanoparticles synthesized by the in situ chemical reduction of AgNO3 in an aqueous solution by N,N-dimethylformamide results in an average silver nanoparticle diameter of circa 20 nm. Thin films of silver nanoparticles were prepared on a 1-μm-thick film with a low sheet resistance of 8.24 × 10−4 Ω/sq, achieved through the surface migration of silver nanoparticles and prepared by sintering at 300 °C to form an interconnected network. This was achieved with a silver nanoparticle content of 5 wt%, using nanoscale silicate platelets/polyoxyethylene-segmented polyimide/AgNO3 at a weight ratio of 1:10:35. During sintering, the color of the hybrid film changed from gold to milky white, suggesting the migration of silver nanoparticles and the formation of an interconnected network. The results show promise for the fabrication of novel silver-based electrocardiogram electrodes and a flexible wireless electrocardiogram measurement system for wearable electronics.

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Electrically conductive behaviors and mechanisms of short-cut super-fine stainless wire reinforced reactive powder concrete

Cited by 131 publications

References 46 publications

Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Flexural toughness and calculation model of super-fine stainless wire reinforced reactive powder concrete

Design and characterization of self-sensing steel fiber reinforced concrete

Facile Fabrication of Flexible Electrodes and Immobilization of Silver Nanoparticles on Nanoscale Silicate Platelets to Form Highly Conductive Nanohybrid Films for Wearable Electronic Devices

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