Material design and performance improvement of conductive asphalt concrete incorporating carbon fiber and iron tailings

Ullah, Shafi; Yang, Chunli; Cao, Liping; Wang, Peng; Chai, Qinggang; Li, Yuexiang; Wang, Lizhi; Zhang, Dong; Lushinga, Nonde; Zhang, Bingtao

doi:10.1016/j.conbuildmat.2021.124446

Cited by 33 publications

(24 citation statements)

References 51 publications

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“…45 It is well known that the addition of CF with TA together as conductive additive makes the asphalt concrete a smart and better structural material. 41 For this purpose, this study utilized 0.25% CF and TA in 1:3 by the weight of total aggregates in the mixture to produce electrically conductive self-sensing mixtures, as shown in Figure 1. The purpose of adding TA as a sustainable alternative to NA was to reduce the amount of CF, and enhance the electrical conductivity and mechanical strength of the asphalt concrete mixture.…”

Section: Raw Materialsmentioning

confidence: 99%

“…poured into the mixture, and blended for another 90 s at 140 C-160 C. Thirdly, filler was added to the mixture, and blended for additional 90 s at 140 C-160 C. Marshall samples were casted and compacted at 120 C-150 C with 75 blows on each face. 41…”

Section: Aggregates Gradation and Test Sample Preparationmentioning

confidence: 99%

“…The changes in electrical resistance during real-time loading (R t ) were considered the same as the changes in electrical resistivity, since the changes in resistance during real-time loading can be easily monitored, as shown in Figure 6. 41 Two parameters were used to explore the self-sensing response including FCR and stress sensitivity (SS). The FCR corresponds to the change in resistance (ΔR = R t À R 0 ) during loading relative to the initial resistance (R 0 ) of the mixture.…”

Section: Mechanical Properties and Electrical Resistivity Of Mixturementioning

confidence: 99%

“…The resistance-change response is considered as a self-sensing response of asphalt concrete, and depends on the type and mode of load applications. 41 Previous investigations have explored the self-strain sensing response of asphalt concrete made of CF and GP under tensile loading. 34,35,42 Their research findings revealed that asphalt mixture self-monitors the gradual increase in damage by changing its resistance and develops an early crack warning function.…”

Section: Introductionmentioning

confidence: 99%

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Self‐stress and deformation sensing of electrically conductive asphalt concrete incorporating carbon fiber and iron tailings

Ullah

Wan

Yang

et al. 2022

Structural Contr & Hlth

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Summary Asphalt road gradually deteriorates in serviceability with insignificant damage. The deterioration begins with microcracks and continues until structural failure. To facilitate early damage prediction, this study proposes a structural self‐sensing technique based on the piezo‐resistive behavior of conductive asphalt concrete. To this end, conventional asphalt mixtures were modified into self‐sensing mixtures by adding conductive carbon fiber (CF) and iron tailings aggregates (TA) as alternatives for natural aggregates (NA). The self‐sensing response was evaluated by correlating fractional changes in electrical resistance (FCR) with the deformation of mixture within and beyond the elastic regime in response to varying stress amplitudes under fatigue cyclic compressive loading. From the results, it can be seen that the mixture exhibits sufficient mechanical strength and low resistivity to achieve a self‐sensing response. Furthermore, the self‐sensing response varies significantly with the stress amplitude. The mixture exhibits sufficient sensitivity to the compaction and deformation within the elastic regime by reversibly decreasing its electrical resistance at low‐stress, manifested as increase in negative (−) FCR. The −FCR reversibly decreases, reflecting initiation of microcracks due to increased deformation within the elastic regime at medium‐stress. However, irreversible FCR is observed at high‐stress due to increase in deformation beyond the elastic regime, which leads to fracture. After fracture, the mixture does not show sensitivity to stress and deformation owing to the cracking of internal conductive network. In conclusion, the mixture provides early damage prediction as sensitive damage sensor in the elastic regime and enables real‐time structural health monitoring (SHM) of asphalt pavements.

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Section: Raw Materialsmentioning

confidence: 99%

Section: Aggregates Gradation and Test Sample Preparationmentioning

confidence: 99%

Section: Mechanical Properties and Electrical Resistivity Of Mixturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Self‐stress and deformation sensing of electrically conductive asphalt concrete incorporating carbon fiber and iron tailings

Ullah

Wan

Yang

et al. 2022

Structural Contr & Hlth

Self Cite

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“…A large number of tailings are accumulated in the tailings pond, which not only occupies a large amount of land and pollutes the surface environment but is also one of the major hazard sources, which seriously threatens the surrounding environment and safety. At present, tailings are mainly used for mine backfilling (Liu et al, 2017;Qi and Fourie, 2019;Wu et al, 2014), soil reclamation, preparation of building materials (Ullah et al, 2021), and preparation of new functional materials such as molecular sieve (Zhang et al, 2019;Yang et al, 2021). With the continuous development of beneficiation technology, tailings have become finer and finer.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Sulfate Wetting–Drying Cycle of Metal Tailings Powder Concrete

Zou

Liu

et al. 2022

Front. Mater.

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In order to absorb a large amount of metal tailings powder and alleviate the shortage of mineral admixture in concrete, metal tailings powder can form a compound admixture with slag powder to prepare concrete. The sulfate wetting–drying cycle test of concrete with different contents of metal tailings powder was carried out to study the action law of metal tailings powder on the sulfate corrosion resistance of concrete. Scanning electron microscope, XRD, and nuclear magnetic resonance microscopic tests were used to reveal the deterioration mechanism of metal tailings powder concrete eroded by sulfate. The results show that proper addition of metal tailings powder can increase the sulfate corrosion resistance of C50 concrete. When the ratio of metal tailings powder to slag powder is 3:7 and 5:5, the sulfate corrosion resistance grade can reach KS180. There is a strong linear relationship between the relative ultrasonic velocity factor and relative compressive strength factor. The sulfate failure mechanism of metal tailings powder concrete is mainly the internal formation of corrosion products ettringite and gypsum. The introduction of metal tailings powder can reduce the alkalinity of concrete and improve the pore structure, thus improving the sulfate corrosion resistance of concrete.

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Conductive behavior of engineered geopolymer composite with addition of carbon fiber and nano-carbon black

Han

Pan

Wang

et al. 2023

Ceramics International

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Material design and performance improvement of conductive asphalt concrete incorporating carbon fiber and iron tailings

Cited by 33 publications

References 51 publications

Self‐stress and deformation sensing of electrically conductive asphalt concrete incorporating carbon fiber and iron tailings

Self‐stress and deformation sensing of electrically conductive asphalt concrete incorporating carbon fiber and iron tailings

Experimental Study on Sulfate Wetting–Drying Cycle of Metal Tailings Powder Concrete

Conductive behavior of engineered geopolymer composite with addition of carbon fiber and nano-carbon black

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