Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring
Abstract
:1. Introduction
2. Preparation and Encapsulation of Smart Material-Based Strain Sensors
2.1. Preparation of Carbon Nanotube/Epoxy Resin (CNT/EP) Composites
2.2. Encapsulating MWCNT/EP Composite Rod by Epoxy for Manufacturing Strain Sensing Element
3. Strain–Resistance Response Characteristics of the Self-Developed I-Shaped Sensor
3.1. Embedding Process of Sensor in Asphalt Concrete Slab
3.2. Strain Monitoring Effectiveness of the Sensor in Asphalt Concrete
3.3. Application of Self-Developed Sensor in Practical Pavement Interlayer Strain Monitoring
4. Conclusions
- The self-developed embedded strain sensor can detect the strain changes in the asphalt pavement structure. When it is subjected to an external load, the conductive path is changed accordingly in conductive MWCNT/EP composite material, causing changes in the resistance of the sensor.
- The strain monitoring effectiveness test showed that the sensor has a high sensitivity to strain, and the resistance value of the sensor is linearly related to the changes in the external strain.
- By comparing with the commercial strain sensor, the self-developed embedded strain sensor has the advantage of deformation coordination and consistency with the road structure because of the encapsulating materials and packaging techniques studied in this paper, which can help to improve the monitoring accuracy.
- The embedding of the sensor in asphalt concrete slab and its application in practical pavement both showed that the sensor could effectively survive after being subjected to high temperature and heavy pressure during asphalt pavement compaction, which verified the feasibility of a self-developed sensor in asphalt pavement strain monitoring.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Ma, C.; Xin, X.; Zhang, N.; Wang, J.; Wang, C.; Liang, M.; Zhang, Y.; Yao, Z. Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring. Coatings 2023, 13, 390. https://doi.org/10.3390/coatings13020390
Ma C, Xin X, Zhang N, Wang J, Wang C, Liang M, Zhang Y, Yao Z. Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring. Coatings. 2023; 13(2):390. https://doi.org/10.3390/coatings13020390
Chicago/Turabian StyleMa, Chuanyi, Xue Xin, Ning Zhang, Jianjiang Wang, Chuan Wang, Ming Liang, Yunfeng Zhang, and Zhanyong Yao. 2023. "Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring" Coatings 13, no. 2: 390. https://doi.org/10.3390/coatings13020390
APA StyleMa, C., Xin, X., Zhang, N., Wang, J., Wang, C., Liang, M., Zhang, Y., & Yao, Z. (2023). Encapsulation for Sensing Element and Its Application in Asphalt Road Monitoring. Coatings, 13(2), 390. https://doi.org/10.3390/coatings13020390