Damage Detection of Carbon Nanotube Cementitious Composites Using Thermal and Electrical Resistance Properties

Lee, Heeyoung; Yu, Wonjun; Chung, Wonseok

doi:10.3390/app11072955

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…Studies have recently been conducted to mix nanomaterials into construction materials and improve their versatility [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. Particularly, researchers worldwide are performing studies on the electrical properties and heating performance of cementitious composites using nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to detect defects by comparing the change in temperature with thermal images in cementitious composites mixed with carbon-based nanomaterials induced during heat generation performance measurement experiments. Moreover, it is possible to detect defects by measuring electrical resistance when carbon-based nanomaterials were mixed in a cementitious composite, mortar, and concrete [ 13 , 14 , 15 ]. Lee et al [ 16 ] analyzed the relationship between the filling rate and pore of the cement grout mixed with MWCNT.…”

Section: Introductionmentioning

confidence: 99%

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Correlation Analysis between Strength and Defect of Nano-Cementitious Composites using Ultrasonic Pulse Velocity

et al. 2023

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Recently, researchers are conducting studies to improve the mechanical and chemical properties of cementitious composites mixed with nanomaterials. Defects may occur inside nano-cementitious composites due to nanomaterial agglomeration in the manufacturing process. These defects can degrade the mechanical performance of the nano-cementitious composite. This study performs ultrasonic non-destructive and compressive strength tests according to the size of defects in nano-cementitious composites. Multi-walled carbon nanotubes (MWCNTs) were used for the nanomaterial, and internal defects of various sizes were considered in the center of the specimens. Ultrasonic pulse velocity was measured according to the defect size until 30 curing days, after which the compressive strength was measured. The ultrasonic pulse velocity of the nano-cementitious composites decreased by up to 9.6% in relation to that of the specimens without defects as the defect size increased, and the compressive strength decreased by up to 35.7%. This study’s findings revealed a correlation between ultrasonic pulse velocity and compressive strength according to defect size. Future ultrasonic non-destructive tests will allow for the prediction of mechanical performance and the detection of defects within nano-cementitious composites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation Analysis between Strength and Defect of Nano-Cementitious Composites using Ultrasonic Pulse Velocity

et al. 2023

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Thermal, electrical, and mechanical performances of ultrahigh-performance cementitious composites with multiwalled carbon nanotubes

Kang,

Pyo,

Lee

2024

Case Studies in Construction Materials

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Investigating the Effect of CNTs on Early Age Hydration and Autogenous Shrinkage of Cement Composite

Park

Choi

2021

Applied Sciences

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In this study, the effect of carbon nanotubes (CNTs) on the physical properties of cement composites was investigated. The mechanism of the change of autogenous shrinkage of CNTs-reinforced cement composites was also examined. In the experiments, ordinary Portland cement (OPC) and fly ash (FA) were used as binders, and 0.0, 0.1, 0.3, and 0.5% multi-walled CNTs (MWCNTs) were added to fabricate pastes. When the hydration heat was measured through isothermal calorimetry, it was found that CNTs accelerated the early age hydration of the pastes and that the hydration rate increased as the CNT content increased. The compressive strength was the highest when the CNT content was 0.1%. As the CNT content increased, the internal relative humidity (IRH) decreased and autogenous shrinkage showed a decreasing tendency. Through the analysis of the correlation between autogenous shrinkage and IRH, it was confirmed that the reduction in autogenous shrinkage due to the addition of CNTs resulted from the decrease in bulk strain.

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Damage Detection of Carbon Nanotube Cementitious Composites Using Thermal and Electrical Resistance Properties

Cited by 4 publications

References 31 publications

Correlation Analysis between Strength and Defect of Nano-Cementitious Composites using Ultrasonic Pulse Velocity

Correlation Analysis between Strength and Defect of Nano-Cementitious Composites using Ultrasonic Pulse Velocity

Thermal, electrical, and mechanical performances of ultrahigh-performance cementitious composites with multiwalled carbon nanotubes

Investigating the Effect of CNTs on Early Age Hydration and Autogenous Shrinkage of Cement Composite

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