期刊
JOURNAL OF TESTING AND EVALUATION
卷 40, 期 5, 页码 838-843出版社
AMER SOC TESTING MATERIALS
DOI: 10.1520/JTE20120092
关键词
sensing properties; carbon nanotubes; carbon fiber; cement nanocomposites
资金
- National Natural Science Foundation of China [50978200]
In this work, carbon nanotubes (CNTs) were added into a carbon fiber cement system to produce carbon nanotube carbon fiber/cement nanocomposites in the form of pastes. The compressive strength, morphology, pressure-sensitive properties, and temperature-sensitive properties were tested. The results show strengthening of the mechanical properties and pressure sensitivity as the CNT content increases from 0.2% to 1.0% by mass of cement. The addition of CNTs into cement paste also leads to enhancement of the temperature sensitivity. Additionally, microscopic observation shows that CNTs act as fillers, which results in a dense microstructure of cement paste. Test results indicate that the carbon nanotube-carbon fiber/cement composites show potential either as stress sensors for vehicle detection, weigh-in-motion measurement, and vehicle speed detection or as thermistors for temperature monitoring in concrete structures.
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