Journal
NANOMATERIALS AND NANOTECHNOLOGY
Volume 8, Issue -, Pages -Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1847980418793529
Keywords
Cement-based composites; multiscale carbon-admixtures; pressure sensitivity
Funding
- Nature Science Foundation of China (NSFC) [51578190, 51378156]
- National Basic Research Program (973 Program) [2011CB013604, 2013CB036305]
- Special Fund for the Innovative Talents in the Field of Science and Technology in Harbin [RC2014QN012014]
- Provincial Science and Technology Projects in Guangdong [2013B090500018]
- Fundamental Research Funds for the Central Universities [HIT.BRET III.2012 33]
- Shenzhen Technology Innovation Program-Technology Development Projects [CXZZ20140904154839135]
- Special funds of independent innovation industry development of Shenzhen Nanshan District [KC2015ZDYF0009A]
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The pressure-sensitive cement-based composites added with multiscale carbon materials, that is, carbon blacks, carbon fibers, and carbon nanotubes are investigated. In the article, the sensing property of cement-based composites with seven different proportions of carbon blacks, carbon fibers, and carbon nanotubes under cyclic loading is discussed and then the optimized formula among these seven proportions is chosen to investigate the influences of temperature and saturation degree on its sensing properties. In addition, the maximum perceivable frequency of multiscale carbon-admixtures-enhanced cement-based composite is obtained from the experimental results. The results indicate that the fractional change in resistance of the cement-based sensing composites increases at first and then decreases with the increase of temperature, but decreases with the increase of humidity. Additionally, the fractional change in resistance has a decrease with the increase of loading frequency, and the cement-based sensing composites prepared can perceive the biggest loading frequency of 0.5 Hz.
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