A pressure-sensitive carbon black cement composite for traffic monitoring

作者：Monteiro A O^*; Loredo A; Costa P M F J; Oeser M; Cachim P B

来源：Construction and Building Materials, 2017, 154: 1079-1086.

DOI：10.1016/j.conbuildmat.2017.08.053

• Carbon black
• Piezoresistivity
• Cement-based composites
• Multifunctional concrete
• Pressure-sensitive concrete
• Traffic monitoring

Recent advances in nanotechnology have guided the development of a new generation of multifunctional construction materials. An example of this are cement-based composites, some of which can be used not just to pave roads but, also to monitor them. A cement composite, integrating a carbon black (CB) filler, was used as a piezoresistive sensor to identify different cyclic compressive loadings, at temperatures ranging from 15 degrees C to 45 degrees C. The mechanical essays were performed under realistic conditions using 600 cm(3) specimens and uniaxial loads typical of automobile traffic. A linear and reversible pressure sensing performance was found with gauge factors ranging from 40 to 60. Overall, these results show that CB/cement composites can act as stress -sensitive materials for traffic monitoring.

• 出版日期2017-11-15
• 单位KAUST