A pressure-sensitive carbon black cement composite for traffic monitoring
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractRecent 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°C to 45°C. The mechanical essays were performed under realistic conditions using 600cm3 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.
CitationMonteiro AO, Loredo A, Costa PMFJ, Oeser M, Cachim PB (2017) A pressure-sensitive carbon black cement composite for traffic monitoring. Construction and Building Materials 154: 1079–1086. Available: http://dx.doi.org/10.1016/j.conbuildmat.2017.08.053.
SponsorsAOM acknowledges support from the Portuguese Foundation of Science and Technology FCT with a PhD scholarship (SFRH/BD/84644/2012), the institute for highway engineering (ISAC) of the University of Aachen (RWTH) for scientific collaboration and the Eng. Manfred Knispel for his interest and technical support. AL thanks a grant from the Visiting Student Research Program at KAUST – Saudi Arabia. PMFJC is grateful to KAUST for financial support (BAS/1/1346-01-01). The authors acknowledge Orion Engineered Carbons for the carbon black supply.