CARBON NANOPARTICLES CEMENT-BASED MATERIALS FOR SERVICE LIFE MONITORING

Author(s): André O. Monteiro, Paulo B. Cachim, Pedro M. F. J. Costa,
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-170-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 212-219
Total Pages: 8
Language : English

Abstract: This paper investigates the sensing capacities of piezoresistive cement-based composites
loaded with carbon black particles (CB), in order to develop embedded strain sensors for
service life monitoring of civil engineering structures. Several cement-based composites,
containing CB in concentrations up to 10% of binder mass (wt%), were mechanically
characterized and tested under cyclic uniaxial loads, registering deformation vs electrical
resistivity variations. Results showed reversible piezoresistive behaviour and quasi-linear
relationships between the fractional change in resistivity (FCR) and the compressive strain,
for compositions with higher amounts of CB. Gage factors (GF) of 28.09 and 24.42 were
found for compositions containing 7 and 10 wt%. These findings suggest that the
experimented material can become a promising alternative to monitor compressive strain
along the service life of concrete structures and roadways.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00