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Chemo/piezoresistive hpfrcc carrying carbon fiber and carbon nanotubes for sensing



Title: Chemo/piezoresistive hpfrcc carrying carbon fiber and carbon nanotubes for sensing
Author(s): N. Banthia and F. Azhari
Paper category : conference
Book title: 2nd International RILEM Conference on Strain Hardening Cementitious Composites (SHCC2-Rio)
Editor(s): R.D. Toledo Filho, F.A. Silva, E.A.B. Koenders and E.M.R. Fairbairn
ISBN: 978-2-35158-120-9
e-ISBN: 978-2-35158-121-6
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 97 - 106
Total Pages: 10
Nb references: 12
Language: English


Abstract: High Performance Fiber reinforced Cementitious Composites (HPFRCC) based on conductive fibers, such as carbon, are both chemo- and piezo-resistive. Piezo-resistivity is a unique material property which allows materials to change its electrical resistance/impedance as a result of changes in the applied stress/strain and chemo-resistivity refers to change its electrical resistance/impedance as a result of changes in the chemical environment. HPFRCCs are therefore smart materials that can act as low-cost sensors. This paper discusses the piezo/chemo resistive properties of FRC and describe the development of cement-based sensors with carbon fibers and carbon nano-tubes. Emphasis is on strain measurement, but these sensors are equally useful as chemical sensors capable of detecting pH changes, carbonation profiles, chloride ingress and corrosion initiation in rebar.


Online publication: 2012-01-25
Publication type : full_text
Public price (Euros): 0.00