Role of Carbon Nanofiber on the Electrical Resistivity of Mortar under Compressive Load

Thanyarat Buasiri, Karin Habermehl-Cwirzen, Lukasz Krzeminski, Andrzej Cwirzen

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

A nanomodified cement consisting of particles with in situ synthesized carbon nanofibers was developed to introduce a strong load-sensing capability of the hydrated binder matrix. The material was produced using chemical vapor deposition. The nanomodified cement contained 2.71 wt% of carbon nanofibers (CNFs). The electrical properties of the composite were determined. Several mortar samples were prepared by partially substituting ordinary Portland cement with 2, 4, 6, 8, and 10 wt% of the nanomodified cement. Additionally an ordinary Portland cement mortar was used as reference. The results show that the strongest piezoresistive response and therefore the best load-sensing was obtained for the mortar containing the highest amount of CNFs. This mortar contained 10 wt% of nanomodified cement. The fractional change in electrical resistivity of this mortar was 82% and this mortar had a compressive strength of 28 MPa.
Original languageEnglish
Pages (from-to)32-37
Number of pages6
JournalTransportation Research Record
Volume2675
Issue number9
DOIs
Publication statusPublished - 10 Sept 2020

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