Effect of fibre loading on the microstructural, electrical, and mechanical properties of carbon fibre incorporated smart cement-based composites

Research output: Contribution to journalArticlepeer-review

16 Downloads (Pure)

Abstract

Carbon fibre incorporated smart cement-based composite has great potential for the multifunctional health monitoring of concrete structures. This paper presents the microstructural, electrical, and mechanical properties of smart
cement-based composites incorporating chopped carbon fibres from low
dosages at 0–0.1% by volume (vol%) with detailed intervals, to high dosages
up to 2.4 vol%. In comparison to a plain mortar, smart cement-based
composites at all fibre contents had higher flexural strength. A 95%
improvement in flexural strength was obtained at a fibre content of 0.3 vol%,
whereas compressive strength increased up to a fibre content of 1.0 vol%, with
the highest improvement, 105%, at 0.2 vol%. The bulk conductivity of smart
cement-based composites underwent a double percolation process where the
percolation zone of the fibres was identified at fibre contents of 0–0.1 vol% and
the percolation zone of the capillary pores resided at fibre contents of
2.1–2.4 vol% indicating an extremely low durability. This study presents the
laboratory characterization on smart cement-based composites where the
fundamentals of the transitional behaviours of the mechanical properties
and the percolation in electrical property through fibre loading were studied,
which is a necessary step prior to the assessment of the self-sensing
performance. The impact of this study will enable the physical properties of
carbon fibre incorporated smart cement-based composites to be optimized
through the design and manufacturing process. This will lead to robust
performance and superior in-situ multi-functional health monitoring of
concrete structures.
Original languageEnglish
JournalFrontiers in Materials
DOIs
Publication statusAcceptance date - 22 Nov 2022

Fingerprint

Dive into the research topics of 'Effect of fibre loading on the microstructural, electrical, and mechanical properties of carbon fibre incorporated smart cement-based composites'. Together they form a unique fingerprint.

Cite this