Carbon nanotube/cement composites - early results and potential applications

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Conference3rd International Conference on Construction Materials: Performance, Innovation and Structural Implications: 21 August 2005, Vancouver, B.C.
Pages110; # of pages: 10
Subjectcement, carbon nanotubes, nanotechnology, concrete, composites, Vickers hardness; Cement/Concrete
AbstractCarbon nanotubes (CNT) have unique mechanical properties that make them close to ideal reinforcing materials. Single walled CNT have a modulus of elasticity of approximately 1 TPa, yield strengths measured at between 20 and 60 GPa, and measured elastic strains at yield that are greater than 10%. In addition, CNT typically have aspect ratios of 1000 or more.These attractive properties have led to considerable research on CNT composites. While particular attention has been paid to polymer based materials, metal and ceramic matrix materials have also been described in the literature. A new area of research involves CNT/cement systems. Early results investigating the microstructure of these systems show promise for the eventual development of carbon nanotube/cement composites. Scanning electron microscopy at the National Research Council has observed crack bridging and fiber pull-out in CNT/cement composites. Evidence for bonding between CNT and the cement matrix has also been observed. These reinforcing mechanisms have been shown to produce higher microhardness measurements at early stages of sample hydration as compared to cement control samples without CNT. This paper describes current developments in the production of CNT-cement composites. Possible applications for a successful composite material and areas of potential structural research activity are also discussed.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47643
NPARC number20377873
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Record identifier8b008cca-c122-44e1-a221-b307cb2229cc
Record created2012-07-24
Record modified2016-05-09
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