Multi-scale mechanical and fracture characteristics and early-age strain capacity of high performance carbon nanotube/cement nanocomposites
Source abstract
Abstract
Abstract Due to their exceptional mechanical properties, carbon nanotubes (CNTs) are considered to be one of the most promising reinforcing materials for the next generation of high-performance nanocomposites. In this study, the reinforcing effect of highly dispersed multiwall carbon nanotubes (MWCNTs) in cement paste matrix has been investigated. The MWCNTs were effectively dispersed in the mixing water by using a simple, one step method utilizing ultrasonic energy and a commercially available surfactant. A detailed study on the effects of MWCNTs concentration and aspect ratio was conducted. The excellent reinforcing capabilities of the MWCNTs are demonstrated by the enhanced fracture resistance properties of the cementitious matrix. Additionally, nanoindentation results suggest that the use of MWCNTs can increase the amount of high stiffness C–S–H and decrease the porosity. Besides the benefits of the reinforcing effect, autogenous shrinkage test results indicate that MWCNTs can also have a beneficial effect on the early strain capacity of the cementitious matrix, improving this way the early age and long term durability of the cementitious nanocomposites.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Smart Materials for Construction · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
Show source-provided references
1. Mechanical properties of carbon nanotubes10.1007/s003390050999 ↗
2. Atomistic simulations of nanotube fracture10.1103/PhysRevB.65.235430 ↗
3. Makar JM, Beaudoin JJ. Carbon nanotubes and their applications in the construction industry. In: Bartos PJM, Hughes JJ, Trtik P, Zhu W, editors. Nanotechnology in construction, Proceedings of the 1st international symposium on nanotechnology in construction. Royal Society of Chemistry; 2004. p. 331–41.10.1039/9781847551528-00331 ↗
4. Makar JM, Margeson J, Luh J. Carbon nanotube/cement composites – early results and potential applications. In: Proceedings of the 3rd international conference on construction materials: performance, innovations and structural implications, Vancouver, BC, Canada; 2005. p. 1–10.
5. Mechanical behavior and microstructure of cement composites incorporating surface-treated multi-walled carbon nanotubes10.1016/j.carbon.2004.12.017 ↗
6. Pressure-sensitive and microstructure of carbon nanotube reinforced cement composites10.1016/j.cemconcomp.2006.12.011 ↗
7. Atomic force microscopy and nanoindentation of cement pastes with nanotube dispersions10.1002/pssa.200566166 ↗
8. Surface decoration of carbon nanotubes and mechanical properties of cement/carbon nanotube composites10.1680/adcr.2008.20.2.65 ↗
9. SEM/AFM studies of cementitious binder modified by MWCNT and nano-sized Fe needles
10. Metaxa ZS, Konsta-Gdoutos MS, Shah SP. Carbon nanotubes reinforced concrete. Nanotechnology of concrete: the next big thing is small, vol. 267, ACI special publications, SP-267-2; 2009. p. 11-20.
11. Shah SP, Konsta-Gdoutos MS, Metaxa ZS, Mondal P. Nanoscale modification of cementitious materials. In: Bittnar Z, Bartos PJM, Nemecek J, Smilauer V, Zeman J, editors. Nanotechnology in construction. 3. Proceedings of the third international symposium on nanotechnology in construction. Springer; 2009. p. 125–30.10.1007/978-3-642-00980-8_16 ↗
12. Dispersion and alignment of carbon nanotubes in polymer matrix: a review10.1016/j.mser.2005.04.002 ↗
13. Carbon nanotubes becoming clean10.1016/S1369-7021(06)71789-8 ↗
14. Konsta-Gdoutos MS, Metaxa ZS, Shah SP. Nanoimaging of highly dispersed carbon nanotube reinforced cement based materials. In: Gettu R, editor. Proceedings of the seventh international RILEM symposium on fiber reinforced concrete: design and applications. RILEM Publications S.A.R.L.; 2008. p. 125–31.
15. Shah · 1995
16. Creep effects in nanoindentation of hydrated phases of cement pastes
17. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments10.1557/JMR.1992.1564 ↗
18. Nanoscale characterization of cementitious materials
19. The nanogranular nature of C–S–H10.1016/j.jmps.2006.06.003 ↗
20. Mindess · 2003
21. Mondal P, Nanomechanical properties of cementitious materials. PhD thesis, Evanston, Northwestern, University; 2008.
22. Shrinkage mitigation strategies in cement systems: a closer look at differences in sealed and unsealed behavior10.3141/2070-08 ↗
23. Mitigation strategies for autogenous shrinkage cracking10.1016/S0958-9465(03)00045-3 ↗
24. Internal curing of high-performance blended cement mortars
25. 1999
26. Konsta-Gdoutos MS, Shah SP, Dattatraya DJ. Relationships between engineering characteristics and material properties of high strength-high performance concrete. In: Dhir RV, Newlands MD, Csetenvi LJ, editors. Proceedings of international symposia celebrating concrete: people and practice, in role of cement science in sustainable development, Thomas Telford Limited; 2003. p. 37–46.10.1680/rocisd.32477.0004 ↗