Effect of multi-walled carbon nanotubes on the damping property of cement mortar and mechanism analysis
- 15 June 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Archives of Civil and Mechanical Engineering
- Vol. 21 (3), 1-14
- https://doi.org/10.1007/s43452-021-00253-z
Abstract
The effect of the type and content of multi-wall carbon nanotubes (MWCNTs) on the damping performance of cement mortar is studied in this paper. The pristine MWCNTs (P-CNT) and the functionalized MWCNTs (F-CNT) grafted with COOH were used in the experiment. The content of MWCNTs was 0.05wt% and 0.1wt% of cement. The flexural/compressive strength and loss factor of CNT-mortar composites were measured. The experimental results show that MWCNTs can significantly enhance the flexural strength and loss factor, and the values increased with the increase of CNTs content. The effect F-CNT was better than P-CNT when the MWCNTs content was the same due to the presence of COOH. The mechanism of MWCNTs reinforced mortar damping performance was analyzed by a variety of micro test techniques. The test results of X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and thermogravimetry showed that MWCNTs did not change the compositions of mortar, but improved the polymerization degree of gel and the degree of hydration of cement. The results of mercury intrusion porosimetry, N2 adsorption and backscattered scanning electron microscopy showed that MWCNTs effectively reduced the porosity and interfacial transition zone thickness of mortar. Transmission electron microscope results showed that the energy dissipation capacity of mortar is increased due to the bridging effect of MWCNTs.Keywords
Funding Information
- National Natural Science Foundation of China (51808015)
- Beijing Millions of Talents Project (2018A37)
- Beijing Natural Science Foundation (8202005)
- National Natural Science Foundation of China (52078015)
This publication has 52 references indexed in Scilit:
- Deteriorated hardened cement paste structure analyzed by XPS and 29Si NMR techniquesCement and Concrete Research, 2013
- Dispersion of carbon nanotubes and its influence on the mechanical properties of the cement matrixCement and Concrete Composites, 2012
- The influences of admixtures on the dispersion, workability, and strength of carbon nanotube–OPC paste mixturesCement and Concrete Composites, 2011
- Effect of steel and carbon fiber additions on the dynamic properties of concrete containing silica fumeMaterials & Design (1980-2015), 2011
- Dispersion of Functionalized Multiwalled Carbon NanotubesThe Journal of Physical Chemistry C, 2009
- The microstructure of the interfacial transition zone between steel and cement pasteCement and Concrete Research, 2001
- Degree of hydration and gel/space ratio of high-volume fly ash/cement systemsCement and Concrete Research, 2000
- Investigation of vibration damping on polymer concrete with polyester resinCement and Concrete Research, 2000
- Thinning and opening of carbon nanotubes by oxidation using carbon dioxideNature, 1993
- Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)Published by Walter de Gruyter GmbH ,1985