| Issue |
MATEC Web Conf.
Volume 251, 2018
VI International Scientific Conference “Integration, Partnership and Innovation in Construction Science and Education” (IPICSE-2018)
|
|
|---|---|---|
| Article Number | 01030 | |
| Number of page(s) | 9 | |
| Section | Building Materials | |
| DOI | https://doi.org/10.1051/matecconf/201825101030 | |
| Published online | 14 December 2018 | |
The investigation of multi-walled carbon nanotubes dispersion and its influence on rheological properties of cement systems
1
Vilnius Gediminas Technical University, Department of Building Materials and Fire Safety, LT-10223 Vilnius, Lithuania
2
Kalashnikov Izhevsk State Technical University, Department of Geo-Engineering and Construction Materials, 426069 Izhevsk, Russia
* Corresponding author: ekaterina.karpova@vgtu.lt
The current research is devoted to the studying of multi-walled carbon nanotubes (MWCNT) dispersion and its influence on the rheological properties of cement pastes. The pH and electrical conductivity test, zeta potential measurements, particle size analysis were performed for characterization of MWCNT dispersion. The MWCNT dispersion were tested during 1 month and presented the decrease of pH level from 8.89 to 8.02, increase of electrical conductivity from 2.00 to 2.75 mS/cm. The particle size analysis did not reveal the significant changes during 1 month of storage. The rheological test of nanomodified cement pastes were performed for concentration of MWCNT dispersion in the range from 0 to 0.5% by weight of cement. The decrease of yield stress by 30.7% and increase of plastic viscosity by 29.6% were obtained for cement paste modified by MWCNT dispersion in dosage of 0.25% by weight of cement. The changes in flow behaviour were established for cement pastes tested in 5 min after mixing and were not observed for cement pastes tested after 120 min of mixing.
© The Authors, published by EDP Sciences, 2018
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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