Nanoindentation Method for Studying the Structure of Modified Cement Stone

Preliminary results for the cement specimens under study have been obtained by the nanoindentation method. It has been found that the elastic modulus increases in the specimens that contain a complex admixture with nanosize particles. Also, the effect is observed on adding an admixture containing on...

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Bibliographic Details
Published in:Journal of engineering physics and thermophysics 2021-09, Vol.94 (5), p.1194-1207
Main Authors: Polonina, E. N., Lahayne, O., Eberhardsteiner, J., Potapov, V. V., Zhdanok, S. A., Leonovich, S. N.
Format: Article
Language:English
Subjects:
Classical Mechanics
Complex Systems
Engineering
Engineering Thermodynamics
Heat and Mass Transfer
Histograms
Industrial Chemistry/Chemical Engineering
Modulus of elasticity
Nanoindentation
Nanoindenters
Nanoparticles
Nanostructures
Silicon dioxide
Thermodynamics
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Summary:Preliminary results for the cement specimens under study have been obtained by the nanoindentation method. It has been found that the elastic modulus increases in the specimens that contain a complex admixture with nanosize particles. Also, the effect is observed on adding an admixture containing only one type of nanoparticles (sol of nanosilica SiO 2 or the MWCNT carbon material). Parameters of the nanoindentation method have been selected that ensure obtaining final consistent results. These results are presented by the histograms of distribution of nanoindentation points by elastic moduli and hardness, and also by the distributions in these characteristics in the horizontal plane xy, which is perpendicular to the nanoindenter′s motion. The obtained results suggest that there is a change in the nanostructure of the C–S–H gel, which is compared with the increment in the strength, the Young moduli, and the shear on adding SiO 2 nanoparticles and MWCNT nanoparticles.
ISSN:1062-0125
1573-871X
DOI:10.1007/s10891-021-02400-y