Nanoindentation and nano-scratch testing on cement paste

Article

Barbhuiya, S. and Das, B. B. 2023. Nanoindentation and nano-scratch testing on cement paste. Construction Materials. 177 (2), pp. 78-86. https://doi.org/10.1680/jcoma.22.00054
AuthorsBarbhuiya, S. and Das, B. B.
Abstract

Carbon nanotubes are an attractive reinforcement material for several composites. This is due to their inherently high
tensile strength and high modulus of elasticity. This study focused on the nanomechanical characteristics of cement paste with and without short multi-walled carbon nanotubes (MWCNTs). The objective behind studying the nanomechanical properties of cement paste is to better understand the fundamental behaviour of cement at the nanoscale level. Cement paste is a complex material that consists of various phases, including cement hydrates, unhydrated cement particles and porosity. By studying the mechanical properties of cement paste at the nanoscale, researchers can gain insights into the mechanisms that govern the behaviour of this material. Following earlier tests, the amount of MWCNTs was kept constant (0.30% by weight of cement). The nanomechanical parameters explored included the localised Young’s modulus and hardness. According to the test results, short MWCNTs increased the proportion of high-density calcium silicate hydrate in the cement paste. The nanomechanical properties (localised Young’s modulus and hardness) of cement paste with short MWCNTs were found to be greater than those of cement paste without MWCNTs. According to nano-scratching experiments, the cement matrix with short MWCNTs was substantially more durable than the matrix without them.

Keywordscement paste; C-S-H; elasticity
JournalConstruction Materials
Journal citation177 (2), pp. 78-86
ISSN1747-650X
Year2023
PublisherICE Publishing
Accepted author manuscript
License
File Access Level
Anyone
Digital Object Identifier (DOI)https://doi.org/10.1680/jcoma.22.00054
Publication dates
Online13 Jul 2023
Publication process dates
Accepted25 May 2023
Deposited09 Oct 2023
Copyright holder© 2023, ICE Publishing
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