The Effect of a Carbon Nanotubes-Based Modifier on the Formation of the Cement Stone Structure
Year: 2018
Type: article
Abstract: The present paper considers the effect of carbon nanotubes, used as the main component of a modifying comprehensive nanoadditive, on the kinetics of cement hydration, the phase composition and the strength characteristics of a cement stone. The increase in the strength characteristics of the cement stone modified by the nanoadditive was found to be due to the acceleration of the cement hydration, the formation of an optimum microstructure, in which, according to X-ray phase analysis, additional formation of low-basic calcium hydrosilicates already takes place during the initial period of hardening. Based on scanning electron microscopy, additional directional crystallization of particles of cement stone neoplasms, mainly with contacts of intergrowth, was elucidated. Accelerated curing kinetics of the nanomodified samples was observed to take place with an increase in the compressive strength of 20–30 % at the age of 28 days.
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2903005685