Abstract

ANNOTATION: Introduction.This article presents the outcomes of research investigations examining the impact of carbon nanotube additives on the phase composition of cement mortars employed in well cementing operations. The quality of work on cementing and ensuring the impermeability of the casing string is quite important in terms of ecological compliance. Research methods. To solve this problem, heavy concrete was modified with a carbon nanoadditive. For research, a cement stone obtained by moisture curing chosen. Cement mortar CEM III/A32.5H was mixed with tap water for curing, preliminarily stirring a suspension of carbon nanotubes in water solution, a mixture of a water repellent and a hyperplasticizer. To ensure a homogeneous and highly dispersed structure of this suspension, its constituent components were subjected to preliminary dispersion in an ultrasonic field. Results and their discussion. The optimal ratio of carbon nanotubes in the composition of the cement mortar was determined, which amounted to 0.005% of the mass of cement for single-walled carbon nanotubes and 0.0005% for multilayer ones. The process of influence of the selected modifiers on the hydration products and the phase composition of the cement mortar was studied. An additive of complex action, including single-layer carbon nanotubes, was dispersed into solutions of a mixture of hydrophobic and hydrophilic surfactants, which made it possible to increase the strength of cement mortars up to 55%. Conclusion. In terms of modification, single-walled carbon nanotubes are the most efficient.

Details

Title
Investigating the influence of carbon nanotube-based additives on the phase composition of cement mortar during well cementation
Author
Vakhitova, Roza II 1 ; Saracheva, Diana A 1 ; Kiyamov, Ilgam K 2 ; Sabitov, Linar S 2 ; Oleinik, Vasily Iv 3 

 Almetyevsk State Oil Institute, Almetyevsk, Russia 
 Kazan (Volga Region) Federal University, Kazan, Russia 
 LLC «3DATA», Moscow, Russia 
Pages
418-423
Section
Original article
Publication year
2023
Publication date
2023
Publisher
LLC CNT NanoStroitelstvo
e-ISSN
20758545
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2904329794
Copyright
© 2023. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.