The influence of carbon nanotubes on the properties of water solutions and fresh cement pastes

3rd International Conference on Innovative Materials, Structures and Technologies

Leonaviius, D.^1 ; Pundiene, I.^1 ; Girskas, G.^1 ; Pranckeviiene, J.^1 ; Kligys, M.^1 ; Sinica, M.^1

Vilnius Gediminas Technical University, Scientific Institute of Thermal Insulation, Linkmenu str. 28, Vilnius

LT-08217, Lithuania^1

关键词: Cement based material;    Cement paste;    Flow charac-teristics;    High specific surface area;    Peak time;    Rheological property;    Setting time;    Water solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012023/pdf
DOI  :  10.1088/1757-899X/251/1/012023

来源: IOP

【 摘 要 】

It is known, that the properties of cement-based materials can be significantly improved by addition of carbon nanotubes (CNTs). The dispersion of CNTs is an important process due to an extremely high specific surface area. This aspect is very relevant and is one of the main factors for the successful use of CNTs in cement-based materials. The influence of CNTs in different amounts (from 0 to 0.5 percent) on the pH values of water solutions and fresh cement pastes, and also on rheological properties, flow characteristics, setting time and EXO reaction of the fresh cement pastes was analyzed in this work. It was found that the increment of the amount of CNTs leads to decreased pH values of water solutions and fresh cement pastes, and also increases viscosity, setting times and EXO peak times of fresh cement pastes.