Properties of Cement-Based Composites Modified with Metal/Carbon Nanocomposite

Abstract:

The objective of this research is to study and analyse the properties of a cement-based composite modified with nickel/carbon nanocomposite (Ni/C NC). According to previous studies carried out by scientists in the field of nanostructures, it was assumed that metal/carbon nanostructures can increase the strength and impart electrically conductive properties to composite materials [9,12]. To confirm this hypothesis, in this research, mechanical strength tests and measurements of the electrical resistance of the modified samples were carried out. It was found that the addition of nickel/carbon nanocomposite in the amount of 0.05% increases the compressive strength of silicate composites by 35%. Moreover, by measuring the electrical conductivity of the samples, it was established that with the introduction of additives in the amount of 0.01-0.05% in relation to Portland cement, the resistance decreases by 80-84%. Further, the structural effect of Ni/C NC on the cement matrix was studied by the methods of IR spectral, differential thermal analyses, X-ray microanalysis. As a result of the analysis, it was revealed that the dispersions are crystallization centers during cement hydration and create chemical bonds with silicon oxide in the composition of the silicate composite. Ni/C NC has a structuring effect on the silicate binder matrix through the formation of a denser packing, which affects the mechanical properties and electrical conductivity of the material. The results of the study can be used to obtain electrically conductive materials with desired properties that can perform the functions of heating, monitoring the state of structures during operation, and protecting against an electromagnetic pulse.

• Periodical: Materials Science Forum (Volume 1089)
• Pages: 145-152
• DOI: https://doi.org/10.4028/p-2y07ly
• Online since: May 2023
• Authors: Svetlana N. Semyonova*, Grigory Ivanovich Yakovlev, Irina Sergeevna Polyanskikh, Аleksandr F. Buryanov, Arina Valentinovna Shaybadullina
• Keywords: Compressive Strength, Differential Thermal Analysis, IR-Spectroscopy, Metal/Carbon Nanocomposites, Silicate Composites, X-Ray Microanalysis

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