The effect of structural characteristics on electrical and physical properties of electrically conductive compositions based on mineral binders

Abstract

Abstract. The present-day situation is such that industrial production, municipal economy, traffic, etc consume a continuously increasing amount of energy. As a result, the range of propagation of electric stray currents, including their appropriate potentials and leakage currents that affect building structures and facilities is expanded and this is of importance. It requires stricter demands regarding protection of building structures and facilities exposed to electric currents and potentials. This study gives the research data on the influence of structure on electrophysical properties, in particular specific electric resistance of the silicate compositions obtained for electrocorrosion protection. The theoretical research done allowed us to plot the relationships to define the specific electric resistance and the specific conductivity of a composite material using the data on its composition and the specific electric resistance of the filler and matrix. The algorithm to define the specific electric resistance of the composite material was developed for research and/or technological purposes by using the data on specific electric resistance of the filler, matrix and composition.

Electric potentials and charges on buildings and areas around deep water wells

“…A.A. Staroselsky was the first to notice corrosion changes of the cement stone near the reinforcement [3]. The concrete electrocorrosion was studied in detail in [4][5][6]. It was established that the concrete electrocorrosion is manifested by the intensive electromigration leaching of the cement stone exposed to the pulsed unidirectional electric potential.…”

“…This potential is created by trains running on DC rail sections. Papers [7] and [8] state that the alternating current and potential also condition the iron concrete and concrete electrocorrosion, though it is less intensive.…”

“…Papers [4,6,14] describe the mechanisms of propagation of potentials from rail tracks in the locality and structures, including their configuration on the plane, and [14][15][16][17] describe propagation mechanisms of the potentials created by the polarization of ground massifs, including transfer of ions, mainly cations, water streams, filtration, diffusion and electromigration of flows and vertical polarization of structures and buildings [16,17]. However, the influence that vertically extended structures, in particular water-supply wells, have on electric potentials in the territory adjacent to them and the electrocorrosion damages to structures were not studied.…”

Research into the effectiveness of grounded screens of electroconductive silicate compositions for electrocorrosion protection

“…It was noted in [3] that concrete is also corroded near the reinforcement. It was established in [4][5][6] that the electrocorrosion of concrete proceeds not only near the reinforcement, but even in unreinforced structures and masonry mortar, and consists in the intensive electromigration leaching of the cement stone under the action of a pulsating unidirectional electric potential. This potential is created when trains run along a rail section electrified by a direct current.…”

“…In [4,7] it was proposed to apply the diode grounding of metal-injection jacket for electrocorrosion protection of culvert structures. Such jacketing is used to repair damaged pipe structures (Fig.…”