Restoration of reinforced concrete structures destroyed in an aggressive chlorine environment
V. V. Molodin, D. S. Novikov
Novosibirsk State University of Architecture and Civil Engineering
Annotation: Reinforced concrete structures that have been used for a long time in an aggressive environment has an characteristic feature - low adhesion strength to newly laid concrete when restoring such structures. The reason for this fact is the destruction, under the influence of aggressive agents, of the crystalline cross-linking intergrowths responsible for adhesion. Traditional methods of restoring damaged reinforced concrete structures that have been subjected to corrosion cannot provide high-quality adhesion between “old” and “new” concrete. It has been established that forced heating of the “repair” concrete mixture, when laid on the surface of concrete that has been subjected to chloride corrosion, forms a flow of moisture with cement dissolution products from the “new” concrete to the “old” one, which is forced through the layer damaged by corrosion. After curing, the crystalline structure is restored, the laid and undamaged layers are connected by chlorine ions. This ensures a strong grip.
Keywords: adhesion, corrosion, chlorine ions, temperature gradient.
Pages: 26-30.
Link for citation: Molodin, V. V.; Novikov, D. S. Restoration of reinforced concrete structures destroyed in an aggressive chlorine environment. – Text : direct. – In: The Donbas Constructon. – 2023. – Issue 3-2023. – Р. 26-30.
Issue 3-2023Journal: The Donbas Constructon
Publish house: Donbas National Academy of Civil Engineering and Architecture