Author(s):
1. Neđo Đurić, Akademija nauka i umjetnosti Republike Srpske, Republic of Srpska, Bosnia and Herzegovina
2. Perica Đuran, Tehnički institut Bijeljina, Republika Srpska, Bosna i Hercegovina, Republic of Srpska, Bosnia and Herzegovina
3. Dijana Đurić, Građevinski fakultet Subotica, Univerzitet Novi Sad, Serbia
4. Milan Perišić, Tehnički institut Bijeljina, Republika Srpska, Bosna i Hercegovina, Republic of Srpska, Bosnia and Herzegovina
5. M. Đurić, Tehnički institut Bijeljina, Republika Srpska, Bosna i Hercegovina, Republic of Srpska, Bosnia and Herzegovina

Abstract:
Concrete corrosion is a process of its destruction due to the chemical activity of material of the surrounding area. Alkaline surrounding in the internal structure of the concrete protects the concrete and armature from the negative effect of corrosion, while external effects weaken this protection. With carbon dioxide from the atmosphere, the pH reduces, resulting in a surface appearance of corrosion. Several factors influence the speed of corrosion formation, some of which were considered in this paper during an examination of the quality of the construction of pumping stations along the Sava River. Pumping stations were built in a different time interval, in the period from the fifties to the eighties of the twentieth century, and had a different preparation of concrete. Concrete and armature samples from the least favorable position in the construction of pumping stations were analyzed. Laboratory tests included mechanical and chemical destruction, of which the paper presents the significance of the chemical process, ie the process of concrete carbonation and sulfate corrosion.

Key words:
concrete,carbonation,sulfate corrosion

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
02.08.2019.

Conference:
Contemporary Materials 2019 - Savremeni Materijali