An Alternative Repair Method of Reinforced Concrete Structure

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Başyiğit C.

2nd International Conference on Sustainable Science and Technology (ICSuSaT-2019), İstanbul, Turkey, 5 - 07 July 2019, pp.1-4, (Full Text)

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.1-4
  • Süleyman Demirel University Affiliated: Yes

Abstract

This research investigates to repair a concrete cracks with biofilm-forming bacteria. Biofilm defined as a group formed by micro-organisms living in a polymeric structure in a polymeric structure by adhering to surface. In general, concretes are typically characterized as quasi-brittle materials that exhibit low tensile strength. For this reason cracks, fragment breaks and decomposition may occur in concrete. There is a need for repair and / or strengthening as a result of various factors in reinforced concrete structures. Nowadays, classical repair and strengthening methods are used. In this study, biofilm was researched as an alternative repair method for reinforced concrete structure with biofilm-forming bacteria (bacillus subtilis). Bacterial strains were cultivated and reproduced in different media such as ethanol, glucose. Liquid nutrient media were used for pre-activation of bacteria. The strains were maintained to bacteria protection. After concrete samples are cured 90 days, cracks were formed according to TS 500 limit values for experimental studies. Bacteria were injected in sample cracks and 24, 48, 72 hours of observations were made after the injection process. It was observed that bacteria produced expanded polystyrene foam (EPS). As a result of these observations; It was shown that biofilm-forming bacteria fill cracks in concrete samples and repair cracks.