Computers and Concrete

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Service life of concrete culverts repaired with biological sulfate-resisting mortars

  • Hyun-Sub, Yoon (Department of Architectural Engineering, Kyonggi University) ;
  • Keun-Hyeok, Yang (Department of Architectural Engineering, Kyonggi University) ;
  • Nguyen, Van Tuan (Faculty of Building Materials, Hanoi University of Civil Engineering) ;
  • Seung-Jun, Kwon (Department of Civil and Environmental Engineering, Hannam University)
  • Received : 2022.04.15
  • Accepted : 2022.10.25
  • Published : 2022.12.25
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Abstract

The purpose of this study is to examine the effectiveness of biological repairing mortars on restoring the structural performance of a sewage culvert deteriorated by sulfate attack. The biological mortars were developed for protecting concrete structures exposed to sulfate attack based on the block membrane action of the bacterial glycocalyx. The diffusion coefficient of sulfate ions in the biological mortars was determined from the natural diffusion cell tests. The effect of sulfate-attack-induced concrete deterioration on the structural performance of culverts was examined by using the moment-curvature relationship predicted based on the nonlinear section lamina approach considering the sulfuric-acid-induced degradation of the structure. Typical analytical assessments showed that biological mortars were quite effective in increasing the sulfate-resistant service life of sewage culverts.

Keywords

Acknowledgement

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (No. NRF-2020K1A3A1A05103600) and Ministry of Science and Technology of Vietnam (the research project 19/2021/HD-NDT).

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