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The need for sustainable rehabilitation (maintenance and repair) of existing structures is urgent and due to the expected deterioration of buildings and civil structures, there will be a great need for preventive and/ or curative interventions in the near future. More than 70% of the damage to reinforced concrete (RC), structures is linked to reinforcement corrosion, which can affect the durability of the structure and the residual load-bearing capacity. With the European transition towards a circular economy and the sustainable development goals in mind, it is important to deviate from considering only the technical requirements and initial costs during the design. Priority should be given to preserving products by extending their service life and prioritizing service life thinking. Therefore, the environmental impact and financial costs over the entire life cycle and the intended service life (SL) extension need to be considered. To assess the durability of RC structures and interventions throughout their life cycle, life cycle assessment (LCA) and life cycle cost analysis (LCCA) can be applied. For this reason, it is favourable to economically and environmentally optimize the intervention strategy for preventive maintenance and curative repair of corrosion-damaged RC structures (M&R strategies), based on a multi-criteria framework with the incorporation of LC(C) A. A residential building with damaged RC balconies in a Belgian coastal environment is chosen as case study. The objective is to assess five commonly used repair techniques environmentally and economically, i.e. patch repair, conventional repair, galvanic cathodic protection, impressed current cathodic protection, and total replacement. For a brief extension of the buildings’ SL (up to 5 years), patch repair emerges as the most favourable option, maintaining the existing condition with minimal intervention. However, to reach a longer SL extension (up to 40 years), conventional repair or cathodic protection emerge as competitive options where the entire renewal of concrete elements exhibits the highest overall environmental and financial impact.

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Life Cycle Strategy Optimization: A Methodological Framework for Concrete Structures Rehabilitation Decision Making Through LC(C)A

  • 会议论文

  • 发表日期：

    2025年

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  • Bart Craeye,
  • Lydia Wittocx,
  • Oskar Seuntjens,
  • Neel Renne,
  • Robin Debaene,
  • Hanne Bielen,
  • Ben Moins,
  • Amaryllis Audenaert,
  • Matthias Buyle

摘要

The need for sustainable rehabilitation (maintenance and repair) of existing structures is urgent and due to the expected deterioration of buildings and civil structures, there will be a great need for preventive and/ or curative interventions in the near future. More than 70% of the damage to reinforced concrete (RC), structures is linked to reinforcement corrosion, which can affect the durability of the structure and the residual load-bearing capacity. With the European transition towards a circular economy and the sustainable development goals in mind, it is important to deviate from considering only the technical requirements and initial costs during the design. Priority should be given to preserving products by extending their service life and prioritizing service life thinking. Therefore, the environmental impact and financial costs over the entire life cycle and the intended service life (SL) extension need to be considered. To assess the durability of RC structures and interventions throughout their life cycle, life cycle assessment (LCA) and life cycle cost analysis (LCCA) can be applied. For this reason, it is favourable to economically and environmentally optimize the intervention strategy for preventive maintenance and curative repair of corrosion-damaged RC structures (M&R strategies), based on a multi-criteria framework with the incorporation of LC(C) A. A residential building with damaged RC balconies in a Belgian coastal environment is chosen as case study. The objective is to assess five commonly used repair techniques environmentally and economically, i.e. patch repair, conventional repair, galvanic cathodic protection, impressed current cathodic protection, and total replacement. For a brief extension of the buildings’ SL (up to 5 years), patch repair emerges as the most favourable option, maintaining the existing condition with minimal intervention. However, to reach a longer SL extension (up to 40 years), conventional repair or cathodic protection emerge as competitive options where the entire renewal of concrete elements exhibits the highest overall environmental and financial impact.