Scholarlink

The global imperative to transition towards sustainable and energy-efficient practices has brought to the forefront the need for innovative solutions and strategies within the construction industry, a major contributor to energy-related emissions. With over a third of global emissions stemming from the built environment, the construction sector, particularly in extreme exposures, faces unique challenges. Reinforced Concrete (RC) structures in chloride-laden environments are especially vulnerable to rapid deterioration. The integration of binders such as fly ash and slag, as well as blended cements, has been suggested in international and local codes as a relief to this problem. Despite these preventive strategies, insufficient concrete cover often undermines these efforts, resulting in severe degradation of RC structures in regions like Bangladesh where performance-based rebar cover design is not available in local codes. Once an RC structure reaches a limit state of spalling due to rebar corrosion, it often necessitates concrete patchworks to ensure continued service. However, such patchworks are often not only expensive but also energy intensive due to further utilization of concrete, resulting higher-than-anticipated lifetime CO2 emissions. This study shows the effectiveness of concrete cover as a strategy in reducing the carbon footprint of marine RC construction from the perspective of Bangladesh. Few commonly practiced concrete mixes in Bangladesh have been investigated for durability parameters, exploring the integration of environmentally friendly supplementary binders such as fly ash and slag. To assess the impact of various rebar covers in combination with binder types on the lifecycle CO2 emission of RC structures, a probabilistic approach utilizing Monte Carlo Simulation is employed. This allowed for a comprehensive evaluation of the service life of structures built with different mixes, emphasizing the critical role of concrete cover practices in reducing the frequency of repair works and associated energy-intensive CO2 emissions.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Importance of Optimally Combining Binder Types and Rebar Cover in Reducing Lifetime CO2 Emissions in RC Structures

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年

查看全文
  • Sakib Hasnat,
  • Tanvir Manzur

摘要

The global imperative to transition towards sustainable and energy-efficient practices has brought to the forefront the need for innovative solutions and strategies within the construction industry, a major contributor to energy-related emissions. With over a third of global emissions stemming from the built environment, the construction sector, particularly in extreme exposures, faces unique challenges. Reinforced Concrete (RC) structures in chloride-laden environments are especially vulnerable to rapid deterioration. The integration of binders such as fly ash and slag, as well as blended cements, has been suggested in international and local codes as a relief to this problem. Despite these preventive strategies, insufficient concrete cover often undermines these efforts, resulting in severe degradation of RC structures in regions like Bangladesh where performance-based rebar cover design is not available in local codes. Once an RC structure reaches a limit state of spalling due to rebar corrosion, it often necessitates concrete patchworks to ensure continued service. However, such patchworks are often not only expensive but also energy intensive due to further utilization of concrete, resulting higher-than-anticipated lifetime CO2 emissions. This study shows the effectiveness of concrete cover as a strategy in reducing the carbon footprint of marine RC construction from the perspective of Bangladesh. Few commonly practiced concrete mixes in Bangladesh have been investigated for durability parameters, exploring the integration of environmentally friendly supplementary binders such as fly ash and slag. To assess the impact of various rebar covers in combination with binder types on the lifecycle CO2 emission of RC structures, a probabilistic approach utilizing Monte Carlo Simulation is employed. This allowed for a comprehensive evaluation of the service life of structures built with different mixes, emphasizing the critical role of concrete cover practices in reducing the frequency of repair works and associated energy-intensive CO2 emissions.