Investigating the Effects of Concrete Mix Design on the Environmental Impacts of Reinforced Concrete Structures

Publisher:
MDPI
Publication Type:
Journal Article
Citation:
Buildings, 13, (5), pp. 1313
Full metadata record
This study examines the impact of mix design parameters on the environmental effects of producing concrete and reinforced concrete buildings by conducting a life cycle assessment LCA and carbon footprint analysis CFA The study is limited to the cradle to gate phase including the extraction and production of raw materials for concrete production as well as concrete and rebar production material transportation and delivery to the construction site for reinforced concrete structures Three concrete mix designs based on the American Concrete Institute ACI 211 09 standard with compressive strengths of 20 30 and 40 MPa were analyzed The results indicate that cement was the primary contributor to environmental impacts accounting for approximately 90 of the carbon footprint Sand gravel and admixtures followed cement in their impact on LCA results Water usage in concrete production had a negligible effect on LCA indicators Moreover to determine how mix design parameters impact the carbon footprint of reinforced concrete buildings three four story structures were designed The results show that in reinforced concrete buildings concrete was a significant contributor to environmental impacts accounting for over 50 of all indicators in the IMPACT 2002 and CML baseline 2000 methods except for resources and acidification The study underscores the importance of considering mix design parameters in reducing the carbon footprint of reinforced concrete buildings and provides valuable insights into their environmental impacts The findings indicate that cement is the main driver of environmental impacts in both assessment methods accounting for around 90 of the carbon footprint Additionally concrete plays a substantial role in environmental effects contributing to over 50 of all indicators measured in the methods used for evaluating environmental impacts
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