Environmental and Economic Assessment of Pavements Considering Co₂ Uptake During Service and Demolition Phases

Key Points

• This research aims to assess the CO₂ uptake effects of asphalt and concrete pavements during their service and demolition phases.
• Calculated the life cycle CO₂ (LCCO₂) emissions of both asphalt and concrete pavements.
• Included CO₂ absorption from concrete carbonation during service and demolition stages.
• Proposed a visual evaluation method for roadway managers to select pavements based on LCCO₂ and reduction effects.
• CO₂ absorption comprised 3.5% to 5.5% of LCCO₂ overall.
• Estimated CO₂ absorption potential from concrete pavements over 30 years is about 520,000 tons.
• Demolition phase may yield approximately 2.94 million tons of CO₂ absorption.