Carbon Emission Reduction Potential of In-Place Pavement Recycling in Urban Coastal Road Maintenance - A Case Study of Hai Phong City

DOI: https://doi.org/10.55228/JTST150206

Keywords

Cold in-place recycling, Carbon emission reduction, Life cycle assessment, Pavement maintenance, Coastal roads, Fatigue life extension

Abstract

This study applies life cycle assessment (LCA) to compare carbon emissions from milling and overlay with hot mix asphalt (M&O) and cold in-place recycling (CIR) for coastal urban roads in Hai Phong City. The functional unit is a 1 km Î 10 m road section over a 20-year period.Results show that total emissions of M&O range from 122 to 262 tCO₂, while CIR varies between 29 and 237 tCO₂ depending on system boundaries. On an area-based, on-site emission basis, CIR achieves a 76.4% reduction compared with M&O, particularly under coastal climatic conditions.Sensitivity analysis identifies cement and bitumen contents as key drivers of CIR carbon performance. Overall, CIR is a promising maintenance option supporting green transport infrastructure and Vietnam’s Net Zero 2050 target

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