This report presents the general mindset on decarbonisation issues and very interesting decarbonization practices for earthworks projects. Some case studies presented different tools and different ways of carbon footprint calculation. Other case studies explained companies best practice for example changing their source of Energy or capturing CO2 or changing their practice using alternative material. These Earthworks case studies are useful for other users, companies or stakeholders.

This Case Study Report gather best practice among Civil Engineering activity. Earthworks are a singular domain not well understood in Civil Engineering Works. During Earthworks, natural ground is prepared, that means hills are cut, valleys are filled, slope are secured and ground is stabilized, so that everything is ready to host the Structure (Road, Platform, Buildings, etc). This invisible work (for the final user) represents about 80% of total Civil Works of an infrastructure project and is completed over a period from months to years. During this time, experts work hard to avoid, reduce or mitigate environmental impacts. Many guides explain how to protect fauna, flora and water during the works but very few explain how to reduce Green House Gases (GHG) Emissions. This is the challenge of 21st century, facing Climate Change and the increasing Natural Hazards due to this change. During the2024-2027 PIARC Cycle, TC4.3 members have endeavoured to understand how Earthworks can reduce their GHG emissions and reduce their impact on Climate Change.