Concrete from old buildings can often be reused instead of being demolished, reducing waste and cutting carbon emissions. The challenge is proving that reused concrete will remain safe and durable for decades. 

This study presents a new method for estimating how long reused concrete can last, through probabilistic prediction of service life (covering both carbonation and corrosion stages). Using Monte Carlo simulations and case studies of Nordic precast concrete buildings, the research shows that reused concrete elements can achieve service lives similar to new ones when properly assessed and repaired. 

The framework supports smarter decisions on reuse, helping make construction more circular, resource-efficient and sustainable.

This study explores how social ties and social impact can be accounted for in circular economy initiatives. 

It examines how a local project managing organic waste and unsold goods fosters social ties in a priority urban neighborhood in France, and how these dynamics can be grasped using an alternative qualitative accounting approach. 

It identifies key creators of social ties within local initiatives, proposes a social balance sheet highlighting factors that stimulate or undermine these ties and introduces a methodological approach for counting or recounting social impact in circular economy projects.