Material metabolism and lifecycle impact assessment towards sustainable resource management: A case study of the highway infrastructural system in Shandong Peninsula, China

摘要: The accelerated construction of general infrastructure with global urbanization necessitates the massive input materials. huge material and waste output throughout infrastructure's lifecycle have led to severe resource depletion accumulation potential environmental risks. systematic evaluation typical stocks is very important study regional availability explore sustainable development modes under intensive human activities. In this study, we build a stock model for highway system that based on theory metabolism. We analysed scale structures its effects in Shandong Peninsula. following results are shown: 1) total entire was 1933.57 Mt 2013, six materials largest inputs were stones, fly ash, lime, cement, mineral powder asphalt, which together comprised 99.8% stocks; 2) material-driven impacts mainly originated from production stages, main damage types fossil fuels, inhalable inorganics, climate change land use; 3) end products supplied by itself. average transport distance different ranged 25 174 km. Steel, stone asphalt had longer than others; 4) top three parameters largely affected road length, roadway structure, cross-sectional subgrade structure. could be reduced appropriately adjusting roadways subgrades low-class roads.