Exploring life-cycle-based indicators for integrated sustainability assessment of buildings structural frames in concrete

Resumo

This paper aims at advancing on the validation of indicators of building concrete frames’ sustainability from an integrated, life cycle perspective. A case study approach investigates (i) feasibility of comparing sustainability performance of different flooring systems; and (ii) similarity between environmental indicators trends for a typical flooring system and corresponding whole superstructure. Three residential buildings are analyzed, using either prestressed concrete flat (PCF) slabs or reinforced concrete waffle (RCW) slabs and flat beams exposed to a marine environment. SimaPro 7.3 supports calculation of the environmental indicators. Service life estimation is used to ensure functional equivalence and to form a basis for life cycle costing. PCF slabs showed best functional/technical and economic results but were outperformed by RCW slabs’ environmental results. Most environmental indicators showed the same trend for both typical floor and whole superstructure.