Assessing economic and environmental performance of infill materials through BIM: a life cycle approach

PurposeInfill materials play a pivotal role in determining buildings' life cycle costing (LCC) and environmental impacts. International standards prescribe LCC and life cycle assessments (LCA) to assess materials' economic and environmental sustainability. The existing methods of LCC and LCA are tedious and time-consuming, reducing their practical application. This study sought to integrate LCC and LCA with building information modeling (BIM) to develop a swift and efficient approach for evaluating the life cycle performance of infill materials.Design/methodology/approachThe BIM model for a case study was prepared using Autodesk Revit (R), and the study included four infill materials (lightweight aggregate concrete block (LECA), autoclaved cellular concrete (AAC), concrete masonry and bricks). LCC was conducted using Revit (R) and Autodesk Insight 360 (R) to estimate costs incurred across different project phases. LCA was conducted using "One Click LCA (R)," a BIM-based platform featuring a comprehensive material inventory. Carbon emissions, acidification, and eutrophication were chosen as environmental impact factors for LCA.FindingsLECA was the preferred choice due to its lower cost and environmental impact. Its lifetime cost of $440,618 was 5.4% lower than bricks', with 2.8% lower CO2 emissions than AAC's, which were second-place options, respectively. LECA had 6.4 and 27% lower costs than concrete blocks, and AAC's carbon emissions were 32 and 58% lower than concrete blocks and bricks, respectively.Originality/valueBIM has been employed for life cycle analysis in existing literature, but its efficacy in evaluating the lifetime costs and environmental impacts of infill materials remains unexplored. The current study presents a BIM-based approach for conducting LCC and LCA of infill materials, facilitating informed decision-making during the planning phase and promoting sustainable construction practices.