MIT Concrete Sustainability Hub - NRMCA Expanding the

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  • 1.MIT Research: Life Cycle Assessment of Residential Buildings
  • 2.MIT Concrete Sustainability Hub $10 million investment over 5 years Funded equally by RMCREF & PCA NRMCA providing technical support and guidance NRMCA and state associations to play a critical role in the technology transfer
  • 3.Goals Identify areas in which concrete excels Identify opportunities for improvement Create solid technical basis for future industry development Social Environment Economic Sustainable
  • 4.3 Research Platforms
  • 5.Concrete Science Platform: Mission Scientific breakthroughs toward reducing CO2 footprint of cement and concrete Strength with less material Lower energy processing Chemical stability
  • 6.Building Technology Platform Mission: Life Cycle Assessment (LCA) of Concrete Buildings and Pavements to Identify Impacts and Opportunities Research Topics: Material Flow Analysis LCA of commercial buildings LCA of residential buildings LCA of pavements LCCA of building materials
  • 7.Residential Buildings ResidentialBuildings: 21% CommercialBuildings: 19% Transportation: 31% Industry: 29% Greenhouse Gas Emissions
  • 8.Methodology Standardized LCA methodology critical Increase consistency of LCA MIT proposes good practices for LCA
  • 9.Methodology Transparency of data Define scope Identify system boundaries Define functional unit
  • 10.Transparency
  • 11.Life Cycle Perspective
  • 12.Functional Unit
  • 13.Structural Systems Considered Insulated Concrete Forms (ICF) Traditional Wood Framing
  • 14.Benchmark Single Family Building Phoenix Chicago 2 stories 2,400 ft2 ICF Wood
  • 15.Benchmark Multi-Family Building Phoenix Chicago 4 stories 33,763 ft2 ICF Wood
  • 16.Structures 2 stories Single Family 4 stories Multi-Family
  • 17.Energy Modeling 60 YEAR
  • 18.Benchmark Analysis CO2 equivalent Resources Water Global Warming Potential Ozone Depletion Acidification Eutrophication Smog Formation Human Toxicity Eco Toxicity Waste Land Use
  • 19.Weight of Materials(lbs/sf2)
  • 20.Embodied Emissions
  • 21.Thermal Mass Benefits
  • 22.Annual Energy Use Intensity (Chicago)
  • 23.Annual Energy Use Intensity (Phoenix)
  • 24.Impacts The GWP of the ICF house in is approximately 6%-10% lower than the light-frame wood house. Over a 60-year life cycle, the lower (5%-8% for single family, 4.4%-6.2% for multifamily) operating GWP outweighs the initially equal or higher embodied GWP for ICF buildings.
  • 25.Impacts
  • 26.Impact Reduction - Air Tightness
  • 27.Other Impact Reductions ICF - 6 in core to a 4 in core Increasing SCM (such as fly ash) from 10% to 50%. Can decrease pre-use GWP by 12-14%
  • 28.Life Cycle Cost Analysis
  • 29.Life Cycle Cost Compared to light-frame wood, ICF $2.36-$4.09/ft2 ($25-44/m2) of wall area higher in Chicago -$0.08 to $4.15/ft2 (-$1 to $45/m2) of wall area in Phoenix Over the total life cycle cost, however, ICF construction increases the price of a house by less than 5%.
  • 30.More Information Full report available from MIT Concrete Sustainability Hub at web.mit.edu/cshub. MIT Hub established by RMC Research & Education Foundations Portland Cement Association NRMCA providing technical support Transfer research into practice Visit www.nrmca.org