A Roadmap for Missouri: Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations [Summary]
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A Roadmap for Missouri: Assessing Needs an Implementation Framework for Incorporating Environmental Product Declarations [Summary]



English

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    This report details the Missouri Department of Transportation’s activities within the Federal Highway Administration’s Climate Challenge program. The purpose of the program was three-fold, 1) to increase knowledge of environmental product declarations (EPDs) within the Missouri asphalt and concrete industry, 2) to assess the current state of Missouri EPDs and compare with appropriate regional and national benchmarks, and 3) to provide recommendations for lowering the global warming potential (GWP) of asphalt and concrete mixtures. Various government and private entities across the U.S. are at disparate positions regarding the requirement and application of EPDs. The ultimate goal of this process is to assess the state- of-the practice in Missouri, to support future informed decision-making. Per-phase GWP benchmarks for Missouri’s asphalt EPDs were determined as per NAPA’s benchmarking system for asphalt mixtures. However, limited data from asphalt plants in Missouri were available. The asphalt mixtures were also assessed to identify carbon-intensive mixture types and processes. Based on the findings, recommendations were made to lower the GWP of the asphalt mixtures to conform to the benchmarks. Very few concrete EPDs currently exist in Missouri, and none have been specifically created for MoDOT concrete mixtures. The existing EPDs are all consistent with NRMCA regional benchmarks. With relatively small allowable increases to the SCM content within the specifications or adoption of pavement Performance Engineered Mixtures (PEM), all concrete mixtures could achieve the US General Services Administration’s GWP benchmarks with most exceeding the top 20% category. For MoDOT to set feasible benchmarks within the state, more mixture-specific EPDs need to be generated and collected.
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