This invited student presentation features asphalt pavement compaction LCA with the use of intelligent compaction equipment.
Life-Cycle Assessment and Cost Analysis of Using Intelligent Compaction for Construction of Asphalt Pavement Layers
David Corona, California State University, Los AngelesShow Abstract
Siavash Aval, California State University, Los Angeles
Mehran Mazari, California State University, Los Angeles
Compaction of pavement layers is one of the most critical elements of the construction process that affects the performance of the final product as well as preventing premature failure of the structure. The construction process involves a lot of interactions with the environment in terms of utilizing natural resources and no-reproducible sources of energy. A comprehensive Life Cycle Assessment (LCA), also known as a cradle to grave analysis, can evaluate the environmental impact of the pavement structure from the production of the material through the construction process, the use phase, recycling and end of life. Furthermore, a Life Cycle Cost Analysis (LCCA) can estimate the owner and user cost over the life cycle of the pavement system. Although these analyses have been the focus of several studies focusing on the materials and production as well as the use phase, the evaluation of the construction phase and impact of utilizing various construction techniques needs more attention. The conventional method of compaction for different pavement layers include the use of a dynamic vibratory roller combined with quality testing at random spots across the construction site. However, the use of Intelligent Compaction methodology has been gained more attention over the past several years due to the provision of a database for the entire construction area with the help of a vibration sensor combined with a Global Positioning System (GPS). In this study, we have evaluated the impact of using intelligent compaction technology for the compaction of a hot mix asphalt overlay through a preliminary LCA and LCCA models. We have shown that utilizing the improved compaction technology can reduce greenhouse gas emissions and provide cost-saving during construction and maintenance stages. Further analyses will be desirable upon the availability of a more robust database.
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