Method to Assess the Use of New and Recycled Materials in Pavements.

摘要

This report includes the results of a research project aimed at developing a comprehensive analysis framework for evaluating new and recycled materials to be used in pavements in Michigan. Two basic components of the framework are: (i) Engineering performance evaluation and (ii) Sustainability evaluation. Engineering performance evaluation included several options for each kind of material used at different layers of pavements. For asphalt pavements, there are three options. First option is based on the field data to be supplied by the proposer of a new/recycled material. Second option is laboratory performance data such as the push pull fatigue, flow number and IDT strength. The third option involves prediction of performance using Level 1 inputs in Pavement ME Design software. For concrete pavements and unbound layers, there are two options. First option, similar to asphalt pavements, is the field data. The second option is analysis using the Pavement ME Design software. For other types of materials, field data is required. Once data for any option is presented to MDOT (by an entity), MDOT can input these data in the NewPave software developed as part of this project to calculate an Engineering Performance Score (PSE). Second stage of the analysis framework presented in this report is the sustainability analysis. The sustainability analysis of a new material includes three basic components: (1) Environmental, (2) Economic and (3) Social analyses. At the end of analysis of each sustainability component, a performance score based on sustainability (PSS) is computed. Then the sustainability and the engineering performance scores are combined to compute an overall Performance Score (PS). This final Performance Score (PS) will be used by MDOT to decide whether to try the proposed new/recycled material in MDOT-administered roadways.