Abstract
This study presents a comprehensive pollutant reduction rating system for hot mix asphalt (HMA) with three Level I indices and ten Level II indices, covering various aspects in HMA pollutant emissions, energy consumption, and exhausts from construction equipment. The pollutant emission reduction effects are investigated not only in the laboratory for modified asphalt mixtures with various mixture gradation and binder types but also in the field for several warm mix asphalt (WMA) projects. Furthermore, energy consumption and emission data during pavement construction are obtained from 58 in situ highway projects in 10 provinces of China. Based on the hierarchical clustering method and Bayesian discriminant analysis, individual ranking systems are developed to quantify pollutant emission reduction effects and energy consumption. Subsequently, a comprehensive reduction rating system is established based on the analytic hierarchy process and approximation methods. A case study is demonstrated to implement the proposed system for the assessment of emission reduction effects.
Highlights
The development of low-carbon economy and society is currently a strategic focus around the world [1,2,3]
This study presents a comprehensive pollutant reduction rating system for hot mix asphalt (HMA) with three Level I indices and ten Level II indices, covering various aspects in HMA pollutant emissions, energy consumption, and exhausts from construction equipment
This study develops a comprehensive rating system for pollutant emission reduction and energy-saving effect of asphalt pavement construction regarding energy conservation, quantitative mechanical emission discharges, and reduction rate of pollutant emissions of asphalt mixtures with the following key contributions
Summary
The development of low-carbon economy and society is currently a strategic focus around the world [1,2,3]. Various green building assessment systems have been established in the past decade, such as BREEAM of UK [6], LEED of USA [7, 8], Ecological Architecture Guidelines LNB of Germany [9], International Organization GBTool in which Canada and other nations participated [10], and NABERS in Australia [11, 12] These rating systems developed specific standards and scoring systems to establish a healthy and comfortable living environment, save resources, and decrease the effect of pollutants on the environment, which are suitable for site planning, land use, energy conservation, renewable energy utilization, and indoor and outdoor environmental quality. A case study is demonstrated in this paper for the Haihe Tunnel project in Tianjin to evaluate the emission reduction effects of the WAM-flame retardant mixture
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