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Finding gaps in the national electric vehicle charging station coverage of the United States.
Nat Commun
January 2025
Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA, USA.
The United States federal government has invested $7.5 billion into charging infrastructure, including the National Electric Vehicle Infrastructure Program, to build fast charging stations along designated highways for long-distance car travel. We develop a consecutive coverage metric to compute the percent of United States roads (traffic-weighted) that are consecutively accessible within 500 miles of each county.
View Article and Find Full Text PDFExperimental Investigation on Macroscopic and Microscopic Mechanical Properties of Geopolymer-Stabilized Macadam.
Materials (Basel)
January 2025
School of Civil Engineering, Central South University, Changsha 410075, China.
Geopolymer, as a promising inorganic binding material, holds potential for use in constructing base layers for highway pavements. This study aims to evaluate the mechanical properties of geopolymer-stabilized macadam (GSM) at both the micro- and macro-scale by a series of tests, demonstrating that high-Ca GSM is a high-quality material for pavement base layers. The results demonstrated that GSM exhibits outstanding mechanical and fatigue properties, significantly surpassing those of cement-stabilized macadam (CSM).
View Article and Find Full Text PDFResearch on the Aging Characteristics of Simulated Asphalt Within Pavement Structures in Natural Environments.
Materials (Basel)
January 2025
College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.
The global asphalt production growth rate exceeded 10% in the past decade, and over 90% of the world's road surfaces are generated from asphalt materials. Therefore, the issue of asphalt aging has been widely researched. In this study, the aging of asphalt thin films under various natural conditions was studied to prevent the distortion of indoor simulated aging and to prevent the extraction of asphalt samples from road surfaces from impacting the aged asphalt.
View Article and Find Full Text PDFDeformation Behavior of Inconel 625 Alloy with TPMS Structure.
Materials (Basel)
January 2025
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200082, China.
Triply periodic minimal surfaces (TPMSs) are known for their smooth, fully interconnected, and naturally porous characteristics, offering a superior alternative to traditional porous structures. These structures often suffer from stress concentration and a lack of adjustability. Using laser powder bed fusion (LPBF), we have fabricated Inconel 625 sheet-based TPMS lattice structures with four distinct topologies: Primitive, IWP, Diamond, and Gyroid.
View Article and Find Full Text PDFRevolutionary bamboo crash barriers utilizing sustainable materials for enhanced road safety.
Sci Rep
January 2025
Department of Mechanical Engineering, Government Engineering College, Barton Hill, Thiruvananthapuram, Kerala, India.
Road accidents are a growing concern worldwide, and crash barriers have significantly reduced the severity of these incidents. In its pursuit of developing an eco-friendly crash barrier, India installed the world's first 200 m bamboo crash barrier, on Bombay-Pune Highway. Although its eco-friendly and recyclable design is commendable, using Bambusa balcooa infused with creosote oil and covered with High-density polyethylene (HDPE) raises substantial health and environmental issues due to the presence of toxic and carcinogenic Polycyclic aromatic hydrocarbons (PAHs).
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