Quantitative Analysis of Carbon Emissions from Highway Construction Based on Life Cycle Assessment

Shuohan Gao, Xuexin Liu (), Chunying Lu, Haixiao Zhang, Xinjun Wang and Yaping Kong ()
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Shuohan Gao: China Academy of Transportation Sciences, Beijing 100029, China
Xuexin Liu: China Academy of Transportation Sciences, Beijing 100029, China
Chunying Lu: China Academy of Transportation Sciences, Beijing 100029, China
Haixiao Zhang: Henan Transport Investment Shangluo Expressway Co., Ltd., Zhengzhou 450016, China
Xinjun Wang: China Academy of Transportation Sciences, Beijing 100029, China
Yaping Kong: China Academy of Transportation Sciences, Beijing 100029, China

Sustainability, 2024, vol. 16, issue 14, 1-14

Abstract: Carbon dioxide (CO 2 ) emissions from the construction of road infrastructure have been of growing interest in recent years. This paper proposes a binary statistical method for highway construction based on project cost control and a construction management system. A quantitative analysis of the CO 2 emissions from highway construction activities was also conducted to guide the formulation of a carbon reduction strategy. Taking an expressway in central China as a case study, the CO 2 emissions from different construction activities were calculated. The results revealed that the CO 2 emissions for the whole construction project reached 10,605.2 t·km −1 ·lane −1 , with the raw material production and on-site construction phases accounting for 95.2% and 4.8%, respectively. The values for bridge and tunnel engineering were much higher than those for other engineering types. In the raw material production phase, steel and cement production contributed the most to emissions (more than 99%). During the on-site construction phase, diesel and electricity consumption contributed 90% to CO 2 emissions, especially from earthwork, subgrade protection, bridge engineering, tunnel excavation, and pavement surfacing. Accordingly, efforts should be focused on the key points and directed toward using recycled and low-carbon materials and improving working efficiency, machinery performance, and construction technology.

Keywords: carbon dioxide; life cycle assessment (LCA); highway construction; binary statistical method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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