Mechanical Performance and Life Cycle Assessment of Soil Stabilization Solutions for Unpaved Roads from Northeast Brazil

Luiz Heleno Albuquerque Filho, Michéle Dal Toé Casagrande, Mario Sergio de Souza Almeida (), Weiner Gustavo Silva Costa and Paulo Ricardo Lemos de Santana
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Luiz Heleno Albuquerque Filho: National Department of Transport Infrastructure (DNIT), Federal District, Brasília 70040-902, Brazil
Michéle Dal Toé Casagrande: Department of Civil and Environmental Engineering, University of Brasília (UnB), Federal District, Brasília 70297-400, Brazil
Mario Sergio de Souza Almeida: National Department of Transport Infrastructure (DNIT), Federal District, Brasília 70040-902, Brazil
Weiner Gustavo Silva Costa: Center for Exact Sciences and Technology, Federal University of Reconcavo da Bahia (UFRB), Cruz das Almas 44380-000, Brazil
Paulo Ricardo Lemos de Santana: Center for Exact Sciences and Technology, Federal University of Reconcavo da Bahia (UFRB), Cruz das Almas 44380-000, Brazil

Sustainability, 2024, vol. 16, issue 22, 1-25

Abstract: This article presents the results of laboratory tests conducted to identify the granulometric stabilization and chemical improvement techniques used in an experimental segment of the unpaved BR-030 highway in the Maraú Peninsula, Bahia. The segment was designed to evaluate the performance of primary coating sections stabilized with sand, clayey gravel, reclaimed asphalt pavement (RAP), and simple graded crushed stone (GCS), as well as chemically improved with Portland cement and hydrated lime. The laboratory campaign focused on mechanical resistance, resilient modulus, and permanent deformation tests. In this research, chemical improvement with the addition of 2% Portland cement presented the most promising results for potential application in the section of the BR-030 highway intended to remain unpaved. Additionally, a life cycle assessment (LCA) revealed that mechanical stabilization of the primary coating has the lowest environmental impacts, making it a suitable and sustainable option among stabilization methods.

Keywords: unpaved road; soil stabilization and improvement; resilient modulus; permanent deformation; life cycle assessment (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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