Waste Foundry Sand as an Alternative Material in Road Construction

Vivian Silveira dos Santos Bardini, Luis Miguel Klinsky, Antonio Albuquerque (), Luís Andrade Pais and Fabiana Alves Fiore ()
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Vivian Silveira dos Santos Bardini: School of Technology, State University of Campinas, Pascoal Marmo St, 1888, Limeira 13484-332, Brazil
Luis Miguel Klinsky: CCR Group, Professora Maria do Carmo Guimarães Pellegrini Avenue, 200, Jundiaí 13209-500, Brazil
Antonio Albuquerque: GeoBioTec, Department of Civil Enginenering and Architecture, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
Luís Andrade Pais: GeoBioTec, Department of Civil Enginenering and Architecture, Universidade da Beira Interior, 6201-001 Covilhã, Portugal
Fabiana Alves Fiore: Institute of Science and Technology, São Paulo State University, Presidente Dutra Road, km 138.5, São José dos Campos 12247-004, Brazil

Sustainability, 2025, vol. 17, issue 6, 1-16

Abstract: The generation of solid waste and the use of non-renewable natural resources in the foundry industry are environmental challenges that require the search for solutions that guarantee the application of circular economy and cleaner production principles. Studies on the reuse of Foundry Sand Waste (FSW) generated in this process can guarantee the minimization of the current environmental impact and contribute to the achievement of sustainability in the industrial sector. The objective of this study is to assess the feasibility of utilizing WFS in the construction of pavement bases and sub-bases, in combination with sandy soil and hydrated lime. The laboratory experimental program included the evaluation of compaction characteristics, California Bearing Ratio (CBR), compressive strength, and resilient modulus. The results indicate that the addition of 25% and 50% WFS yields predicted performance levels ranging from good to excellent. The inclusion of hydrated lime enables the mixtures to be employed in sub-bases and bases, while the increased WFS content further enhances load-bearing capacity by up to 60% and 75% for 25% and 50% WFS, respectively.

Keywords: waste foundry sand; waste valorization; pavement; road construction (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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