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This study reports the development and field implementation of concrete incorporating untreated bauxite residueBauxite residue (UBR) in heavy-traffic pavements. Two construction techniques were applied in a truck parking area: monolithic concreteMonolithic concrete slabs and interlocking paving blocksPaving blocks. The mixtures were first optimized in the laboratory to ensure workability, pumpability, and mechanical performance, with UBR contents of up to 75 kg/m3, considered a significant consumption for this kind of material. After validation in partnership with a concrete batching plant, the mixtures were produced on an industrial scale. For the paving blocksPaving blocks, production was completed in advance to allow 28 days of curing. Each 3 m3 batch enabled the castingCasting of about 600 blocks in 1.5 h. Approximately 2,600 blocks were required to complete the pavement, corresponding to five concrete batches. During the curing period, the site was prepared to receive the materials. In total, around 260 m2 of pavement was built: 123.6 m2 with monolithic concreteMonolithic concrete and 138.2 m2 with interlocking blocks. Both applications achieved the expected mechanical strengthsStrength. The paving blocksPaving blocks also met Brazilian standards for dimensional variation, water absorption, and abrasion resistance. Leaching and solubilization tests confirmed the safe use of UBR. Overall, the results demonstrate the technical feasibility and environmental viability of incorporating UBR in large-scale concrete applications for infrastructure.

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Development and Construction of Heavy-Traffic Pavements Made with Concrete Containing Bauxite Residue

  • 会议论文

  • 发表日期：

    2026年

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  • Roberto Cesar de Oliveira Romano,
  • Markus Samuel Rebmann,
  • Rafael Giuliano Pileggi

摘要

This study reports the development and field implementation of concrete incorporating untreated bauxite residueBauxite residue (UBR) in heavy-traffic pavements. Two construction techniques were applied in a truck parking area: monolithic concreteMonolithic concrete slabs and interlocking paving blocksPaving blocks. The mixtures were first optimized in the laboratory to ensure workability, pumpability, and mechanical performance, with UBR contents of up to 75 kg/m3, considered a significant consumption for this kind of material. After validation in partnership with a concrete batching plant, the mixtures were produced on an industrial scale. For the paving blocksPaving blocks, production was completed in advance to allow 28 days of curing. Each 3 m3 batch enabled the castingCasting of about 600 blocks in 1.5 h. Approximately 2,600 blocks were required to complete the pavement, corresponding to five concrete batches. During the curing period, the site was prepared to receive the materials. In total, around 260 m2 of pavement was built: 123.6 m2 with monolithic concreteMonolithic concrete and 138.2 m2 with interlocking blocks. Both applications achieved the expected mechanical strengthsStrength. The paving blocksPaving blocks also met Brazilian standards for dimensional variation, water absorption, and abrasion resistance. Leaching and solubilization tests confirmed the safe use of UBR. Overall, the results demonstrate the technical feasibility and environmental viability of incorporating UBR in large-scale concrete applications for infrastructure.