<b>Cost-benefit analysis of the construction of different flexible pavement structures considering the axle load and type of binder

Autores

  • Lucas Dotto Bueno Universidade Federal de Santa Maria
  • Luciano Pivoto Specht Universidade Federal de Santa Maria
  • Deividi da Silva Pereira Universidade Federal de Santa Maria
  • Jeancarlo Ribas Universidade Regional do Noroeste do Estado do Rio Grande do Sul

DOI:

https://doi.org/10.4025/actascitechnol.v38i4.28497

Palavras-chave:

fatigue, asphalt pavement, modified binders.

Resumo

The status of Brazilian highways reflects a deficient pavement performance when they are subjected to loadings imposed by heavy traffic. Current legislation, as enacted by Contran (National Traffic Council), has increased the axle weight limit for cargo vehicles by up to 10%. Therefore, the aim of this study was to determine a cost-benefit ratio by using different types of structures, asphalt binders and load intensities. Typical pavements were determined and then analyzed by the software AEMC (SisPav) to obtain the horizontal tensile strain (εt) values at the bottom of the asphalt concrete layer and, later, the NFATIGUE value. It was found that the increase in weight, within values covered by legislation, might result in a reduction of approximately 50% in the NFATIGUE value for the pavement structures analyzed. As for economic impact, the same weight increase caused a mean increase of 120% in the cost of repeated loading on pavement structures (R$ NFATIGUE-1). It was also observed that structures with more robust asphalt concrete layers can provide the best R$ NFATIGUE-1 ratios. The best results for granular materials were found with thinner layers, associated with a thicker coating. The benefits of modified binders were shown by the analyses of the best structural options: both the polymer-modified binder and the rubber asphalt binder offer significant structural and economic improvements to the structure.

 

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Biografia do Autor

Lucas Dotto Bueno, Universidade Federal de Santa Maria

Aluno de Mestrado da UFSM

Luciano Pivoto Specht, Universidade Federal de Santa Maria

Tem experiência na área de Engenharia Civil, com ênfase em Geotecnia/Pavimentação/Transportes, atuando principalmente nos seguintes temas: infra-estrutura de transportes, pavimentação, concreto asfáltico e meio ambiente.

Deividi da Silva Pereira, Universidade Federal de Santa Maria

Trabalha como pesquisador/docente na UFSM atuando no curso Engenharia Civil e no Programa de Pós Graduação em Engenharia Civil nas áreas de Pavimentação.

Jeancarlo Ribas, Universidade Regional do Noroeste do Estado do Rio Grande do Sul

É professor do Curso de Engenharia Civil da UNIJUI.

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Publicado

2016-08-26

Como Citar

Bueno, L. D., Specht, L. P., Pereira, D. da S., & Ribas, J. (2016). <b>Cost-benefit analysis of the construction of different flexible pavement structures considering the axle load and type of binder. Acta Scientiarum. Technology, 38(4), 445–453. https://doi.org/10.4025/actascitechnol.v38i4.28497

Edição

Seção

Engenharia Civil

 

0.8
2019CiteScore
 
 
36th percentile
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0.8
2019CiteScore
 
 
36th percentile
Powered by  Scopus