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Resurfacing case study

SC-114 Rehabilitation

Painel and São Joaquim, Brazil

PROJECT

SC-114 Rehabilitation Painel and São Joaquim, Brazil


  • 2015-2017
    Year

  • Brazil
    Country

  • Damaged/aged Pavement
    Challenge

  • 75000 mT (83000 short tons)
    Mixture Quantity

  • HiMA
    Enabling Technology

  • Roadways
    Category

  • Resurfacing
    Subcategory

Introduction

Santa Catarina is one of Brazil’s southernmost states. The region is characterized by a high-temperature gradient where summer temperatures can reach 32°C (90°F), and drop to -5°C (23°F) in the winter. In 2015, the 55 km (34 mi) long stretch of SC-114 roadway connecting the towns of São Joaquim and Painel needed repair.


Challenge

SC-114 needed rehabilitation due to fatigue damage and occasional thermal cracking. The original repair plan called for full-depth reclamation (FDR) with cement. However, timing and safety concerns related to traffic interruption associated with the full depth replacement process made the local road authority DEINFRA-SC reconsider the initial plan.

Resolution

Compasa, a leading Brazilian road construction company, provided an alternative design. The design called for milling of the existing wearing course; paving 2.5 cm (1 in) of HiMA-enabled SAMI layer; followed by 4 cm (1.6 in) HiMA-enabled wearing course. The ultra-thin HiMA SAMI layer is designed to provide reflective crack protection, while the wearing course would give the pavement long-term distress resistance. The alternative design allowed for much faster project completion time and a substantial reduction in traffic interruption. DEINFRA-SC achieved the desired benefits at a similar or lower cost overall. 

Compasa manufactured the Compaflex HiMA polymer modified bitumen. The asphalt mixtures were produced between 165-170°C (329 – 338°F) and paved at a 143-154°C (290 - 309°F) range. As of June 2020, the pavement has stood up to the test.  

 

 

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