Description
15-Year Review of Rubberized Asphalt: RJ-122 Pavement Performance
Davi Perini Vermelhoa, Ângelo Monteiro Pintoa, Jorge B. Sousab, Ernesto Simões Preusslerc, Felipe Costa Diasc, Diogo do Nascimento Sales dos Santosc
aInstituto Rio Metrópole
bConsulpav International, Walnut Creek, California
cDynatest Engenharia LTDA
presidencia@irm.rj.gov.br
Jorge.b.sousa@gmail.com
ABSTRACT.
This study, supported by The President of IRM (Instituto Rio Metrópole), was conducted with the purpose of developing advanced strategies for the maintenance of pavements of urban relevance, contributing both to technical efficiency and to environmental responsibility. The maintenance of the RJ-122 Highway employed rubberized asphalt produced by the controlled incorporation of scrap tire crumb rubber into the asphalt binder. The binder selection was based on Performance Grade (PG) 76-16, which met the section requirements regarding temperature, permanent deformation, and thermal variation, ensuring performance compatible with the traffic and overload conditions of the road. After 15 years of operation, the pavement preserved structural and functional characteristics equivalent to those projected for its service life, with no occurrence of thermal cracking and with permanent deformations below the established limits, except in curve segments with radius under 345 m and aggregates with Los Angeles abrasion values above 40%. The adopted solution resulted in an average cost reduction of 38.3% compared to conventional methodologies, in addition to environmental benefits through proper tire disposal and reduced consumption of raw materials.
KEYWORDS: Rubberized asphalt, Performance Grade, pavement maintenance, tire recycling.
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