Modelling and permanent deformation analysis of low-density polyethylene (PE)-modified bitumens and asphalts

Autor(es)

Inocente Domingos, Matheus David ^[1] ; Faxina, Adalberto Leandro ^[2] ; Bernucci, Liedi Legi Bariani ^[3]

Afiliação do(s) autor(es)

^[1] Fed Univ Technol, Acad Dept Civil Construct, Curitiba, Parana - Brazil

^[2] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Transportat Engn, Sao Carlos - Brazil

^[3] Univ Sao Paulo, Polytech Sch, Dept Transportat Engn, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Road Materials and Pavement Design; v. 22, n. 8, p. 1860-1880, AUG 3 2021.
• Citações Web of Science: 1

Resumo

The present investigation aimed at evaluating the permanent deformation responses of bitumens modified with low-density polyethylene - either with or without polyphosphoric acid (bitumen+PE and bitumen+PE+PPA) - and by considering bitumen tests (MSCR - multiple stress creep and recovery), rheological models and asphalt tests (FN - flow number). The formulations were graded as PG 76-xx and the standardised MSCR tests were conducted at 64, 70 and 76 degrees C. The bitumen+PE+PPA showed a higher resistance to permanent deformation than the bitumen+PE according to MSCR and FN tests in a general context, even though none of the formulations may be assumed as overly stress sensitive (Superpave (R) parameter lower than 75% in all cases), neither they depicted high levels of elasticity due to their small per cent recoveries (all lower than 25%). It was also hypothesised that the contributions of PE and PPA on the increases in the stiffness of the bitumen+PE+PPA were made individually. (AU)

• Processo FAPESP: 06/55835-6 - Caracterização e modelagem de propriedades reológicas de ligantes, de mástiques e de misturas asfálticas
• Beneficiário: Adalberto Leandro Faxina
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 13/20483-6 - Efeitos de Diferentes Tempos de Fluência e Recuperação nas Propriedades Reológicas de Ligantes Asfálticos Modificados
• Beneficiário: Matheus David Inocente Domingos
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/17584-8 - Ensaios de Fluência-Recuperação com misturas asfálticas: um estudo de caso envolvendo ligantes asfálticos de mesmo grau de desempenho em temperaturas altas
• Beneficiário: Matheus David Inocente Domingos
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado