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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Inocente Domingos, Matheus David [1] ; Faxina, Adalberto Leandro [2] ; Bernucci, Liedi Legi Bariani [3]
Total Authors: 3
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: Road Materials and Pavement Design; v. 22, n. 8, p. 1860-1880, AUG 3 2021.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 13/20483-6 - Effects of Different Creep and Recovery Times on the Rheological Properties of Modified Asphalt Binders
Grantee:Matheus David Inocente Domingos
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/17584-8 - Repeated creep tests with Hot-Mix asphalt (HMA) mixtures: a case study involving modified asphalt binders with similar high-temperature performance grades
Grantee:Matheus David Inocente Domingos
Support Opportunities: Scholarships abroad - Research Internship - Doctorate