| Grant number: | 14/17584-8 |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| Start date: | October 01, 2014 |
| End date: | December 31, 2014 |
| Field of knowledge: | Engineering - Civil Engineering - Transportation Infrastructure |
| Principal Investigator: | Adalberto Leandro Faxina |
| Grantee: | Matheus David Inocente Domingos |
| Supervisor: | Hussain U. Bahia |
| Host Institution: | Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| Institution abroad: | University of Wisconsin-Madison (UW-Madison), United States |
| Associated to the scholarship: | 13/20483-6 - Effects of Different Creep and Recovery Times on the Rheological Properties of Modified Asphalt Binders, BP.DR |
Abstract Since the development of the multiple stress creep and recovery (MSCR) test by the US Federal Highway Administration, research studies have been conducted to display and examine the rheological properties of asphalt binders at high in-service temperatures and test conditions other than those established by the American standards. To further explore the potential of the MSCR test as a high-temperature binder test and verify its capability of predicting the rutting resistance of the mixture in the laboratory, this research study mainly aimed at analyzing and describing the creep-recovery behavior of dense-graded hot-mix asphalt (HMA) mixture samples prepared with several modified asphalt binders. One 50/70-penetration grade base material (PG 64-xx) from the Lubnor-Petrobras refinery, crumb rubber, polyphosphoric acid (PPA) and five types of polymers (Elvaloy®, SBS, SBR, EVA and PE) were used to prepare 12 formulations with the same high-temperature performance grade (PG 76-xx), six of which have just one modifier (AC+modifier) and the other six have one modifier and PPA (AC+modifier+PPA). It is expected that the great variety of materials, together with the promising results obtained in the literature regarding the repeated creep tests with binders and the correlations between the results of asphalt binders and asphalt mixtures, will lead to (1) a more precise estimate of the contribution of the modifier type (s) on the susceptibility of the mixture to rutting; (2) an indication of the mixtures with better and worse performances; and (3) an accurate identification of the similarities and differences among these varied dynamic creep responses. (AU) | |
| News published in Agência FAPESP Newsletter about the scholarship: | |
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