scholarly journals Evaluation of permanent deformation of asphalt rubber using multiple stress creep recovery tests and flow number tests

TRANSPORTES ◽  
2020 ◽  
Vol 28 (2) ◽  
pp. 76-86
Author(s):  
Luis Miguel Gutierrez Klinsky ◽  
Vivian Silveira dos Santos Bardini ◽  
Valeria Cristina De Faria
Keyword(s):  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Creep Recovery ◽  
Excellent Correlation ◽  
Flow Number ◽  
Multiple Stress ◽  
Asphalt Rubber ◽  
Modified Binders ◽  
Multiple Stress Creep Recovery

This study used the Multiple Stress Creep Recovery Test (MSCR) and the Flow number test to analyze the characteristics of asphalt rubber and its use in hot mix asphalt (HMA) regarding to their ability to withstand permanent deformation. MSCR tests were done in three commercial asphalt rubber and in the traditional asphalt binder 50/70. Flow number tests were performed in twenty four specimens of asphalt rubber mixtures and eight specimens of conventional asphalt mixtures. The results of these tests showed that all the asphalt rubber samples had lower compliance values (Jnr) in the MSCR test, which denotes that these modified binders improved the rutting resistance of HMA. This behavior was confirmed with flow number results, since the HMA produced with asphalt rubber had always higher flow number values, when compared to the conventional asphalt mixtures. The analysis of the data showed excellent correlation between Jnr values and FN values.

scholarly journals Evaluation of Petroleum Resin in Rubberized Asphalt Binder

2021 ◽  
Vol 13 (16) ◽  
pp. 9319
Author(s):  
Hyun Hwan Kim ◽  
Mithil Mazumder ◽  
Moon-Sup Lee ◽  
Soon-Jae Lee
Keyword(s):  
Thin Film ◽  
Low Temperatures ◽  
Asphalt Binder ◽  
Crumb Rubber ◽  
Creep Recovery ◽  
Dynamic Shear ◽  
Bending Beam Rheometer ◽  
Rotational Viscometer ◽  
Multiple Stress ◽  
Multiple Stress Creep Recovery

The crumb rubber modified (CRM) binder was evaluated considering the general operating temperatures of high, intermediate, and low temperatures. CRM binders were produced with four different contents (0, 5, 10, and 15%) using the base asphalt binder (PG64-22). Then, they were artificially aged by a rolling thin-film oven (RTFO) and pressure aging vessel (PAV). Superpave binder tests using a rotational viscometer (RV), dynamic shear rheometer (DSR), and bending beam rheometer (BBR) was applied to characterize the performance of the original and aged binders. Multiple stress creep recovery (MSCR) tests were also performed for deeper rutting characterization. The results of this study are as follows: (1) the presence of PR increases the binder viscosity, (2) the integration of CRM greatly improved the rutting resistance of the binder, and it was found that PR also improved the rutting characteristics, and (3) it is observed that PR is detrimental to the cracking properties of CRM binders.

scholarly journals Low-Temperature Performance of Polymer-Modified Binders in Stone Mastic Asphalts

2021 ◽  
Vol 6 (4) ◽  
pp. 58
Author(s):  
Ana Dias ◽  
Hugo Silva ◽  
Carlos Palha ◽  
Joel Oliveira
Keyword(s):  
Low Temperature ◽  
Low Temperatures ◽  
Elastic Recovery ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Fatigue Cracking ◽  
Thermal Cracking ◽  
Mechanical Tests ◽  
Asphalt Mixtures ◽  
Modified Binders

When temperatures drop to significantly low levels, road pavements are subjected to thermally-induced stresses, resulting in the appearance of thermal cracking, among other distresses. In these situations, polymers can be used as asphalt binder modifiers to improve certain asphalt binder properties, such as elastic recovery, cohesion, and ductility. Polymers also minimize some of the problems of asphalt mixtures, such as thermal and fatigue cracking and permanent deformation. This work’s objective was to study the behavior of asphalt mixtures at low temperatures, mainly when using modified binders. Thus, three binders were selected and tested: a standard 50/70 penetration grade bitumen and two polymer-modified binders (PMB), obtained by adding, respectively, 2.5% and 5.0% of styrene–butadiene–styrene (SBS) in the 50/70 pen grade bitumen. Then, the PMBs were incorporated into stone mastic asphalt mixtures (namely SMA 11), which were subjected to low-temperature mechanical tests based on the most recent European Standards. The asphalt binders and mixtures evaluated in this work were tested for thermal cracking resistance, creep, elastic recovery, cohesive strength, and ductility strength. Overall, it is concluded that the studied asphalt mixtures with PMB, with just 2.5% SBS, performed adequately at low temperatures down to −20 °C.

scholarly journals Multiple Stress Creep Recovery (MSCR) Test for Determination of Waste Engine Oil Modified Asphalt Binder as Pavement Material

2022 ◽  
pp. 8-14
Author(s):  
Biruk Tadele ◽  
Emer T Quezon
Keyword(s):  
Asphalt Binder ◽  
Engine Oil ◽  
Creep Recovery ◽  
Multiple Stress ◽  
Modified Asphalt ◽  
Waste Engine Oil ◽  
Modified Asphalt Binder ◽  
Multiple Stress Creep Recovery ◽  
Modified Binder ◽  
Pavement Material

Engineers have been using modified binders to improve the quality of flexible pavements. The use of waste material is one of the solutions taken in this direction. It is for this ground that the studies emphasis on the evaluation of waste engine oil as a modifier for asphalt binder as a pavement material. In the study uses four samples extracted from 80/100 penetration grade bitumen. From four sample first sample was checked for weather requirements of asphalt binder meet or not and the three were modified with different content of engine oil (3,6 and 9%). The behaviors of both unmodified and modified binder were checked for rheological properties. Dynamic shear rheometer (DSR) was used to determine high temperature performance grade (PG) and multiple stress creep recovery tests to determine rutting resistance properties of the binder. PG analysis indicates that both aged and un-aged 3% and 6% modified binder have similar higher PG grade with the unmodified one and 9% modified to have lower PG vale. Jnr3.2 value of modified asphalt binder is lower than unmodified binder indicating that modification had improved the rutting resistance and design traffic load (ESALS). The study shows that it is possible to use waste engine oil-modified binder as a pavement material.

scholarly journals High temperature properties of modified bituminous binders produced in Poland

2019 ◽  
Vol 262 ◽  
pp. 05011 ◽  
Author(s):  
Piotr Radziszewski ◽  
Michał Sarnowski ◽  
Piotr Pokorski ◽  
Karol J. Kowalski ◽  
Jan Król
Keyword(s):  
High Temperature ◽  
Permanent Deformation ◽  
Creep Recovery ◽  
High Temperature Properties ◽  
Recovery Test ◽  
Modified Binders ◽  
Multiple Stress Creep Recovery ◽  
Bituminous Binders ◽  
Operating Temperatures ◽  
Temperature Test

Bitumen used for the construction of road pavements should exhibit adequate resistance to loads at high operating temperatures. An effective method of improving the properties of bitumen is their modification. To evaluate the high-temperature properties of bitumen, standard consistency tests and advanced rheological tests under dynamic load are conducted. The main purpose of the article is to assess the high temperature properties of modified binders produced by two major Polish producers. The assessment was based on the tests results of modified binders in the range of the standard softening point temperature test and tests in the dynamic shear rheometer (DSR) according to the requirements of Strategic Highway Research Program (SHRP) and Multiple Stress Creep Recovery Test (MSCR). It has been shown that due to the highest operating temperatures of road pavements in Poland, produced bituminous binders meet the requirements of resistance to permanent deformation with a great reserve.

scholarly journals Physicochemical and Rheological Properties of a Transparent Asphalt Binder Modified with Nano-TiO2

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2152
Author(s):  
Iran Rocha Segundo ◽  
Salmon Landi ◽  
Alexandros Margaritis ◽  
Georgios Pipintakos ◽  
Elisabete Freitas ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Softening Point ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Solar Irradiation ◽  
Creep Recovery ◽  
Polymer Modification ◽  
Nano Tio2 ◽  
Rutting Resistance ◽  
Multiple Stress Creep Recovery

Transparent binder is used to substitute conventional black asphalt binder and to provide light-colored pavements, whereas nano-TiO2 has the potential to promote photocatalytic and self-cleaning properties. Together, these materials provide multifunction effects and benefits when the pavement is submitted to high solar irradiation. This paper analyzes the physicochemical and rheological properties of a transparent binder modified with 0.5%, 3.0%, 6.0%, and 10.0% nano-TiO2 and compares it to the transparent base binder and conventional and polymer modified binders (PMB) without nano-TiO2. Their penetration, softening point, dynamic viscosity, master curve, black diagram, Linear Amplitude Sweep (LAS), Multiple Stress Creep Recovery (MSCR), and Fourier Transform Infrared Spectroscopy (FTIR) were obtained. The transparent binders (base and modified) seem to be workable considering their viscosity, and exhibited values between the conventional binder and PMB with respect to rutting resistance, penetration, and softening point. They showed similar behavior to the PMB, demonstrating signs of polymer modification. The addition of TiO2 seemed to reduce fatigue life, except for the 0.5% content. Nevertheless, its addition in high contents increased the rutting resistance. The TiO2 modification seems to have little effect on the chemical functional indices. The best percentage of TiO2 was 0.5%, with respect to fatigue, and 10.0% with respect to permanent deformation.

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