Polymer-Modified Asphalt Properties Related to Asphalt Concrete Performance

The extreme environmental conditions in Canada require the use of asphalt cement that can provide a high resistance to low-temperature cracking during the winter season and a high resistance to rutting due to the elevated temperatures in the summer. Earlier studies showed that such desired improvements in the quality of asphalt cement could be achieved using polymer-modified asphalt (PMA) cement. This paper presents a three-phase experimental program that was carried out to evaluate the expected performance of asphalt concrete mixtures with PMA compared to asphalt concrete mixtures with conventional and air-oxidized asphalt binders. The results of this study show that PMA in asphalt concrete mixes would significantly improve the resistance to cracking (loading and low-temperature). Key words: asphalt mixtures, polymer-modified asphalt, conventional asphalt cement, air-oxidized asphalt, testing.

Download Full-text

Evaluation of Mechanical properties for polypropylene Modified Asphalt concrete Mixtures

International Journal of Scientific Research and Management ◽

10.18535/ijsrm/v5i12.28 ◽

2017 ◽

Vol 5 (12) ◽

pp. 7797-7801 ◽

Cited By ~ 1

Author(s):

Safaa Moubark ◽

Farag Khodary ◽

Ayman Othman

Keyword(s):

Mechanical Properties ◽

Low Temperature ◽

Asphalt Concrete ◽

Road Traffic ◽

Modified Asphalt ◽

Concrete Mixtures ◽

Low Temperature Cracking ◽

Asphalt Modification ◽

Indirect Tensile ◽

Polymer Modified Asphalt

It is noticeable that the increase of road traffic during the last two decades in addition to the insufficient degree of maintenance caused an accelerated deterioration of road structure. These roads show early signs of distress such as rutting, cracking, low temperature cracking, ageing and stripping. Heavier loads and higher traffic volume demand higher performance of pavement. Excellent performance of pavement requires bitumen that is less susceptible to high temperature, rutting or low temperature cracking. Several additives are used to increase the performance of bitumen and the quality of the produced mixtures. Polymers are considered the most widely used additives in asphalt modification that give better performance. The performance of the Polymer-modified asphalt depends on the type and the level of modification the used polymer. The choice of modification level and t modification type depends on the physical properties of the polymer, and its compatibility with bitumen. The polymer can be loosely classified into two categories, Plastomers and Elastomers. The results indicated that, the addition of polypropylene generally improved the mechanical properties of the mixture regardless of the percentage of polymers that added and (PP) content of 5%. it can be noticed that the performance of PP-modified asphalt mixtures is better compared with unmodified asphalt concrete mixtures modifier because it has the highest Marshall Stiffness, indirect tensile strength and unconfined compressive strength

Download Full-text

Full-Scale Pavement Testing of a High Polymer-Modified Asphalt Concrete Mixture

Journal of Testing and Evaluation ◽

10.1520/jte20210283 ◽

2021 ◽

Vol 50 (2) ◽

pp. 20210283

Author(s):

Jhony Habbouche ◽

Murugaiyah Piratheepan ◽

Elie Y. Hajj ◽

Sailesh Bista ◽

Peter E. Sebaaly

Keyword(s):

Asphalt Concrete ◽

Full Scale ◽

Concrete Mixture ◽

High Polymer ◽

Modified Asphalt ◽

Pavement Testing ◽

Polymer Modified Asphalt

Download Full-text

Full-Scale Pavement Testing of a High Polymer Modified Asphalt Concrete Mixture

10.1007/978-3-030-46455-4_122 ◽

2021 ◽

pp. 959-966

Author(s):

Jhony Habbouche ◽

Peter E. Sebaaly ◽

Elie Y. Hajj ◽

Murugaiyah Piratheepan

Keyword(s):

Asphalt Concrete ◽

Full Scale ◽

Concrete Mixture ◽

High Polymer ◽

Modified Asphalt ◽

Pavement Testing ◽

Polymer Modified Asphalt

Download Full-text

Polymer Modified Asphalt Concrete for Environmental Liners

Polymer Modified Asphalt Binders ◽

10.1520/stp17841s ◽

2009 ◽

pp. 330-330-11

Author(s):

RL Terrel

Keyword(s):

Asphalt Concrete ◽

Modified Asphalt ◽

Polymer Modified Asphalt

Download Full-text

Fracture toughness of polymer-modified asphalt concrete at low temperatures

Canadian Journal of Civil Engineering ◽

10.1139/l02-101 ◽

2003 ◽

Vol 30 (2) ◽

pp. 406-413 ◽

Cited By ~ 50

Author(s):

Kwang W Kim ◽

Seung Jun Kweon ◽

Young S Doh ◽

Tae-Soon Park

Keyword(s):

Fracture Toughness ◽

Low Temperature ◽

Asphalt Concrete ◽

Low Temperatures ◽

Asphalt Binder ◽

Polymer Modification ◽

Modified Asphalt ◽

Temperature Damage ◽

Polymer Modified Asphalt ◽

Styrene Butadiene

The fracture toughness of asphalt concrete increases at low temperature and then decreases at temperatures below a certain level. Some polymers are known to have the property of improving the temperature susceptibility of asphalt binder at low temperatures. Therefore, this study evaluated the fracture toughness (KIC) of some polymer-modified asphalt concretes. Low-density polyethylene (LDPE), styrenebutadienestyrene (SBS), and a mixed polymer of LDPE and SBS were used in this study. The fracture toughness KIC of normal asphalt concrete was compared with that of polymer-modified asphalt (PMA) concrete, and the effectiveness of polymer modification against falling values of KIC was evaluated at low temperatures. The results showed that PMA concretes, in general, showed better KIC than normal asphalt concretes, and the temperature at which the highest KIC was obtained was lower than that in the case of normal asphalt concrete. Therefore, the PMA concretes evaluated in this study had better fracture resistance than normal asphalt at low temperatures.Key words: asphalt concrete, polymer-modified asphalt, PMA, fracture toughness, differential thermal contraction, low-temperature damage.

Download Full-text