EVALUATION OF RUTTING PERFORMANCE OF HOT MIX ASPHALT CONTAINING POLYMER ADDITIVES

2020 ◽  
Vol 2 (2) ◽  
pp. 127-132
Author(s):  
Ahmed Eltwati ◽  
Alaa A. A. Elkaseh
Keyword(s):  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Structural Performance ◽  
Accelerated Pavement Testing ◽  
Modified Asphalt ◽  
Resistance To Deformation ◽  
Traffic Volumes ◽  
Pavement Testing ◽  
Polymer Modified Asphalt ◽  
Run Up

In recent decades, escalating traffic volumes initiate asphalt pavements revealed to larger stresses, which can create premature distresses. To enhance the resistance to distresses, modification of the asphalt mixtures has been studied extensively. The objective of this paper is to evaluate the performance of asphalt pavement made with various bitumen types and also different thicknesses. The bitumen types used were conventional asphalt (Ac 60-70) and polymer modified asphalt (PG 76-22). The thickness of asphalt samples tested was 70, 80, and 90 mm. In this study, Accelerated Pavement Testing (APT) was conducted to evaluate the rut depth in the surface of the pavement. The experiment was run up to 20,000 cycles. The results revealed polymer has a significant effect on pavement resistance to rutting. The resistance can be increased by up to 30%. In addition, the rutting occurred rapidly for the first 3,000 cycles. Beyond 3,000, the deformation is increased slowly.  On the other side, the results showed that as the HMA thickness increases as the resistance to deformation increases. We, therefore, can conclude that adding particles of polymer to HMA could improve the structural performance of pavement i.e. rutting resistance and reduce the thickness of the surface

Performance Evaluation of Polymer Modified Asphalt Mixtures

2014 ◽  
Vol 1 (2) ◽  
pp. 33-50
Author(s):  
Eslam Magdy Mohammed Deef-Allah ◽  
◽  
Ahmed Mohamady ◽  
Keyword(s):  
Performance Evaluation ◽  
Asphalt Mixtures ◽  
Modified Asphalt ◽  
Polymer Modified Asphalt

scholarly journals Mechanical Characteristics of Graphene Nanoplatelets-Modified Asphalt Mixes: A Comparison with Polymer- and Not-Modified Asphalt Mixes

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2434
Author(s):  
Laura Moretti ◽  
Nico Fabrizi ◽  
Nicola Fiore ◽  
Antonio D’Andrea
Keyword(s):  
Fatigue Resistance ◽  
Graphene Nanoplatelets ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Asphalt Mixes ◽  
Modified Asphalt ◽  
Bituminous Mixtures ◽  
Water Sensitivity ◽  
Polymer Modified Asphalt ◽  
Mechanical Performances

In recent years, nanotechnology has sparked an interest in nanomodification of bituminous materials to increase the viscosity of asphalt binders and improves the rutting and fatigue resistance of asphalt mixtures. This paper presents the experimental results of laboratory tests on bituminous mixtures laid on a 1052 m-long test section built in Rome, Italy. Four asphalt mixtures for wearing and binder layer were considered: two polymer modified asphalt concretes (the former modified with the additive Superplast and the latter modified with styrene–butadiene–styrene), a “hard” graphene nanoplatelets (GNPs) modified asphalt concrete and a not-modified mixture. The indirect tensile strength, water sensitivity, stiffness modulus, and fatigue resistance of the mixtures were tested and compared. A statistical analysis based on the results has shown that the mixtures with GNPs have higher mechanical performances than the others: GNP could significantly improve the tested mechanical performances; further studies will be carried out to investigate its effect on rutting and skid resistance.

Developing Master Curves and Predicting Dynamic Modulus of Polymer-Modified Asphalt Mixtures

2011 ◽  
Vol 23 (2) ◽  
pp. 131-137 ◽  
Author(s):  
Haoran Zhu ◽  
Lu Sun ◽  
Jun Yang ◽  
Zhiwei Chen ◽  
Wenjun Gu
Keyword(s):  
Dynamic Modulus ◽  
Asphalt Mixtures ◽  
Master Curves ◽  
Modified Asphalt ◽  
Polymer Modified Asphalt

Study on the Fatigue Property for Aged Asphalt Mixtures by Using Four Point Bending Tests

2009 ◽  
Vol 614 ◽  
pp. 289-294 ◽  
Author(s):  
Guo Jun Zhu ◽  
Shao Peng Wu ◽  
Ran Liu ◽  
Lei Zhou
Keyword(s):  
Natural Aging ◽  
Fatigue Property ◽  
Asphalt Mixtures ◽  
Bending Test ◽  
Fatigue Properties ◽  
Modified Asphalt ◽  
Four Point Bending ◽  
Aged Asphalt ◽  
Polymer Modified Asphalt ◽  
Effects Of Aging

The effects of aging on the fatigue property of polymer modified asphalt mixtures are investigated in this paper. Two kinds of aging procedures are adopted for the aging of specimens prepared with polymer modified asphalt mixtures. One is the short-time aging which means that the hot asphalt mixtures was heated in the oven for 4 hours at 135°C before compacted; The other called natural aging, with the original specimen exposed in the sunlight and subjected to the rain and temperature change for 3, 6 and 9 months. Four-Point Bending Test was conducted to evaluate fatigue properties of aged asphalt mixtures at 15°C compared with the original specimens. Test results indicate that the fatigue line of aged specimens have the same tendency as the original asphalt mixtures. However, the life of aged specimen is decreased significantly when compared with the original ones, especially of the natural aged specimens.

Georgia Department of Transportation’s Experience with Microsurfacing

1998 ◽  
Vol 1616 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Donald Watson ◽  
David Jared
Keyword(s):  
Department Of Transportation ◽  
Asphalt Emulsion ◽  
Modified Asphalt ◽  
Crack Sealing ◽  
Traffic Volumes ◽  
Henry County ◽  
Heavy Truck ◽  
Double Surface ◽  
Polymer Modified Asphalt ◽  
Pavement Noise

Microsurface mix, or microsurfacing, can be used for sealing and providing a friction surface for cracked and deteriorated surface mixes. This mix, essentially consisting of 9.5-mm (0.37-in.) screenings bonded by a polymer-modified asphalt emulsion, is economical and can be placed very swiftly. Microsurfacing is also aesthetically pleasing because of its resemblance to hot-mix asphalt. In 1990–1991, the Georgia Department of Transportation (GDOT) successfully used microsurfacing in a test section on I-75 in Henry County, which had high traffic volumes and a heavy truck concentration. Two varieties of the mix were used, and both showed little deterioration after 2 years. In 1996, GDOT opted to use microsurfacing for a 9.2-km (5.7-mi) section of I-285 in Atlanta between Conley Road and Old National Highway. This 92 lane-km (57-lane-mi) project was initiated to address the raveling and cracking in the section and improve its appearance before the 1996 summer Olympics. The I-285 project began in late May 1996 and was completed in 1 month. The microsurfacing used on I-285 has performed quite well since the project was completed. No additional problems with raveling or load cracking have been encountered. The mix has provided excellent smoothness and good friction, with a minimal increase in pavement noise levels. Microsurfacing may be suitable for use on cracked pavements in lieu of more conventional rehabilitation methods such as crack sealing, leveling, and double surface treatments.

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