Investigation the effect of newly used polymer modified bitumen on the performance of hot mix asphalt containing reclaimed asphalt pavement

The current research focuses on investigating the effect of using reclaimed asphalt pavement (RAP) on performance of hot mix asphalt (HMA) prepared with polymer modified bitumen (PMB) binder. This PMB used for the first time with HMA contained RAP. The mechanical properties and performance of HMA were assessed using several standard tests including Marshall, indirect tensile strength, creep compliance, and wheel track test. The RAP replacement was conducted up to 70% of total aggregate in HMA with an increment of 10%. The results of investigation showed, that the use of PMB binder prepared by addition novolac (phenol formaldehyde solid resin) and hexamine to conventional bitumen, significantly improved the performance of HMA contained RAP. Also, the optimum percentage of RAP replacement was found to be 50% of total aggregate in HMA. For this level of replacement, the rut depth reduced up to 38% of its original value.

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Laboratory Comparison of Rejuvenated 50% Reclaimed Asphalt Pavement Hot-Mix Asphalt with Conventional 20% RAP Mix

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2633-09 ◽

2017 ◽

Vol 2633 (1) ◽

pp. 69-79 ◽

Cited By ~ 6

Author(s):

Ram Kumar Veeraragavan ◽

Rajib B. Mallick ◽

Mingjiang Tao ◽

Martins Zaumanis ◽

Robert Frank ◽

...

Keyword(s):

Hot Mix Asphalt ◽

Asphalt Pavement ◽

Field Trials ◽

Reclaimed Asphalt Pavement ◽

Moisture Susceptibility ◽

Reclaimed Asphalt ◽

Cracking Potential ◽

Waste Vegetable Oil ◽

Indirect Tensile ◽

Performance Grading

The Maine Department of Transportation (DOT) currently allows 20% reclaimed asphalt pavement (RAP) in base and intermediate courses. To help the Maine DOT decide whether RAP could be increased to 50%, this study evaluated the critical laboratory properties of hot-mix asphalt with 50% RAP materials and rejuvenator. The scope of work consisted of preparing 20% and 50% RAP mixes with and without rejuvenators and testing compacted specimens for their volumetric properties, moduli, indirect tensile strength, moisture susceptibility, and low- and intermediate-temperature cracking potential. Two rejuvenators were used: ( a) generic waste vegetable oil and ( b) proprietary, commercially available rejuvenator. Virgin binder, extracted RAP binder, and extracted binder from recycled mixes were tested for continuous performance grading. The results showed that rejuvenators improved the properties of high RAP mixes, and the performance of rejuvenated 50% RAP mixes was equal to that of the currently allowed 20% RAP mixes. Results from semicircular bending tests were used to evaluate and quantify the effect of rejuvenators on mixes with high RAP content. Field trials of 50% RAP mixes were recommended as a result of the study.

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Study on the Recycling Method for Drainage Asphalt Pavement and Evaluation for its Durability

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.723.664 ◽

2013 ◽

Vol 723 ◽

pp. 664-669 ◽

Cited By ~ 2

Author(s):

Atsushi Kawakami ◽

Kazuyuki Kubo ◽

Iwao Sasaki ◽

Takashi Kano

Keyword(s):

Asphalt Pavement ◽

Recycled Aggregate ◽

Reclaimed Asphalt Pavement ◽

Modified Bitumen ◽

Aggregate Gradation ◽

Reclaimed Asphalt ◽

Porous Asphalt ◽

Asphalt Materials ◽

National Highway ◽

Polymer Modified Bitumen

In Japan, drainage asphalt pavement (DAP) is widely used especially on the highway and the express way. However, because of the existing porous asphalt materials consist of DAP use polymer modified bitumen, and the aggregate gradation of DAP is differ from conventional mixture, it is difficult to use those porous asphalt materials as the recycled aggregate for reclaimed asphalt pavement. Therefore, the recycling method for recycled DAP which were consisted of recycled porous asphalt materials and virgin aggregates has not been established yet. This paper describes that the recycling method for recycled DAP was considered, and the workability and five years durability was also verified by trial construction of the recycle DAP and new DAP which were consisted of virgin aggregate on the national highway.

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