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Petroleum Science and Technology Volume 34, 2016 - Issue 21
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Original Articles

High-temperature performance of gilsonite-modified asphalt binder and asphalt concrete

Aliasghar Akbari NasrekaniAsphalt and Bituminous Mixtures Division, Technical and Soil Mechanics Laboratory, Iran Ministry of Roads and Urban Development, North Kargar Street, Tehran, IranCorrespondence[email protected]
,
Koorosh NaderiDepartment of Research and Development, Technical and Soil Mechanics Laboratory, Iran Ministry of Roads and Urban Development, North Kargar Street, Tehran, Iran
,
Mostafa NakhaeiDepartment of Research and Development, Technical and Soil Mechanics Laboratory, Iran Ministry of Roads and Urban Development, North Kargar Street, Tehran, Iran
&
Nader MahmoodiniaAsphalt and Bituminous Mixtures Division, Technical and Soil Mechanics Laboratory, Iran Ministry of Roads and Urban Development, North Kargar Street, Tehran, Iran
Pages 1783-1789 | Published online: 06 Dec 2016
 
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ABSTRACT

This article investigates the effect of addition of gilsonite (natural bitumen) to asphalt binder on its rheological behavior at high temperatures through construction of complex modulus (G*) master curve using dynamic shear rheometer (DSR) test. This impact is further investigated by evaluation of performance of asphalt concrete modified with gilsonite at elevated temperatures using repeated dynamic creep test. The results showed that introduction of gilsonite to asphalt binder increases its stiffness and elasticity. Also, the results indicated that the modification of asphalt concrete with gilsonite improved rutting resistance significantly.

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