Potential of using organic additive produced with kaolin-clay in bituminous roadways

Deniz Arslan; Metin Gürü; Kürşat Çubuk; Meltem Çubuk; Farshad  Farshbafian

doi:10.36909/jer.17683

Deniz Arslan Konya Technical University, Faculty of Engineering and Natural Sciences, Civil Engineering Department, 42075, Selçuklu/Konya, Turkey
Metin Gürü Gazi University, Faculty of Engineering, Chemical Engineering Department, 06570, Maltepe/Ankara, Turkey https://orcid.org/0000-0002-7335-7583
Mustafa Kürşat Çubuk Gazi University, Faculty of Engineering, Civil Engineering Department, 06570, Maltepe/Ankara, Turkey https://orcid.org/0000-0001-8155-7123
Meltem Çubuk Ministry of Transport and Infrastructure, 06500, Emek/Ankara, Turkey. https://orcid.org/0000-0002-3280-9264
Farshad Karimzadeh Farshbafian Gazi University, Faculty of Engineering, Civil Engineering Department, 06570, Maltepe/Ankara, Turkey https://orcid.org/0000-0002-3122-3376

Abstract

Roadway performance can be improved through utilizing modified bitumens and/or modified bituminous mixtures within the structure. Regarding this view, Kaolin-containing-Organic Additive Material (K-c-OAM) has been synthesized in the study. K-c-OAM is a new additive material obtained in laboratory conditions with the reaction of kaolin, a kind of clay, and ethylene glycol. 50/70 penetration grade neat bitumen has been modified by K-c-OAM in concentrations ranging from 1 % to 4 %. Modification process has been carried out at 120ºC and 20 mins of blending period. The effects of K-c-OAM on both bitumen and bituminous mixture properties have been investigated by experiments including rotational viscosity, penetration, softening point, ductility, Nicholson stripping and Marshall tests. Marshall Stability values of the bituminous mixtures have been found to be increased at a level varying between 6.4 % and 9.5 % by K-c-OAM modified bitumens.

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