LABORATORY PERFORMANCE OF ASPHALT CONCRETE WEARING COURSE MIX CONTAINING RETONA 60

• Main Author: Effendie, Ervan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/2960
• Institution: Institut Teknologi Bandung

Retona 60 is produced through a refining and extraction process from Buton rock asphalt. The process does not remove all the minerals from the Buton rock asphalt, but only to the extent that refined Buton Asphalt (Retona) with an asphalt content of 60 % and a mineral content of 40 % is obtained. This thesis describes a laboratory investigation of binders containing various amounts of Retona 60 bitumen and of asphalt concrete wearing course mix made with different blends of Retona 60 and 60 pen grade bitumen. For purposes of comparison, the characteristics of a mix made with 60 pen grade bitumen (conventional mix) were also determined. Compared to pen 60 bitumen, the binder containing Retona 60 bitumen has lower penetration and higher softening point; temperature susceptibility reduces with increasing Retona 60 bitumen content. The blends investigated in the mixes were in the following proportions: 30/70, 40/60 and 50/50, Retona 60/ 60 pen grade bitumen by weight of blend. The laboratory investigation included Marshall analysis, measurement of resistance to deformation in the wheel tracking test and measurement of resilient modulus. All of the mixes containing Retona 60 comply with Marshall mix design criteria specified by Bina Marga. The resistance to water damage of mixes containing Retona 60 is somewhat lower than that of conventional mix but in all cases meets the Bina Marga requirement. As Retona 60 content is increased, resistance to permanent deformation, stiffness modulus and Marshall stability and quotient increase. No optimum content is apparent and the amount of Retona 60 used will most likely be dictated by cost considerations and by the particular requirements of individual projects.