amin zanganeh

In this research, using asphalt decomposition test based on AASHTO-T164 standard, it is investigated how burnt oil and asphalt chips affect the properties of hot asphalt. In this study, burnt oil with different percentages was added to the worn bitumen which was extracted from the worn asphalt by extraction method and was subjected to penetration degree and softening point tests. The addition of rejuvenator increases the Marshall resistance's cause is to provide the necessary adhesion and cohesion between the aggregate and bitumen, but with the addition of a percentage of rejuvenator and increasing the penetration of bitumen, the adhesion and cohesion of bitumen and aggregates is reduced. This will reduce the durability of the samples, which is reduced with 20% of burnt bitumen oil and used in the asphalt mixture resulting from the mixing of asphalt chips and new materials. It is recommended to use 50% of asphalt chips to improve the physical properties of the mixture. . The results show the effect of burnt oil as a rejuvenator for worn bitumen and with increasing the percentage of rejuvenating material, the parameters of worn bitumen also improve and also with increasing percentage of asphalt chips (RAP) in samples without Addition of new bitumen has been made, strength and durability have also increased and consequently the Marshall ratio has also increased.