Researchers

Fayez Salman – Bassam Sultan – Bassem Ali and Nagham Taleb

Published in

Tartous University Journal for Research and Scientific Studies, engineering Sciences Series, volume 6, issue 10, 2022.

Abstract

Exposure to oxygen, ultraviolet rays and changes in air temperature affect the asphalt and thus the asphalt mixture layer, through the oxidation and loss of its volatile components, and thus its molecular structure will change. This process is called aging, and it causes a change in the chemical, physical and rheological properties of asphalt, which affects its life. When aging occurs, the binder becomes more stiff, but more brittle and exposed to cracks and erosion, thus reducing the durability and service life of the asphalt layer.

Research on the mechanisms of preventing the deterioration of the properties of asphalt due to temperature, including thermally conductive materials to improve its resistance to the harmful effects resulting from it, is an important topic. The research aims to shed light on the use of graphite as an anti-aging material for asphalt binder. In this research, a laboratory study was conducted of the effect of adding graphite on the structure of the asphalt binder by testing the aging of the unmodified asphalt binder, as well as the modification of it with additions of graphite in certain proportions. To achieve what was required, the study was conducted on unmodified samples of asphalt and others modified with graphite at rates ranging (5-10-15-20) by weight of the asphalt binder, and to determine the effect of short and long-term aging on the properties of the asphalt binder, and to find its indicators. The results showed that the addition of graphite improves the resistance of the asphalt to the phenomenon and reduces the resistance of binder to the phenomenon of aging and reduces the negative impact on its properties, and the optimum ratio is (10%).

Keywords: Asphalt - short-term aging - long-term aging – graphite – penetration.

Link to full paper

http://tartous-univ.edu.sy/index.php/tartous-university/en/get-contents2?folder=6&number=10#