Review of Effect of Fillers on Aging Behaviour of Paving Grade Bitumen

transportation engineering

Age hardening is one of the important variable of many variable that affect the viscoelastic properties of bitumen with time. Age hardening of bitumen is an irreversible process, which significantly affect the durability of pavements and eventually increases the maintenance cost. When the bitumen is age hardened, the asphalt mixture will become brittle and its ability to support traffic-induced stresses and strains may significantly decrease. The main mechanisms of aging of bitumen are oxidation and loss of volatiles during asphalt mixture production (short-term ageing) and in-place service period (long-term ageing). Both are cause an increase in viscosity (or stiffness) of the bitumen. The aging of bitumen is one of the principal factors causing the deterioration of asphalt pavements. . The aging modes of failures includes fatigue, thermal induce cracks, and raveling. In the present research work, study on different research papers is carried out to examine the effect of aging on bitumen binder using different filler materials. The aim of this research work is investigate effect of filler materials on bitumen aging. Studies have shown that the neat bitumen binder has more effect of aging then modified bitumen.

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