Assessing Intermediate Temperature Cracking Performance of Chitin-Treated Asphalt
Authors :- Das, A.K.; Panda, M.; Habal, A.
Publication :- Pavement Systems Engineering. TPMDC 2024. Lecture Notes in Civil Engineering, vol 653. Springer, 2025
The goal of the current study is to evaluate chitin's impact on asphalt binder's resistance to intermediate temperature cracking. To produce modified asphalt binder specimens for the investigation, a conventional grade asphalt binder (VG-30) and chitin (Ch) are used as modifiers. By the mass of VG-30, the Ch doses were chosen as 0, 0.5, 1, 1.5, 2, 2.5, and 3%. Temperature sweep and linear amplitude sweep (LAS) tests were used to assess the intermediate temperature cracking performance of conventional and modified bitumen. The results of the investigation on cracking performance parameters showed that the Ch contributes favourably to the bitumen binder's resistance to fatigue cracking. According to the Superpave fatigue factor, adding Ch can enhance the ductile property of modified bitumen, which results in increased resistance to fatigue cracking. Similarly, the fatigue cycle parameter showed that the Ch-modified bitumen can withstand strain better, hence postponing the bitumen binder's fatigue damage for a longer period.