Characterization And Mechanical Testing Of Waste Tire Dust Modified Bitumen

Lim, Qin Jing (2019) Characterization And Mechanical Testing Of Waste Tire Dust Modified Bitumen. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays, the bitumen-based damping sheet is applied on the body panel of the car body to reduce the vibration generated from the car engine. In the commercial market, most of the industry used synthetic rubber as reinforcement in the bitumen-based damping sheet. However, waste tire dust generated during tire buffing process could serve as an alternative to reduce the used of synthetic rubbers in damping sheets Thus, this research focuses on the waste tire dust as the raw material to modify the damping properties of the bitumen-based damping sheet due to its reusability and ecologically friendly characteristic. The objectives of this research were to investigate the effect of the waste tire dust filler content and mixing time of the raw materials on the damping properties of the waste tire dust modified bitumen. In this research, there were three different loading of waste tire dust being incorporated into bitumen-based damping sheet which were 10, 15, and 20 wt. %. Meanwhile, the mixing time during the sample fabrication process was varied at 15, 30, and 45 minutes. Besides that, 10 wt. % of mica and 10 wt. % of calcium carbonate were employed during sample fabrication to improve the strength of bitumen. After that, the waste tire dust modified bitumen samples were cut based on the ASTM E756 for Oberst beam Method test in order to study its damping properties. Through this testing, the damping performance of the waste tire dust modified bitumen was found to increase as the waste tire dust filler content and mixing time of the raw materials increased. At the end of this research, the damping properties of the waste tire dust filler content with 20 wt. % was found to be the highest and the optimum mixing time of the raw materials was 45 minutes. As the filler loading increased, loss of energy by the sample increased, thus more energy has dissipated. Besides that, the longer mixing time lead to the increased homogeneity of the sample and it will definitely enhance the mechanical properties of the mixture. Hence, the higher the waste tire dust filler content and longer mixing time of the raw materials have shown to result in the high damping performance of the waste tire dust modified bitumen.

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