Pengembangan proses degradasi karet alam menggunakan lindi hitam sebagai bahan tambahan aspal termodifikasi

Abstract

One way to improve the usability of natural rubber is by modifying natural rubber, for example by giving a chemical degradation treatment. Degradation of chemical compounds taken with the aid of a polymer chain breakers, in this study used black liquor. Degradation of natural rubber aims to adjust the physical properties of natural rubber in the mechanism of mixing with asphalt to produce a modified asphalt that is expected to improve and enhance the properties of asphalt in its application in road pavement. Chemical degradation pursued through three stages. The first stage is the formation process of latex into solid rubber in the form of crepes. The second stage is the process of rubber degradation using black leachate by using two variations of the treatment, immersion time of rubber in black leachate and drying time. While the third stage is mixing of degraded rubber with asphalt. The variation of immersion time and drying time significantly affected the amount of black liquor absorbed by the rubber, plasticity (Po), and softening point of modified asphalt. The best treatment in this study were treated R7K2 (rubber immersed for 7 hours and dried in the normal time plus 2 hours).