Paper Title
Design of Experiment for Upscaling Material Value of Used Tire as Material Mixture in Tire Production

Negative effects arising from the presence of waste tires on the environment are a major problem worldwide, this requires an emphasis on recycling and reuse processes. The purpose of this research is to find the method of processing that gives the highest value for used car tire material and make one of the raw material of mass production. Recycling as a substitute raw material for new tire production becomes one of the potential options for obtaining utilization with the best possible conservation of material value according to the principles of Production for Material Value Conservation. In this research, crumb rubber from used car tire material has been tested as raw material of mixer in producing tire. Rubber compound is made with variation of rubber material mix from used car tire and new rubber material. The test results show the most optimum percentage of used tire material for rubber tire material mixture is 15% for car tire, after applied to the tire retreading process and then the proof was performed with visual inspection, Dimension inspection, Tread Wear Indicator, and endurance test to meet the standard requirements. Keywords - crumb rubber, waste tire, tire recycling, material value conservation