Increasing performance of straight pattern of rubber tyre on asphalt track due to sulfur composition

Abstract

The motion of a ground vehicle is primarily determined by friction force transferred from road via tires. Therefore, the effect of the compound composition on the hardness and wear resistance is investigated. The grip coefficients on the track in wet and dry conditions are also investigated. In this research, the three combinations of black carbon and sulfur composition namely compound 1, compound 2 and compound 3 are provided. The hardness, wear resistance and grip coefficient are then tested. The results of the tests are also compared to the existing compound material which is already on the market. The shore A hardness of compound 1, compound 2 and compound 3 are 75, 75, and 77 respectively. The wear rate of compound 1, compound 2 and compound 3 in dry asphalt condition are 19.49 mm3/sec, 18.64 mm3/sec and 13.42 mm3/sec respectively. The wear rate of compound 1, compound 2 and compound 3 in wet asphalt condition are 6.457 mm3/sec, 5.933 mm3/sec and 4.133 mm3/sec respectively. The grip coefficient of compound 1, compound 2 and compound 3 in dry asphalt condition are 0.756, 0.751, and 0.725 respectively. The grip coefficient of compound 1, compound 2 and compound 3 in wet asphalt condition are 0.702, 0.693, and 0.685 respectively. The compound material already on the market has shore A hardness of 71, wear rate in dry asphalt condition of 11.40 mm3/sec, wear rate in wet asphalt condition of 2.800 mm3/sec, grip coefficient in dry asphalt condition of 0.773 and grip coefficient in wet asphalt condition of 0.727. The shore A hardness and wear rate of compound 1, compound 2 and compound 3 are higher than the shore A hardness and wear rate of the compound material already on the market. While the grip coefficient of compound 1, compound 2 and compound 3 are lower than the grip coefficient of the compound material already on the market.