Laboratory evaluation of the effect of synthetic Polyolefin-glass fibers on performance properties of hot mix asphalt

摘要

The synthetic compound fibers have been introduced as a modifier to improve rutting, fatigue and low-temperature behavior of asphalt mixtures. In this research, the combination of Polyolefin powders and glass fibers was used by different percentages as an additive in hot mix asphalt, and the performance properties of modified and unmodified asphalt mixtures were evaluated using resilient modulus, modified Lottman, water boiling, dynamic creep, indirect tensile fatigue and SCB fracture tests. The results indicated that using up to 0.12% of the synthetic fiber by weight of total mixture enhanced the performance of the mixture in all studied aspects as the Polyolefin component helped the elastic behavior and rutting resistance, and the high strength glass fibers improved the tensile strength, fatigue and crack resistance. However, increasing the amount of polyolefin-glass fiber to 0.18% had some adverse effect on resilient modulus, fatigue, fracture, and tensile resistance of the mixtures. (C) 2019 Elsevier Ltd. All rights reserved.