عنوان مقاله [English]
Considering the environmental issue in form of reducing both of air pollutant emissions and disposing of waste materials in the environment, nature lovers have come up Asphalts with less heat in production (warm asphalt) and use again of recycled materials in the road construction sector. According to this approach, waste tire rubber in warm mix asphalt is used and since fatigue failure is affecting the quality and safety of asphalt pavement, effect of this additive on fatigue life has been investigated. In this regard, Zycotherm was used as warm mix additive in amounts of 0.1, 0.15 and 0.2 percent by bitumen weight and waste tire was used as substitute for 10 and 20 percent aggregate. Resilient Modulus, Indirect Tensile Strength, Four-point Bending Beam and Indirect Tensile Fatigue tests were done on asphalt specimens. The results showed that both additives increase fatigue life and the optimum use of waste tire rubber in warm mix asphalt is 10 percent replacement with aggregate, which can improve fatigue life by up to 80 percent along with 0.1 percent of the zycotherm.