In recent years, warm mix asphalt (WMA) is widely used for reducing energy requirements and emissions in comparison to hot mix asphalt (HMA) industry. Besides, the use of rubberized bitumen has been spread out mainly due to environmental aspects, but high mixing and compaction temperatures are necessary due to the higher viscosity of this bitumen. A WMA mixture (using a surfactant technology) with asphalt rubber was evaluated in a field project, together with a control section. WMA mixing and placing temperature was 25ºC lower than HMA, from about 170 to 145ºC. Tensile indirect strength, resilient modulus and moisture resistance tests were conducted with loose mixture collected in the plant to evaluate field performance. Based on these tests in laboratory, the WMA technologies all performed equal to the control mixture. In addition, a simplified estimate of decreasing in fuel consumption was also determined and the results showed that the use of WMA was advantageous.
