| Abstrakt: |
Used engine oil recycling produces acid sludge as a by-product of the acid-clay treatment. It is classified as hazardous waste material. This paper introduces a novel material named PS (powdery sludge) by functionalising the acid sludge. PS was used in a dry method to replace fine aggregates of the asphalt mixture. The effect of adding PS was investigated on the rheological behaviour of asphalt mastics by using dynamic shear rheometer for performing frequency sweep and multiple stress creep and recovery tests, bending beam rheometer, differential scanning calorimetry, and Fourier transforms infrared spectroscopy tests. Adding PS makes the mastic softer at low temperatures and stiffer at high temperatures, causing it up to 5 and 1.38 times more resistant to rutting and fatigue, respectively. Also, PS reduces temperature sensitivity, aging potential, and moisture sensitivity. Therefore, using PS as a replacement for siliceous aggregates in cold, moderate, and tropical regions is recommended. [ABSTRACT FROM AUTHOR] |
