Research On The Performance Of Used Engine Oil Regeneration Asphalt And Its Mixture

The regeneration of materials from wasted asphalt pavement has become a studyhighlight for scholars both in China and abroad. Regeneration agent, whose major functionlies in recovering aged asphalt from wasted asphalt materials, is the top priority for suchresearch. In the hope of reducing cost, this research simulated asphalt aging in laboratory andverified its regeneration performance from an experimental angle by using certain amount ofwasted engine oil as the regeneration agent.After analyzing the adverse influences and the regeneration mechanism of wastedasphalt mixtures, this thesis discusses the feasibility of taking wasted engine oil asregeneration agent from the viewpoint of like dissolves like rule, and studies asphaltregeneration through wasted engine oil and the performance of asphalt mixture on the basisof simulating thermal asphalt aging in laboratory. First, researchers simulated asphalt agingby oven heating and then added different proportions of wasted engine oil in asphalt samplesthat differed in aging time. Results showed that aged asphalt samples were regenerated todifferent extents when wasted engine oil was added. By comparing the performance (needlepenetration, viscosity, ductility, and softening point) and composition changes of asphaltsamples with different aging time and engine oil addition, this thesis determined the optimalchoices for aging time and wasted oil addition after taking into consideration asphalt’s agingdegree and the cost. Then, a comparative analysis was presented regarding the performanceof regenerated and original asphalt mixtures. Results of splitting test (indirect tensile test)showed that the splitting strength of regenerated asphalt mixture was84%as much as that oforiginal asphalt material while its destruction strength and stiffness modulus were87%and105%as much as those of original asphalt mixture respectively, indicating that theperformance of regenerated asphalt was a little bit lower than that of its original counterpart.Results of freeze-thaw splitting test revealed that the TSR value of regenerated asphaltmixture was97%as much as that of the original one, indicating that water stability didn’tchange much in the regeneration process. Uniaxle creep test displayed that regeneratedasphalt was96%as much as original asphalt in residual deformation rate a sign of goodhigh-temperature stability. At the same time, viscoelasticity theory and ANSYS softwarewere used to calculate the data we got from creep test to verify the accuracy of the experiment results. Finally, by analyzing current literature, it is concluded the use of wastedengine oil as regenerating agent can generate tremendous economic and social benefits.