نوع مقاله : مقاله پژوهشی
موضوعات
عنوان مقاله English
نویسندگان English
The microstructure of asphalt mixtures plays an important role in their performance. The idea of using different additives to bitumen in order to improve its performance in asphalt mixtures has attracted the attention of road engineering researchers. Nanomaterials technology is one of the latest methods of improving the performance of asphalt mixtures against asphalt pavement failures due to its many capabilities in improving the behavior of asphalt mixtures. In this research, nano iron oxide was used as a mixture in bitumen to investigate the functional properties of coarse-grained mastic asphalt mixture (SMA). And its results have been compared with the mixture without nano iron oxide as a control mixture. During this study, the hardness modulus test was performed by indirect tensile method and wheel track test on the samples made with nano iron oxide additive and the control sample. From the analysis of the obtained results, it was found that the use of nano iron oxide mixed in bitumen has a positive effect on the stiffness modulus and resistance to rutting. So that with an increase of up to 1.2 percent iron nanooxide, the hardness modulus of the mixed bitumen at temperatures of 5, 15, 25 degrees increases by 41 to 72 percent compared to the control sample and then decreases. This rate of increase in the probability of failure of the groove will be reduced to a great extent. It was also determined from the wheel track test results An increase of up to 1.2 percent of nano iron oxide compared to mixed bitumen at temperatures of 60, 50, and 40 degrees will improve the groove depth by 36 to 50 percent compared to the control sample.
کلیدواژهها English
