Crumb rubber and styrene tar were used to modify asphalt of Liaohe Oilfield asphalt by high shearing technology, the rolling thin film oven test was preformed and check the changes of softening point、needle penetration, delay degree according to different aging time and rubber powder content in rubber asphalt. Then homemade renewable agent additive was added in aged rubber modified asphalt to test its performance.The experimental results show that the mass fraction of rubber content 15% anti-aging properties is preferred and reach the state road asphalt No.140 standards.

Based on the Pairs-Erdogan crack growth model and with the application of the moment and a crack limit equation of state, the reliability of the steam floating machine under the circumstance of random variable basic parameters was discussed, and a steam-floating impeller crack growth reliability model was established. The reliability of impeller crack propagation life was deduced, which is basically the same with the results of Monte-Carlo simulation. The result shows that the method can give a more accurate forecast results and is suitable for application.