Study On The Key Index Used For Controlling The Design Of The Pitch Mixtures

Nowadays several kinds of pitch mixture designing methods prevail in the world. With their respective advantages and distinct characteristics, they are all adopted by our province. However, at present various kinds of disease on road surface of super highway take place frequently. This phenomenon tells us lots of work needs to do.The thesis aims at expounding two problems: one is the mixture designing problem reflected in the representative diseases on the expressway of our province, the other is the main problem in designing. This article explains explicitly the American Engineering Gyratory Testing Machine operating principle and it's characteristics. Supported by this technology, through many experiments, data comparison and analysis, we can get more precise mixture key index choosing and span of control.