Marshall and France rubber modified asphalt concrete research

The main components of discarded tires are natural rubber, synthetic rubber, carbon black, antioxidants and metal oxide, which is basically to improve the physical properties of asphalt is useful. As a result, the United States and other developed countries, such as early as the need for legislation to be applied to the asphalt mixture, in which an application is in the form of rubber modified asphalt concrete. Mixture of Asphalt that is dry to infiltrate into the broken particles of discarded tires, mixing, paving, rolling and forming of a new type of asphalt concrete.

Rubber is a kind of polymer materials, so it has such material commonality, such as the density of small, low-permeability of the fluid, the viscoelastic nature of aging and the environment, and so on. The room temperature is high elastic properties of rubber materials, it is also known as rubber elastomers. According to the Asphalt Binder when the temperature is relatively low viscosity, the rubber tied granular enough to restore the characteristics of elastic deformation.

Harbin Institute of Technology School of Traffic Engineering Tan Yiqiu proposed forming the second. That is, mixing in the end after a mixture compaction, the mixture temperature to be reduced to a value of the course is the second blow molding. In this study in order to off-GAP-13 equipped with a mixture designed as a gradation through different combinations of temperature rubber modified asphalt concrete specimen shape the law of the study and found its shape, made of rubber modified asphalt concrete samples Indoor forming methods.

Marshall and France is the experience of law, its stability, the value of the stream, such as evaluation and not the road to build long-term performance, as long as the appropriate forming process, the method is different from ordinary asphalt concrete specimen with porosity as a rubber modified asphalt Concrete sample evaluation of the physical properties are entirely possible; 130 ℃ forming a secondary molding 100 ℃ method suitable for molding rubber modified asphalt concrete specimens.