Drainage asphalt mixture material composition design method

Abstract

The invention provides a composition design method for making porous asphalt mixture material, which includes steps: the porosity rate of the porous asphalt mixture material is defined according to the requirement of eliminating dynamic hydraulic and improving drainage performance; initial asphalt content is defined by the calculation method; frame embedding and extruding structure and porosity rate are regarded as the fundamental basis in extracting the final gradation of raw material; asphalt leakage loss and porosity rate are regarded as the main control index in defining the optimum asphalt content; fiber is used for increasing asphalt content on the basis of guaranteeing the porosity rate, and rotary specimen compacting and forming process is adopted to ensure the porous asphalt mixture material to own both the functionality and durability design requirements. The composition design method for making porous asphalt mixture material can satisfy the porosity rate design requirement and road-using property requirement of the porous asphalt mixture material, can ensure the functionality, road-using property of the porous asphalt road surface, and the stable compaction property and good drainage function in the later stage of using, and can improve the durability of the road surface, thus having the advantages of popularization and application.

Description

technical field [0001] The invention relates to asphalt pavement materials, in particular to a composition design method for drainage asphalt mixture materials. Background technique [0002] Drainage asphalt pavement is a kind of asphalt pavement with skeleton embedded porous structure. Due to the high internal void ratio, the pavement can timely drain the accumulated water on the walking surface, reduce driving noise, provide sufficient surface roughness, and improve the comfort and safety of road driving. The composition design methods of drainage pavement materials commonly used in the world are not the same. For example, some states in the United States use the surface constant KC method to determine the amount of asphalt for drainage pavements, but this method does not consider the specific surface area of ​​fine aggregates; in 1999, Kandhal and Mallick published "Design of a New Generation of Open Gradation Wearing Layer" ( See the document "Design of a New Generatio...

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Problems solved by technology

my country's "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004) draws on the method recommended by the Japan Road Association. This method takes the void ratio as the main basis for gradation selection, and does not consider the characteristics of the skeleton structure

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