Drainage asphalt mixture material composition design method

A technology of drainage asphalt and asphalt mixture, which is applied in the field of asphalt pavement materials, can solve the problems of not considering the characteristics of the skeleton structure, etc., and achieve the effects of improving drainage, ensuring high temperature stability, and improving durability

Inactive Publication Date: 2008-08-20
WUHAN UNIV OF TECH
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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 Asso

Method used

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  • Drainage asphalt mixture material composition design method
  • Drainage asphalt mixture material composition design method
  • Drainage asphalt mixture material composition design method

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Embodiment Construction

[0016] The method for designing the composition of the drainage asphalt mixture material provided by the present invention specifically includes: determining the porosity of the drainage asphalt mixture material according to the requirements of eliminating dynamic water pressure and improving drainage performance; determining the amount of initial asphalt by calculation; The basic basis for selecting the final gradation of raw materials is the skeleton embedded structure and void ratio; the asphalt leakage loss and void ratio are used as the main control indicators to determine the optimal asphalt dosage; on the basis of ensuring the void ratio, fiber reinforced A large amount of asphalt is used, and the rotary compaction forming test piece process is adopted to ensure that the drainage asphalt mixture material meets the design requirements of functionality and durability.

[0017] The above-mentioned drainage asphalt mixture material composition design method provided by the p...

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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...

Claims

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Application Information

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IPC IPC(8): C04B26/26E01C7/18
Inventor 吴少鹏刘刚磨炼同曹庭维陈明宇王金刚张园周磊
Owner WUHAN UNIV OF TECH
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