Gradation method of small-grain-size skeleton dense type asphalt mixture

Abstract

A gradation method of a small-grain-size skeleton dense type asphalt mixture comprises the following steps: 1, determining boundary sieve holes of a main skeleton and filling aggregates; 2, according to a gradation filling theory, obtaining the composition mass ratio of each grade of filling aggregates; 3, determining the optimum mass ratio of each grade of filling aggregates; 4, adopting a grey correlation entropy analysis method to determine key sieve holes which influence the skeleton properties of the asphalt mixture according to the influence of each grade of filling aggregates on the clearance rate and the maximum bearing capability of the main skeleton; 5, obtaining the gradation optimal range of the main skeleton of the asphalt mixture; 6, determining the mass ratio of each grade of filling aggregates; 7, determining key sieve holes that the filling aggregates influence the performance of the small-grain-size asphalt mixture; 8, obtaining the gradation reference range of filler in the asphalt mixture; and 9, determining the ratio of the main skeleton to the filling aggregates through a volumetric method so as to obtain the gradation range of the small-grain-size skeleton dense type asphalt mixture. The gradation method enables the skeleton and the dense state of the mixture to simultaneously reach the optimum and meets the requirements of roads and anti-slip performance.

Description

Technical field [0001] The invention belongs to the field of road construction, and in particular relates to a method for grading a small particle size skeleton dense type asphalt mixture. Background technique [0002] Small particle size skeleton dense asphalt mixture is mainly used for preventive maintenance of high-grade asphalt or cement pavement and corrective maintenance of minor diseases, because it has the function of improving the surface of the pavement, extending the service life of the pavement, improving the driving quality, and correcting the surface Pavement functions such as defects, reducing the thickness of the surface layer, improving safety characteristics (including anti-skid and drainage), and reducing noise have gradually received attention in recent years. The aggregate particle size of the small particle size skeleton dense type asphalt mixture is small and the overall bearing capacity is limited. Therefore, the composition of the mineral aggregate gradat...

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Problems solved by technology

[0003] Due to the limitation of the characteristics of small particle size, it is obviously unreasonable to divide the main aggregate and filling material by the division boundary of ordinary asphalt mixture coarse and fine aggregates in the traditional grading design method, and it is difficult to satisfy its road performance and Anti-slip performance requirements

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