Design method of AC-25 asphalt mixture

Abstract

The invention discloses a design method of an AC-25 asphalt mixture. The design method adopts a vertical vibration method and comprises the steps of raw material selection and testing, design of mineral aggregate gradation, determination of the optimal asphalt-aggregate ratio, detection of performances and the like. Experimental verification indicates that the asphalt mixture designed by the method has good pavement performance, is little in amount of asphalt and is simple and convenient to operate, and the asphalt can be saved by 8-10%.

Description

technical field [0001] The invention belongs to the application technical field of traffic civil engineering, and in particular relates to a design method of AC-25 asphalt mixture. The method adopts the vertical vibration method (VVTM) design, which can reduce the amount of asphalt, improve the road performance of the asphalt mixture, and is easy to operate, suitable for large-scale popularization and application. Background technique [0002] At present, the design methods of AC-25 asphalt mixture mainly include Marshall method, GTM method and Hveem method. The expensive equipment used by the GTM method is not conducive to popularization; the design results of the Hveem method have poor correlation with the field. At present, the Marshall method is still the main method for asphalt mixture design in most countries. [0003] my country's AC-25 asphalt mixture generally adopts the Marshall design method in "Technical Specifications for Construction of Highway Asphalt Paveme...

AI Technical Summary

Problems solved by technology

[0013] (1) The forming method of the Marshall design method cannot accurately simulate the compaction effect of the wheels on the road surface

There is no internal relationship between compaction work and traffic volume, and the density of the formed test piece cannot reflect the density of the road after it has been opened to traffic for many years, and the physical and mechanical properties of the test piece do not match the actual road surface;

[0014] (2) The Marshall design method is no longer suitable

Images