Design method of ATB-30 asphalt mixture

Abstract

The invention discloses a design method of an ATB-30 asphalt mixture, which adopts a vertical vibration design method. The method comprises the steps of raw material selection and testing, mineral gradation design, determination of optimal asphalt-aggregate ratio, property inspection and the like. The experimental verification indicates that the asphalt mixture designed by the method has the advantages of favorable road applicability and low asphalt consumption, is simple to operate, and can save the asphalt by 8-10%.

Description

technical field [0001] The invention belongs to the technical field of traffic civil engineering application, and specifically relates to a design method of ATB-30 asphalt mixture, which adopts the vertical vibration method (VVTM) design, can reduce the amount of asphalt, improve the road performance of the asphalt mixture, and The operation is simple and suitable for large-scale popularization and application. Background technique [0002] At present, the design methods of ATB-30 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] The ATB-30 asphalt mixture in my country generally adopts the Marshall design method in "Technical Specifications for Construction of Highway Asphalt Pa...

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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 connection 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 for the needs of modern transportation development

The various technical standards of the current Marshall method for designing asphalt mixtures were proposed based on the traffic volume in the early 1980s, but the current traffic conditions of arterial highways have undergone significant changes, showing the characteristics of "large flow and heavy axle load" Obviously, the various technical standards proposed by the Marshall Act can no longer meet the current traffic requirements for road performance.

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