Determining method suitable for mix proportion of asphalt mixture of heavy traffic road surfaces

Abstract

The invention discloses a determining method suitable for the mix proportion of asphalt mixture of heavy traffic road surfaces. The determining method comprises the following steps of preparing raw materials, using a coarse aggregate dry tamping VCA testing method to determine the mass relative proportion of coarse aggregate in the asphalt mixture, using a Marshall tamping testing method to determine the content of coarse aggregate and the content of fine aggregate in the asphalt mixture, and using the tightest framework embedding and extruding state to determine the optimal asphalt-aggregate ratio of the asphalt mixture. Compared with general asphalt mixture, the compactness of the asphalt mixture manufactured in the determining method is improved obviously, the water seepage situation of the road surfaces can be effectively reduced, and water breakage of the road surfaces is reduced. Furthermore, the asphalt mixture has better high temperature resistance, and harm of tracks, bleeding and the like are reduced. Meanwhile, the using amount of asphalt is reduced, engineering investment cost is obviously reduced, and positive effects are brought to wider application of asphalt road surfaces inland.

Description

technical field [0001] The invention belongs to the field of road engineering design, and relates to a method for determining the mixing ratio of asphalt mixture. The determination method obtains asphalt mixture suitable for heavy-duty traffic road surfaces. Background technique [0002] 1) Current status of heavy traffic environment [0003] With the rapid growth of the national economy, my country's high-grade highway construction has achieved unprecedented development. From 1985 to 2012, my country's built expressways reached 90,000 km, most of which were completed in the 20th century, and the other The design life is only 15 years, and the actual service life is only 6-7 years. [0004] There are many factors affecting the early failure of current high-grade highways, one of which cannot be ignored is that the heavy traffic environment on some road sections aggravates the damage of asphalt pavement. Heavy-duty traffic usually refers to the phenomenon that the cumulative...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method for determining the proportion of asphalt mixture used in heavy-duty traffic environments, aiming at the current application of heavy-duty traffic There are deficiencies and irrationality in the determination method of the asphalt mixture ratio, and the asphalt mixture is designed in sequence from gradation selection to the determination of the best asphalt ratio. The invention includes:

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