Method for determining optimal asphalt aggregate ratio of asphalt mixture based on pavement performance

Abstract

The invention relates to a method for determining an optimal asphalt aggregate ratio of an asphalt mixture based on pavement performance. By the method, the optimal asphalt aggregate ratio of the mixture is determined based on the pavement performance of the mixture; determination of the optimal asphalt aggregate ratio of the asphalt mixture is well combined with the pavement performance of the asphalt mixture; the mutual dependence between the high temperature stability and the low temperature cracking resistance as well as the mutual dependence between the high temperature stability and the water stability in the pavement performance of the asphalt mixture are fully considered; and by the method for determining the optimal asphalt aggregate ratio of the asphalt mixture based on the pavement performance, balance design of the pavement performance of the asphalt mixture is realized. The method for determining the optimal asphalt aggregate ratio of the asphalt mixture based on the pavement performance can be applied to design of common asphalt mixtures and modified asphalt mixtures.

Description

technical field [0001] The invention belongs to the field of road material design and processing, and relates to a method for determining the optimum asphalt ratio of asphalt mixture. Background technique [0002] At present, the design method of asphalt mixture commonly used in my country is the Marshall design method, that is, the target gradation is formulated by selecting a mineral material gradation type, and five groups of asphalt ratios are selected to form Marshall specimens, and each group of Marshall specimens Carry out volume parameter, Marshall stability, flow value test, and get density, porosity, ore material void ratio, asphalt saturation and other related technical indicators from volume parameter conversion Draw the relationship curve to finally determine the best oil-stone ratio. [0003] Using the Marshall design method to determine the asphalt mixture gradation and the optimal asphalt ratio to prepare asphalt mixture specimens, and conduct road performance...

AI Technical Summary

Problems solved by technology

[0004] From the Marshall design method and the road performance test and evaluation of asphalt mixture, it can be seen that the Marshall design method has the following shortcomings: (1) The Marshall compaction method in the Marshall design method cannot simulate the actual rolling of the road surface, and the stability and flow value are the same as that of asphalt The pavement performance correlation of the mixture is poor, and the asphalt mixture with qualified Marshall stability and flow value will also have unqualified road performance of the asphalt mixture; There are various contradictions between performance, mainly including the contradiction between high-temperature anti-rutting performance and low-temperature cracking resistance, and the contradiction between high-temperature anti-rutting performance and water stability performance. The contradictions between these road performances fully illustrate the Marshall The design method can not achieve the balance of asphalt mixture pavement performance

[0005] It can be seen from the above that although the Marshall design method is simple to operate in the design of asphalt mixture, it cannot control the road performance of asphalt mixture, which is not conducive to the use of asphalt mixture on the road surface.

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