Two-stage Design Method of Buton Rock Asphalt Modified Asphalt Mixture

Abstract

The invention relates to a two stage design method of buton rock asphalt modified asphalt mixtures, comprising two concrete stages of: in a first stage, BRA is not added, an optimal bitumen aggregate ratio of matrix asphalt mixtures is obtained under a condition of a mixing temperature being 155-165 DEG C; in a second stage, BRA is added on the basis of the optimal bitumen aggregate ratio of matrix asphalt mixtures obtained in the first stage, an optimal bitumen aggregate ratio of BRA modified asphalt mixtures is obtained under a condition of a mixing temperature being 165-175 DEG C. In comparison with common non-modified hot mix asphalt mixtures, the road performance of the hot mix asphalt mixtures is improved. In comparison with SBS modified asphalt mixtures, the road performance of thehot mix asphalt mixtures is basically equal, but the cost can be reduced by over 20%. The design method provided by the invention can make the design of buton rock asphalt modified asphalt mixtures to be more convenient and accurate. Buton rock asphalt modified asphalt mixtures under the design method have better road performance than that of the common matrix asphalt and the partly modified asphalt mixtures. The design method is a high cost performance design method of asphalt mixtures, and can be applied to paving in surfacing projects of urban streets and roads of all grades.

Description

technical field [0001] The invention belongs to the field of highways and urban roads, and in particular relates to a two-stage design method for Buton rock asphalt modified asphalt paint. Background technique [0002] In recent years, the application of natural asphalt as a modifier in road construction has gradually entered the research vision of experts. As a kind of asphalt, natural asphalt has unique properties: good compatibility with asphalt, stable properties and low price. The research results of natural rock asphalt modification show that it has the characteristics of anti-stripping, durability, high temperature anti-rutting, and anti-aging, which determines that rock asphalt will have broad research and development space and market potential. [0003] Buton Rock Asphalt (hereinafter referred to as BRA), a kind of natural rock asphalt, is produced in Buton Island, southeast of Sulawesi, Indonesia, in the South Pacific Ocean. It is formed due to the continuous emer...

AI Technical Summary

Problems solved by technology

However, the performance of my country's existing domestic asphalt cannot meet the actual needs of modern traffic axle loads, large traffic volumes, and high tire internal pressure. Therefore, the development of asphalt materials with higher performance is the key to solving my country's road problems, and asphalt modification technology The development of asphalt makes it possible to improve the performance of asphalt

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