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

A technology of asphalt mixture and asphalt modification, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving, and can solve the problems of high internal pressure of tires and large traffic volume.

Inactive Publication Date: 2011-12-14
TONGJI UNIV
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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

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

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Embodiment 1

[0035] Example 1: Since the production mix ratio design of Buton rock asphalt modified asphalt mixture is the same as that of ordinary hot mix asphalt mixture, only the two-stage design process of the target mix ratio of Buton rock asphalt modified asphalt mixture is listed here.

[0036] 1. Raw material performance testing

[0037] 1) The base asphalt in the mix ratio design adopts No. 70 A-grade road petroleum asphalt, which complies with the technical requirements for this asphalt in the "Technical Specifications for Construction of Highway Asphalt Pavement" (JTG F40-2004). The modifier is natural Buton rock asphalt (BRA).

[0038] 2) Carry out the BRA raw material performance inspection, and the asphalt content is 24%, and other indicators meet the requirements of the BRA quality standard in Table 1.

[0039] 3) The aggregate limestone used in AC-20C coarse-grained coarse-grained dense-graded asphalt mixture includes: 10-20mm crushed stone, 10-19mm crushed stone, 10-15mm ...

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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...

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Application Information

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IPC IPC(8): C04B26/26E01C7/22
Inventor 叶奋郅宏飞王胜王玉江黄启帝蒋国杰
Owner TONGJI UNIV
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