Optimum design method for mineral aggregate gradation of hot recycled asphalt mixture

An asphalt mixture, optimization design technology, applied in the direction of calculation, special data processing applications, instruments, etc., can solve problems such as easy occurrence of early diseases, inconsistent design gradation, uniform mixing, etc.

Active Publication Date: 2016-12-07
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the mixing process, the fine-grained old ore covered by the old asphalt in the recycled asphalt pavement (RAP) cannot be completely separated from the coarse-grained old ore, and it cannot be evenly mixed with the new ore, making the hot recycled asphalt mixture T

Method used

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  • Optimum design method for mineral aggregate gradation of hot recycled asphalt mixture
  • Optimum design method for mineral aggregate gradation of hot recycled asphalt mixture
  • Optimum design method for mineral aggregate gradation of hot recycled asphalt mixture

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Embodiment 1

[0040] According to the technical solution of the present invention, this embodiment provides an optimal design method for determining the gradation of thermally recycled asphalt mixture, taking AC-20C type thermally recycled asphalt mixture as an example, and the dosage of RAP is 20%.

[0041] (1) According to road grades, climatic conditions, and traffic characteristics, fully refer to successful experience to determine the scope of engineering design grading. The engineering design grading range should comply with the corresponding hot mix asphalt mixture grading range stipulated in the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40) promulgated by the Ministry of Transport.

[0042] The gradation range of hot recycled asphalt mixture is shown in Table 2.

[0043] Table 2 Grading range of hot recycled asphalt mixture

[0044]

[0045] (2) Determine the gradation of old mineral materials in new mineral materials and recycled asphalt pavemen...

Embodiment 2

[0078] According to the technical solution of the present invention, this embodiment provides an optimal design method for determining the gradation of heat-recycled asphalt mixture, taking AC-20C type heat-regenerated asphalt mixture as an example, and the dosage of RAP is 30%.

[0079] (1) According to road grades, climatic conditions, and traffic characteristics, fully refer to successful experience to determine the scope of engineering design grading. The engineering design grading range should comply with the corresponding hot mix asphalt mixture grading range stipulated in the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40) promulgated by the Ministry of Transport.

[0080] The gradation range of hot recycled asphalt mixture is shown in Table 6.

[0081] Table 6 Grading range of hot recycled asphalt mixture

[0082]

[0083] (2) Determine the gradation of old mineral materials in new mineral materials and recycled asphalt pavement mater...

Embodiment 3

[0117] According to the technical solution of the present invention, this embodiment provides an optimal design method for determining the gradation of thermally recycled asphalt mixture, taking AC-25C type thermally recycled asphalt mixture as an example, and the dosage of RAP is 30%.

[0118] (1) According to road grades, climatic conditions, and traffic characteristics, fully refer to successful experience to determine the scope of engineering design grading. The engineering design grading range should comply with the corresponding hot mix asphalt mixture grading range stipulated in the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40) promulgated by the Ministry of Transport.

[0119] The gradation range of hot recycled asphalt mixture is shown in Table 10.

[0120] Table 10 Grading range of hot recycled asphalt mixture

[0121]

[0122] (2) Determine the gradation of old mineral materials in new mineral materials and recycled asphalt pavemen...

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Abstract

The invention discloses an optimum design method for mineral aggregate gradation of a hot recycled asphalt mixture. The method comprises the steps of (1), determining engineering design gradation ranges; (2), testing the gradation of old mineral aggregates in new mineral aggregates and recycled asphalt pavement (RAP) materials; (3), testing the proportion of the old mineral aggregates with different specifications of fine particles, and the old mineral aggregates without coarse particles contained in the recycled asphalt pavement (RAP) materials, and carrying out discount calculation on the gradation of the old mineral aggregates according to test results; and (4), carrying out gradation optimum design on the hot recycled asphalt mixture according to the test and measurement results in the (1)-(3) and the engineering design gradation range. The gradation design method is high in practicability, the designed gradation of the recycled asphalt mixture is remarkably enabled to be more consistent with the engineering practice, the pavement performance of the hot recycled mixture is improved, and the service life of the hot recycled asphalt pavement is prolonged.

Description

technical field [0001] The invention belongs to the technical field of heat-regenerated asphalt pavement for urban roads, airport roads, highways, etc., and in particular relates to an optimal design method for mineral material gradation of heat-regenerated asphalt mixture. Background technique [0002] Most of my country's high-grade highways adopt asphalt pavement structure, and the design life is generally 12 to 15 years. Usually, it needs to be overhauled once after about 10 years. About 8,000-9,000 kilometers of highways need to be overhauled every year, producing nearly 50 million tons of waste asphalt mixture. On the one hand, the stacking of waste asphalt mixture not only occupies a large amount of land resources, but also causes serious environmental pollution; As a scarce resource, there is also the problem of over-exploitation. Asphalt pavement regeneration technology achieves the purpose of saving resources and protecting the ecological environment by reusing w...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/00
Inventor 郭德栋许萌张圣涛
Owner SHANDONG JIAOTONG UNIV
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