A kind of indoor simulated asphalt mixture aging method

A technology of asphalt mixture and mixture, applied in the direction of analysis materials, instruments, measuring devices, etc., can solve the problems of asphalt mixture performance aging and pavement performance degradation

Active Publication Date: 2022-04-08
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aging of asphalt will lead to the aging of asphalt mixture performance, which in turn will lead to the decline of pavement performance

Method used

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  • A kind of indoor simulated asphalt mixture aging method
  • A kind of indoor simulated asphalt mixture aging method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0018] Step 1, sample preparation: According to the required mineral material gradation and asphalt dosage, the asphalt mixture is prepared according to the method specified in the road engineering asphalt and asphalt mixture test regulations.

[0019] Step 2, short-term aging: The asphalt mixture obtained in step 1 is subjected to short-term aging according to the method specified in the road engineering asphalt and asphalt mixture test regulations.

[0020] Step 3: For the short-term aging asphalt mixture obtained in step 2, make a standard Marshall test piece according to the method specified in the road engineering asphalt and asphalt mixture test regulations, and then cool and remove the film. The size of the standard Marshall test piece is 101.6mm×63.5mm, the mass is 1200g, and the oil-stone ratio is 4.6%.

[0021] Step 4, place the pattern obtained in step 3 on the pattern rack and send it into an oven at 82°C, and heat continuously for 59.5h under forced ventilation. ...

specific Embodiment 2

[0028] Step 1, sample preparation: According to the required mineral material gradation and asphalt dosage, the asphalt mixture is prepared according to the method specified in the road engineering asphalt and asphalt mixture test regulations.

[0029] Step 2, short-term aging: The asphalt mixture obtained in step 1 is subjected to short-term aging according to the method specified in the road engineering asphalt and asphalt mixture test regulations.

[0030] Step 3: For the short-term aging asphalt mixture obtained in step 2, make a standard Marshall test piece according to the method specified in the road engineering asphalt and asphalt mixture test regulations, and then cool and remove the film. The size of the standard Marshall test piece is 101.6mm×63.5mm, the mass is 1200g, and the oil-stone ratio is 4.6%.

[0031] Step 4, place the pattern obtained in step 3 on the pattern rack and send it into an oven at 82°C, and heat continuously for 60.5h under forced ventilation. ...

specific Embodiment 3

[0038] Step 1, sample preparation: According to the required mineral material gradation and asphalt dosage, the asphalt mixture was prepared according to the method specified in the road engineering asphalt and asphalt mixture test regulations. The mineral gradation and asphalt dosage are shown in Table 1.

[0039] Table 1: Index values ​​measured by each extracted bitumen in the examples

[0040]

[0041] Step 2, short-term aging: The asphalt mixture obtained in step 1 is subjected to short-term aging according to the method specified in the road engineering asphalt and asphalt mixture test regulations.

[0042] Step 3: For the short-term aging asphalt mixture obtained in step 2, make a standard Marshall test piece according to the method specified in the road engineering asphalt and asphalt mixture test regulations, and then cool and remove the film. The size of the standard Marshall test piece is 101.6mm×63.5mm, the mass is 1200g, and the oil-stone ratio is 4.6%.

[004...

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Abstract

The invention discloses an indoor simulated asphalt mixture aging method, which comprises the following steps: preparing asphalt mixture; performing short-term aging on the asphalt mixture; making a standard Marshall test piece, and then performing cooling and stripping; performing long-term aging; performing thermal oxidation Water aging; asphalt extraction experiment to obtain recycled asphalt; index test and component analysis of asphalt mixture and recycled asphalt; comparison of asphalt mixture and recycled asphalt data to obtain the aging degree of asphalt mixture. The invention provides an indoor simulated asphalt mixture aging method. According to the experimental method, the aging performance of the asphalt mixture can be evaluated, thereby providing theoretical guidance for practical engineering.

Description

technical field [0001] The invention relates to an indoor simulated asphalt mixture aging method, which belongs to the technical field of transportation engineering. Background technique [0002] Asphalt pavement has the advantages of good flatness, low noise, and easy maintenance, and has become the main pavement structure in Jiangsu Province and my country's highway construction. After more than ten years of rapid development of highways in our province, a large number of asphalt pavements will enter the period of major and medium repairs. According to the design life of asphalt pavements (15 to 20 years), about 1% of asphalt pavements need to be repaired every year from now on. . Every year, tens of millions of tons of asphalt pavement materials (hereinafter referred to as "old materials") are excavated and milled. How to recycle these resources is a major test for promoting the development of circular economy in highways. [0003] Asphalt pavement recycling technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 董夫强于新李宁司晶晶秦成林
Owner HOHAI UNIV
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