Indoor simulation asphalt mixture aging method

Abstract

The invention discloses an indoor simulation asphalt mixture aging method. The method comprises the following steps: preparing an asphalt mixture; performing short-term aging on the asphalt mixture; manufacturing a standard Marshall test piece, and then performing cooling and demolding; carrying out long-term aging; carrying out hot oxygen water aging; performing an asphalt extraction experiment to obtain recycled asphalt; performing index test and component analysis on the asphalt mixture and the recycled asphalt; and comparing the asphalt mixture with the recycled asphalt data to obtain theaging degree of the asphalt mixture. According to the indoor simulation asphalt mixture aging method provided by the invention, the aging performance of the asphalt mixture can be evaluated accordingto the experimental method, so that theoretical guidance can be provided for actual 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 ...

Examples

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...

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 ...

Examples

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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