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A high-efficiency recovery agent for aged asphalt and its preparation method

An aging asphalt and recovery agent technology, applied in building components, building thermal insulation materials, construction, etc., can solve problems such as potholes, poor aggregate bonding performance, road cracks, etc., achieving significant economic benefits, saving project investment, The effect of prolonging the service life

Active Publication Date: 2016-03-02
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the use of asphalt pavement, asphalt materials will undergo many complex physical and chemical changes under the action of various natural factors such as oxygen, temperature, light, water, etc. The long-term effects of various natural factors make asphalt materials tend to age. The prominent performance is that the viscosity of the asphalt increases, the asphalt surface layer is brittle and hard, its plasticity and deformation ability are reduced, and the bonding performance with the aggregate is deteriorated, which leads to cracks, looseness, potholes and other damages on the road surface, and the road performance also get worse

Method used

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  • A high-efficiency recovery agent for aged asphalt and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, preparation of aging asphalt performance efficient recovery agent

[0025] The third-line distillate oil (distillation range 410°C~460°C) is used as raw material, furfural is used as the extraction agent, and the extraction is carried out in the extraction tower. The temperatures at the top and bottom of the extraction tower are controlled at 110°C and 90°C respectively. The mass ratio of the third-line distillate oil is 2.2:1; furfural is recovered, and the obtained extracted oil and the fourth-line distillate oil (distillation range is 465°C~505°C) are mixed in a mass ratio of 4:6 at 80 °C, the obtained mixture is the aging asphalt performance recovery agent.

[0026] The viscosity of the recovery agent at 60°C is 331mPa·S, and the total content of saturated and aromatic components (test method is SH / T0509 standard method) is 87%.

Embodiment 2

[0027] Embodiment 2, preparation of aging asphalt performance efficient recovery agent

[0028] Use the third-line distillate oil (distillation range 410°C~460°C) as raw material, use furfural as the extractant, and extract in the extraction tower, control the temperature at the top and bottom of the extraction tower to be 85°C and 55°C respectively, The mass ratio with the third-line distillate oil is 2:1; after recovering furfural, the obtained extracted oil and the third-line distillate oil are mixed in a mass ratio of 3:1 at 70°C, and the obtained mixture is Aged asphalt performance restorer.

[0029] The viscosity of the recovery agent at 60°C is 393mPa·S, and the total content of saturated and aromatic components (test method is SH / T0509 standard method) is 85%.

Embodiment 3

[0030] Example 3, preparation of aging asphalt performance efficient recovery agent

[0031] Use the third-line distillate oil (distillation range 410°C~460°C) as raw material, use furfural as the extractant, and extract in the extraction tower, control the temperature at the top and bottom of the extraction tower to 100°C and 80°C respectively, The mass ratio with the third-line distillate oil is 2:1; after recovering furfural, the obtained extracted oil and the third-line distillate oil are mixed at 60°C in a mass ratio of 1:1, and the obtained mixture is aged asphalt Performance restorer.

[0032] The viscosity of the recovery agent at 60°C is 281mPa·S, and the total content of saturated and aromatic components (test method is SH / T0509 standard method) is 89%.

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Abstract

The invention discloses a high-efficient performance restoring agent for aged asphalt and a preparation method thereof. The preparation method comprises the following steps: (1) extracting vacuum distillate oil with an organic solvent so as to obtain extracted oil; (2) mixing the extracted oil with the vacuum distillate oil so as to obtain the performance restoring agent for aged asphalt. The viscosity of the performance restoring agent is 50 MPa.S to 600 MPa.S at 60 DEG C, and the total content of saturates and aromatics of the performance restoring agent is 80% to 95%. The performance restoring agent is sprayed on the pavement, or is added during the pavement regeneration process so as to restore the pavement performance to a certain degree. The performance restoring agent is applied to the pavement regeneration, can save a large amount of asphalt and sands, thus reduces the project investment, has the advantages of recycling waste materials, saving energy, and protecting the environment, and has a prominent social and economic profit.

Description

technical field [0001] The invention relates to a high-efficiency recovery agent for aging asphalt performance and a preparation method thereof, belonging to the field of petrochemical industry. Background technique [0002] At present, the total mileage of my country's highways has reached 4 million kilometers, and the mileage of expressways is close to 100,000 kilometers. A considerable part of the asphalt pavement has approached or reached its design life. During the repair or reconstruction of old roads, a large number of old roads will be produced. If the pavement material waste is not properly disposed of, it will cause environmental pollution, and these waste materials still have certain utilization value, and they will cause huge waste of resources if they are treated as garbage. Regenerating the asphalt pavement and restoring the functionality of the aged asphalt on the asphalt pavement can maintain the quality of the pavement and prolong the service life of the road...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K5/01C04B24/00
Inventor 王涛齐邦峰裴晓光李福起王志超
Owner CHINA NAT OFFSHORE OIL CORP