High-grade road hard asphalt and preparation method thereof

A hard asphalt, high-grade technology, applied in the direction of building components, climate change adaptation, building insulation materials, etc., can solve the problems of preparing road asphalt, anti-aging performance of unlisted asphalt, inconvenience of asphalt construction, etc., and achieve great economic benefits and social benefits, improving poor anti-aging performance, and improving utilization efficiency

Inactive Publication Date: 2015-05-27
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Chinese invention patent CN101492570A discloses a hard road asphalt composition and a preparation method thereof. The hard asphalt is prepared from hard asphalt with a high asphaltene content below 35 1 / 10 mm in penetration, base asphalt, a softener and a chemical modifier. High-quality road asphalt, but this technology needs to use the commonly used base asphalt as raw material, and the mixing ratio is relatively high (about 25% to 45%), and it is not possible to simply use hard asphalt and softener as basic raw materials to prepare qualified Road asphalt: with alkali, organic salt or inorganic salt as chemical modifier, the prepared road asphalt only lists the ductility at 25°C, and the ductility at 25°C is 8-26cm, which is difficult to meet the JTG F40 standard. The anti-aging performance of asphalt is not listed, and the viscosity at 135°C is greater than 3Pa·s, which brings inconvenience to the construction of asphalt

Method used

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  • High-grade road hard asphalt and preparation method thereof
  • High-grade road hard asphalt and preparation method thereof
  • High-grade road hard asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of high grade road hard asphalt

[0035] Raw materials: (weight percent)

[0036] Butane deoiled asphalt 53%, cutting temperature is 34.8% of topping oil slurry at 365°C, furfural extracts oil 10%, polymer modifier is SBS (its molecular structure is star structure, S / B composition is 30 / 70, the molecular weight is 220000), the dosage is 2%, and the auxiliary agent is polymer sulfur S40, and the dosage is 0.2%.

[0037] Prepared by:

[0038] Blend the deoiled asphalt and the topping oil slurry according to the above ratio and heat to 160°C, prepare the asphalt blend under the stirring state with a rotating speed of 200rpm, then add the extracted oil, and prepare the blended asphalt under the stirring state with a rotating speed of 250rpm ; Slowly add polymer modifier SBS to the blended asphalt at a heating temperature of 170°C and a shearing speed of 3000rpm, and shear for 20 minutes; continue to slowly add additives at a high-speed shearing state with a rotati...

Embodiment 2

[0040] 48% butane deoiled asphalt, 36.8% topping oil slurry with a cutting temperature of 382°C, 12% naphthenic oil, polymer modifier is SBS (its molecular configuration is star structure, S / B composition 30 / 70, the molecular weight is 220000), the dosage is 3%, and the auxiliary agent is polymer sulfur S40, and the dosage is 0.2%.

[0041] Prepared by:

[0042] Blend deoiled asphalt and topping oil slurry according to weight percentage and heat to 170°C, prepare an asphalt blend under stirring at a rotating speed of 100rpm, then add extracted oil, and prepare blended asphalt under stirring at a rotating speed of 250rpm; Slowly add the polymer modifier SBS to the blended asphalt at a heating temperature of 175°C and a shearing speed of 3500rpm, and shear for 20 minutes; continue to slowly add additives under a high-speed shearing state with a rotational speed of 4500rpm, and shear for 25 minutes; After the shearing is completed, stir and develop for 2 hours under the stirring...

Embodiment 3

[0044] Pentane deoiled asphalt 65%, cutting temperature is 15.4% of topping oil slurry at 410°C, intermediate base oil 15%, polymer modifier is SBS (its molecular configuration is a linear structure, and the S / B composition is 30 / 70, the molecular weight is 110000), the dosage is 4.5%, the auxiliary agent is selected elemental sulfur, and the dosage is 0.1%.

[0045] Prepared by:

[0046] Blend the deoiled asphalt and topping oil slurry according to the weight percentage and heat to 170°C, prepare the asphalt blend under the state of stirring at a rotating speed of 300rpm, then add the extracted oil, and prepare the blended asphalt under the state of stirring at a rotating speed of 300rpm; Slowly add the polymer modifier SBS to the blended asphalt at a heating temperature of 180°C and a shearing speed of 3500rpm, and shear for 25 minutes; continue to slowly add additives under a high-speed shearing state with a rotational speed of 3500rpm, and shear for 20 minutes; After the ...

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Abstract

The invention discloses high-grade road hard asphalt and a preparation method. The high-grade road hard asphalt is characterized by being prepared from the following raw materials in percentage by weight: 35-70 parts of degreased asphalt, 10-45 parts of reforming topped oil slurry, 8-20 parts of extract oil, 1-8 parts of a polymer modifying agent and 0.1-3.0 parts of an additive. The high-grade road hard asphalt disclosed by the invention has the advantages that the high temperature and low temperature performances of the asphalt are improved by adding the polymer modifying agent and the additive; high-grade road hard petroleum asphalt of which each index satisfies the JTGF40 index requirements of Traffic Department Road Asphalt Pavement Construction Technical Specifications and the needle penetration is within a range from 10-60 1/10mm can be prepared by regulating the ratio of the degreased asphalt to the reforming topped oil slurry to the extract oil and the doping ratio of the polymer modifying agent to the additive in the raw materials; the asphalt brand is adjustable and controllable.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to high-grade hard asphalt for roads, in particular to high-grade hard asphalt for roads prepared by using solvent deoiled asphalt and topping catalytic oil slurry as main raw materials and a preparation method thereof. Background technique [0002] Due to the diversity of climate and the complexity of traffic conditions, asphalt pavement has various degrees of asphalt high temperature stability and water damage diseases such as rutting, wrapping, shifting, potholes, pumping and network cracking during the use of asphalt pavement. These diseases make the performance of asphalt pavement decline rapidly, greatly reducing the social and economic benefits of the road. Therefore, how to improve the high temperature stability, fatigue resistance and water damage resistance of asphalt pavement has become the main problem faced by asphalt pavement. If there is a kind of asphalt binder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L9/06C08K5/01
CPCY02A30/30
Inventor 梁明范维玉辛雪罗辉南国枝孙华东赵品晖孔祥军徐振钱成多
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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