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Modified asphalt and preparing method thereof

A technology of modified asphalt and deoiled asphalt, applied in building components, building insulation materials, construction and other directions, can solve the problems of unstable properties, poor compatibility, uneven road asphalt, etc., and achieves simple preparation process, low cost, The effect of excellent high and low temperature performance and fatigue resistance

Active Publication Date: 2015-11-11
重庆市智翔铺道技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main application of deoiled asphalt on roads is to produce road asphalt by blending with oil slurry and residual oil produced in petroleum refining. There are problems such as poor compatibility, resulting in inhomogeneous and unstable road asphalt produced by blending, and it is difficult to take into account the high-temperature performance and low-temperature performance of the blended asphalt at the same time

Method used

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  • Modified asphalt and preparing method thereof
  • Modified asphalt and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of preparation method of modified asphalt, this modified asphalt is made up of each material of following parts by weight:

[0026] 100 parts of Zhonghai No. 50 asphalt, 80 parts of propane deoiled asphalt, 3 parts of styrene-butadiene-styrene block copolymer (SBS), 1.5 parts of polyethylene (PE), 1 part of dioctyl phthalate and sulfur 0.1 part;

[0027] Its preparation method concrete operation is:

[0028] (1) After heating Zhonghai No. 50 asphalt to 170-175°C in advance, add propane deoiled asphalt and stir well;

[0029] (2) Add SBS, PE and dioctyl phthalate, stir and swell for 10 minutes;

[0030] (3) Add sulfur at last, and then use a high-speed shearing machine to shear for 40 minutes at a shear rate of 5000 r / min. After shearing, continue stirring and developing for 2 hours to obtain the modified asphalt of the present invention.

Embodiment 2

[0032] A kind of preparation method of modified asphalt, this modified asphalt is made up of each material of following parts by weight:

[0033] 100 parts of Zhonghai No. 70 asphalt, 80 parts of propane deoiled asphalt, 2 parts of styrene-butadiene-styrene block copolymer (SBS), 2 parts of styrene-isoprene-styrene block copolymer (SIS) 2 parts, polyethylene (PE) 1.5 parts, dioctyl phthalate 1 part and sulfur 0.1 part;

[0034] Its preparation method concrete operation is:

[0035] (1) After heating Zhonghai No. 70 asphalt to 170-175°C in advance, add propane deoiled asphalt and stir well;

[0036] (2) Add SBS, SIS, PE and dioctyl phthalate, stir and swell for 15 minutes;

[0037] (3) Add sulfur at last, and then use a high-speed shearing machine to shear for 40 minutes at a shear rate of 6000 r / min. After shearing, continue stirring and developing for 2 hours to obtain the modified asphalt of the present invention.

Embodiment 3

[0039] A kind of preparation method of modified asphalt, this modified asphalt is made up of each material of following parts by weight:

[0040] 100 parts of SK70 asphalt, 90 parts of butane deoiled asphalt, 4 parts of styrene-isoprene-styrene block copolymer (SIS), 1 part of ethylene-vinyl acetate copolymer (EVA), phthalate 1 part of dimethyl formate and 0.15 part of sulfur;

[0041] Its preparation method concrete operation is:

[0042] (1) After heating SK70 asphalt to 175-180°C in advance, add butane deoiled asphalt and stir well;

[0043] (2) Add SIS, EVA and dimethyl phthalate, stir and swell for 15 minutes;

[0044] (3) Add sulfur at last, and then use a high-speed shearing machine to shear for 60 minutes at a shear rate of 7000 r / min. After shearing, continue stirring and developing for 2.5 hours to obtain the modified asphalt of the present invention.

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Abstract

The invention discloses modified asphalt. The modified asphalt comprises matrix asphalt, deoiled asphalt, thermoplastic rubber elastomer, thermoplastic resin, a plasticizer and a stabilizer. The modified asphalt has the good high-temperature and low-temperature resisting performance and the good anti-fatigue performance; on the basis that the modified asphalt can serve as pouring type asphalt to be combined and used, the production cost of the pouring type asphalt can also be reduced; the preparing method of the modified asphalt is simple in technology and low in cost, and the production technology of the novel pouring type asphalt is simplified.

Description

technical field [0001] The invention relates to a pouring pavement structure applied to a steel bridge deck, in particular to a modified asphalt and a preparation method thereof. Background technique [0002] With the rapid development of my country's highway transportation, the construction mileage of high-grade highways has increased rapidly, and steel structure bridges have also entered the climax of construction. Cast asphalt concrete has strong deformation ability, good followability with steel bridge deck, and excellent resistance to low temperature and fatigue cracking. Therefore, cast asphalt concrete is widely used in the pavement of steel bridge decks at present. [0003] In cast asphalt concrete, the content of fine aggregate, mineral powder and asphalt is high, and the coarse aggregate is in a suspended state. Its strength mainly depends on the strength of the asphalt mastic itself and the friction between the asphalt mastic and the coarse aggregate. The conven...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L23/08C08L23/06C08L23/12C08K5/12C08K5/103C08K3/06
Inventor 盛兴跃李睿李璐郝增恒王民
Owner 重庆市智翔铺道技术工程有限公司
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