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High-modulus modified asphalt and preparation method thereof

A modified asphalt, high-modulus technology, used in building components, building insulation materials, buildings, etc., can solve the problems of inability to meet the requirements of low-temperature crack resistance of asphalt pavement, poor storage stability of modified asphalt, and poor low-temperature performance of asphalt. , to achieve good high temperature rutting resistance, improve softening point and improve high temperature performance.

Active Publication Date: 2020-07-10
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the anti-rutting performance of asphalt pavement, the commonly used method at present is to use low-grade hard asphalt, mainly asphalt with a penetration of about 20, or use rock asphalt and lake asphalt as modifiers to prepare low-grade modified asphalt. Asphalt, but this kind of asphalt has poor low-temperature performance and cannot meet the low-temperature crack resistance performance requirements of asphalt pavement in northern my country
However, the high-temperature performance of modified asphalt is improved by increasing the amount of SBS added to improve the high-temperature performance of modified asphalt by using high polymer modification such as SBS, which has the disadvantages of large SBS content, high price, poor storage stability of modified asphalt, and poor workability
Some researchers improved the high-temperature performance of modified asphalt by composite modification of rock asphalt and SBS. The modified asphalt prepared in this way has the disadvantage of poor storage stability.

Method used

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  • High-modulus modified asphalt and preparation method thereof
  • High-modulus modified asphalt and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0072] This embodiment provides a kind of high modulus modified asphalt, and described modified asphalt comprises the base asphalt that internal blending amount is 85%, the hard asphalt that internal blending amount is 9%, the internal blending amount is 5.4% SBS and 0.6% additives; the hard asphalt has a penetration of 0 (25°C, 0.1mm), a softening point of 147°C, a saturated content of 2wt%, and an aromatic content of 20wt%. , a colloid content of 33wt%, an asphaltene content of 45wt%, a solubility of 99.7%, and an ash content of 0.16%; the hard asphalt is a deoiled asphalt prepared by solvent deasphalting using Canadian oil sand asphalt as a raw material; the hard asphalt The preparation of hard bitumen makes the solvent used be 1 or at least 2 kinds of combinations in n-pentane, isopentane or cyclopentane; There are spiral finned tubes, and the heat transfer oil flows into the finned tubes through the upper and lower branch tubes to heat the top of the extraction tower; the...

Embodiment 2

[0078] This embodiment provides a kind of high modulus modified asphalt, and described modified asphalt comprises the base asphalt with internal blending amount of 85%, the hard asphalt with internal blending amount of 8.5%, the internal blending amount of 6% SBS and 0.5% additives; the hard asphalt has a penetration of 0 (25°C, 0.1mm), a softening point of 165°C, a saturated content of 1.5wt%, and an aromatic content of 16.5% wt%, colloid content 29wt%, asphaltene content 53wt%, solubility 99.5%, ash content 0.2%; the hard asphalt is deoiled asphalt prepared by solvent deasphalting process with Canadian oil sand asphalt as raw material; The preparation of above-mentioned hard asphalt makes the solvent that adopts be the combination of 1 or at least 2 kinds in normal pentane, isopentane or cyclopentane; There are spiral finned tubes inside, and the heat transfer oil flows into the finned tubes through the upper and lower branch tubes to heat the top of the extraction tower; th...

Embodiment 3

[0084] This embodiment provides a kind of high modulus modified asphalt, and described modified asphalt comprises the base asphalt that internal blending amount is 85%, the hard asphalt that internal blending amount is 9%, the internal blending amount is 5.4% SBS and 0.6% additives; the hard asphalt has a penetration of 0 (25°C, 0.1mm), a softening point of 152°C, a saturated content of 2wt%, and an aromatic content of 18wt%. , colloid content 30wt%, asphaltene content 50wt%, solubility 99.7%, ash content 0.19%; the hard bitumen is deoiled bitumen prepared by solvent deasphalting process with Canadian oil sand bitumen as raw material; the hard bitumen The preparation of hard bitumen makes the solvent used be 1 or at least 2 kinds of combinations in n-pentane, isopentane or cyclopentane; There are spiral finned tubes, and the heat transfer oil flows into the finned tubes through the upper and lower branch tubes to heat the top of the extraction tower; the condition in the prepa...

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Abstract

The invention relates to high-modulus modified asphalt and a preparation method thereof. The modified asphalt comprises matrix asphalt with the internal mixing amount of 80-85%, hard asphalt with theinternal mixing amount of 8-9%, SBS with the internal mixing amount of 4-6% and an auxiliary agent with the internal mixing amount of 0.1-1.0%. Oil sand deoiled asphalt can be cleanly and effectivelyutilized, the high-temperature anti-rutting performance of the asphalt binder is remarkably improved, the engineering cost is reduced, a pavement is thinned, and the pavement rutting disease is solved.

Description

technical field [0001] The invention relates to the technical field of road asphalt preparation, in particular to a high modulus modified asphalt and a preparation method thereof. Background technique [0002] At present, under the influence of global economic growth, unconventional oil resources such as Canadian oil sand bitumen are receiving more and more attention. Oil sand bitumen is characterized by high density, high viscosity, high sulfur, and high metal content, making it difficult to process in conventional refineries. At present, the commonly used processing scheme is to upgrade heavy oil into synthetic crude oil with low density and low viscosity, and transport it to the United States for sale through pipelines. In the upgrading process, the solvent deasphalting process is widely used due to its small investment and simple operation. The prepared deoiled asphalt is used as a gasification raw material to produce high-temperature and high-pressure steam and hydroge...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08K3/32
CPCC08L95/00C08L2205/03C08L2205/025C08K2003/329C08L53/02C08K3/32
Inventor 裴晓光刘延军王衍法蔡烈奎姜有山车金良曹传奇
Owner CHINA NAT OFFSHORE OIL CORP
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