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Hard road bitumen compositions and preparation process

A kind of asphalt composition and road asphalt technology, which is applied in the direction of roads, roads, building structures, etc., can solve the problems of low temperature performance, fatigue resistance and aging resistance, limited and short-term improvement of the overall performance of the road surface, and achieve high temperature stability. Performance and anti-aging performance, simple preparation method, and the effect of reducing sensitivity

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the prior art has improved the anti-rutting ability of the pavement to a certain extent, because the asphalt as the mixture binder has not been processed or improved in any way, such hard asphalt, in addition to having hard characteristics, has no other advantages. The performance is difficult to meet the requirements of use. The pavement paved with asphalt mixture prepared in this way may have relatively good high-temperature performance in the initial stage, but it does not have good low-temperature performance, fatigue resistance, and aging resistance.
Thus, the improvement to the overall performance of the pavement is limited and short-lived

Method used

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  • Hard road bitumen compositions and preparation process
  • Hard road bitumen compositions and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Respectively with 230 parts of coal tar pitch, 160 parts of natural pitch, 280 parts of oxidized pitch, 330 parts of lubricating oil phenol refining minus four-line extraction oil (property: initial boiling point is 387 ℃, aromatic content is 47.16wt%, wax content is 0.17 wt%), 86 parts of oxidized fatty acid residue (properties: initial boiling point of 383°C, aromatic content of 28.41wr%, wax content of 0.09wt%) were added to the reactor, preheated and co-dissolved at 110°C for 2 hours . Add 498 parts of Tahe asphalt into the above mixture, heat and melt, then shear and mix at 165°C and 3300 rpm for 20 minutes. Then add 16 parts by weight Ca(OH) 2 : thiourea=3:13 chemical modifier, and after maintaining the above conditions and mixing for 20 minutes, high-performance hard road asphalt was prepared, and the performance test results are shown in Table 3.

Embodiment 2

[0035] 244 parts of solvent deoiled hard asphalt, 120 parts of delayed coking residue, 200 parts of natural asphalt, 320 parts of solvent deasphalted heavy deasphalted oil (property: initial boiling point is 417 ℃, aromatic content is 51.02wt%, wax content 1.57wt%), 60 parts of catalytic cracking oil slurry (properties: initial boiling point is 380°C, aromatic content is 53.23wt%, wax content is 0.87wt%) into the reactor, preheated at 130°C A total of 3 hours of dissolution. Add 625 parts of asphalt in the sand to the above mixture, heat and melt, and shear and mix for 20 minutes at a speed of 3300 rpm at a temperature of 170 ° C, then add 31 parts by weight of NaOH: zinc naphthenate: butanedi Acid anhydride=1:12:18 chemical modifier, and after maintaining the above conditions and mixing for 20 minutes, a high-performance hard road asphalt was prepared. The performance test results are shown in Table 3.

Embodiment 3

[0037] Respectively, 200 parts of solvent deoiled hard asphalt, 144 parts of oxidized asphalt, 200 parts of natural asphalt, 106 parts of vacuum deep-drawing residue oil, and 330 parts of lubricating oil furfural refined minus four-line extraction oil (property: initial boiling point is 392 ° C, Aroma content is 47.74wt%, wax content is 0.38wt%), and 60 parts of waste machinery oil with an initial boiling point of 430°C are respectively added to the reactor, and preheated and co-dissolved at 110°C for 1 hour. Add 517 parts of Iranian Ding deasphalt to the above mixture, after heating and melting, shear and mix for 20 minutes at a speed of 3000 rpm at 160 °C, then add 43 parts by weight of Ca(OH) 2 : iron naphthenate: thiourea=3: 28: 12 chemical modifier, and after maintaining the above conditions and mixing for 20 minutes, high-performance hard road asphalt was obtained, and the performance test results are shown in Table 3.

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Abstract

The invention discloses a hard road asphalt composition and a preparation method thereof. The composition comprises uintahite, a softener, a chemical modifying agent and basic asphalt of high asphaltene content with penetration number of less than 35 1 / 10mm. The preparation method comprises the following steps: the uintahite, the softener and the basic asphalt are added into a reactor, sheared and stirred at the temperature of 150-170 DEG C, and then chemical modifying agent is added into the reactor, sheared and stirred so as to obtain the hard road asphalt. The hard road asphalt composition has excellent high temperature stability, antifatigue performance and adhesiveness of aggregate, moderate low temperature performance and can be used for surfacing the road surface of important traffic roads through which heavy traffic and axle weight vehicles pass so as to lighten the occurrence of common road surface diseases such as tracks, upheaval, and fatigue cracking of road, etc.

Description

technical field [0001] The invention relates to a road asphalt composition and a preparation method thereof, in particular to a high-performance hard road asphalt composition and a preparation method thereof. Background technique [0002] The climate anomaly caused by the continuous and rapid development of the global greenhouse effect; the road overload service caused by the increasing traffic volume and heavy-duty vehicles have made the use environment of asphalt pavement worsening, and rutting has become the main disease of asphalt pavement. In recent years, the service life of different grades of asphalt pavements has been declining, maintenance costs have been rising, and driving safety and comfort have been greatly reduced. These road surface diseases that appear in an abnormal state can no longer be solved by traditional ideas and ways of thinking. However, theoretically speaking, the main cause of rutting disease still has to be attributed to the fact that the high-...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K5/00C08K3/22C08K5/405C08K5/098C08K5/09C08K3/16E01C7/18
Inventor 吴佩尊宁爱民李志军刘树华郭皎河
Owner CHINA PETROLEUM & CHEM CORP
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