Road asphalt agglutinate and its preparation method

A technology of asphalt glue and binder, which is applied in the field of asphalt binder and its preparation, can solve the problems of low asphaltene content, low viscosity at 60°C and low softening point, and achieve the effects of low price, improved performance index, and low cost

Inactive Publication Date: 2004-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low viscosity at 60°C and low softening point in the case of high penetration of existing paving asphalt, the present invention proposes an asphalt binder with high colloid content and low asphaltene content and its preparation method, The asphalt binder has good anti-rutting performance under relatively high pavement temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With a density of 0.94g / cm at 20°C 3 , Sudan Fula crude oil belonging to the naphthenic-intermediate base is used as raw material, and the vacuum residue fraction is obtained by distillation on the real boiling point distillation device in the laboratory. The maximum distillation temperature corresponds to the normal pressure temperature of 520 ° C. The properties of slag reduction are as follows: penetration at 25°C is greater than 300 1 / 10mm, viscosity at 60°C is 6.6 Pa·s, saturation content is 20.5m%, aromatic content is 32.9m%, gum is 46.1m%, asphaltene is 0.5m%.

[0019] Using butane as solvent, solvent deasphalting experiment was carried out on vacuum residue in supercritical solvent deasphalting unit. The temperature at the top of the tower is 174°C, the temperature in the tower is 167°C, the bottom of the tower is 160°C, the solvent ratio is 6:1, and the operating pressure is 9.2MPa. When the yield of deasphalted oil is 39m% and 45m%, respectively, the bitumen ...

Embodiment 2

[0031] Using propane as a solvent, a solvent deasphalting test was carried out on the vacuum residue in Example 1 on a supercritical solvent deasphalting device. The temperature at the top of the tower is 118°C, the temperature in the tower is 112°C, the bottom of the tower is 105°C, the solvent ratio is 6:1, and the operating pressure is 12.0MPa. When the yield of deasphalted oil is 31m%, the deoiled asphalt with a penetration of 240 1 / 10mm and a softening point of 41.5°C can be obtained. Take 500g of deoiled asphalt to carry out oxidation test on a laboratory small-scale batch oxidation device, the reaction temperature is 250°C, and the blowing volume is 0.3m 3 / kg.h, when the oxidation time is 2.5h and 3.0h respectively, the bitumen of the present invention can be obtained, and the properties are shown in Table 2.

[0032] Table 2

[0033] Analysis item Product 3 Product 4

[0034] Penetration (25°C), 1 / 10mm 97 70

[0035] Softening poi...

Embodiment 3

[0043] Using butane as a solvent, a solvent deasphalting test was performed on the vacuum residue in Example 1 on a supercritical solvent deasphalting device. The temperature at the top of the tower is 174°C, the temperature in the tower is 167°C, the bottom of the tower is 160°C, the solvent ratio is 6:1, and the operating pressure is 10.5MPa. When the yield of deasphalted oil is 58m%, the deoiled asphalt with a penetration of 24 1 / 10mm and a softening point of 68.3°C can be obtained. The bitumen of the present invention can be obtained by blending the bitumen with the vacuum residue in Example 1. The test results are shown in Table 3.

[0044] table 3

[0045] Analysis item Product 5 Product 6

[0046] Blending ratio

[0047] Deoiled asphalt, % 58 60

[0048] Vacuum residue, m% 42 40

[0049] Penetration (25°C), 1 / 10mm 106 94

[0050] Softening point, ℃ 48.7 49.5

[0051] Viscosity (60℃), Pa.s 209 242

[0052] Composition a...

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Abstract

An asphalt cementing material for spreading pavement in tropical region is prepared from proper heavy oil through ordinary-pressure or vacuum distilling to obtain vacuum residual oil, removing asphalt by solvent to obtain the target asphat, and optionally further treating such as oxidizing or mixing it with residual oil. Its advantages are high content of asphalt colloid, low content of asphalt, and high softening point (60 deg.C) and viscosity.

Description

1. Technical field [0001] The invention relates to a road asphalt binder and a preparation method thereof, in particular to an asphalt binder used for road paving in tropical areas and a preparation method thereof. 2. Background technology [0002] Due to its excellent thermoplasticity and viscoelasticity, asphalt is widely used in road paving, waterproof and moisture-proof, anti-corrosion and insulation. One of the most important uses is for road construction. According to statistics, the output of road asphalt in the world accounts for about 85% of the total output of asphalt. Typically, asphalt works well for pavement requirements, but with increasing traffic volumes and vehicle loads, many asphalt pavements have suffered severe damage. Especially in hot climate areas, under high temperature conditions in summer, the pavement is subjected to the repeated action of wheel rolling. When the load stress exceeds the stability limit of the asphalt mixture, it is easy to accum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/16
Inventor 李志军王仁辉刘树华陈保莲
Owner CHINA PETROLEUM & CHEM CORP
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