Asphalt for paving

A technology of asphalt and straight-run asphalt, which is applied in the field of asphalt for traffic road paving, and can solve problems such as cumbersome air blowing operations, road cracks, and easy deterioration

Inactive Publication Date: 2005-04-27
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the production method of straight-run bitumen, this production method requires complicated gas blowing operation (operation of blowing air into vacuum residue under heating at 200-300°C for several hours) in addition to distillation operation. Shortcomings
Moreover, roads paved with semi-oxidized asphalt are prone to cracks
In addition, semi-oxidized asphalt has the disadvantage of being easily deteriorated due to heating during transportation, storage and mixing with paving materials.

Method used

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  • Asphalt for paving

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0112] 50% by volume of crude oil (A) (crude oil (1)) is mixed with 50% by volume of crude oil (a) (crude oil (2)), and the mixed crude oil is subjected to atmospheric distillation. Carry out vacuum distillation at 550°C, 540°C and 530°C respectively to obtain asphalt for paving. The properties of the asphalt are shown in Table 3. The ratio of the elongation to the viscosity of the film heating test of the paving asphalt with a penetration of 48 (1 / 10mm) at 25°C is higher than that of the semi-oxidized asphalt shown in Comparative Example 1 described later. Good performance. In addition, compared with a crude oil-derived straight-run pitch shown in Comparative Example 2 described later, it not only has a large penetration, but also has a high viscosity at 60° C. and other properties are also good.

Embodiment 4

[0114] 50% by volume of crude oil (B) (crude oil (1)) and 50% by volume of crude oil (b) (crude oil (2)) are mixed, the mixed crude oil is subjected to atmospheric distillation, and the obtained atmospheric residue is subjected to vacuum distillation Until the cutting fraction temperature is 570°C, bitumen for road paving is obtained. Table 3 shows the asphalt properties.

Embodiment 5

[0116] 30% by volume of crude oil (B) (crude oil (1)) and 70% by volume of crude oil (b) (crude oil (2)) were mixed, the mixed crude oil was subjected to atmospheric distillation, and the resulting atmospheric pressure was distilled at a cut fraction temperature of 580°C. The residual oil is distilled under reduced pressure to obtain bitumen for road paving. Table 3 shows the asphalt properties.

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Abstract

The present invention provides a method for producing asphalt with 30 to 100 (1 / 10 mm) penetration at 25 DEG C and high viscosity in which viscosity at 60 DEG C is a fixed value or more in the range of the penetration by a simple operation without requiring a complicated blowing operation, the value is obtained by formula (1): log Y =6.16 - 0.109 PT + 1.84 * 10 <-3> PT <2> - 1.53 * 10 <-5> PT <3> +4.80 * 10 <-3> PT < 4>; where Y is the viscosity (P) of the asphalt at the temperature of 60 DEG C; PT is the penetration (1 / 10 mm) at the temperature of 25 DEG C.

Description

[technical field] [0001] The present invention relates to asphalt for paving traffic roads. [Background technique] [0002] In the past, straight-run asphalt with a penetration of 40-100 (1 / 10mm) at 25°C was used as asphalt for road paving. However, ruts (ruts) were formed on traffic roads, which may hinder the safe driving of vehicles. question. [0003] As a countermeasure to solve this problem, fewer rutting grooves are required, and the penetration at 25°C is 40-100 (1 / 10mm), and the viscosity at 60°C is lower than the 3000-5000P (poise) (300-5000P) of straight run asphalt in the past. 500Pa·s) high straight-run asphalt. [0004] However, pitches having a penetration of 30 to 100 (1 / 10 mm) at 25°C and a viscosity at 60°C above a certain value within the penetration range have not been produced from straight-run pitches. [0005] Furthermore, so-called semi-oxidized pitch produced by blowing air into the vacuum residue obtained by distilling crude oil for several hours...

Claims

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Application Information

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IPC IPC(8): C10C3/06
Inventor 本城勋铃木博石川胜彦小林健一品田孝男
Owner NIPPON OIL CO LTD
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