A kind of wide area asphalt and preparation method thereof

A kind of asphalt and wide-area technology, which is applied in the field of wide-area asphalt and its preparation, can solve the shortage of wide-area asphalt raw materials and other problems, achieve excellent high temperature stability, high penetration index, and change the effect of temperature sensitivity

Active Publication Date: 2019-03-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to solve the shortage of wide-area asphalt raw materials produced by the existing process, and to produce wide-area asphalt with excellent high temperature stability and high penetration index PI value

Method used

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  • A kind of wide area asphalt and preparation method thereof
  • A kind of wide area asphalt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The vacuum residue of 97wt% atmospheric and vacuum equipment was heated at 180°C for 1.5 hours to make it into a fluid state; then 3wt% calcium oxide was added to the flowing soft asphalt, and the reaction temperature was controlled to be 180°C. High-speed shearing at a speed of 4000 rpm for 40 minutes; the prepared asphalt sample was kept at a temperature of 160°C for 1 hour to obtain a wide-area asphalt product. Among them, the properties of the vacuum residue raw material of the atmospheric and vacuum unit are shown in Table 1, and the properties of the obtained wide-area asphalt product are shown in Table 4.

Embodiment 2

[0062] Heat 98wt% of the vacuum residue of the atmospheric and vacuum unit at 150°C for 3 hours to make it flow; then add 2wt% calcium hydroxide to the flowable soft asphalt, and control the reaction temperature to 150°C , shear at a high speed of 6000 rpm for 40 minutes; keep the prepared asphalt sample at a constant temperature of 160°C for 40 minutes to obtain a wide-area asphalt product. Among them, the properties of the vacuum residue raw material of the atmospheric and vacuum unit are shown in Table 1, and the properties of the obtained wide-area asphalt product are shown in Table 4.

Embodiment 3

[0064] 95wt% real boiling point distillation device deep-drawn vacuum residue was heated at a temperature of 120°C for 1 hour to be in a fluid state; then 5wt% calcium oxide was added to the fluid vacuum residue to control the reaction temperature to 120°C, high-speed shearing at a speed of 2000 rpm for 10 minutes; keep the prepared asphalt sample at a constant temperature of 120°C for 1.5 hours to obtain a wide-area asphalt product. Among them, the properties of the vacuum residue raw material drawn from the true boiling point distillation unit are shown in Table 2, and the properties of the wide-area bitumen obtained are shown in Table 4.

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Abstract

The invention relates to wide-area asphalt and a preparation method thereof, wherein the wide-area asphalt is prepared by adding a chemical modifier to vacuum residue or soft asphalt. The method particularly includes the steps of: heating raw material into fluid status, adding the chemical modifier, performing high-speed shearing, and uniformly mixing the mixture at constant temperature to prepare the wide-area asphalt. The wide-area asphalt has high penetration index and high-temperature performance and can be used for paving traffic road being high in traffic load and having heavy load and ultra-heavy load in a region having high day-night temperature difference.

Description

technical field [0001] The invention relates to a wide-area asphalt and a preparation method thereof, more specifically, a method for preparing wide-area asphalt by using residual oil or soft asphalt through a modified high-speed shearing process. Background technique [0002] With the rapid development of my country's economy, the traffic volume of highways is increasing day by day, and the problems of overloading and heavy loading are becoming more and more prominent. In addition, due to the gradual warming of the global climate, the quality of road surfaces is severely tested. The quality of the road surface directly affects the speed of the vehicle, transportation cost, safety and comfort, and the quality of the road surface is of great significance to the economic and social benefits of the entire road transportation. [0003] Wide area asphalt is the Chinese translation of the English word Multiphalte. At present, there is no unified technical specification requiremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K3/22
Inventor 汪太龙田欢魏民宋岩先马作侠于洋刘海澄张华
Owner PETROCHINA CO LTD
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