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A high softening point asphalt modifier, asphalt composition and preparation method thereof

A high softening point asphalt, high softening point technology, applied in building structures, building components, building insulation materials, etc., to achieve the effect of increasing specific surface area, widening raw materials, and increasing expansion rate

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no in-depth discussion on how to improve the bitumen software point

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put the expandable graphite into the calcination furnace, heat it, and calcine it at 1000°C for 5 hours, then cool it down and take it out of the furnace to obtain expandable graphite A1 with an expansion rate of not less than 150.

[0026] Put the expandable graphite into the calcination furnace, heat it, and calcine it at 600°C for 12 hours, then cool it down and take it out of the furnace to obtain expandable graphite A2 with an expansion rate of not less than 100.

[0027] No expandable graphite A3 calcined at high temperature.

Embodiment 2

[0029] Heat 80 parts of road asphalt with a softening point of 40°C to about 190°C, add 20 parts of expandable graphite A1, and stir for 30 minutes at a stirrer speed of 800 rpm. Continue heating to about 230°C, and stir for 10 hours at a stirrer speed of 2000 rpm. After the stirring process is completed, the material can be discharged, cooled to room temperature, and the target product is obtained. The softening point of the target product asphalt is 112°C.

Embodiment 3

[0031] Heat 90 parts of road asphalt with a softening point of 40°C to about 140°C, add 10 parts of expandable graphite A1, and stir for 30 minutes at a stirrer speed of 800 rpm. Continue heating to about 200°C, and stir for 6 hours at a stirrer speed of 2500 rpm. After the stirring process is completed, the material can be discharged, cooled to room temperature, and the target product is obtained. The softening point of the target product asphalt is 73°C.

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Abstract

The invention provides a high softening point asphalt modifier and a preparation method thereof. The modifier is calcined expandable graphite, and the expansion rate of the expandable graphite is not less than 50 times. The expansion temperature of the expandable graphite is 400-1200°C, and the expandable graphite starts to expand at a high temperature above 400°C. At the same time, the invention provides a high softening point road asphalt composition prepared by using the high softening point asphalt modifier and a preparation method thereof. In the present invention, because the expandable graphite is selected to be calcined, the expansion rate of the graphite is increased, and the specific surface area is increased. Enhances the interaction with petroleum asphalt, thus improving the high temperature performance of asphalt products. Widen the raw materials for producing high softening point road asphalt.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and mainly relates to a high softening point asphalt modifier and a method for preparing a high softening point road asphalt composition using the modifier. Background technique [0002] Compared with cement pavement, asphalt pavement is often inferior in bearing capacity, temperature sensitivity, and high temperature stability. In most parts of our country, the high temperature in summer is about 35~40℃, the road surface temperature can reach 60~65℃, and the high temperature lasts for a long time. Under the action of heavy traffic, the asphalt pavement is prone to rutting, shifting and wrapping , oil flooding and other high temperature damage. Studies have shown that the high-temperature damage of asphalt pavement is closely related to the high-temperature performance of asphalt, and the contribution rate of asphalt material properties to high-temperature rutting accounts for about 40%. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K3/04
Inventor 徐青柏陈杰宣根海石君章
Owner CHINA PETROLEUM & CHEM CORP
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