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A kind of asphalt modifier, asphalt composition and preparation method thereof

A technology of asphalt modifier and asphalt composition, which is applied in the direction of building structure, construction, building components, etc., can solve the problems of corrosive equipment, poor compatibility of metal compounds, etc., and achieve the effect of increasing the softening point

Active Publication Date: 2019-06-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its modifiers include metal compounds and peroxides, the compatibility of metal compounds with asphalt is not good, and peroxides are easy to corrode equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Add expandable graphite A01 with a particle size of 100 mesh into the calcination furnace, heat it, and calcine it at 800°C for 4 hours, then cool down and take it out of the furnace to obtain expanded graphite A1 with an expansion rate of not less than 80 times.

[0030] Add expandable graphite A02 with a particle size of 200 mesh into the calcination furnace, heat it, and calcine it at 1000°C for 4 hours, then cool down and take it out of the furnace to obtain expanded graphite A11 with an expansion rate of not less than 150 times.

[0031] Heat 100 parts of expanded graphite A1 and 20 parts of sulfur together to 445°C to completely sublimate and atomize the sulfur, then cool and recondense to obtain asphalt modifier A2.

[0032] Heat 100 parts of expanded graphite A1 and 50 parts of sulfur together to 445°C to completely sublimate and atomize the sulfur, then cool and re-coagulate to obtain asphalt modifier A3.

[0033] Heat 100 parts of expanded graphite A11 and 40 ...

Embodiment 2

[0035] Heat 85 parts of road asphalt B1 with a softening point of 45°C to about 210°C, add 15 parts of asphalt modifier A3, and stir for 2 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.

Embodiment 3

[0037] Heat 95 parts of road asphalt B1 with a softening point of 45°C to about 170°C, add 10 parts of asphalt modifier A2, and stir for 5 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.

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PUM

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Abstract

An asphalt modifier, an asphalt composition containing the modifier and preparing methods of the modifier and the asphalt composition are disclosed. The modifier includes expandable graphite and sulphur, wherein the sulphur is loaded on the expandable graphite and the weight ratio of the sulphur to the expandable graphite s 0.02-0.60:1. The preparing method of the modifier includes calcinating the expandable graphite at a high temperature to expand the expandable graphite and loading the expandable graphite with the sulphur. The asphalt composition prepared by adopting the modifier can increase the softening point and dynamic viscosity at 60 DEG C of asphalt and does not cause storage layering or separation problems during asphalt hot storage.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and mainly relates to an asphalt modifier for increasing softening point, an asphalt composition containing the modifier and a preparation method thereof. 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 China, the high temperature in summer is above 35-40°C, and the road surface temperature can reach 60-65°C, and the high temperature lasts for a long time. Under the action of heavy-duty traffic, 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): C08L95/00C08K7/24C08K3/06
Inventor 徐青柏宣根海陈杰
Owner CHINA PETROLEUM & CHEM CORP
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