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Warm Mix Additives for Improving Asphalt High Temperature Stability and Its Application

A high-temperature stability and additive technology, applied in the field of road asphalt materials, can solve the problems of difficulty in effectively coordinating warm mixing and high-temperature performance, large emission of harmful gases, affecting the high-temperature performance of asphalt, etc., and achieves significant viscosity reduction and softening. The effect of improving and reducing high temperature viscosity

Active Publication Date: 2017-10-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, most organic warm mix agents on the market have relatively poor high temperature performance
Patent CN101831187A discloses a rubber-modified asphalt warm mix agent, which can reduce the production temperature by 30°C, but the additive in this patent reduces the softening point of rubber-modified asphalt, which affects the high-temperature performance of the asphalt
However, additives with good high-temperature performance need to be mixed, paved and rolled at higher temperatures to be effective. Patent CN101525221A discloses a novel anti-rutting agent and its production method. The material has excellent high-temperature performance, but the mixing , Paving and rolling temperatures are above 180°C, 170°C and 160°C respectively, there are problems of high fuel consumption, large emissions of harmful gases and accelerated asphalt aging
Therefore, it is always difficult to effectively coordinate the performance of warm mixing and high temperature

Method used

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  • Warm Mix Additives for Improving Asphalt High Temperature Stability and Its Application
  • Warm Mix Additives for Improving Asphalt High Temperature Stability and Its Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of a warm mix additive to improve the high temperature stability of asphalt:

[0025] Weigh the following raw materials in parts by weight: 15 parts of polypropylene, 10 parts of polyethylene, 8 parts of stearic acid, 45 parts of ethylene bisstearamide and 30 parts of oxidized polyethylene wax, and place the above raw materials in the above sequence at room temperature Put it into the stirring tank, and after stirring for 30 minutes, it will be the finished product of warm mixing additive. (the density of polyethylene used in it is 0.910g / cm 3 , the melting point of oxidized polyethylene wax is 95°C, and the melting index of polypropylene is 28g / 10min)

[0026] 400g70 # Heat the road asphalt to 140°C until the asphalt flows completely, add the warm mixing additive prepared in Example 1, the amount of the added warm mixing additive is 2% of the weight of the asphalt, start the stirring equipment to stir, and the stirring speed is 450r / min Stir for 60 minut...

Embodiment 2

[0028] Preparation of a warm mix additive to improve the high temperature stability of asphalt:

[0029] Weigh the following raw materials in parts by weight: 20 parts of polypropylene, 10 parts of polyethylene, 9 parts of stearic acid, 50 parts of ethylene bisstearamide and 35 parts of oxidized polyethylene wax, and place the above raw materials in sequence at room temperature Put it into the stirring tank, and after stirring for 30 minutes, it is the finished product of warm mixing additive. (the density of polyethylene used in it is 0.920g / cm 3 , the melting point of oxidized polyethylene wax is 105°C, and the melting index of polypropylene is 35g / 10min)

[0030] 400g70 # Heat the road asphalt to 140°C until the asphalt flows completely, add the warm mixing additive prepared in Example 2, the amount of the added warm mixing additive is 3% of the weight of the asphalt, start the stirring equipment to stir, and the stirring speed is 550r / min Stir at low temperature for 50 ...

Embodiment 3

[0032] Preparation of a warm mix additive to improve the high temperature stability of asphalt:

[0033] Weigh the following raw materials in parts by weight: 25 parts of polypropylene, 10 parts of polyethylene, 10 parts of stearic acid, 35 parts of ethylene bisstearamide and 50 parts of oxidized polyethylene wax, and place the above raw materials in sequence at room temperature Put it into the stirring tank, and after stirring for 10 minutes, it is the finished product of warm mixing additive. (The density of polyethylene used in it is 0.940g / cm 3 , the melting point of oxidized polyethylene wax is 100°C, and the melting index of polypropylene is 28g / 10min)

[0034] 400g70 # Heat the road asphalt to 130°C until the asphalt flows completely, add the warm mix additive prepared in Example 3, the amount of the added warm mix additive is 3% of the weight of the asphalt, start the stirring equipment to stir, and the stirring speed is 550r / min Stir for 60 minutes until the additi...

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Abstract

The invention belongs to the technical field of road asphalt material, and specifically relates to a warm mix additive improving high temperature stability of asphalt. The additive comprises the following raw materials: by weight, 15 to 30 parts of polypropylene, 8 to 12 parts of polyethylene, 8 to 10 parts of stearic acid, 35 to 60 parts of ethylene bis stearamide and 30 to 50 parts of oxidized polyethylene wax. The preparation and using of the warm mix additive of asphalt in the invention are simple, environmental friendly, and has low energy consumption, great viscosity reducing effect. The warm mix additive improving high temperature stability of asphalt can reduce the high temperature viscosity of asphalt effectively, improve the high temperature stability of asphalt under the condition of reducing the mixing and compaction temperatures of asphalt by 20 to 40 DEG C, and realize organic combination of warm mixing and good high temperature performance.

Description

technical field [0001] The invention belongs to the technical field of road asphalt materials, and in particular relates to a warm mixing additive for improving the high-temperature stability of asphalt and an application thereof. Background technique [0002] As a seamless continuous road surface, asphalt concrete pavement has gradually replaced cement concrete pavement due to its advantages of smooth surface, comfortable driving, good wear resistance, low noise, short construction period, simple maintenance and repair, and fast open traffic. It has become one of the main forms of road pavement in my country and developed countries. [0003] However, as a temperature-sensitive material, asphalt's performance is greatly affected by temperature. With the frequent occurrence of extreme weather and the rapid growth of heavy-duty traffic, road rutting is extremely serious. How to improve the high-temperature stability of asphalt and reduce rutting Diseases have become a key issu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/06C08L23/30C08K5/09C08K5/20C08L95/00
CPCY02A30/30
Inventor 贾丽凤高淑美许金山刘爱华马鹏程王秀丽毛冬梅
Owner CHINA PETROLEUM & CHEM CORP