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Renewable asphalt mixture modifier for absorbing automobile exhaust and preparation method thereof

A technology for asphalt mixture and automobile exhaust, applied in the direction of separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of serious secondary pollution, affecting the road surface, harsh microbial growth and living conditions, etc., and achieve microscopic surface tension The effect of large, efficient absorption capacity, and simple and easy equipment

Active Publication Date: 2015-05-13
SHANGHAI PUDONG ROAD & BRIDGE CONSTR +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microbial absorption conversion method is environmentally friendly and economical, but the growth and living conditions of microorganisms are harsh, and most of them are in anaerobic and humid environments, and the absorption conversion efficiency is low; the photoelectric catalytic conversion method has low catalytic conversion efficiency and is uneconomical. Secondary polluting gases are likely to be produced during the conversion process, which is not suitable for open conditions such as roads; the thermal catalytic conversion method has high energy consumption, serious secondary pollution, and harsh operating temperature conditions. It is generally implemented at a temperature above 100°C, which seriously affects the road surface. , especially the structural and functional properties of asphalt mixture pavement, greatly shortening its service life
The physical method is economical and environmentally friendly, but the capacity and depth of absorbing gas are limited. The chemical method has a large absorption capacity and high depth, but chemical reagents are easy to corrode the binder and aggregate.
[0004] Therefore, due to the limitations of these methods and the particularity of the road field, it is difficult to apply them in the road field

Method used

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  • Renewable asphalt mixture modifier for absorbing automobile exhaust and preparation method thereof
  • Renewable asphalt mixture modifier for absorbing automobile exhaust and preparation method thereof
  • Renewable asphalt mixture modifier for absorbing automobile exhaust and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First prepare a sodium hydroxide solution with a concentration of 30wt% with pure water; then the particle diameter is 1mm, the microscopic pore size range is 3-150nm, and the specific surface area is 700m 2 / g of activated carbon particles were placed in deionized water at 50°C, cleaned with an ultrasonic cleaner at a frequency of 40,000 Hz for 8 minutes; dried again in a constant temperature vacuum oven at 75°C for 6.5 hours; finally, the dried activated carbon particles were impregnated in sodium hydroxide solution for 40 minutes; finally, the activated carbon adsorbed with sodium hydroxide was placed in a constant temperature vacuum oven at 75°C and dried for 7 hours to prepare a modifier that can be used as an asphalt mixture for absorbing automobile exhaust.

Embodiment 2

[0028] First, prepare a sodium hydroxide solution with a concentration of 40wt% with pure water; 2 / g activated alumina particles were placed in deionized water at 60°C, cleaned with an ultrasonic cleaner at a frequency of 60,000Hz for 6min; dried again in a constant temperature vacuum oven at 80°C for 5h; finally, the dried activated carbon particles were impregnated in hydrogen Sodium solution for 50 minutes; finally, the activated carbon adsorbed with sodium hydroxide was placed in a constant temperature vacuum oven at 85°C and dried for 8 hours to prepare a modifier that can be used as an asphalt mixture for absorbing automobile exhaust.

Embodiment 3

[0030] First prepare a potassium hydroxide solution with a concentration of 35wt% with pure water; then the particle diameter is 2mm, the microscopic pore size range is 1.5-45nm, and the specific surface area is 360m 2 / g mesoporous alumina particles were placed in deionized water at 65°C, cleaned with an ultrasonic cleaner at a frequency of 80,000 Hz for 9 minutes; dried again in a constant temperature vacuum oven at 85°C for 5 hours; finally, the dried activated carbon particles were impregnated in hydrogen Potassium oxide solution for 60 minutes; finally, the activated carbon adsorbed with potassium hydroxide was placed in a constant temperature vacuum oven at 85°C and dried for 6 hours to prepare a modifier that can be used as an asphalt mixture for absorbing automobile exhaust.

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Abstract

The invention discloses a renewable asphalt mixture modifier for absorbing automobile exhaust, comprising 80-90 weight parts of porous material and 10-20 weight parts of alkaline compound for dipping the porous material. The invention simultaneously discloses a preparation method of the modifier, comprising the following steps: (1) preparing the alkaline compound and purified water into a solution with the alkali concentration of 10-40 wt%; (2) putting the porous material in a container filled with 40-60 DEG C deionized water, and cleaning the porous material with an ultrasonic cleaning machine for 5-10 min; (3) putting the porous material in a vacuum baking oven with a constant temperature of 50-100 DEG C to dry for 5-10h; (4) putting the porous material in the prepared solution and dipping; and (5) putting the porous material after dipping in the vacuum baking oven with a constant temperature to dry for 5-10h to prepare the renewable asphalt mixture modifier. The asphalt mixture modifier of the invention has efficient ability to absorb automobile exhaust, the modifier has the advantages of economy, environmental protection, and easy regeneration, and can be recycled, and the operation method for preparing the modifier is simple and easy to practice.

Description

technical field [0001] The invention relates to the intersecting field of road composite materials and environmental protection, in particular to the use of porous materials to prepare a renewable asphalt mixture modifier for absorbing automobile tail gas and a preparation method. Background technique [0002] The vigorous development of the economy has greatly promoted the national enthusiasm for automobile demand. However, due to the sharp increase in the number of cars, the generation of a large amount of exhaust gas has caused heavy pressure on the urban environment. Under the situation that the urban living environment is deteriorating day by day and the national awareness of environmental protection is increasing, how to effectively deal with automobile exhaust has become one of the urgent issues in the field of environmental protection, especially in the field of road environmental protection. [0003] There are a variety of gas treatment methods that have been appli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/30B01J20/20B01J20/08B01D53/92
Inventor 邓国民陈爱民赫振华闫国杰连萍马利志胡睿李交
Owner SHANGHAI PUDONG ROAD & BRIDGE CONSTR