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Regeneration method of asphalt mixture modifier for absorbing automobile exhaust

A technology for asphalt mixture and automobile exhaust, applied in separation methods, filter regeneration, combustible gas purification/transformation, etc., can solve the problems of single types, systematic regeneration methods and technology gaps, and few technologies, and achieve low cost , Efficient and stable absorption capacity, simple process and equipment

Active Publication Date: 2012-10-17
SHANGHAI PUDONG ROAD & BRIDGE CONSTR +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Looking at the research and application of automobile exhaust emission treatment technologies in China, not only are the relevant technologies scarce in number and types, but also the systematic regeneration methods and technologies for these technologies are even blank

Method used

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  • Regeneration method of asphalt mixture modifier for absorbing automobile exhaust
  • Regeneration method of asphalt mixture modifier for absorbing automobile exhaust
  • Regeneration method of asphalt mixture modifier for absorbing automobile exhaust

Examples

Experimental program
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preparation example Construction

[0025] A preparation method of a renewable asphalt mixture modifier, the preparation steps are as follows

[0026] (1) Under airtight conditions, the basic compound and pure water are mixed into a solution with an alkali concentration of 10 to 40 wt%, and the basic compound is one or both of sodium hydroxide and potassium hydroxide;

[0027] (2) The porous material is placed in a container with 40-60°C deionized water, and the porous material is cleaned with an ultrasonic cleaning machine at a frequency of 25000-100000 Hz for 5-10 minutes; the porous material is powdered activated carbon, activated carbon particles , one or more of activated carbon fiber, carbon black, mesoporous alumina, and activated alumina; wherein the particle diameter of the powdered activated carbon and the activated carbon fiber ranges from 0.01 to 500 μm, and the micropore diameter ranges from 1 to 300 nm, The specific surface area is 500~1600m 2 / g; the particle diameter range of the activated carbo...

Embodiment 1

[0045]For the AC-13 asphalt mixture experimental road section, domestic asphalt mixture pavement function recovery vehicles were used at a driving speed of 2.5km / h. The modifier and blockage were recovered by adsorption of sewage in the form of high-pressure water washing and cavitation cleaning; and then Put the recyclables into a 1m×2m×2m plastic container with water as the dispersion medium, and stir for 40min at a stirring speed of 20r / min; after the stirring stops, let the mixed solution system of water and recyclables stand for 50min, and then filter out Floating objects on the water surface; then use a filter screen with specifications from 1-800 mesh square holes to screen in turn. According to the particle size range of the modifier 4-10mm, remove the recyclables with a particle size smaller than 4mm and larger than 10mm, and the remaining recycled The main body of the object is the modifier; then the modifier is cleaned with the remaining sewage after filtering the re...

Embodiment 2

[0047] For the AC-20 asphalt mixture experimental road section, domestic asphalt mixture pavement function recovery vehicles are used at a speed of 1.5km / h. The modifier and blockage are recovered by adsorption of sewage in the form of high-pressure water washing and cavitation cleaning; Put the material into a 2m×4m×3m plastic container with water as the dispersion medium, and stir for 50min at a stirring speed of 40r / min; after the stirring stops, let the mixed solution system of water and recyclate stand for 60min, and filter off the water surface Floating matter; then use the specifications to screen in turn from 1-800 mesh square hole filter sieves, according to the particle size range of the modifier 1-15mm, remove the recyclables smaller than 1mm and larger than 15mm, and the remaining main body It is the modifier; then use the remaining sewage after filtering the recyclate to clean the modifier. The ultrasonic cleaning machine is the auxiliary cleaning equipment. The cl...

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Abstract

The invention discloses a regeneration method of an asphalt mixture modifier for absorbing automobile exhaust, comprising the following steps: (1) cleaning and recycling: cleaning asphalt pavements paved with the modifier for asphalt mixtures by using high pressure water, then conducting vacuum suction, and recycling the modifier and clogs in gaps obtained after cleaning; (2) screening: filtering and screening the regenerants obtained by the step (1), removing the regenerants which have the particle size that is larger than that of the modifier and less than that of the modifier, and then carrying out ultrasonic cleaning on the screened regenerants; and (3) activating: dipping the modifier processed by ultrasonic cleaning in an alkali solution with the concentration of 10-40 wt% for 30-60 min, and then drying for 5-10 h in a vacuum environment at a constant temperature of 50-100 DEG C to obtain the activated modifier. The regeneration method of the invention has the advantages of simpleness, easiness in operate, economy, environmental protection, and general applicability, is not only suitable for generating modifiers for alkali-containing composite porous materials, but also suitable for generating other asphalt mixture modifiers for absorbing automobile exhaust.

Description

technical field [0001] The invention relates to the intersecting field of road composite materials and environmental protection, in particular to a regeneration method for preparing asphalt mixture modifiers for absorbing automobile tail gas by using porous materials. Background technique [0002] With the development of the economy, the acceleration of urbanization, the improvement of people's living standards, the demand for automobiles has increased sharply, which has led to the increase of automobile exhaust emissions, resulting in serious urban air pollution. In recent years, the research and application of automobile exhaust treatment technologies such as photocatalytic degradation and physical and chemical absorption of automobile exhaust have alleviated the contradiction between automobile exhaust emissions and urban air quality to a certain extent. However, these technologies are limited by their own limitations and the particularity of traffic roads. Not only is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/10E01C9/00B01J20/34
Inventor 邓国民陈爱民赫振华闫国杰连萍马利志李交胡睿
Owner SHANGHAI PUDONG ROAD & BRIDGE CONSTR
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