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A method of recycling asphalt pavement

A technology of asphalt pavement and asphalt regeneration agent, which is applied in building components, building insulation materials, buildings, etc., can solve the problem of volatilization of harmful components in asphalt smoke, and achieve the effect of making up for the lack of performance, good high temperature resistance, and good combination

Active Publication Date: 2022-07-01
广东宏骏建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of volatilization of harmful components in asphalt fumes, this application provides a new asphalt pavement regeneration method

Method used

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  • A method of recycling asphalt pavement
  • A method of recycling asphalt pavement
  • A method of recycling asphalt pavement

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0056] Nano TiO 2 / ACF material is prepared by the following steps:

[0057]Step A: take 10 parts by weight of activated carbon fibers, condense and reflux with isopropanol for 25min at a temperature of 82°C; wherein the fiber diameter of the activated carbon fibers is 5 μm;

[0058] Step B: add the activated carbon fibers after the condensation and reflux treatment in step A into 80 parts by weight of nitric acid solution, oil bath for 4 hours at a temperature of 120 ° C, and then filter, and repeatedly rinse the filtered activated carbon fibers with deionized water, The modified activated carbon fiber is obtained; the mass fraction of the nitric acid solution is 60%;

[0059] Step C: take 5 parts by weight of nano-titanium dioxide, add it to 100 parts by weight of isopropanol aqueous solution, and ultrasonically disperse it for 15min under the condition of a frequency of 15000Hz to obtain a dispersion material; wherein the particle size of nano-titanium dioxide is 20nm, and...

preparation example 2

[0062] The difference between Preparation Example 2 and Preparation Example 3 and the above-mentioned Preparation Example 1 lies in the amount of material and process conditions, as shown in Table 2 below:

[0063] Table 2 Condition parameter table of preparation examples 1-3

[0064]

preparation example 4

[0066] The difference between this preparation example and the above-mentioned preparation example 2 is that microwave heating is used for the activated carbon fiber, and the specific steps are as follows:

[0067] Step A: take 13 parts by weight of activated carbon fibers, condense and reflux with isopropanol for 23 minutes at a temperature of 83°C; wherein the fiber diameter of the activated carbon fibers is 10 μm;

[0068] Step B: the activated carbon fiber after the condensation and reflux treatment in step A is placed in the microwave radiation treatment of 800W and 150V for 3min, and taken out to obtain the modified activated carbon fiber;

[0069] Step C: take 8 parts by weight of nano-titanium dioxide, add it to 105 parts by weight of isopropanol aqueous solution, and ultrasonically disperse it for 13min under the condition of a frequency of 16000Hz to obtain a dispersion material; wherein the particle size of nano-titanium dioxide is 30nm, and the isopropanol aqueous s...

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Abstract

The present application relates to the field of asphalt recycling, and specifically discloses a method for recycling asphalt pavement. The method includes the following steps: S1: milling and crushing the old asphalt pavement, and then recycling the old pavement asphalt material; S2: heating the old pavement asphalt material, adding aggregate and asphalt rejuvenating agent to prepare a mixture A; S3: taking SBS modified asphalt, with nano-TiO 2 / ACF material and additives are mixed to prepare mixture B; then mixture B is heated to 145-165 ° C, mixture A is added, and after stirring evenly, recycled asphalt material is prepared; S4: the recycled asphalt obtained in step S3 is prepared The asphalt pavement regeneration treatment is completed after the material is paved and compacted. The regeneration method of the present application is simple to operate, and the asphalt pavement laid with the recycled asphalt material has the properties of high temperature resistance, low temperature resistance, elasticity, skid resistance, fatigue resistance and aging resistance, and can adsorb and decompose the asphalt material in the production process. , Asphalt fumes generated during the paving process.

Description

technical field [0001] The present application relates to the field of asphalt regeneration, and more particularly, it relates to a novel asphalt pavement regeneration method. Background technique [0002] At present, due to the construction process of highway pavement, more than 90% of high-grade highways in my country use semi-rigid materials as asphalt pavement base and subbase, which have strong load absorption capacity and can withstand greater deformation and deflection. , When the load is transferred from the semi-rigid material to the surface of the rigid material (cement concrete), the load intensity is attenuated, which is beneficial to control the reflection crack and prolong the service life of the pavement. [0003] During the use of asphalt pavement, due to the long-term exposure to sunlight, air and water, as well as the physical and chemical interactions between asphalt and mineral aggregates, asphalt molecules will undergo oxidation and polymerization, making...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L91/00C08L83/14C08K13/06C08K9/02C08K7/06C08K3/22C08K5/12
CPCC08L95/00C08K2003/2241C08K2201/011C08K2201/003C08L2205/035C08L2207/22C08L53/02C08L91/00C08L83/14C08K13/06C08K9/02C08K7/06C08K3/22C08K5/12
Inventor 林翠洁黎雄武江岳荣
Owner 广东宏骏建筑工程有限公司
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