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Preparation method of anti-aging nano-organic montmorillonite modified asphalt

A technology of organically matting and modifying asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of inability to adapt to the improvement effect of asphalt's aging resistance and poor compatibility, and achieve aging resistance and comprehensive road quality. Improved performance, improved aging resistance, and excellent aging resistance

Inactive Publication Date: 2017-09-22
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under certain conditions of use, the most critical factor determining the durability of asphalt is the chemical composition and structure of asphalt. Therefore, the research of asphalt materials with strong aging resistance can fundamentally and source improve road durability and service life. Generally speaking, it is mainly to start with adding anti-aging agents to asphalt to improve the anti-aging ability of asphalt. At present, polymer-based anti-aging agents are used more. However, polymers and asphalt have great differences in their physical properties. The difference is that the compatibility of the two is poor, and the effect of improving the aging resistance of asphalt cannot meet the needs of the current traffic development. Therefore, a modified asphalt material with better aging resistance has been developed to improve the durability and service life of asphalt pavement. , it is crucial

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Disperse 3 parts of Na-MMT into 60 parts of deionized water, stir at room temperature and 300r / min for 2 hours, pour the stirred Na-MMT dispersion into a three-necked flask, and place the three-necked flask in a constant temperature water tank to heat. Take 1.3 parts of 1827 and make it into a solution. After the MMT dispersion in the flask reaches 80°C, slowly add the pre-prepared 1827 solution into the three-necked flask under the condition of 300r / min, continue to stir for 4 hours, and let it stand naturally to room temperature A white flocculent precipitate was obtained, and the reaction solution was suction-filtered to obtain a solid precipitate. The precipitate was repeatedly washed and suction-filtered, and the resulting filter cake was fully dried at 105°C and ground through a 200-mesh sieve to obtain 1827-OMMT, which was used for improving Preparation of permanent asphalt.

[0026] The obtained 1827-OMMT is used in the modification of base asphalt by means of m...

Embodiment 2

[0028] Disperse 2 parts of Na-MMT into 40 parts of deionized water, stir at room temperature and 200r / min for 1.5h, pour the stirred Na-MMT dispersion into a three-necked flask, and place the three-necked flask in a constant temperature water tank to heat . Take 1 portion of 1827 and make it into a solution. After the MMT dispersion in the flask reaches 70°C, slowly add the pre-prepared 1827 solution into the three-necked flask under the condition of 200r / min, continue to stir for 3 hours, and let it stand naturally to room temperature A white flocculent precipitate was obtained, and the reaction solution was suction-filtered to obtain a solid precipitate. The precipitate was repeatedly washed and suction-filtered, and the resulting filter cake was fully dried at 95°C and ground through a 200-mesh sieve to obtain 1827-OMMT, which was used for improving Preparation of permanent asphalt.

[0029] The obtained 1827-OMMT was used in the modification of matrix asphalt by means of ...

Embodiment 3

[0031] Disperse 4 parts of Na-MMT into 80 parts of deionized water, stir at room temperature and 450r / min for 2.5 hours, pour the stirred Na-MMT dispersion into a three-necked flask, and place the three-necked flask in a constant temperature water tank to heat . Take 1.7 parts of 1827 and make it into a solution. After the MMT dispersion in the flask reaches 85°C, slowly add the pre-prepared 1827 solution into the three-necked flask under the condition of 450r / min, continue to stir for 5 hours, and let it stand naturally to room temperature A white flocculent precipitate was obtained, and the reaction solution was suction-filtered to obtain a solid precipitate. The precipitate was repeatedly washed and suction-filtered, and the resulting filter cake was fully dried at 100°C and ground through a 200-mesh sieve to obtain 1827-OMMT, which was used for improving Preparation of permanent asphalt.

[0032] The obtained 1827-OMMT was used in the modification of matrix asphalt by mel...

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Abstract

The invention discloses a preparation method of anti-aging nano-organic montmorillonite modified asphalt. According to the preparation method, self-prepared nano-organic montmorillonite (1827-OMMT) is used for modifying asphalt, so that a nano-organic montmorillonite modified asphalt binder having excellent aging resistance can be obtained. The aging resistance of the obtained anti-aging nano-organic montmorillonite modified asphalt is remarkably improved compared with matrix asphalt. By adopting the different contents of 1827-OMMT, the aging resistance and synthetical pavement performance of the matrix asphalt are greatly improved, and especially, the high-temperature stability of the matrix asphalt is improved; the anti-aging nano-organic montmorillonite modified asphalt can meet the use demand of asphalt pavement at the present stage, reduces the generation of wheel ruts, improves the durability of the asphalt pavement and prolongs the service life of the asphalt pavement.

Description

technical field [0001] The invention belongs to the field of nano-modified asphalt materials, and in particular relates to a preparation method of aging-resistant nano-organized montmorillonite modified asphalt. Background technique [0002] As a temperature-sensitive material, asphalt is affected by high-temperature environments. In addition to softening and increasing fluidity, it will also age due to high temperature and strong ultraviolet rays, becoming hard and brittle, and prone to cracking , so that a large number of diseases occur in the early stage of the pavement, which greatly reduces the durability and service life of the pavement structure. During the aging process of asphalt, the internal components of the asphalt will undergo oxidation reactions, that is, the internal components of the asphalt will infiltrate oxygen, causing chemical reactions to occur inside it, such as oxidation, condensation, etc., and a series of chemical changes will occur, which will cha...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K9/04C08K3/34
CPCC08K3/346C08K9/04C08L2201/08C08K2201/011
Inventor 张增平魏龙王封朱永彪庞维强祁冰刘海婷
Owner CHANGAN UNIV
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