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Preparation of rubber asphalt mixture

A rubber asphalt and mixture technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as insufficient adhesion performance, poor high temperature performance, and reduced high temperature performance, and achieve improved adhesion and high temperature performance

Inactive Publication Date: 2011-09-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the limitation of material selection and other factors, the rubber asphalt mixture prepared by the above method is still unsatisfactory in terms of adhesion performance and high temperature performance.
The main reason for the lack of adhesion performance is that rubber asphalt has added more than 15% of rubber powder, resulting in too thick asphalt, so it is difficult to coat the surface of stone materials; the main reason for poor high temperature performance is that the adhesion performance of rubber asphalt and stone materials is reduced After that, the high temperature performance will be reduced. In addition, the asphalt content added to the rubber asphalt mixture is relatively high, which is about 50% higher than that of ordinary asphalt mixture. The mixture corresponding to the higher asphalt content has poor high temperature performance.

Method used

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  • Preparation of rubber asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare rubber asphalt mixture as follows:

[0024] 1. Add 15% tire rubber powder to 85% road petroleum asphalt (No. 70 road petroleum asphalt) based on the mass percentage of rubber asphalt, and stir and react for 45 minutes at 180°C to make rubber asphalt ;

[0025] 2. Heat the stone in 100 parts by weight of mineral aggregates to 160 ° C, add 0.1 parts by weight of N, N'-ethylene bisoleic acid amide, and stir evenly;

[0026] 3. Add 6 parts by weight of the rubber asphalt obtained in step 1 to the mixture obtained in step 2, and stir evenly to obtain a finished composite modified rubber asphalt mixture.

[0027] The stone in the above step 2 meets the following gradation requirements:

[0028] mesh size

Embodiment 2

[0037] Prepare rubber asphalt mixture as follows:

[0038] 1. Add 23% of tire rubber powder to 77% of road petroleum asphalt based on the mass percentage of rubber asphalt, and stir and react for 45 minutes at 200°C to make rubber asphalt;

[0039] 2. Heat the stone in 100 parts by weight of mineral aggregates to 200 ° C, add 0.2 parts by weight of N, N'-ethylene bisoleic acid amide, and stir evenly;

[0040] 3. Add 10 parts by weight of the asphalt rubber obtained in step 1 to the mixture obtained in step 2, and stir evenly to obtain a finished compound modified asphalt rubber mixture.

[0041] The stone meets the following gradation requirements:

[0042] mesh size

[0043] intermittent grading

Embodiment 3

[0051] Prepare rubber asphalt mixture as follows:

[0052] 1. Add 20% of tire rubber powder to 80% of road petroleum asphalt based on the mass percentage of rubber asphalt, and stir and react for 100 minutes at 180°C to make rubber asphalt;

[0053] 2. Heat the stone in 100 parts by weight of mineral aggregates to 180 ° C, add 0.3 parts by weight of N, N'-ethylene bisoleic acid amide, and stir evenly;

[0054] 3. Add 9 parts by weight of the asphalt rubber obtained in step 1 to the mixture obtained in step 2, and stir evenly to obtain a finished compound modified asphalt rubber mixture.

[0055] The stone meets the following gradation requirements:

[0056] mesh size

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Abstract

The invention discloses a method for preparing a rubber asphalt mixture. The method comprises the following steps: adding tyre rubber powder into the road petroleum asphalt, and carrying out the stirring and reaction for 45 to 120 minutes to prepare the rubber asphalt; and adding N,N'-ethidence dioleamide into the heated stone material in the mineral aggregate, stirring the mineral aggregate evenly, then adding the rubber asphalt into the mineral aggregate, and stirring the mixture evenly to obtain the composite modified rubber asphalt mixture finished product. The obtained rubber asphalt mixture can simultaneously improve the high temperature performance and bonding performance of the rubber asphalt mixture.

Description

technical field [0001] The invention relates to a method for preparing rubber asphalt mixture. Background technique [0002] Rubber asphalt refers to the modified asphalt cementing material obtained by the reaction of tire rubber powder with a content of more than 15% under high temperature and sufficient mixing conditions and the swelling reaction of asphalt. Due to the use of recycled tires as the main material for modification, it has a cost advantage compared to styrene-butadiene block copolymer (SBS) modified asphalt, but rubber asphalt with pure tire rubber formula has poor performance in terms of high temperature stability and adhesion. , There are still deficiencies in the construction performance. [0003] In order to improve the overall performance of rubber asphalt, other modifiers can be added to rubber asphalt for modification. The existing technology of applying rubber powder to asphalt pavement is mainly divided into two categories: wet method and dry method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B18/22C04B18/12
CPCY02W30/91
Inventor 黄卫东孙立军
Owner TONGJI UNIV
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