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Dry-method asphalt mixture modifier and preparation method thereof as well as asphalt mixture

A technology for asphalt mixture and modifier, which is applied in the field of asphalt mixture and asphalt mixture dry modifier, can solve the problems of difficulty in controlling the stability of modified asphalt, complicated preparation method of compatibilizer, and difficulty in industrialized production, etc. , to avoid compatibility and thermal stability, overcome the reduction of thermal stability, and use the process to be simple and reliable.

Active Publication Date: 2014-04-30
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1952012A discloses a thermosetting epoxy asphalt material, which uses a special compatibilizer to improve the compatibility of epoxy resin and asphalt. The stability of medium-modified asphalt is difficult to control, and the use process is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 prepares asphalt mixture dry process modifier

[0051] 1) Raw material pretreatment

[0052] Prepare raw materials according to the following weight ratio:

[0053] Epoxy resin E-12 68 Dicyandiamide 3

[0054] 2-Methylimidazole 0.1 Acrylate 0.5

[0055] Calcium carbonate 28.4

[0056] Break the above raw materials into granules and set aside;

[0057] 2) Add the crushed raw materials into a high-speed mixer and mix for 5-15 minutes, then add them into a twin-screw extruder for mixing and extrusion to obtain sheet-like extruded materials;

[0058] Wherein, the temperature of the feeding section of the extruder is 90°C, and the discharge temperature is 120°C;

[0059] The thickness of the extruded material is 1 mm.

[0060] 3) After the extruded material is naturally cooled, it is crushed to obtain a crushed material with a particle size of ≤1mm, which is the dry modifier for asphalt mixture.

Embodiment 2

[0061] Embodiment 2 prepares asphalt mixture dry process modifier

[0062] 1) Raw material pretreatment

[0063] Prepare raw materials according to the following weight ratio:

[0064] Epoxy resin 50-terminal phenolic resin 25

[0065] DMP-30 2.5 Acrylate 1

[0066] Barium sulfate 21.5 Silane coupling agent 0.1

[0067] Break the above raw materials into granules and set aside;

[0068] 2) Add the crushed raw materials into a high-speed mixer and mix for 5-15 minutes, then add them into a twin-screw extruder for mixing and extrusion to obtain sheet-like extruded materials;

[0069] Wherein, the temperature of the feeding section of the extruder is 90°C, and the discharge temperature is 120°C;

[0070] The thickness of the extruded material is 1mm.

[0071] 3) After the extruded material is naturally cooled, it is crushed to obtain a crushed material with a particle size of ≤1mm, which is the dry modifier for asphalt mixture.

Embodiment 3

[0072] Embodiment 3 prepares asphalt mixture dry process modifier

[0073] 1) Raw material pretreatment

[0074] Prepare raw materials according to the following weight ratio:

[0075] Epoxy resin E-12 70 sebacic acid dihydrazide 5.3

[0076] Acrylates 0.8 Talc 23.9

[0077] Silane coupling agent 0.1

[0078] Break the above raw materials into granules and set aside;

[0079] 2) Add the crushed raw materials into a high-speed mixer and mix for 5-15 minutes, then add them into a twin-screw extruder for mixing and extrusion to obtain sheet-like extruded materials;

[0080] Wherein, the temperature of the feeding section of the extruder is 90°C, and the discharge temperature is 120°C;

[0081] The thickness of the extruded material is 1mm.

[0082] 3) After the extruded material is naturally cooled, it is crushed to obtain a crushed material with a particle size of ≤1mm, which is the dry modifier for asphalt mixture.

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Abstract

The invention discloses a dry-method asphalt mixture modifier and a preparation method thereof as well as an asphalt mixture. The dry-method asphalt mixture modifier comprises the following raw materials in parts by weight: 35-70 parts of resin, 1-35 parts of a curing agent, 0-2.5 parts of an accelerant, 0-6 parts of a flatting agent, 20-40 parts of fillers and 0-2 parts of an auxiliary agent. The asphalt mixture comprises the following materials in parts by weight: 1-5 parts of the dry-method asphalt mixture modifier, 2-8 parts of matrix asphalt and 87-97 parts of mineral aggregates. The prepared dry-method asphalt mixture modifier adopts a dry-method modification technology, is powdery, has a small grain diameter and is easy to disperse in the asphalt mixture; the asphalt mixture prepared from the modifier is simple in operation process, can be continuously produced and is low in cost.

Description

technical field [0001] The invention belongs to the field of road engineering, and in particular relates to an asphalt mixture dry modifier, a preparation method thereof and an asphalt mixture prepared by using the modifier. Background technique [0002] In recent years, due to the rapid development of transportation, the rapid increase of traffic volume and vehicle axle load, and the channelization of driving, higher requirements have been put forward for the performance of asphalt and asphalt mixture. On the one hand, the asphalt mixture is required to have high-temperature stability without rutting; on the other hand, the asphalt is required to have low-temperature crack resistance and fatigue resistance, and to extend the service life of the pavement. Especially due to the development of asphalt pavement technology, the requirements for asphalt binder are gradually increasing. [0003] In order to improve the performance of asphalt and meet the quality index required by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L61/06C08L67/00C08L33/00C08K13/02C08K5/101C08K3/26C08K5/315C08K5/3445C08K3/30C08K3/34C08K5/25C08K3/36C08K5/3492C04B26/26E01C7/26
CPCC08L63/00C08L75/00C08L2555/22C08L2555/52C08L2555/80C08L75/04C08G59/50C08K3/36C08L33/04C08L95/00C08K3/26C08K3/34C08K3/346C08K5/101C08K5/20C08K5/3155C08K5/3445C08K5/34924C08K2003/265C08L67/00E01C7/30E01C23/00E01D22/00
Inventor 曹东伟王仕峰张艳君张海燕吴小维范勇军贾鑫贾晓鹏
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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