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Bituminous mixture modifier as well as preparation method and application thereof

A technology of asphalt mixture and modifier, which is applied in the field of asphalt mixture modifier and its preparation, and can solve the problems of not finding asphalt

Inactive Publication Date: 2013-01-09
深圳市科中大交通建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the modification of pavement asphalt materials has been proposed at home and abroad to improve the temperature and water resistance of the pavement, there is still no material that can greatly improve the heat and water resistance of asphalt by adding modifiers.

Method used

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  • Bituminous mixture modifier as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 67% polyethylene to 5% natural asphalt, and mix evenly in a high-speed mixer, then add 20% petroleum resin and 7% glass hollow microspheres, and continue to mix evenly; put the evenly mixed material into the twin-screw The extruder is heated to 150-170 degrees to form a molten mixture and then extruded; in the water cooling process, it is kept at 130-150 degrees to pelletize to obtain the finished product.

Embodiment 2

[0027] Add 37% polyethylene and 36% polypropylene to 9% petroleum asphalt, and mix evenly in a high-speed mixer, then add 15% petroleum resin and 3% organic water-resistant materials, and continue to mix evenly; mix evenly The final material is put into a twin-screw extruder, heated to 150-170 degrees to form a molten mixture and then extruded; during the water cooling process, it is pelletized in an environment of 130-150 degrees to obtain a finished product. The organic water-resistant material is an organic double-layer thermoplastic structure microsphere; it is a double-layer structure composed of an airbag structure and an outer copolymer shell, and the copolymer is vinylidene chloride and acrylonitrile or the two. A kind of polymer, the airbag structure is isobutane or isopentane. The expanded diameter of the bilayer thermoplastic structure is typically 10-200 μm; for unexpanded microspheres, the diameter before expansion is typically 20-60 μm.

Embodiment 3

[0029] Add 59% polypropylene to 5% petroleum asphalt, and mix evenly in a high-speed mixer, then add 24% petroleum resin and 12% glass hollow microspheres, and continue to mix evenly; put the evenly mixed material into the twin-screw The extruder is heated to 150-170 degrees to form a molten mixture and then extruded; in the water cooling process, it is kept at 130-150 degrees to pelletize to obtain the finished product.

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Abstract

The invention discloses a bituminous mixture modifier as well as a preparation method and application thereof. The bituminous mixture modifier comprises the following components in percentage by weight: 50%-70% of one substance or a mixture of two substances selected from polyethylene and polypropylene materials, 15%-35% of bonding resin, 3%-10% of bituminous material and 1%-10% of thermal-tolerant waterproof material, and the sum of various components is 100%. A modification material capable of greatly improving the thermal-tolerant waterproof property of bitumen is studied out through studying the bituminous mixture modifier. Because a hollow microsphere has the effects of absorbing heat and inhibiting other materials to carry out interior heat transmission, the bituminous mixture modifier has a heat resistant property; and simultaneously, under the heating condition, the inorganic hollow microsphere with a spherical structure can expand, thereby having a water-blocking effect.

Description

technical field [0001] The invention relates to the technical field of traffic pavement overlay materials, in particular to an asphalt mixture modifier capable of improving the performance of special asphalt in high-temperature and rainy extreme environments, as well as its preparation method and application. Background technique [0002] Asphalt mixture is a mixing system composed of mineral mixture and asphalt glue. It is a high-quality pavement overlay material composed of artificially selected and graded mineral materials and an appropriate amount of asphalt binder. According to the material composition and structure, it can be divided into continuous gradation and discontinuous gradation mixture. According to the mineral material gradation composition and porosity, it can be divided into dense gradation, semi-open gradation and open gradation mixture. According to the size of the nominal maximum particle size, it can be divided into extra-coarse type (the nominal maxim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/36C04B24/26
Inventor 张少高林秀军黄燕生
Owner 深圳市科中大交通建材有限公司
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