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Air catalyst type cold-mixed modified asphalt mixture, and preparation method and application thereof

A technology for modified asphalt and cold mix asphalt, which is applied in the field of air-catalyzed cold mix modified asphalt mixture and its preparation, and can solve the problems of poor storage and use safety, slow forming and strength rise of cold mix asphalt mixture, and impact on openness. Traffic time and other issues to achieve the effect of saving construction costs

Inactive Publication Date: 2020-05-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the above-mentioned patents is that due to the addition of diesel or kerosene to the cold-mix asphalt, the molding and strength of the cold-mix asphalt mixture will increase slowly, which seriously affects the opening time for traffic, and diesel or kerosene is flammable. Storage and Less safe to use
Moreover, in the process of making the mixture, the cold-patch asphalt liquid and the aggregate still need to be heated above 60°C, which does not realize cold mixing in the true sense.

Method used

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  • Air catalyst type cold-mixed modified asphalt mixture, and preparation method and application thereof
  • Air catalyst type cold-mixed modified asphalt mixture, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0034] The air catalyst type modified asphalt stock solution of the present embodiment is made up of following weight percentage:

[0035] 100 parts by weight of asphalt;

[0036] 10 parts by weight of styrene-ethylene / butylene-styrene block copolymer;

[0037] 1 part by weight of titanium dioxide;

[0038] 1 part by weight of benzotriazole;

[0039] 30 parts by weight of diluent;

[0040] Stone: 1400 parts by weight.

[0041] Add the weighed bitumen, styrene-ethylene / butylene-styrene block copolymer, titanium dioxide, and benzotriazole into the stirring equipment, the temperature during stirring is 180°C, and the stirring time is 70 minutes. Then when the finished product is cooled to room temperature, add diluent in proportion, stir well, then put stones into the mixing pot, add the prepared cold-mix modified asphalt, and stir for 60 seconds to obtain air-catalyzed cold-mix asphalt mixture. The technical specifications of the prepared materials are shown in Table 1.

Embodiment 2

[0043] The air-catalyzed modified asphalt stock solution of the present embodiment is composed of the following weight percentages: 100 parts by weight of asphalt; 10 parts by weight of styrene-ethylene / butylene-styrene block copolymer; 0.5 parts by weight of titanium dioxide; 10 parts by weight of benzotriazole parts by weight; diluent 30 parts by weight; stone: 1400 parts by weight.

[0044] Add the weighed asphalt, styrene-ethylene / butylene-styrene block copolymer, and benzotriazole into the stirring equipment, the temperature during stirring is 180°C, and the stirring time is 70 minutes. Then when the finished product is cooled to room temperature, add diluent in proportion, stir well, then put stones into the mixing pot, add the prepared cold-mix modified asphalt, and stir for 60 seconds to obtain air-catalyzed cold-mix asphalt mixture. The technical specifications of the prepared materials are shown in Table 1.

Embodiment 3

[0046] The air-catalyzed modified asphalt stock solution of the present embodiment is composed of the following weight percentages: 100 parts by weight of asphalt; 10 parts by weight of styrene-ethylene / butylene-styrene block copolymer; 1 part by weight of titanium dioxide; 1 part by weight of benzotriazole parts by weight; diluent 10 parts by weight; stone: 1400 parts by weight.

[0047] Add the weighed bitumen, styrene-ethylene / butylene-styrene block copolymer, titanium dioxide, and benzotriazole into the stirring equipment, the temperature during stirring is 180°C, and the stirring time is 70 minutes. Then when the finished product is cooled to room temperature, add diluent in proportion, stir well, then put stones into the mixing pot, add the prepared cold-mix modified asphalt, and stir for 60 seconds to obtain air-catalyzed cold-mix asphalt mixture. The technical specifications of the prepared materials are shown in Table 1.

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Abstract

The invention relates to the field of road engineering, and concretely relates to an air catalyst type cold-mixed modified asphalt mixture, and a preparation method and an application thereof. The aircatalyst type cold-mixed modified asphalt mixture is prepared from asphalt, a styrene-ethylene / butylene-styrene copolymer, a diluent, titanium dioxide and benzotriazole. The air catalyst type cold-mixed modified asphalt mixture keeps the performances of high-viscosity styrene-ethylene / butylene-styrene copolymer modified asphalt, has excellent performances, can be stored in a sealed manner at normal temperature, can react when being opened in use and contacted with air to form strength, and is suitable for conventional pavement pit slot repair, thin overlay damage repair and pavement height difference repair. The prepared air catalyst type cold-mixed modified asphalt mixture is good in construction workability and high in strength increase speed, and traffic can be rapidly opened after construction.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to an air-catalyzed cold-mix modified asphalt mixture and its preparation method and application. Background technique [0002] Asphalt pavement has become the most common road paving choice due to its comfortable driving, low noise and easy maintenance. Traditional asphalt pavement is paved with hot-mix asphalt mixture. When producing hot-mix asphalt mixture, it often consumes a lot of energy, produces toxic and harmful gases, and increases carbon emissions, which is not in line with the concept of sustainable development. Therefore, cold-mix Asphalt mixture came into being. Cold-mix asphalt mixture can be mixed, paved, and rolled at room temperature, saving energy, ensuring the health of construction workers, simple operation, and reducing construction costs. It is a new direction for the development of road construction in the future. The technical difficulty in the preparation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/00284C04B2201/50C04B24/2676C04B14/305C04B24/128C04B24/00C04B14/04C04B24/08C04B14/14
Inventor 吕泉钟皓白黄卫东
Owner TONGJI UNIV
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