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Cold paved modified asphalt mixture and its preparation method and application

A technology of modified asphalt and mixture, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of short effective construction time, complicated construction procedures, low construction performance, etc., and reduce waste of resources and environmental pollution, reduce road operating costs, and improve construction ease

Active Publication Date: 2022-05-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Hot mix and warm mix asphalt mixtures are used in most road paving, because there are certain disadvantages: the construction process is complicated, highly dependent on temperature, the use of mixture is greatly affected by the season, and the effective construction time is short. The secondary aging phenomenon will occur during the paving process, which will affect the performance of asphalt, and it will also be accompanied by high energy consumption and environmental pollution throughout the process
Therefore, hot mix and warm mix asphalt mixtures cannot meet the requirements of timely and rapid repair of asphalt pavement potholes
[0004] Although some researchers have proposed to use refrigerants to modify asphalt mixtures, there are many kinds of additives used in modification, and the content of refrigerants used for modification is small, and refrigerants are generally organic solvents, which are volatile. Low construction performance and poor storage

Method used

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  • Cold paved modified asphalt mixture and its preparation method and application
  • Cold paved modified asphalt mixture and its preparation method and application
  • Cold paved modified asphalt mixture and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 4

[0025] The cold-paved modified asphalt mixture proposed in Examples 1 to 4 includes cold-paving solvent, petroleum resin, road petroleum asphalt and mineral materials; cold-paving solvent includes viscosity reducer, catalytic cracking rubber powder and organic solvent; Mineral material is composed of coarse aggregate, fine aggregate and mineral powder.

[0026] In Examples 1 to 4, the specific parts by weight are shown in Table 1.

[0027] Table 1 The number of components of the cold-paved modified asphalt mixture of Examples 1 to 4

[0028]

[0029]

[0030] In the above-mentioned embodiment 1 to embodiment 4, 6 kinds of materials are included, and each material is as follows:

[0031] 1) The viscosity reducer is Sasobit REDUX; the performance index of Sasobit REDUX is the freezing point of 72-83°C and the permeability of 16-30dmm at 25°C.

[0032] 2) The petroleum resin is C5 hydrogenated petroleum resin. Its technical properties are shown in Table 2.

[0033] Tabl...

Embodiment 5

[0051] In this example, the raw material ratio provided in Example 1 is used to prepare the cold-paved modified asphalt mixture. Specifically, 0.394 parts of viscosity reducer, 1.313 parts of petroleum resin, 2.625 parts of catalytic cracking rubber powder, 7.876 parts of organic solvent, 26.254 parts of road petroleum asphalt, and 961.538 parts of mineral materials.

[0052] In this embodiment, the weight of the mineral powder is 3% of the weight of the mineral material.

[0053] In the present embodiment, the preparation method of cold-paved modified asphalt mixture comprises the following steps:

[0054] 1) When the temperature of the road petroleum asphalt reaches about 175°C, the catalytic cracking rubber powder is added at a constant speed, and at the same time, when the temperature of the asphalt reaches 175°C, the timing is started, and the mixer is uniformly stirred for 75 minutes;

[0055] 2) When the stirring time reaches 75min, add the viscosity reducer until it i...

Embodiment 6

[0059] In this example, the raw material ratio provided in Example 2 was used to prepare the cold-paved modified asphalt mixture. Specifically, 0.441 parts of viscosity reducer, 1.470 parts of petroleum resin, 2.939 parts of catalytic cracking rubber powder, 8.818 parts of organic solvent, 29.394 parts of road petroleum asphalt, and 956.938 parts of mineral materials.

[0060] In this embodiment, the weight of the mineral powder is 5% of the weight of the mineral material.

[0061] In the present embodiment, the preparation method of cold-paved modified asphalt mixture comprises the following steps:

[0062] 1) When the temperature of the road petroleum asphalt reaches about 183°C, the catalytic cracking rubber powder is added at a constant speed, and at the same time, when the temperature of the asphalt reaches 183°C, the timing is started, and the mixer is uniformly stirred for 55 minutes;

[0063] 2) When the stirring time reaches 55min, add the viscosity reducer until it ...

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Abstract

The present invention relates to a cold paving type modified asphalt mixture and its preparation method and application, including cold paving solvent, petroleum resin, road petroleum asphalt and mineral materials; the cold paving solvent includes viscosity reducer, catalytic cracking rubber powder and organic solvent; The ore material is composed of coarse aggregate, fine aggregate and mineral powder; the weight part of viscosity reducer is 0.39-0.42 parts, the weight part of petroleum resin is 1.30-1.40 parts, and the weight part of catalytic cracking rubber powder is 2.61-2.94 parts 5.59-8.82 parts by weight of the organic solvent, 26.06-29.39 parts by weight of the road asphalt, and 956.94-961.82 parts by weight of the mineral material. The present invention reduces the amount of asphalt, increases the amount of organic solvents used, and reduces costs by adding a viscosity reducer and catalytically cracked rubber powder; at the same time, it realizes cold paving, improves construction workability, has long storage time, saves energy and protects the environment, and reduces road operation costs. , High crack resistance.

Description

technical field [0001] The invention belongs to the technical field of road construction materials, and relates to a cold-paved modified asphalt mixture and a preparation method and application thereof. Background technique [0002] During the use of asphalt pavement, due to vehicle load and environmental forces, potholes will inevitably appear. While reducing driving comfort and accelerating road damage, it virtually increases the conflict point of traffic flow. The existence of road conflict points will inevitably lead to an increase in the incidence of traffic accidents, especially when vehicles drive on roads at night, roads with heavy traffic, bridges and other unfavorable conditions, the incidence of traffic accidents will be higher, and the resulting accidents will be more serious. Therefore, there is an urgent need for an asphalt mixture for timely and effective repair of potholes in roads. [0003] Hot-mix and warm-mix asphalt mixtures are used in most road pavin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B14/28C04B24/00C04B18/22C04B20/00
CPCC04B26/26C04B40/0039C04B14/28C04B2111/0075C04B2201/50C04B24/26C04B24/00C04B2103/34C04B18/22C04B20/0076C04B20/008Y02W30/91
Inventor 李蕊谢杰王明
Owner CHANGAN UNIV