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Cold-mixed and cold-laid anion emulsified asphalt and preparation method and application thereof

An emulsified asphalt and anion technology, applied in the field of building materials, can solve the problems of insufficient bonding, asphalt peeling, unable to exert the properties of emulsified asphalt, etc., and achieve the effect of reducing pollution and saving energy.

Inactive Publication Date: 2019-05-31
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE +1
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Problems solved by technology

[0003] However, there are many shortcomings in the common types of emulsified asphalt at present, such as unstable storage, which leads to early demulsification and delamination of emulsified asphalt, so that the unique properties of emulsified asphalt cannot be exerted; Insufficient, causing the bitumen to peel off the aggregate prematurely and thus not reach the useful life
Therefore, there is still a certain gap compared with the existing hot-mix asphalt pavement technology, which cannot adapt to the traffic level of our country. As a result, the current traditional cold-mix asphalt pavement technology can only be applied to low-grade roads. Therefore, research on high-performance cold-mix cold-paved asphalt material imminent

Method used

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  • Cold-mixed and cold-laid anion emulsified asphalt and preparation method and application thereof
  • Cold-mixed and cold-laid anion emulsified asphalt and preparation method and application thereof
  • Cold-mixed and cold-laid anion emulsified asphalt and preparation method and application thereof

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Embodiment 1

[0058] The examples given are for better description of the content of the present invention, but the content of the present invention is not limited to the examples given. Therefore, non-essential improvements and adjustments to the implementation by those skilled in the art based on the content of the invention above still fall within the protection scope of the present invention.

[0059] A cold-mixed cold-paved anionic emulsified asphalt and a preparation method thereof, comprising the steps of:

[0060] Step 1: Prepare the emulsifier and water according to a certain ratio, stir well, adjust the pH to 11-13, and add an appropriate amount of stabilizer. The emulsifier used is A3T1 anionic slow-cracking emulsifier with a dosage of 3.5%. The dosage of stabilizer is 0.1%;

[0061] Step 2: Heat the prepared emulsion to 60°C, and at the same time start the shearing instrument for shearing, the speed of the shearing instrument is controlled at 2000r / min, and the shearing time is...

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Abstract

The invention relates to cold-mixed and cold-laid anion emulsified asphalt and a preparation method and application thereof. The cold-mixed and cold-laid anion emulsified asphalt comprises mineral aggregate, cement, mixing water and modified emulsified asphalt and is characterized in that the optimal asphalt-aggregate ratio of the emulsified asphalt mixture is 4-5%, the use amount of the mixing water is 1-2% of the mass of the mineral aggregate and the cement, and the use amount of the cement is 1-2% of the total mass of the mineral aggregate and the cement; the modified emulsified asphalt isprepared by emulsified asphalt and modifier waterborne epoxy resin, the use amount of the modifier waterborne epoxy resin is 10-15% of the mass of the emulsified asphalt, and the modifier waterborne epoxy resin is prepared by waterborne epoxy resin and a curing agent; the emulsified asphalt is prepared by an emulsifier, water, a stabilizer solution and matrix asphalt, and the use amount of the emulsifier is 1.2-4.0% of the mass of the emulsified asphalt. The dynamic stability, residual stability and maximum flexural-tensile failure strain of the cold-mixed and cold-laid anion emulsified asphalt meet Technical Specification for Construction of Highway Asphalt Pavements (JTG F40-2004) and corresponding engineering technical requirements.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a cold-mixed cold-paved anionic emulsified asphalt and a preparation method and application thereof. Background technique [0002] Compared with hot-mix and hot-pave asphalt pavement and warm-mix and warm-pave asphalt pavement, cold-mix and cold-pave asphalt pavement technology is the most energy-saving and environmentally friendly technology. Based on the characteristics of cold-mix and cold-pave asphalt materials, it can be produced and constructed at room temperature Compared with the traditional asphalt mixture, it reduces the energy consumption in the heating process of aggregate and asphalt, so as to achieve low energy consumption, low emission and light pollution in road construction. [0003] However, there are many shortcomings in the common types of emulsified asphalt at present, such as unstable storage, which leads to early demulsification and delamination of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 季节李辉索智贾晓鹏张艳君
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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