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

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...

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