High-permeability prime coating emulsified asphalt and preparation method thereof

Abstract

The invention discloses high-permeability prime coating emulsified asphalt, which comprises the following components: asphalt and/or residual oil, diluent, emulsifier, water, stabilizer and cationic SBR rubber latex. The preparing process prepare the asphalt by adopting emulsification of two colloid mills which are connected in series, wherein all materials pass through a primary colloid mill; part of materials discharged by the primary colloid mill pass through a secondary colloid mill, and are mixed with materials which do not pass through the secondary colloid mill to prepare a final product. The prepared emulsified asphalt has good stability and high permeability, and can permeate a base layer with depth of between 5 and 10mm. The diluent is lubricant furfural refined extract oil, FCC slurry oil, fatty acid leftovers, decompression side line oil and other industrial byproducts, and has smaller volatility and lower price compared with gasoline, coal oil and diesel oil, so that the prepared high-permeability emulsified asphalt has low cost. Besides serving as priming oil, the emulsified asphalt can also be used in asphalt pavement cold regeneration, slurry seal and highway constructions of microsurfacing, dust diminisher, soil stabilization and lane and sidewalk sealant.

Description

technical field [0001] The invention relates to an emulsified asphalt and a preparation method thereof, in particular to a cheap and strong permeability permeable layer emulsified asphalt and a preparation method thereof. Background technique [0002] The permeable layer on the surface of the asphalt pavement base plays the role of consolidation, stability, waterproofing, and connection of various road structural layers, and is crucial to the quality and life of the pavement. The depth of penetration of the oil through the layer determines whether the asphalt surface layer can be well combined with the non-asphalt material base. Commonly used penetration oils are coal tar, diluted asphalt and emulsified asphalt. Coal tar is highly permeable but toxic, and is basically used at home and abroad; diluted asphalt has good penetration, but the cost is high, and at the same time, because too much oil content will cause pollution to the environment, there are hidden dangers in the ...

AI Technical Summary

Problems solved by technology

At present, the existing emulsified asphalt for penetration layer generally has the problem of poor permeability, mainly because: 1. The high viscosity of emulsified asphalt hinders the penetration of asphalt droplets; 2. The emulsified asphalt demulsification speed is fast, and the emulsified asphalt has not fully penetrated. When it goes down, it breaks the emulsion and forms an oil skin on the surface of the base layer that can be stuck by the truck and paver

Although adding diluents such as gasoline and kerosene to emulsified asphalt can increase the permeability of emulsified asphalt, it will bring about a significant increase in cost and environmental pollution.

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