Method for preparing penetrated emulsified asphalt

Abstract

The invention discloses a method for preparing penetrated emulsified asphalt. The method comprises the following steps of: (1) preparing aqueous solution by using an asphalt emulsifier and a stabilizer; (2) heating and melting asphalt and / or residual oil, and mixing the melt and a diluent; (3) adding cationic styrene butadiene rubber (SBR) latex to increase the adhesiveness of residues; and (4) emulsifying partial materials in the steps (1), (2) and (3) through a colloid mill with a larger mill clearance, filling obtained products into a finished product tank, turning down the mill clearance of the colloid mill, emulsifying the remaining part of the materials through the colloid mill, filling obtain products into the finished product tank, and uniformly mixing the obtained products and the previous products to obtain a final finished product. By the method, an emulsifying machine meets requirements on different mill clearances, equipment cost is saved compared with that of two colloidmills; and the permeability of the prepared high-permeable penetrated emulsified asphalt is improved, and the indexes such as ductility, sticky toughness and the like are improved at the same time. The penetrated emulsified asphalt can be used in the fields of penetrated oil, cold regeneration of asphalt pavements, slurry sealing and the like.

Description

technical field [0001] The invention relates to a method for preparing emulsified asphalt, in particular to a method for preparing emulsified asphalt with low cost and strong permeability. Background technique [0002] The permeable layer located on the surface of the asphalt pavement base layer plays the role of consolidation, stability, waterproof, and connection of various road structural layers, which is crucial to the quality and life of the pavement. The penetration depth of the penetrating layer oil determines whether the asphalt surface layer can be well combined with the non-asphalt material base. Commonly used penetrating layer oils include coal tar, diluted asphalt and emulsified asphalt. Coal tar is highly permeable but toxic, and is basically not used at home and abroad; diluted asphalt has good penetration, but the cost is high, and at the same time, it will pollute the environment due to too much oil content, and there are hidden dangers to the impact on 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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