Composite modified emulsified asphalt with excellent anti-stripping performance and preparation method thereof

Abstract

The invention belongs to the technical field of asphalt production and specifically relates to composite modified emulsified asphalt with excellent anti-stripping performance and a preparation methodthereof. The composite modified emulsified asphalt with excellent anti-stripping performance comprises the following raw materials in part by weight: 3.0-5.0 parts of a styrene-butadiene-styrene blockcopolymer, 60-75 parts of road petroleum asphalt, 0.5-1.5 parts of phosphogypsum, 0.5-1.0 part of a compatilizer, 35-45 parts of water, 1.5-3.0 parts of an emulsifying agent, 0.2-0.6 parts of a surfactant and 0.5 part of a stabilizing agent. The composite modified emulsified asphalt and the preparation method thereof provided by the invention have the benefits that the styrene-butadiene-styrene block copolymer and the phosphogypsum are compounded under the condition that methyl phenyl silicone oil is used as the compatilizer; the compounded modified asphalt is emulsified in liquid soap; the prepared composite modified emulsified asphalt has excellent anti-stripping performance and high-and-low temperature performance and has the characteristics of stable demulsification time, low eductionrate and uneasiness in adhesion to dust.

Description

technical field [0001] The invention belongs to the technical field of asphalt production, and in particular relates to a composite modified emulsified asphalt with excellent peeling resistance and a preparation method thereof. Background technique [0002] Under the increasingly severe overload and heavy load conditions and natural erosion, many high-grade highways are often prone to local looseness, potholes, surface peeling, cracking, etc. Rutting and other early diseases. On the other hand, the long-standing thinking of "emphasizing construction and ignoring maintenance" in road engineering construction in my country has resulted in a large proportion of the overall structure of the road not being seriously damaged, but the surface layer and the lower layer have not been repaired in time due to early diseases , its wear resistance, skid resistance, bearing capacity and other road performances have declined to varying degrees. The current repair maintenance project is hug...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the addition of specific asphalt modifiers and additives can improve the high and low temperature performance and solid-liquid compatibility of modified emulsified asphalt to a certain extent. However, even with the above-mentioned patented technology, the resistance of modified emulsified asphalt The peeling performance, the stability of the demulsification time, and the dispersion of the modifier in the system are still not guaranteed. Among them, the viscosity of the rubber powder modified asphalt itself is relatively high. As the temperature decreases during the emulsification process, its viscosity will further increase, resulting in The difficulty of emulsification increases, and it is prone to "sticking wheels" and too fast demulsification time during use

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