High-viscosity and high-elasticity modified asphalt for steel bridge deck and preparation method thereof

Abstract

The invention discloses a high-viscosity and high-elasticity modified asphalt for steel bridge decks and a preparation method thereof. 4~7 parts, 0.5~1.5 parts of tackifier, 0.1~0.4 parts of stabilizer, 0.5~1.0 parts of stabilizer and auxiliary. The low-volume modifier + amide auxiliary agent system of the present invention can improve the high and low temperature performance of asphalt and reduce the production cost of modified asphalt. Amide additives can improve the high-temperature performance of modified asphalt, and the improvement range is greater than that of polymer modifiers with the same amount. With the addition of light components of aromatic components in furfural extracted oil, the modifier can be more uniform Dispersed in the base asphalt, fully swells, and exerts the modification effect; uses the condensate sodium salt to modify the modified asphalt synergistically, cooperates with polymer modifiers and stabilizers, and does not affect the basic indicators of the modified asphalt Under this condition, the production and development time of modified asphalt is shortened, the production cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a modified asphalt for a steel bridge deck, in particular to a high-viscosity and high-elasticity modified asphalt for a steel bridge deck and a preparation method thereof. Background technique [0002] With the maturity of high-viscosity and high-elasticity modified asphalt technology, in order to improve its high-low temperature performance, rubber powder or TPS high-viscosity modifier is used to modify asphalt, which can make the asphalt have higher high-temperature performance and 60°C viscosity , The low-temperature performance is also improved; or the use of resin tackifiers makes the asphalt have higher high-temperature performance and bonding performance; or the use of synthetic lipid plasticizers makes the asphalt have higher low-temperature ductility. However, whether rubber modification or other high and low temperature additives are used for modification, about 6-9% or even higher amount of modifier is required to b...

AI Technical Summary

Problems solved by technology

However, whether rubber modification or other high and low temperature additives are used for modification, about 6-9% or even higher amount of modifier is required to be blended with the matching viscosity reducer, otherwise the viscosity of the bitumen will be relatively low. Large, not easy to mix, pave and roll

However, although high-volume elastomer modifiers have high performance in the production process, the high-volume modifier will inevitably bring about high costs for modified asphalt, and segregation is prone to occur during the production process, requiring longer The mixing time ensures that the modifiers and additives in the modified asphalt are uniformly dispersed. The production of asphalt requires high energy consumption and a long cycle. Generally, it takes 6 to 8 hours for the mixing development time index to be stable. Some additives such as rubber powder will be brought into production. Higher pungent smell, polluting the environment, resulting in higher production costs

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