Environment-friendly asphalt mixture warm mix modifier and preparation method thereof

Abstract

Belonging to the field of road materials, the invention in particular relates to an environment-friendly asphalt mixture warm mix modifier and a preparation method thereof. The modifier comprises the following components by weight: 100 parts of polyethylene wax, 20-40 parts of an organic lubricant, 10-30 parts of a lubricating surfactant, and 3-10 parts of a plasticizer. The preparation method includes: subjecting the polyethylene wax, the organic lubricant, the lubricating surfactant and the plasticizer to heating melting at 130-150DEG C, mixing them evenly, conducting extrusion by a screw extruder, carrying out cooling under normal temperature, and cutting the product into particles. The warm mix modifier provided by the invention is environment-friendly, energy-saving and emission reducing, can effectively lower the mixing temperature of the asphalt mixture by 20-40DEG C, enhance the adhesion performance between asphalt cement and aggregate, improve the anti-water damage performance of the warm mix asphalt mixture, and strengthen the rutting resistance and low temperature resistance of the warm mix asphalt mixture.

Description

technical field [0001] The invention belongs to the field of road materials, and in particular relates to an environment-friendly asphalt mixture warm-mix modifier and a preparation method thereof. The modifier can reduce the construction temperature of the hot-mix asphalt mixture. Background technique [0002] As a new type of asphalt mixture with high energy saving, low emission and environmental friendliness, warm mix asphalt mixture has been highly valued worldwide. Europe and the United States took the lead in carrying out prospective experimental research and formed a series of related patented technologies. Our country has also carried out some independent research and development work and developed some products. Compared with traditional hot-mix asphalt mixture, warm-mix asphalt mixture has lower mixing, paving and compaction temperature, which can significantly save fuel consumption, reduce harmful gas and smoke emissions, and effectively avoid the heat loss of as...

AI Technical Summary

Problems solved by technology

For asphalt foaming technology, it can improve the compaction performance of asphalt mixture, but it has no significant impact on its high temperature performance, water stability will be significantly reduced, water sensitivity will increase, and it is highly dependent on equipment; for surfactants , can improve the compaction performance of asphalt mixture, but its high temperature performance is not significantly improved, and additional equipment is needed when adding it; for organic viscosity reducers, it can improve the compaction performance of asphalt mixture, and the high temperature performance is significantly improved, but Asphalt mixtures have an increased risk of water damage and are prone to asphalt spalling

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