Warm mix asphalt additive and preparation method thereof

Abstract

The invention provides a warm mix asphalt additive which is prepared from the following raw materials in parts by weight: 15-20 parts of polyethylene wax, 15-20 parts of chlorinated paraffin-70, 30-50 parts of kieselguhr, 1-3 parts of stearamide and 1-4 parts of solid anti-striping agent. The invention further provides a method for preparing the warm mix asphalt additive. The method comprises the following steps of: both grinding the polyethylene wax and stearamide into micro-powder, and subsequently putting the chlorinated paraffin-70, kieselguhr, the solid anti-striping agent and the grinded polyethylene wax and stearamide into a high-speed ball mill to be milled so as to obtain the warm mix asphalt additive. By utilizing the warm mix asphalt additive, the mixing and compressing temperature of an asphalt mixing material can be decreased by more than 20 DEG C on the premise that the property of the asphalt mixing material is not affected, so that the warm mix asphalt additive can be widely applied to asphalt mixing material construction in areas of different climates.

Description

technical field [0001] The invention belongs to the technical field of road asphalt materials, and in particular relates to a warm-mix asphalt additive and a preparation method thereof. Background technique [0002] Since asphalt has been used in roads, the mature asphalt mixture is mainly hot mix asphalt mixture. However, hot mix asphalt mixture has high mixing temperature and paving temperature, high emission of harmful gases, and easy aging of asphalt mixture. Defects have caused many ecological and environmental problems. [0003] Warm mix asphalt mixture is a new material that is environmentally friendly and energy-saving. It has the same or even better road performance as the corresponding hot mix asphalt mixture, but it can be mixed and paved at a lower temperature, greatly reducing The energy consumption and soot emission in the production process are reduced, and the economic benefit and ecological value are significantly improved. [0004] As one of warm mix tech...

AI Technical Summary

Problems solved by technology

However, it is inevitable that some water will remain between the asphalt and aggregate interface during the production process, making the asphalt mixture potentially water-damaged

With the advantage of its own low melting point (about 100°C), organic additives can chemically change the viscosity-temperature curve of asphalt, thereby achieving the purpose of reducing the production temperature of asphalt mixture. often have a certain negative impact on the low temperature crack resistance of asphalt

At present, the domestically developed warm mix asphalt additive products are mainly organic and surface active, such as the published patent CN102093731A, patent CN102408602A, patent CN101899218A, patent CN101831187A, patent CN102795801A, patent CN102827484A, etc., domestically developed warm mix asphalt additive products Although they can basically achieve the cooling effect of similar foreign products and can successfully produce warm mix asphalt mixture, there are inevitably defects such as complex production process, high energy consumption, and reduced performance of asphalt mixture.

Existing warm mix asphalt additive products are not widely applicable to the paving of asphalt pavement in different climate regions

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