Cation emulsified asphalt for reducing corrosivity during production process and preparation method thereof

Abstract

The invention relates to cation emulsified asphalt for reducing the corrosivity during a production process and a preparation method thereof. The cation emulsified asphalt is prepared from the following raw materials in percentage by weight: 53 to 70 percent of asphalt, 0.8 to 3.0 percent of an emulsifier, 3.0 to 5.0 percent of a modifier, and the balance of water. The cation emulsified asphalt has the innovation point of a difunctional asphalt emulsifier required for producing the cation emulsified asphalt; a basic component is prepared from organic polyamine and organic acid which serve as raw materials; then the basic component, an acidic component and organic aldehyde with the molar ratio being 1: (1-1.3): (1-1.3) are reacted, so that the difunctional asphalt emulsifier is formed; themolecular structure of the difunctional asphalt emulsifier comprises a plurality of adsorption centers which can form an adsorption protective film and have emulsification and corrosion inhibition double functions. The emulsified asphalt has low corrosivity during a preparation process, and the hidden danger of corrosion during emulsification, storage and conveying process can be greatly reduced without a corrosion inhibitor. The emulsified asphalt is simple in production technology, wide in source of raw materials and excellent in performance, and can be applied to micro-surfacing and slurrysurfacing.

Description

technical field [0001] The invention relates to a cationic emulsified asphalt and a preparation method thereof, in particular to a cationic emulsified asphalt with low corrosion in the production process and a preparation method thereof. Background technique [0002] With the development of the highway industry, the rapid growth of highway construction and total highway mileage has played a very positive role in promoting the sustained and rapid growth of the national economy. From the point of view of road construction, the traditional road asphalt pavement construction process needs to heat asphalt and aggregates to 160~180 °C, the heating time is long, the temperature is high, the construction season is short, the energy consumption is high, and it is easy to produce toxic and harmful gases, which is harmful to the environment. create pollution. Using emulsified asphalt technology to pave the road only needs to heat the asphalt to 110~140°C. The emulsified asphalt produc...

AI Technical Summary

Problems solved by technology

However, the synthesis reaction of the emulsifier is complex, the steps are cumbersome, the reaction time is long, and the corrosion inhibition performance is general.

[Ma Ling, Li Lei, Kong Xiangjun, et al. Preparation of NE-6 cationic asphalt emulsifier and its corrosion inhibition behavior[J]. Petroleum Asphalt, 2011, 25(2):27-29] Naphthene The NE-6 cationic asphalt emulsifier was synthesized with acid and ethyleneamine as raw materials. The emulsifier has a certain corrosion inhibition function in aqueous solution, but the adsorption position of the emulsifier molecule on the metal surface is single, and the raw material naphthenic acid source and Unstable quality, difficult to guarantee the emulsification and corrosion inhibition performance of asphalt emulsifier products

[0012] To sum up, the production process of cationic emulsified asphalt is generally carried out in an acidic environment, and there is a huge hidden danger of corrosion. In the prior art, cationic asphalt emulsifiers with certain corrosion inhibition properties can be used in the production process, but there are emulsifiers The synthesis process is complex, the production cycle is long, the cost is high, the corrosion inhibition performance is general, the raw material source and quality are unstable, etc.