Slow-cracking and fast-setting asphalt emulsifier for micro-surfacing and preparation method thereof

Abstract

The invention discloses a slow-cracking and fast-setting asphalt emulsifier for micro-surface and a preparation method thereof. The method for preparing an asphalt emulsifier comprises the following steps: 1) after the organic acid, the organic polyamine and the solvent are mixed and subjected to an amidation reaction, the cyclization reaction is carried out under vacuum conditions, and the solvent and water in the system are removed after the reaction is completed. 2) After the reaction system obtained in step 1) is cooled down, the ethanol solution of the graft modifier is subjected to an addition reaction with the intermediate obtained in step 1), and the asphalt emulsifier is obtained after the reaction is completed. The asphalt emulsifier has a wide range of preparation raw materials, a simple preparation method, mild reaction conditions, environmental friendliness, and easy industrial production. The asphalt emulsifier has good emulsification ability for different asphalts, and the prepared emulsified asphalt has good storage stability, uniform and fine particles, good adaptability to aggregates, and obvious slow cracking and fast setting effect. It can be used to prepare emulsified asphalt for micro-surface.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and relates to a slow-cracking and fast-setting asphalt emulsifier for micro-surface treatment and a preparation method thereof. Background technique [0002] Micro-surfacing is to use special mechanical equipment to mix polymer-modified emulsified asphalt, coarse and fine aggregates, fillers, water and additives according to the design ratio to form a slurry mixture, spread it on the original road surface, and open the traffic soon. Thin-layer structure with high anti-slip and durable properties. As an important branch of emulsified asphalt technology, micro-surfacing technology is used not only for asphalt pavement, but also for the overlay of cement concrete pavement in foreign countries. In my country, it is mostly used for asphalt pavement, cement concrete bridge deck, tunnel pavement, etc. It is considered to be one of the most effective and economical means to repair road rutting and ...

AI Technical Summary

Problems solved by technology

The emulsifier used for emulsified asphalt for micro-surfacing is required to be cationic emulsifier. Practice has proved that the emulsified asphalt prepared by cationic asphalt emulsifier has strong adsorption force on the surface of stone materials, good peeling resistance, fast forming speed and high early strength, but Due to the strong polarity of its hydrophilic group, the demulsification speed is fast, resulting in a short mixing time, and the micro-surface mixture is a cold-mixed cold-paved mixture, which is in a slurry state during construction. Considering Due to the ease of construction and the requirement of rapid open traffic, it is necessary to control the mixing time of emulsified asphalt and aggregate

[0004] At present, asphalt emulsifiers used for micro-surfaces generally have poor slow-cracking and fast-setting effects, poor adaptability to different asphalt and aggregates, difficulty in controlling the demulsification rate, cumbersome emulsifier preparation process, complicated formula, and the need to add a variety of additives, resulting in Its raw material sources are limited and its environmental friendliness is not good.