Micro-surfacing slow cracking and rapid setting asphalt emulsifier and preparation method thereof

Abstract

The invention discloses a micro-surfacing slow cracking and rapid setting asphalt emulsifier and a preparation method thereof. The asphalt emulsifier preparation method comprises the following steps: (1) uniformly mixing organic acid, organic polyamine and a solvent for amidation, carrying out cyclization under vacuum condition, removing the water and solvent in the system after reaction to obtain an intermediate; and (2) after the reaction system in the step (1) is cooled, carrying out addition reaction with an ethanol solution of a graft modifier and the intermediate obtained in the step (1) to obtain the asphalt emulsifier after reaction. The asphalt emulsifier is wide in preparation raw material source, simple in preparation method, moderate in reaction condition, environment-friendly and favorable for industrial production; the asphalt emulsifier has a good emulsification performance for different asphalt; the prepared emulsified asphalt is good in storage stability, uniform and fine in particles, good in adaptability with aggregate material and remarkable in slow cracking and rapid setting effect; and the emulsified asphalt can be used for preparing micro-surfacing emulsified asphalt.

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.