Demulsifying slow breaking and quick setting modified emulsified asphalt by microwave heating and preparation method thereof

Abstract

The invention provides demulsifying slow breaking and quick setting modified emulsified asphalt by microwave heating and a preparation method thereof, adopts the emulsified asphalt emulsion by asphalt and a cation-anion-nonionic ternary compound emulsifier according to a certain ratio under an effect of high shear force, and solves the problem that conventional slow breaking and quick setting emulsified asphalt is uncontrollable in condensing speed and poor in adaptation of temperature and stone materials. The invention provides the emulsified asphalt which can be stably stored for a long time at normal temperature, is free from layered separation and demulsification, prevents demulsifying and condensing phenomena after being mixed with aggregates, and can demulsify and condense quickly when being heated to be at about 70 DEG C by microwaves, and the enough construction time is provided. The asphalt emulsion prepared by using the method is smooth and uniform in particles, and the enough mixing time in a construction application of slurry seal can be provided. According to the emulsified asphalt and the preparation method, the condensing speed can be controlled. The emulsified asphalt is generally adaptive to the stone materials, further the construction season is prolonged and the construction quality is improved.

Description

technical field [0001] The invention belongs to the technical field of traffic pavement materials, and in particular relates to slow-cracking and fast-setting modified emulsified asphalt which is demulsified by microwave heating and a preparation method thereof. Background technique [0002] Emulsified asphalt can be constructed at room temperature, save energy and asphalt, and can protect the environment and ensure the health of construction workers, which is in line with the national energy conservation and emission reduction policy. Therefore, its application has involved many fields. Emulsified asphalt slurry seal layer is an important direction of emulsified asphalt application. This technology is a new road maintenance technology imported from abroad in the middle of the 1980s. It has the advantages of good workability, fast construction, strong adhesion, and no pollution. The slow-cracking and fast-setting modified emulsified asphalt sealer technology gives full play...

AI Technical Summary

Problems solved by technology

However, the storage stability of the modified emulsified asphalt used in the slurry seal layer and micro-surfacing on the market is poor, resulting in the segregation of the asphalt emulsion, which leads to the difference in the ratio of asphalt to the pavement during construction; If the demulsification is too fast, the mixture may be scrapped, and if it is too slow, it will delay the opening time of traffic; the emulsified asphalt has great limitations on the compatibility of stone materials. The coagulation time of the emulsified asphalt cannot be controlled, and the emulsified asphalt and stone cannot be mixed evenly, which greatly affects the quality of the project and increases the cost of engineering manufacturing

[0003] The above problems have greatly hindered the popularization and application of slow-cracking and fast-setting modified emulsified asphalt in the slurry seal and micro-surfacing maintenance of expressways.

Images