Modification method for improving shape memory performance of emulsified asphalt for fog sealing layer

Abstract

The invention provides a modification method for improving shape memory performance of emulsified asphalt for a fog sealing layer, belonging to the technical field of modifying emulsified asphalt and solving the problems that the current fog sealing layer is easy to age and crack, lacks off a shape memory function, cannot realize self-healing, and is short in maintenance time of pavement performance. The modification method comprises the following steps: firstly selecting asphalt test samples, an emulsifier, and a proper shape memory polymer as modifiers, and preparing the modifiers into latex; then primarily selecting the addition amount of all components of the modified emulsified asphalt, and preparing the modified emulsified asphalt by adopting emulsification while modification; secondly, testing the basic performance and shape memory performance of the prepared modified emulsified asphalt, and optimizing the formula of all the components in the modified emulsified asphalt on this basis; and finally, analyzing the modified emulsified asphalt by adopting an infrared spectroscopy and scanning electron microscope, and further optimizing the compounding scheme of the modified emulsified asphalt, so that the modified emulsified asphalt has better shape memory performance, the self-healing performance of materials of the fog sealing layer can be enhanced, and the maintenance frequency of an asphalt pavement can be reduced.

Description

technical field [0001] The invention relates to a modification method for improving the shape memory performance of emulsified asphalt used for a mist seal layer, and belongs to the technical field of emulsified asphalt modification. Background technique [0002] In recent years, with the rapid development of my country's economy, the total road mileage in my country has reached 4.7 million kilometers by the end of 2016, and the road maintenance mileage is 4.59 million kilometers, accounting for 97.7% of the total road mileage. It can be seen that with the increase of highway mileage and the extension of traffic time, the maintenance workload is increasing, and the cost of highway maintenance and repair is gradually increasing. In addition, after the completion of many highways in recent years, due to the rapid growth of traffic volume, large-scale vehicles, serious overloading, and channelization of driving, many asphalt pavements have suffered early damage shortly after th...

AI Technical Summary

Problems solved by technology

This method starts from the performance requirements that the emulsified asphalt needs to meet, selects the appropriate emulsifier, modifier and various additives, and then prepares the modified emulsified asphalt with shape memory function through the process of modifying and emulsifying. Solve the current problems of asphalt pavement fog seal layer that is prone to aging and cracking, lacks shape memory function, cannot achieve self-healing, and pavement performance maintenance time is short, reduces the frequency of asphalt pavement maintenance, and improves pavement durability and service quality