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Modification Method for Improving Shape Memory Performance of Emulsified Asphalt Used in Fog Sealing Coat

A technology of emulsified asphalt and modification, which is applied to building components, building insulation materials, buildings, etc. It can solve the problems of short maintenance time of pavement performance, easy aging and cracking of fog seal layer, lack of shape memory function, etc., and improve driving comfort and safety, promoting rationalization, and high scientific value

Active Publication Date: 2019-12-06
NANJING FORESTRY UNIV
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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 problems of the current asphalt pavement fog seal layer that is easy to age and crack, lacks shape memory function, cannot achieve self-healing, and maintains pavement performance for a short time, reduces the frequency of asphalt pavement maintenance, and improves pavement durability and service quality

Method used

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Embodiment Construction

[0016] The invention provides a modification method for improving the shape memory performance of the emulsified asphalt used in the mist seal layer. The specific implementation steps are as follows:

[0017] (1) Prepare a certain calculated amount of base asphalt and distilled water, respectively account for 0.3% of base asphalt SBS modifier, shape memory polyurethane modifier, anhydrous calcium chloride stabilizer, and account for 1.5% of base asphalt cationic emulsifier ;

[0018] (2) Heat distilled water to about 65°C, add anhydrous calcium chloride and emulsifier to it and stir thoroughly, then add hydrochloric acid to adjust the pH value to 1.5-2.5, and then continue stirring until the emulsifier is fully dissolved in the hot water containing hydrochloric acid water to make emulsifier soap;

[0019] (3) SBS and shape-memory polyurethane modifier are heated and melted, and composite modified latex is obtained through stirring, and the rotating speed of the high-speed she...

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Abstract

The invention provides a modification method for improving the shape memory performance of emulsified asphalt used in the fog seal layer, which belongs to the technical field of emulsified asphalt modification, and solves the problem that the current fog seal layer is prone to aging and cracking, lacks shape memory function, cannot realize self-healing and road surface performance Problems with short duration. The present invention firstly selects the asphalt sample, emulsifier and suitable shape memory polymer as the modifier, and makes the modifier into a latex; The modified emulsified asphalt was prepared by side emulsification method; secondly, the basic properties and shape memory performance of the modified emulsified asphalt were tested, and the formula of each component of the modified emulsified asphalt was optimized accordingly; finally, infrared spectroscopy and The scanning electron microscope analyzes the modified emulsified asphalt, and further optimizes the compounding scheme of the modified emulsified asphalt, so that the modified emulsified asphalt has better shape memory performance, enhances the self-healing performance of the fog seal material, and reduces the frequency of asphalt pavement maintenance.

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 highway 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 highway mileage. It can be seen that with the increase of highway mileage and the extension of traffic time, the workload of maintenance is increasing, and the cost of road 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 af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08L75/04C08K3/16
CPCC08K2003/162C08L95/00C08L2205/03C08L53/02C08L75/04C08K3/16
Inventor 许涛盛晓慧胡智慧王沫
Owner NANJING FORESTRY UNIV
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