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A self-repairing asphalt based on UV curing behavior and its preparation method

A technology of self-healing and self-healing microcapsules, which is applied to building components, building insulation materials, buildings, etc., to achieve the effect of simple formula, obvious effect and high efficiency

Active Publication Date: 2020-03-10
SHANXI PROVINCIAL RES INST OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are relatively few studies on the application of UV curing technology to asphalt.

Method used

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  • A self-repairing asphalt based on UV curing behavior and its preparation method
  • A self-repairing asphalt based on UV curing behavior and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 100g of 70# petroleum asphalt, heat to 160°C, add 0.5g microcapsules (wall material is C5 petroleum resin, core material is epoxy acrylic resin, wall material: core material = 2:1, light shielding agent is phthalocyanine blue, the photoinitiator is 2,4,6-trimethylbenzoyl phosphonic acid ethyl ester), high-shear disperser stirred for 5min, the stirring speed was 1000r / min, cooled to room temperature to obtain asphalt with self-healing function . The ductile self-healing test of asphalt was used to analyze the effect of adding microcapsules on asphalt self-healing performance. The procedure of asphalt ductility self-healing test is as follows: Conduct ductility test according to T 0605-2011 in JTG E20-2011 of "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering", prepare asphalt ductility samples, and cut the middle part of the test piece with a blade. Open a section and cause damage. The undamaged depth is the thickness of two 1 yuan coins at ...

Embodiment 2

[0021] Weigh 100g of 70# petroleum asphalt, heat to 160°C, add 0.5g microcapsules (wall material is C5 petroleum resin, core material is epoxy acrylic resin, wall material: core material = 2:1, light shielding agent is phthalocyanine blue, the photoinitiator is 2,4,6-trimethylbenzoyl phosphonic acid ethyl ester), high-shear disperser stirred for 5min, the stirring speed was 1000r / min, cooled to room temperature to obtain asphalt with self-healing function . The ductile self-healing test of asphalt was used to analyze the effect of adding microcapsules on asphalt self-healing performance. Under ultraviolet light irradiation, the repair time is 0.5 hours, the results are as follows:

[0022] When no microcapsules are added, the ductility L at 10°C after repair a 4cm, repair rate L b / L a =16%; after adding microcapsules 0.5%, L b is 9cm, and the recovery rate is 36%, obviously higher than that of the unadded sample, and higher than the recovery rate in Example 1.

Embodiment 3

[0024] Weigh 100g of 70# petroleum asphalt, heat to 160°C, add 0.5g of microcapsules (wall material is urea-formaldehyde resin, core material is polyurethane acrylate, wall material: core material = 2:1, light shielding agent is phthalocyanine green, The photoinitiator is 2,4,6-trimethylbenzoylphosphonic acid ethyl ester), stirred for 5 minutes with a high-shear disperser at a stirring rate of 1000 r / min, and cooled to room temperature to obtain asphalt with self-healing function. The ductile self-healing test of asphalt was used to analyze the effect of adding microcapsules on asphalt self-healing performance. The UV repair time is 0.5 hours, the results are as follows:

[0025] When no microcapsules are added, after repairing for 0.5 hours, the ductility L at 10°C after repairing a 3cm, repair rate L b / L a =12%; after adding microcapsules 0.5%, L b is 8cm, and the repair rate is 32%, which is higher than that of the sample without addition.

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Abstract

The invention belongs to the technical field of road engineering asphalt material, and particularly relates to UV (ultraviolet) curing behavior based self-repairing asphalt and a preparation method thereof. The self-repairing asphalt is consisted of petroleum asphalt and a self-repairing microcapsule, and the mass proportion of the petroleum asphalt to the self-repairing microcapsule is 100:0.1-10; the petroleum asphalt is one of 70# petroleum asphalt, 90# petroleum asphalt or modified petroleum asphalt which are stipulated in 'standard specification for construction and acceptance of highway asphalt pavement' JTG F40-2004; the self-repairing microcapsule is formed by a capsule wall and a capsule core and is coated with a UV screener from the outer side; the capsule wall is made of C5 petroleum resin, the capsule core is of a UV curing resin system, and the mass proportion of the C5 petroleum resin to the UV curing resin system is (1:3)-(3:1). Compared with the prior art, the UV curing behavior based self-repairing asphalt has the advantages of simple formula, high efficiency and obvious effect.

Description

technical field [0001] The invention belongs to the technical field of road engineering asphalt materials, and in particular relates to a self-repairing asphalt based on UV curing behavior and a preparation method thereof. Background technique [0002] Asphalt pavement, as the "interface" between road and traffic, has special significance in the whole pavement structure. During the long-term use of asphalt pavement, its structure has to experience the test of various complex environments, and some small cracks and local damage will inevitably occur. If these micro-damages cannot be controlled in time, these micro-cracks will be exposed to external loads. Under the action of cracking, it will affect the service life of the pavement structure, and it will destroy the structure of the entire road. Therefore, how to timely and effectively repair the cracks and damages in the pavement has become the main concern of road workers. Asphalt itself has a certain self-healing ability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L63/10C08L57/02C08L61/24C08L75/14C08K5/00
CPCC08L95/00C08L2205/03C08L2205/18C08L63/10C08L57/02C08K5/0091C08L61/24C08L75/14
Inventor 刘哲张帅胡国鹏刘鹏飞郭涛
Owner SHANXI PROVINCIAL RES INST OF COMM