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Asphalt pavement pit slot repairing capsules, and preparation and construction method thereof

A technology for preparing asphalt pavement and capsules, which is applied to roads, roads, on-site coagulating pavements, etc., can solve the problems of poor storage stability and high energy consumption of hot-mix asphalt mixture, achieve stable properties, improve environmental protection index, The effect of increasing storage

Active Publication Date: 2020-01-07
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of asphalt pavement pothole repair capsule and its preparation and construction method to solve the key problems of high energy consumption and poor storage stability of hot-mix asphalt mixture in transportation, and to provide a capsule that can be used in Asphalt pavement pothole repair capsules stored stably at room temperature and preparation and construction methods thereof

Method used

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  • Asphalt pavement pit slot repairing capsules, and preparation and construction method thereof
  • Asphalt pavement pit slot repairing capsules, and preparation and construction method thereof
  • Asphalt pavement pit slot repairing capsules, and preparation and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] A method for preparing asphalt pavement pothole repair capsules, characterized in that it comprises the following steps:

[0041] S1: Add the heating medium to the road asphalt and mix at 170°C-180°C for two minutes to ensure uniform mixing;

[0042]S2: Put the mixture obtained in step 1 into a tray and cool it at -15°C--5°C;

[0043] S3: Preliminarily break the cooled mixture in step 2 by hand, and then break it into irregular pieces of different sizes with a hammer, and store them in a container at 2°C-10°C to form the core of the capsule;

[0044] S4: Mix alginate and distilled water, and stir with a stirring device at 400-500 rpm for 10-12 minutes to produce a uniform emulsion; at the same time, mix calcium chloride with distilled water to prepare calcium chloride solution

[0045] S5: The core is first added to the alginate emulsion obtained in step 4, and then added to the calcium chloride solution to generate an ionic gel of alginate on the surface of the core. ...

Embodiment 1

[0061] In order to compare the pavement and mechanical properties of asphalt pavement pothole repair capsules and ordinary asphalt mixtures for pothole repair. A comparative test was carried out on three kinds of asphalt mixtures. The test contents are tensile test, shear test and high temperature rutting test. Among the three groups of experiments, the first group is a test piece made of asphalt pavement pothole repair capsule; the second group is a HMA2 type test piece, the raw material is asphalt content of 8%, and the maximum nominal particle size of the aggregate used is 2mm; The three groups are HMA10 specimens, the raw material is asphalt content of 5%, and the maximum nominal particle size of the aggregate used is 10mm. The test pieces are all made in accordance with JTGE20-2011 "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering", and the rest of the experimental conditions are the same. image 3 A schematic diagram of a typical gradation of a ...

Embodiment 2

[0066] The materials and related tests of this embodiment are the same as those in Example 1.

[0067] 10% road petroleum asphalt, 10% steel wool, 35% alginate-calcium chloride polymer, 45% aggregate.

[0068] The pit repair capsule prepared by the method can be used for repairing pits of general size.

[0069] The asphalt pavement pothole repair capsules prepared by this method were used to make corresponding test pieces, and relevant evaluation tests were carried out. The test showed that although the high temperature rutting resistance of the test pieces prepared by the asphalt pavement pothole repair capsules was slightly worse than that of HMA2 and HMA10 type test pieces, But its tensile strength and shear strength are significantly better than HMA2 and HMA10 type specimens. It shows that the pothole repair capsule has good road use and mechanical properties.

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Abstract

The invention discloses asphalt pavement pit slot repairing capsules and a preparation and construction method thereof. The asphalt pavement pit slot repairing capsules are obtained by taking a material which is easy to crack at high temperature as a shell, and a mixture of asphalt and a heating medium as a core, and wrapping with an aggregate; the raw materials comprise in percentage by mass: 7%-12% of road petroleum asphalt, 7%-12% of the heating medium, 15%-40% of alginate-calcium chloride polymer and 40%-60% of the aggregate. An obtained asphalt mixture is encapsulated and transported in bagged forms, so that the energy consumption of the hot-mixed asphalt mixture in the transportation process is reduced, and meanwhile, the problem of poor storage stability of the hot-mixed asphalt mixture is effectively solved. Besides, by means of the construction method for conducting microwave or electromagnetic heating repairing on pit slots in asphalt concrete pavements through the repairingcapsules in combination with induction heating technology, on the premise that the pavement and mechanical properties of the asphalt concrete pavement are not reduced, rapid repair and preventive maintenance of asphalt concrete pavements can be achieved, the economical efficiency is good, and the use performance of the asphalt pavements is improved.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement pothole repair, and in particular relates to an asphalt pavement pothole repair capsule and a preparation and construction method thereof. Background technique [0002] Potholes are common diseases of asphalt pavement. Potholes not only affect the overall appearance of the road, but also affect the normal traffic of the road, making the vehicle bumpy, affecting the driving speed and passenger comfort, and making the vehicle prone to mechanical damage. Faults and damages may even cause traffic accidents, and potholes on highways may even cause traffic accidents. Therefore, the potholes and damages on the road surface need to be repaired in time. [0003] At present, hot-mix asphalt mixture is commonly used for pothole repair. When hot-mix asphalt mixture is used to repair pits, it needs to be transported from the mixing station to the site. During the transportation process, the temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B40/00E01C7/18C04B111/72
CPCC04B26/26C04B40/0028C04B2111/0075C04B2111/723E01C7/187C04B24/38C04B22/124C04B14/02C04B14/48C04B14/28C04B14/14C04B14/048
Inventor 刘凯黄沐阳阚超豪李维汉金灿李淑琴徐先明许培欣陈方俊
Owner HEFEI UNIV OF TECH
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