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Bituminous mixture repair material for repairing pit holes of bituminous pavement as well as preparation method and application of bituminous mixture repair material

An asphalt mixture and asphalt pavement technology, applied in the field of pavement repair, can solve the problems of shallow heating depth, slow heating speed, low heating efficiency, etc., and achieve the effects of high bonding strength, rapid heating and high heating efficiency

Inactive Publication Date: 2019-06-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during construction, the temperature of the mixture around the pit is often not high enough, and it cannot be in good contact with the repair material, and the compaction is not sufficient, which inevitably produces weak joints. Under the action of dynamic water pressure and pump suction, new potholes will be formed soon, reducing the repair effect
In addition, in the process of using traditional electric heating and fuel heating, there are problems such as low heating efficiency, shallow heating depth, uneven heating, and slow heating rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Each material information used in the embodiment is as follows:

[0031] Mineral mixture: basalt crushed stone, limestone crushed stone and mineral powder, using OGFC-13 gradation (JTG-F40-2017 "Technical Specifications for Construction of Highway Asphalt Pavement"). The specific gradation composition is shown in Table 1:

[0032] Gradation composition of table 1 mineral mixture

[0033] Mesh size(mm) 16 13.2 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing rate(%) 100 93.8 75.6 27.7 19.3 16.2 12.2 9.2 7.5 6.0

[0034] Absorbing material: manganese zinc ferrite powder

[0035] Bitumen: high viscosity bitumen

[0036] Microwave heating equipment: microwave heating car

[0037] According to the "Experimental Regulations for Highway Engineering Aggregate" (JTG 42-2005) and "Experimental Regulations for Highway Engineering Asphalt and Asphalt Mixtures" (JTG / E20-2011), the mineral mixture is composed under the gradation in Table 1. The ...

Embodiment 2

[0049] Using basalt crushed stone and mineral powder as the mineral mixture, mix the mineral mixture, wave-absorbing material ferrite powder and asphalt at a mass ratio of 95:10:4, and stir at 165°C for 5 minutes to prepare the asphalt mixture repair material.

[0050] The process of repairing potholes on asphalt pavement with this repair material is as follows:

[0051] (1) Clean up the loose parts of the pit and the dust and sundries;

[0052] (2) brushing hot asphalt at the pit groove place gained in step (1);

[0053] (3) Use microwave heating equipment to preheat the pits obtained in step (2), the frequency is set to 2.45GHz, and the heating time is 5min;

[0054] (4) Put the repairing material into the pit, and use the roller for rolling, and the rolling temperature is controlled at 120°C;

[0055] (5) Carry out secondary microwave heating and secondary rolling to the pavement after preliminary rolling;

[0056] (6) Sweep off excess loose particles, and the repair is...

Embodiment 3

[0058] Limestone gravel and mineral powder are used as the mineral mixture, and the mineral mixture, wave-absorbing material ferrite powder and asphalt are mixed according to the mass ratio of 105:35:6, and stirred at 185°C for 4 minutes to prepare the asphalt mixture. repair material.

[0059] The process of repairing potholes on asphalt pavement with this repair material is as follows:

[0060] (1) Clean up the loose parts of the pit and the dust and sundries;

[0061] (2) brushing hot asphalt at the pit groove place gained in step (1);

[0062] (3) Use microwave heating equipment to preheat the pits obtained in step (2), the frequency is set to 2.45GHz, and the heating time is 5min;

[0063] (4) Put the repairing material into the pit, and use the roller for rolling, and the rolling temperature is controlled at 130°C;

[0064] (5) Carry out secondary microwave heating and secondary rolling to the pavement after preliminary rolling;

[0065] (6) Sweep off excess loose part...

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Abstract

The invention relates to a bituminous mixture repair material for repairing pit holes of a bituminous pavement as well as a preparation method and an application of the bituminous mixture repair material. The bituminous mixture repair material is prepared from components in parts by weight as follows: 95-105 parts of a mineral mixture, 20-23 parts of a wave-absorbing material and 4-6 parts of asphalt through mixing, stirring and heating. The repair material is used for repairing the pit holes of the bituminous pavement with a microwave repairing method. Compared with the prior art, the remarkable repairing effect can be realized through microwave heating, the bonding strength of a new material and an old material of the bituminous mixture is high after repairing, and secondary repairing isreduced to a great extent.

Description

technical field [0001] The invention relates to a pavement repair, in particular to an asphalt mixture repairing material for repairing potholes in asphalt pavement, a preparation method and application thereof. Background technique [0002] After a long period of service, there will be many diseases on the asphalt pavement, among which potholes are the most prominent. Cracks, looseness, peeling, subsidence and other reasons on the pavement may lead to the generation of potholes. If they are not repaired in time to stop their development, it will easily lead to extensive damage or even failure of the pavement. [0003] At present, the asphalt pavement pothole repair technology at home and abroad can be roughly divided into three types, cold material cold repair technology, hot material hot repair technology and hot material cold repair technology, among which the hot repair technology can better meet the quality requirements than the cold repair technology. [0004] The pri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 朱兴一叶方永
Owner TONGJI UNIV
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