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Modified asphalt mastic resin used for panel sealing layer, and preparation and application methods thereof

A technology of modified asphalt and mastic, which is applied in the field of water conservancy and hydropower engineering, can solve problems such as easy aging and cracking, poor construction conditions, and poor low-temperature performance, so as to improve the ability to resist low-temperature cracking, avoid high-temperature flow, and improve anti-corrosion aging effect

Active Publication Date: 2013-01-16
POWERCHINA BEIJING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blending asphalt improves thermal stability by increasing the softening point, but at the same time the brittle point increases, the asphalt becomes brittle, prone to aging and cracking, and the low-temperature performance deteriorates; emulsified asphalt construction is more convenient, but it can improve anti-seepage performance, delay aging, Poor protection from freezing damage; use rubber powder to improve heat resistance, low temperature resistance and adaptability to deformation; if it is waste rubber powder, desulfurization and regeneration are required to achieve the desired effect; adding asbestos can improve heat resistance and crack resistance , but the construction conditions are poor and do not meet environmental protection requirements; if asbestos is replaced by plant fiber (lignin fiber) to improve heat resistance and crack resistance, although it is environmentally friendly, the construction performance and deformation performance are not ideal

Method used

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  • Modified asphalt mastic resin used for panel sealing layer, and preparation and application methods thereof
  • Modified asphalt mastic resin used for panel sealing layer, and preparation and application methods thereof
  • Modified asphalt mastic resin used for panel sealing layer, and preparation and application methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The test results of the modified asphalt in Example 1 are shown in Table 2, and the test results of the mineral powder technical indicators used are shown in Table 3. After the raw materials are weighed, the modified asphalt matrix is ​​dehydrated and heated to 160°C, and the mineral powder is heated to 100°C. After drying at ℃, it was added in proportion to the heated modified asphalt and mixed evenly to prepare the asphalt mastic of Example 1. The performance test indicators are shown in Table 4.

[0038] As can be seen from Table 4, the asphalt mastic sample prepared in Example 1 has good high-temperature flow resistance and low-temperature freeze-crack resistance.

[0039] Modified asphalt technical index used in the embodiment 1 of table 2

[0040]

[0041] The ore powder technical index used in the embodiment 1 of table 3

[0042]

[0043] The asphalt mastic performance test index used in the embodiment 1 of table 4

[0044]

Embodiment 2

[0046] Embodiment 2 and embodiment 3 are two examples of the same modified asphalt matrix, the same mineral powder, and different proportions. The test results of modified asphalt are shown in Table 5, and the test results of the mineral powder technical indicators used are shown in Table 3. The raw materials are called After measuring well, dehydrate the modified asphalt matrix and heat it to 160°C, heat the mineral powder to 100°C and dry it, then add it in proportion to the heated modified asphalt and mix evenly to prepare Example 2 and Example 3 Asphalt mastic, its performance test indicators are shown in Table 6.

[0047] It can be seen from Table 6 that the samples of asphalt mastic prepared in Example 2 and Example 3 have good high-temperature flow resistance and low-temperature freeze-crack resistance.

[0048] Modified asphalt technical indicators used in table 5 embodiment 2, embodiment 3

[0049]

[0050] Performance test index of asphalt mastic in table 6 embod...

Embodiment 4

[0053] The asphalt technical indicators in Example 4 are shown in Table 2, and the test results of mineral powder technical indicators are shown in Table 7. After the raw materials are weighed, the modified asphalt matrix is ​​dehydrated and heated to 160°C, and the mineral powder is heated to 100°C for drying. Then add the heated modified asphalt in proportion and mix evenly to prepare the asphalt mastic. The performance test index of the asphalt mastic obtained in Example 4 is shown in Table 8.

[0054] It can be seen from Table 8 that the asphalt mastic sample prepared in Example 4 has good high-temperature flow resistance and low-temperature freeze-crack resistance.

[0055] The mineral powder technical index that table 7 embodiment 4 uses

[0056]

[0057] Table 8 Example 4 Asphalt mastic performance test index

[0058]

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Abstract

The invention discloses a modified asphalt mastic resin applied in the field of water conservancy and hydropower project, and provides a preparation method and an application method of the modified asphalt mastic resin. The modified asphalt mastic resin comprises modified asphalt used as a matrix and ground alkaline rock mineral powder as filler, and the addition amount of the filler is 40-70%. The modified asphalt mastic resin is prepared by separately heating the modified asphalt matrix and the mineral powder and then uniformly mixing. When in use, the modified asphalt mastic resin is heated to 180-200 DEG C, simultaneously the surface of asphalt concrete for construction is cleaned, and then the modified asphalt mastic is brushed on the surface. The modified asphalt mastic resin has greatly improved anti-aging and anti-high-temperature slope flowing capabilities and low-temperature cracking resistance, and good adhesion with impermeable asphalt concrete under frost action. According to the construction method provided by the invention, the modified asphalt mastic resin can be brushed easily and evenly with few bubbles, convexes, needle holes and other defects.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a modified asphalt mastic used for sealing layers of hydraulic asphalt concrete panels. The invention also provides a preparation and application method of the modified asphalt mastic. Background technique [0002] The anti-seepage project of hydraulic asphalt concrete began in the early 1930s and has been used in some reservoirs at home and abroad, especially when the reservoir of a pumped storage power station adopts anti-seepage of the entire reservoir basin. In my country, hydraulic asphalt concrete began to be used in anti-seepage projects of earth-rock dams in the 1970s. Before the 1990s, more than 30 asphalt concrete anti-seepage panels and more than 10 asphalt concrete core walls of earth-rock dams were built. However, due to poor asphalt performance and various economic and technical reasons, the asphalt concrete panel project after completion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
Inventor 张亚丽吕明治李冰齐俊修李瑜霞李振忠张向前
Owner POWERCHINA BEIJING ENG
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