Polyurethane micro-surfacing seal coat mixture and preparation method and application thereof

A micro-surface and compound technology, applied in the field of polyurethane micro-surface sealing compound and its preparation, can solve the problems of inability to meet the road maintenance business, easy to flow at high temperature, easy to crack at low temperature, etc., to achieve the best impermeability and prevent aging. effect with loose, high flexural strength

Inactive Publication Date: 2020-06-05
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the traditional slurry seals are modified emulsified asphalt, but the characteristics of the asphalt material itself determine that it has the defects of easy flow at high temperature and easy cracking at low temperature. Therefore, the traditional slurry seal is increasingly unable to meet the needs of road maintenance. Development needs, it is urgent to find a material with good high temperature stability, low temperature crack resistance and fatigue resistance

Method used

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  • Polyurethane micro-surfacing seal coat mixture and preparation method and application thereof
  • Polyurethane micro-surfacing seal coat mixture and preparation method and application thereof
  • Polyurethane micro-surfacing seal coat mixture and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0069] The preparation method of the polyurethane micro-surface sealing layer mixture of the present invention, taking the MS-3 type slurry mixture as an example, includes the following materials by weight: aggregate: 90 parts by weight; filler: 10 parts by weight; polyurethane: 10 parts by weight parts by weight; catalyst: 0.2 parts by weight.

[0070] Above-mentioned aggregate is made up of the raw material of following mass parts ratio:

[0071] Coarse aggregate: 54 parts by weight;

[0072] Fine aggregate: 36 parts by weight.

[0073] The performance test results of the above aggregates are shown in Table 2:

[0074] Table 2 Aggregate Performance Test Results

[0075]

[0076] The above-mentioned coarse aggregate is basalt, the fine aggregate is limestone, the particle size of the coarse aggregate is 5-10mm, and the particle size of the fine aggregate is 0-5mm; Relevant requirements in JTG F40); Polyurethane is a polyether polymer, its soft segment is polyether poly...

Embodiment 2

[0081] The preparation method of the high-performance polyurethane micro-surface sealing layer mixture of the present invention is the same as in Example 1, and the difference is that, taking the MS-3 type slurry mixture as an example, the material comprising the following parts by weight:

[0082] Aggregate: 92 parts by weight;

[0083] Filler: 8 parts by weight;

[0084] Polyurethane: 9 parts by weight;

[0085] Catalyst: 0.18 parts by weight.

[0086] Above-mentioned aggregate is made up of the raw material of following mass parts proportioning:

[0087] Coarse aggregate: 46 parts by weight;

[0088] Fine aggregate: 46 parts by weight.

Embodiment 3

[0090] The preparation method of the high-performance polyurethane micro-surface sealing layer mixture of the present invention is the same as in Example 1, and the difference is that, taking the MS-3 type slurry mixture as an example, the material comprising the following parts by weight:

[0091] Aggregate: 94 parts by weight;

[0092] Filler: 6 parts by weight;

[0093] Polyurethane: 8 parts by weight;

[0094] Catalyst: 0.16 parts by weight.

[0095] Above-mentioned aggregate is made up of the raw material of following mass parts proportioning:

[0096] Coarse aggregate: 37 parts by weight;

[0097] Fine aggregate: 57 parts by weight.

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Abstract

The invention provides a polyurethane micro-surfacing seal coat mixture and a preparation method thereof. The polyurethane micro-surfacing seal coat mixture is prepared from the following raw materials in parts by weight: 80-100 parts of an aggregate, 0-20 parts of a filler, 8-15 parts of a polyurethane adhesive and 0.08-0.3 part of a catalyst. The polyurethane micro-surfacing seal coat mixture provided by the invention has good pavement performances and durability. According to the invention, a thin slurry mixture formed by mixing the polyurethane, aggregate, filler and the like according toa designed ratio is paved on a thin layer formed by an original pavement by using mechanical equipment, the concrete has the advantages of favorable durability, high compression resistance, high breaking strength, high strength formation speed, favorable stability, excellent low-temperature crack resistance, excellent fatigue resistance, environment friendliness, energy saving, longer constructiontime and the like, and can be cured at normal temperature.

Description

technical field [0001] The invention belongs to the technical field of road maintenance, and relates to a polyurethane micro-surface sealing layer mixture and a preparation method and application thereof. Background technique [0002] Micro-surfacing technology is an important part of pavement preventive maintenance. It has outstanding advantages such as convenient construction, economical and environmental protection, safety and high efficiency. By adding a thin layer of micro-surfacing to the original pavement, the pavement performance can be quickly restored and the anti-skid performance of the pavement can be improved. , prevent road surface water seepage, delay pavement aging, etc. Most of the traditional slurry seals are modified emulsified asphalt, but the characteristics of the asphalt material itself determine that it has the defects of easy flow at high temperature and easy cracking at low temperature. Therefore, the traditional slurry seal is increasingly unable t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/16C04B28/00
CPCC04B26/16C04B28/00C04B2111/0075C04B2201/50C04B14/14C04B14/28C04B18/12C04B2103/10C04B22/064C04B24/282
Inventor 徐世法许萌蔡硕果谢永清戚佳飞王少朋陈鑫超彭庚范立嘉李佳昊冯卡刘鹏杨扬贾川
Owner BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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