Rapid mending agent for microscopic checks of airport pavement and preparation thereof

A technology of repairing agent and pavement, applied in the field of chemical building materials, can solve the problems that it is difficult to meet the fine crack repair process of airport pavement, low bonding strength, large shrinkage deformation, etc., to improve anti-aging performance and short curing time , reduce the effect of volume shrinkage

Inactive Publication Date: 2008-08-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing repair materials may have disadvantages such as low bonding strength with old concrete, long curing time, and are only suitable for repairing large-area damage, or have shortcomings such as large shrinkage deformation, high viscosity, and high brittleness, which are difficult to meet the requirements of the airport pavement. The crack repair process and the requirements for rapid release after repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Component 1: methyl methacrylate prepolymer, 100 parts;

[0020] Component 2: Dimethylaniline, 1.2 parts;

[0021] Component 3: Inorganic modifier, containing 5 parts of 42.5 grade Portland cement, 3.0 parts of SiC powder, 0.10 parts of graphite powder, and 3.0 parts of stone powder;

[0022] Component 4: antioxidant 1010, 0.10 parts.

[0023] The specific preparation method of component 1 is: 100 parts of methyl methacrylate, 0.65 parts of dibenzoyl peroxide, and 20 parts of dibutyl phthalate are mass-polymerized in a water bath at 78°C for about 35 minutes. When the viscosity increased to 145mPa·s, the reactant was taken out and rapidly cooled to room temperature in ice water for use. Component 1 in Example 2, Example 3 and Example 4 was all prepared by this method.

[0024] The present invention can be prepared by uniformly mixing the four components according to the above proportions. The initial viscosity is 194mPa·s, the tensile strength is 26.5MPa, the bending...

Embodiment 2

[0032] Component 1: methyl methacrylate prepolymer, 100 parts;

[0033] Component 2: Dimethylaniline, 1.5 parts;

[0034] Component 3: Inorganic modifier, containing 12 parts of 42.5 grade Portland cement, 3.0 parts of SiC powder, 0.20 parts of graphite powder, and 6.8 parts of stone powder;

[0035] Component 4: Antioxidant 1010, 0.3 parts.

[0036] The present invention can be obtained by uniformly mixing the four components according to the above proportions. The initial viscosity is 200mPa·s, the tensile strength is 28.3MPa, the bending strength is 54.4MPa, the curing time is 132min, and there is almost no shrinkage. The bending and tensile strength can be restored to more than 93%, and the specimen has a new failure surface, which is gray in color.

Embodiment 3

[0038] Component 1: methyl methacrylate prepolymer, 100 parts;

[0039] Component 2: Dimethylaniline, 1.8 parts;

[0040] Component 3: Inorganic modifier, containing 14 parts of 42.5 grade Portland cement, 3.0 parts of SiC powder, 0.30 parts of graphite powder, and 7.7 parts of stone powder;

[0041] Component 4: Antioxidant 1010, 0.2 parts.

[0042] The present invention can be prepared by uniformly mixing the four components according to the above proportions. The initial viscosity is 203mPa·s, the tensile strength is 36.6MPa, the bending strength is 63.8MPa, the curing time is 127min, and there is almost no shrinkage. The bending and tensile strength can be restored to more than 95%, and the specimen has a new failure surface, which is gray in color.

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Abstract

The invention relates to an airport pavement micro-crack fast repairing agent and a preparing process, which belongs to the technical field of novel chemical construction materials. The fast repairing agent comprises 100 parts by weight of methyl methacrylate prepolymer which is 100MPa,s-200MPa,s in viscosity, 1.0-2.0 parts by weight of dimethylaniline, an inorganic modifier with a specific surface area of more than 400m2 / kg, wherein the inorganic modifier comprises 5-16 parts by weight of cement, 1.0-5.0 parts by weight of SiC powder, 0.1-0.5 parts by weight of graphite powder and 3-12 parts by weight of stone powder, and 0.1-0.5 parts by weight of antioxidant 1010. The repairing agent has the advantages of low viscosity (150MPa,s-300MPa,s), good grouting property, high adhesive intensity, fast curing, small shrinkage and convenient production and usage.

Description

technical field [0001] The invention relates to a fast repairing agent mainly used for micro cracks in the structure of airport pavement (including runway, taxiway, parking apron, etc.), and belongs to the field of chemical building materials. Background technique [0002] During the long-term use of the airport pavement structure, it often has to withstand the impact, fatigue and wear of different aircraft axle loads, as well as the freeze-thaw cycle of the natural environment, alternating wet and dry, and corrosion, and a large number of tiny cracks with a width of less than 0.2mm will appear. If it is not repaired in time, under the repeated action of various deterioration factors, the cracks will continue to expand and intensify, and phenomena such as drop corners and broken plates will appear, which will reduce the service life of the pavement structure and affect the take-off and landing of the aircraft. At present, there are few reports on the research and application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B26/02C04B111/72
CPCC04B28/04C04B2111/34C04B2111/72C04B2201/10
Inventor 高培伟卢小琳耿飞李小燕金少春
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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