Crack repair material for asphalt concrete pavement

A technology for asphalt concrete and pavement cracks, applied to roads, roads, pavement details, etc., can solve the problems of large shrinkage rate of consolidated bodies, long repair and consolidation time, and reduced average strength, so as to improve the impact of vehicle load and environmental factors ability, good fluidity and pourability, good tensile shear strength

Inactive Publication Date: 2012-12-19
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The urea-formaldehyde resin chemical grouting material has a high compressive strength of the consolidated body, but the free formaldehyde contained in the urea-formaldehyde resin slurry is toxic and has a strong pungent smell, poor impermeability, and the consolidated body is hard and brittle. The material is cured under acidic conditions, which is corrosive to the equipment and unsafe to the human body
Methyl methacrylate (formin) chemical grouting material has low viscosity and is suitable for repairing micro-cracks. The disadvantage is that the shrinkage rate of the consolidated body is large, which will cause partial voiding between the consolidated body and the surface of the repaired crack. , reducing the average intensity
Epoxy resin chemical grouting, with its excellent bonding strength, high consolidation strength, small shrinkage, and flexible curing formula design (different systems can be cured at low temperature, medium temperature, and high temperature, and can be cured quickly or slowly. ) and other advantages, it is used in water conservancy and electric power, seaport docks, tunnel culverts, mines, subways, etc., but most epoxy slurry materials have disadvantages such as high viscosity, strong hydrophobicity, high brittleness, and poor adhesion to wet cracks. Water-based, grouting materials with better comprehensive performance can be obtained
Polyurethane (cyanide) chemical grouting material has high activity, and the consolidated body has good elasticity and strength, but the viscosity of the slurry itself is relatively high, and the storage period of raw materials is short
[0008] At present, most of the asphalt concrete pavement repair materials used in my country are epoxy resin and polyurethane organic repair materials. The color of this material is generally different from that of asphalt pavement. The post-shrinkage is relatively large, and the thermal expansion coefficient of asphalt concrete is greatly different

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Before preparing the asphalt concrete pavement crack repair material, first prepare epoxy acrylate and toughening agent, the preparation method is as follows:

[0066] 1) Preparation of epoxy acrylate

[0067] Add 100g of bisphenol A type epoxy resin and 0.1g of hydroquinone into a four-necked flask, stir and heat, and after reaching 70°C, slowly add dropwise an acrylic acid mixture mixed with 2.5g of triethanolamine, the acrylic acid is 41g, controlled The reaction temperature was 90°C, and the dropwise addition was completed within 1.5 hours; after 4 hours of reaction, the acid value was measured to be 0.246mgKOH / g, and the reaction was stopped. Stop stirring after about 40°C to obtain an epoxy acrylate solution containing a fixed percentage of diluent, transfer it to a container and seal it for storage until use;

[0068] 2) Preparation of toughening agent

[0069] Add 100g of polyether diol (DL-1000) into a four-necked flask with a thermometer, stir and heat to ab...

Embodiment 2

[0074] 1) Preparation of epoxy acrylate

[0075] Add 100g of bisphenol F-type epoxy resin and 0.1g of polymerization inhibitor into a four-necked flask, stir and heat. After reaching 70°C, add 1.5g of N,N-dimethylaniline, and slowly add 41g of acrylic acid dropwise to control The reaction temperature was 110°C, and the dropwise addition was completed within 1.5h; after 1.5h of reaction, the acid value was measured to be 0 mgKOH / g, and the reaction was stopped. When the reactant was cooled to 60~70°C, 20g of diluent was added, and the temperature continued to cool after mixing evenly After reaching about 40°C, stop stirring to obtain an epoxy acrylate solution containing a fixed percentage of diluent, and transfer it to a container for sealed storage until use;

[0076] 2) Preparation of toughening agent

[0077] Add 100g of polyether diol (DL-2000) into a four-necked flask with a thermometer, stir and heat to about 120°C, turn on the circulating water vacuum pump, dehydrate u...

Embodiment 3

[0082] 1) Preparation of epoxy acrylate

[0083] Add 100g of bisphenol A type epoxy resin and 0.05g of polymerization inhibitor into a four-necked flask, stir and heat, and after reaching 70°C, slowly add dropwise the acrylic acid mixture mixed with 2g of catalyst, the acrylic acid is 41g, and the reaction temperature is controlled at 110°C, the dropwise addition is completed within 1.5h; after 1.5h of reaction, the measured acid value is 1.85mgKOH / g, stop the reaction, add 20g of diluent when the reactant is cooled to 60~70°C, mix well and continue to cool down to 40°C After about 10 minutes, stop stirring to obtain an epoxy acrylate solution containing a fixed percentage of diluent, which is transferred to a container and sealed for storage until use.

[0084] 2) Preparation of toughening agent

[0085] Add 100g of polyether diol (DL-2000) into a four-necked flask with a thermometer, stir and heat to about 120°C, turn on the circulating water vacuum pump, dehydrate under re...

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Abstract

The invention discloses a crack repair material for an asphalt concrete pavement, and is characterized in that epoxy acrylate is taken as a substrate material, and a toughening agent, a diluent, an initiator, a promoter, a cross-linking agent and a pigment are doped to modify and adjust, by utilizing the invention, a big crack on the asphalt concrete pavement is repaired at high efficiency, and a tiny crack is effectively repaired, so that the capacity of resisting a vehicle load and influence of an environment factor of the asphalt concrete pavement can be greatly improved, and the service life of the asphalt concrete pavement is prolonged.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a repairing material for asphalt concrete pavement cracks, which is used for repairing cracks in asphalt concrete pavement. Background technique [0002] Due to the inherent characteristics of asphalt concrete materials, it is inevitable to generate cracks under the influence of various factors during the pavement construction process. Once a crack occurs, it should be repaired in time. Otherwise, under the reciprocating action of the vehicle load and the influence of environmental factors, the crack will expand and penetrate with time, stress concentration will occur at the crack, and the asphalt concrete will fall along the crack and fall in the crack. The breakage of the concrete slab and the slippage of the concrete slab will destroy the integrity of the concrete pavement. When the damage develops to a certain extent, mud starts to pump at the cracks, cross cracks ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/10C09J11/08E01C11/02
Inventor 尹健刘海霞周爱国王晖吴昊陈卫东庄彩虹刘有才庞绮玲宋卫民
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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