JPH08209620A - Repairing method for asphalt concrete pavement and repairing material - Google Patents

Abstract

PURPOSE: To improve workability by filling pot holes generated in asphalt concrete pavement with repairing material consisting of mixture of asphalt concrete regenerated aggregate and a hardening agent having specific clay. CONSTITUTION: A hardening agent, A liquid composed of epoxy resin 31wt.%, modified epoxy resin 4wt.%, and organic solvent 65wt.% is prepared. Further a hardening agent, B liquid composed of modified polyamide amine 23wt.% and organic solvent 77wt.% is prepared. The A liquid and the B liquid are mixed together at the weight ratio one to one so as to prepare a hardening agent of viscosity under 60 poise at ordinary temperature. Further, after mixing asphalt concrete regenerated aggregate with the hardening agent of 5% weight to the weight of the aggregate so as to prepare a repairing material, pot holes generated in asphalt concrete pavement are filled with the repairing material, and pressed and cured. Consequently because the hardening agent has low viscosity, a special tool is unnecessary for mixing it with the aggregate, the execution at filling is simple, and hence the worhability can be improved.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a dent, a depression, or the like formed on the surface of an asphalt concrete pavement such as a road or a runway.
The present invention relates to a method for repairing pavement by filling in defects (hereinafter referred to as "potholes") and a repair material used for this method.

[0002]

2. Description of the Related Art Conventionally, two major methods have been employed for repairing asphalt concrete pavements, namely, a method using a heated mixture and a method using a room temperature mixture. The method using the heated mixture is excellent in durability after construction, but has the following problems during construction. In order to maintain the paveable temperature after mixing, the construction time is extremely limited, and therefore the material is wasted. A relatively large set of construction machinery is required, and in particular a press machine of standard size is essential. To open the traffic after construction, it is necessary to cure the mixture until it cools. On the other hand, the method of using a heated mixture has both durability and ease of use, but lacks stability and its improvement has been demanded. The stability here means the stability (Kg) of asphalt concrete by a Marshall tester.

On the other hand, road pavement has recently entered the era of maintenance / repair from the time of new construction, and the problem of the disposal of asphalt waste generated during the construction of maintenance / repair must be dealt with. If this asphalt waste material is used for the above-mentioned room temperature mixed material, it will open an effective application for the reuse of the asphalt waste material. The asphalt waste material mentioned here refers to the recycled asphalt concrete aggregate that meets the standards of the "Technical Guidelines for Plant Reclaimed Pavement" of the Japan Road Association, which is the old asphalt content (%).
Is 3.8 or more, penetration of old asphalt (25 ° C, 1
/ 10 mm) is 20 or more, the amount lost in the washing test (%)
Is 5 or less.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problem of stability, which is a drawback of repairing with a room temperature mixture, and to utilize recycled asphalt concrete aggregate for repairing asphalt concrete pavement. It is in. The present invention, in order to achieve this object, by melting the asphalt contained in the asphalt concrete recycled aggregate to ensure workability and stability during the construction of a room temperature mixture which is a repair material, and after the construction, a curing agent The basic concept is to ensure stability by curing with.

[0005]

A method for repairing asphalt concrete pavement according to the present invention is a repair method comprising a mixture of recycled asphalt concrete aggregate and a curing agent containing an organic solvent and having a viscosity of about 60 poise or less at room temperature. Includes filling potholes created in asphalt concrete pavement with lumber. The repair material for asphalt concrete pavement according to the present invention comprises an asphalt concrete recycled aggregate and a curing agent having a weight of 5% of the weight of the aggregate, and the curing agent is the epoxy resin 3 in a weight ratio.
A solution consisting of 1%, modified epoxy resin 4% and organic solvent 65%, and a mixture of solution B consisting of modified polyamidoamine 23% and organic solvent 77% in a weight ratio. The mixing ratio of liquid B is 1: 1 by weight.
Is.

[0006]

In the recycled asphalt concrete aggregate, the asphalt contained therein is melted by a low-viscosity curing agent containing an organic solvent to generate fluidity, and is cured with time to develop strength.

[0007]

[Effect of the Invention] Asphalt concrete aggregates can be made fluid by mixing with a hardening agent to ensure workability and stability during construction, and also harden with a hardening agent over time after construction. To develop strength and increase stability. Further, according to the present invention, since the curing agent has a low viscosity, a kneading tool such as a “spatula” is not required when mixing the curing agent with the asphalt concrete aggregate, and the pothole No special machinery is required for filling. Therefore, since the construction is simple, the method and repair material of the present invention, in addition to repairing the pothole of the asphalt concrete pavement, step abrasion,
It can be widely used for emergency restoration work and small area construction.

[0008]

EXAMPLES When carrying out the repairing method according to the present invention, first, if necessary, the inside of the pothole formed in the asphalt concrete pavement is cleaned to remove dust, mud and the like.
If water remains, remove it, but do not need to dry it.

Next, a curing agent is prepared. Therefore, in advance, 31% by weight of epoxy resin and 4 of modified epoxy resin
% And an organic solvent 65%, and a solution B composed of a modified polyamidoamine 23% and an organic solvent 77% by weight have been carried into the site of the repair work, and with the start of the repair work, A Mix solution and solution B. The both are mixed by throwing one into the other and shaking the container. The mixing ratio of the liquid A and the liquid B is 1: 1 by weight. The viscosity of this curing agent is adjusted so that it has a viscosity of about 60 poise or less at room temperature. The viscosity of the curing agent of about 60 poise or less at room temperature is very low as compared with the curing agent for a conventional room temperature mixture having a high viscosity of several thousand poise.
According to experiments, asphalt concrete recycled aggregate
When this is put in a bag together with a curing agent and shaken, it is uniformly mixed with a curing agent having a viscosity of about 60 poise at room temperature in about 2 minutes, but a curing agent having a viscosity of 70 poise or more takes more than double the time. In addition, uniform mixing with a curing agent having a viscosity of 100 poise or more cannot be obtained. Therefore, the viscosity of the curing agent is adjusted to be about 60 poise or less at room temperature. The viscosity is adjusted by adjusting the A liquid and the B liquid of the curing agent in a ratio of 1: 1.
It can be carried out by adjusting the amount of the organic solvent in each liquid while maintaining the mixing ratio.

Next, a repair material is prepared. For that purpose, the asphalt concrete recycled aggregate is mixed with 5% by weight of its curing agent. This mixing is carried out, for example, by putting 125 g of the curing agent in a bag containing 5 kg of asphalt concrete aggregate, closing the mouth of the bag, and shaking well. Therefore, it is not necessary to use a mixing spatula or the like for mixing the both. The low-viscosity hardener containing an organic solvent dissolves the asphalt in the recycled asphalt concrete aggregate and imparts fluidity to the repair material.

Then, the obtained repair material is filled into the pothole to be repaired before it is cured. After filling, pressure is applied to the flat part of the scoop, for example, by tapping lightly, and curing is performed for about 10 minutes. During this time, the repair material is hardened by the action of the hardening agent, develops strength, and is firmly integrated with the existing pavement. After that, the repaired road surface can be used for traffic. According to the repair according to the present invention, the time required from the cleaning of the pothole to the completion of the curing is about 20 minutes.

As described above, according to the present invention, asphalt contained in recycled asphalt concrete aggregate is fluidized by a low-viscosity curing agent containing an organic solvent to enhance workability and to improve stability during and after construction. This makes it possible to eliminate the drawbacks of the repair by the conventional room temperature mixture, and at the same time, to utilize the waste asphalt concrete.

Claims (7)

[Claims] 1. An asphalt concrete recycled aggregate,
A method for repairing asphalt concrete pavement, which comprises filling a pothole generated in the asphalt concrete pavement with a repair material comprising a mixture with a curing agent containing an organic solvent and having a viscosity of about 60 poise or less at room temperature. 2. The repair method according to claim 1, wherein the inside of the pot hole is cleaned before filling the repair material. 3. The repair method according to claim 1, wherein after the repair material is filled, the repair material is pressurized and cured. 4. The curing agent comprises a solution A consisting of an epoxy resin 31%, a modified epoxy resin 4% and an organic solvent 65% by weight, and a modified polyamidoamine 23% and an organic solvent 77% by weight. The repair method according to claim 1, wherein the solution A and the solution B are mixed in a weight ratio of 1: 1 immediately before mixing with the asphalt concrete recycled aggregate. 5. The repair method according to claim 1, wherein the repair material is composed of recycled asphalt concrete aggregate and a curing agent having a weight of 5% of the weight of the aggregate. 6. Cleaning of the inside of a pot hole formed in asphalt concrete pavement, A solution consisting of 31% by weight of epoxy resin, 4% of modified epoxy resin and 65% of organic solvent and modified polyamidoamine 23 by weight ratio. % And liquid B consisting of 77% of an organic solvent are mixed in a weight ratio of 1 pair to prepare a curing agent, and asphalt concrete recycled aggregate is mixed with 5% by weight of the curing agent. A repair method for asphalt concrete pavement, which comprises: preparing a repair material by filling the pothole with the repair material, applying pressure, and curing. 7. An asphalt concrete recycled aggregate,
5% of the weight of the aggregate is used as a curing agent, and the curing agent has a weight ratio of 31% of the epoxy resin, 4% of the modified epoxy resin and 65% of an organic solvent, and A solution. ,
A repair material for an asphalt concrete pavement, which is composed of a mixture of a liquid B comprising 23% of modified polyamidoamine and 77% of an organic solvent, and a mixing ratio of the liquid A and the liquid B in the curing agent is 1: 1 by weight ratio.