KR20050097585A - Method for paving road using colored aggregate - Google Patents

Abstract

The present invention relates to a method for paving color asphalt roads using colored aggregates, and more particularly to preparing and installing asphalt mixtures suitable for the function of roads, using asphalt colored asphalt during the production or construction of the asphalt mixtures. It is possible to realize the colorization of color, and to use various black asphalt pavement or resin-based bleaching binders as binders, various color asphalt pavements by colored aggregates are possible, and the function of color roads is not lost due to discoloration. Preparing an asphalt mixture comprising mixed aggregates or colored aggregates mixed with colored aggregates 79.0-95.0 wt%, 4.0-9.0 wt% binder, 0.1-3.0 wt% modifier and 0.9-9.0 wt% filler; Compacting after laying the prepared asphalt mixture on the road surface or spraying colored aggregate on the surface after laying the asphalt mixture; In the case of semi-rigid paving, the step of curing by infiltrating the cement paste into the pores of the laid and compacted asphalt mixture; And grinding the pavement surface.

Description

{Method for paving road using colored aggregate}

The present invention relates to a method for paving color asphalt roads using colored aggregates, and more particularly to preparing and installing asphalt mixtures suitable for the function of roads, using asphalt colored asphalt during the production or construction of the asphalt mixtures. It is possible to realize the colorization of color, and to use various black asphalt pavement or resin-based bleaching binders as binders, various color asphalt pavements by colored aggregates are possible, and the function of color roads is not lost due to discoloration. will be.

Looking at the conventional color asphalt pavement, pavement method of adding a pigment to the asphalt mixture using a black general road paving asphalt or a colorless resin-based decolorizing binder as a binder is mainly used.

The pavement that adds pigments to the asphalt mixture using the black general road paving asphalt as a binder can not be limited in color due to the black asphalt, and when a large amount of pigment is used to secure the clarity of the color There is a problem that the pigment is eluted to adversely affect the environment.

In the case of the pavement in which the pigment is added to the asphalt mixture using a colorless resin-based decolorizing binder as a binder, it is easy to realize various colors according to the type and amount of the pigment, but the color function due to the discoloration of the pigment by ultraviolet rays and the wear of the aggregate surface Loss of easily occurs, there is a risk of environmental damage due to the use of toxic pigments, there is a problem that the decolorizing binder is expensive.

In addition, the asphalt pavement and resin-based discoloration binder for general road pavement, the flow of the asphalt and the binder softens in the road of high temperature and heavy traffic in the summer, the wheel marks due to stickiness of the pavement surface and contaminants adhere to the loss of color function In addition to promoting the resistance to plastic deformation has a disadvantage that is not suitable for the packaging of the roadway.

       In addition, in recent years, some non-slip color pavement packaging using hard aggregates for improving the sliding resistance of the road has been carried out, but despite the high price, the durability of the pavement due to frequent maintenance and the economicality of the pavement has emerged as a disadvantage.

        In addition, color pavement by cement concrete is partly implemented around pedestrian roads, but its function is less than that of asphalt roads in walking and driving safety and comfort, and the curing time of cement concrete is longer, so the installation period of pavement is longer. Because of its long length, it is not easy to apply other than the new section of the road.

Therefore, an object of the present invention is to solve the problems of the conventional paving method as described above, by using a colored aggregate to enable a variety of color asphalt pavement using any of the black asphalt and resin-based bleaching binder as a binder. Not only do not worry about the loss of color function due to discoloration, but also to improve the color function according to the wear of the pavement surface during common use, and by modifying the asphalt using modifiers in the manufacture of asphalt mixture, In addition to improving the resistance to stickiness and plastic deformation, it is possible to secure eco-friendliness by not using colored pigments and to apply the method of chipping colored aggregates to the packaging surface in places where slip resistance is particularly required. Need to secure tunnels and night visibility The luminous glass can be used for the packaging of places to have a luminous function. Especially, as a countermeasure for the long life of the places and pavement where there is a lot of delay and stagnation of heavy vehicles, the plastic deformation is concerned. The present invention provides a method for paving color asphalt roads using colored aggregates, which makes it possible to realize semi-rigid color asphalt pavement in which a cement paste, which is a rigid material, is infiltrated into the voids.

Color asphalt road paving method using the colored aggregate of the present invention for achieving the above object, 79.0-95.0 wt% of mixed aggregate mixed with colored aggregate, 4.0-9.0 wt% of binder, 0.1-3.0 wt% of modifier and filler Preparing an asphalt mixture of 0.9 to 9.0% by weight; Laying and compacting the prepared asphalt mixture on a road surface; And grinding the pavement surface.

In addition, preparing an asphalt mixture of 79.0 to 95.0% by weight of general aggregate, 4.0 to 9.0% by weight of binder, 0.1 to 3.0% by weight of modifier, and 0.9 to 9.0% by weight of filler; After laying the prepared asphalt mixture on the road surface is characterized in that it comprises a step of compacting by spraying and chipping the colored aggregate.

Hereinafter, preferred embodiments of the present invention will be described in detail to those skilled in the art to which the present invention pertains.

First prepare an asphalt mixture containing colored aggregates. The asphalt mixture is to mix the binder, the modifier and the filler to the mixed aggregate mixed colored aggregate, the mixing ratio of the mixed aggregate 79.0 to 95.0% by weight, binder 4.0 to 9.0% by weight, modifier 0.1 to 3.0% by weight, The filler is 0.9 to 9.0% by weight, and the reason is that when the blending ratio of the binder is less than 4.0% by weight, the role of the binder is insignificant, and when the content is more than 9.0% by weight, the physical properties of the asphalt mixture are improved. This is because if it is difficult to exceed and exceeds 3.0% by weight, the filler is excessive compared to the binder, and if the filler is less than 0.9% by weight, the role as the filler is insignificant, and when it exceeds 9.0% by weight, the excess is excessive.

In addition, when there is no colored aggregate suitable for the required color, a small amount of pigment may be mixed with the asphalt mixture. The amount of filler used in the asphalt mixture may be 0.4 to 4.0% by weight and the inorganic pigment may be mixed with 0.5 to 5.0% by weight. To get the required color. At this time, if the inorganic pigment is less than 0.5% by weight, it is difficult to express the color, and if it exceeds 5.0% by weight, the excess is used so that 0.5 to 5.0% by weight is used.

The mixed aggregate should be the amount of colored aggregates more than 30% by weight of the total aggregate, which is the minimum standard to secure the effect of the colorization, in the area where the desired goal is achieved at the point where the distinction of the road simply needs to be achieved. The minimum amount can be adjusted.

In addition, it is also possible to use only colored aggregates without using general aggregates, but in consideration of its colorization effect and cost, it is preferable to use 10-70 wt% of general aggregates mixed with 30-90 wt% of colored aggregates. .

The colored aggregate may be any one or two or more mixed aggregates selected from the group consisting of natural colored aggregates, colored aggregates surface-colored aggregates, artificial aggregates, hard slag and waste clay bricks. That is, it means colored aggregates including natural gray or white aggregates, as well as colored aggregates artificially colored white aggregates such as silica, and inorganic pigments added to appropriate raw materials, and artificially calcined at a high temperature of 1200 ° C. or higher. Artificial aggregates, hard slag, fired closed clay bricks, etc., and appropriate colored aggregates should be selected and used according to the purpose and function of the road.

As the binder, it is possible to use asphalt or resin discoloration binder. In order to further increase the effect of color, a colorless petroleum resin decolorization binder is used. The amount of the binder is used within the range of use depending on the type of asphalt mixture. Determined by formulation design method that satisfies quality standards.

Modified materials for the asphalt and resin discoloration binders as binders include styrene butadiene rubber (SBR, Styrene Butadiene Rubber), powder rubber modifier (SBS), styrene butadiene styrene (SBS, Styrene Butadiene Styrene), polyethylene (PE, Polyethylene ), Polypropylene (PP, Polypropylene) is used, and the type and amount of the modifier are determined according to the type of asphalt mixture and the function and characteristics of the road, and the amount of each mix used is designed to meet the quality standards of the asphalt mixture. Determined by the method.

In addition, the inorganic pigment optionally used may be used according to the color, for example, iron oxide in the red color, chromium oxide in the green color, ultramarine in the blue color, and the like, but is not limited thereto. Choose the right pigment for the color and use it within the range.

When the asphalt mixture is prepared as described above, it is determined to be laid in a construction method suitable for the function and characteristics of the pavement, and if necessary, the pavement surface is polished to complete the pavement.

That is, the asphalt mixture according to the present invention can use all of the flow resistant asphalt mixture, the permeable and drainable asphalt mixture, the semi-rigid asphalt mixture, and the like, so that the blending design may be appropriately suited to the purpose of each mixture.

Particularly, when semi-rigid asphalt pavement is required, the semi-rigid pavement can be realized by adding a step of curing cement paste into the voids of the asphalt mixture after curing and compacting the porous asphalt mixture. And a lot of stagnation, in particular, to prevent breakage of the point where plastic deformation is concerned, and to prolong the service life.

As a method of infiltrating the cement paste, the cement paste is spread on the asphalt pavement surface, and then vibrated with a vibrating plate, a vibrating roller, etc. to extract the bubbles therein while sufficiently infiltrating the cement paste, and retaining the excess cement on the surface. The paste may be scraped and removed to the extent that the aggregate of the asphalt mixture is exposed by rubber reiki or the like, so that measures for preventing slipping may also be taken.

At this time, the cement paste for penetration may be colorless or colored, and of course, a paste suitable for the purpose of curing time according to Table 1 below may be used.

Curing period of cement paste (until traffic opening) Type of cement paste Curing period Normal type About 3 days Rough Steel Type About 1 day Super fast About 3 hours

In addition, the cement paste is easy to infiltrate into the parent asphalt mixture, the flow value does not change within the infiltration time, and the required strength must be obtained until the traffic is opened, and the curing properties are good even at low temperatures, and the resistance to freezing and thawing is excellent. In order to increase the sliding resistance, the silica sand may be mixed.

When cement paste is injected, it should be carried out after the temperature of asphalt mixture is below 30 ~ 40 ℃, and it is necessary to protect the road surface by using vinyl sheet to prevent contamination and damage around the existing road surface before constructing the cement paste for penetration. Precautions should be taken, and the end of construction should take appropriate measures to prevent the cement paste from flowing out. The penetration workability of the injected cement paste should be measured by lot method and the range of 10-40 seconds should be within the standard fluidity range. The quality of is to meet the criteria of Table 2 below.

Quality Standards for Cement Paste Item Standard appearance Flow (Lot Method) 10 to 14 sec Compressive Strength (7 Days) 100-300kg / ㎠ Flexural strength (7 days) 30 kg / ㎠ or more

In addition, when the glass paste is mixed with the cement paste, the luminous function may be exhibited due to the glass grain contained in the paste, thereby helping to ensure luminous visibility.

In addition, in the case of using black general road paving asphalt as a binder, after finishing the road paving work, a step of polishing the pavement surface is additionally performed to express coloration. If road paving asphalt is used and the grinding step is not carried out, the asphalt coating part of the surface is peeled off and the colored aggregate is expressed by peeling off the surface. The polishing process is carried out by a polishing machine so that colorization by colored or colored aggregate at the beginning of packaging can be realized.

The road paving method according to the present invention can be chipped only on the surface without mixing the colored aggregate during the production of asphalt mixture, the method is as follows.

Prepare an asphalt mixture first, but prepare a conventional asphalt mixture without using colored aggregates. That is, prepare an asphalt mixture consisting of 79.0 to 95.0% by weight of general aggregates, 4.0 to 9.0% by weight of binders, 0.1 to 3.0% by weight of modifiers, and 0.9 to 9.0% by weight of fillers, and immediately after laying it on the surface, spraying colored aggregates. By chipping (chipping), not only the expression of coloration but also the anti-slip function by the chipped colored aggregate.

In addition, in places where it is necessary to secure visibility in the night tunnel and at night, by mixing glass chips with colored aggregates, it is possible to ensure night visibility.

Colored aggregate used in the chipping is used as a hard aggregate Los Angeles wear loss of less than 20% to facilitate chipping.

Since the composition and the mixing ratio of the asphalt mixture of the chipping and paving method are the same as the method of laying and mixing the colored aggregate in the asphalt mixture described above, the description thereof will be omitted.

As the binder, it is possible to use general road paving asphalt or resin discoloring binder. In order to further enhance the effect of color, a colorless binder, which is a colorless petroleum resin, is used and its amount is used within the range of use according to the type of asphalt mixture. It is determined by the formulation design method that satisfies the quality standards of the mixture.

As a modifier of the asphalt and resin decolorizing binder as the binder, styrene butadiene rubber (SBR, Styrene Butadiene Rubber), powder rubber modifier (SBS Styrene Butadiene Styrene), polyethylene (PE, Polyethylene) , Polypropylene (PP, Polypropylene), etc., and the type and amount of the modifier are determined according to the type of asphalt mixture and the function and characteristics of the road, and the amount of each mix is used to meet the quality standards of the asphalt mixture. Decide by

In addition, the inorganic pigment optionally used may be used according to the color, for example, iron oxide in the red color, chromium oxide in the green color, ultramarine in the blue color, and the like, but is not limited thereto. Choose the right pigment for the color and use it within the range.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

(Example)

Asphalt mixture using the colored aggregate of the present invention was combined as shown in Table 3.

Mixing ratio (wt%) of the asphalt mixture according to each example and comparative example division aggregate Binder Modifier Filler Pigment Colored aggregate Coarse aggregate Fine aggregate asphalt Color Binder Example 1 50.0 45.0 43.8 6.0 - 1.2 4.0 - Example 2 50.0 70.0 19.4 5.5 - 1.1 4.0 - Example 3 50.0 75.0 15.0 5.0 - 1.0 4.0 - Example 4 30.0 45.0 43.8 - 6.0 1.2 2.0 2.0 Comparative Example 1 - 45.0 45.0 6.0 - - 2.0 2.0 Comparative Example 2 - 45.0 45.0 - 6.0 - 2.0 2.0

Example 1 of Table 3 is a color asphalt mixture having flow resistance, Example 2 is a water permeable or drainable color asphalt mixture, Example 3 is a semi-rigid color asphalt mixture, Example 4 is a colored pigment in a modified bleaching binder Representative examples of the added mixture.

In addition, Comparative Example 1 is an example of a mixture in which colored pigment is mixed with general asphalt, which is a conventional color asphalt mixture, and Comparative Example 2 is an example of a mixture in which colored pigment is mixed with a decolorizing binder.

Colored aggregate of the material is silica, which is a natural colored aggregate, Los Angeles wear loss of 17%, color of white, apparent specific gravity of 2.68, absorption rate of 0.75%, passing 100% in 13mm sieve and 5% in 5mm sieve. Was used.

For coarse aggregates, the maximum size of aggregate was 13mm (78), and granite crushed crushed stone was used. Particle size and physical properties were used to meet KS standards.

The fine aggregate used crushed sand and passed over 95% in 5mm sieve and used the material that meets the property standard of Korean Industrial Standard.

As a binder, asphalt was used in the grade of 80-100 (AP-3) of the asphalt pavement grade of the Korea Industrial Standard. The binder used for the discoloration binder was a domestic H company.

Rubber-based CRM was used as a modifier of the binder and 20% of the binder was used.

Limestone powder was used as the filler and red iron oxide was used as the pigment.

Table 4 is a table showing the high temperature characteristics of the binder modified with a rubber-based CRM modified and unmodified.

Comparison of Quality Characteristics of Binders Item Type of binder General asphalt (AP-3) Resin Bleaching Binder CRM modified asphalt Absolute Viscosity 175 ℃ (CP) 75 450 1850 Softening point (℃) 47 55 75

As can be seen from Table 4, the asphalt modified with CRM shows an increase of about 35 to 60% at the softening point of high temperature properties, compared to general asphalt, which means that the resistance to plastic deformation at high temperatures is improved. Of course, the asphalt mixture prepared from the binder using the modifier indicates that the resistance to the stickiness and deformation of the surface by softening the summer binder is improved.

Table 5 shows the quality characteristics of the mixtures according to Examples and Comparative Examples.

Quality Characteristics According to Examples and Comparative Examples division Porosity (%) Density (g / ㎠) Stability (kg) Dynamic Stability (times / mm) Color maintenance Visibility Example 1 4.5 2.33 960 6450 No discoloration Good Example 2 17.0 2.16 720 4240 No discoloration Good Example 3 20.0 2.05 700 3760 No discoloration Good Example 4 4.6 2.32 1050 7500 Slightly discoloration Good Comparative Example 1 4.0 2.33 750 360 Discoloration and discoloration Bad Comparative Example 2 4.5 2.34 790 1100 Discoloration and discoloration usually

As can be seen in Table 5, Examples 1 to 4 using colored aggregates and modifiers have good dynamic stability, which is a measure of color retention and night visibility, stickiness and resistance to plastic deformation due to high temperature in summer, Comparative Examples 1 and 2, which do not use colored aggregates and modifiers, are deteriorated and discolored prematurely, which impairs the vividness of color. It was found that the above criteria were not satisfied.

In addition, as shown in Example 1 and Comparative Example 2, both the Examples and Comparative Examples satisfy the quality criteria of 500kg or more, but in the case of a mixture having the same porosity, it can be seen that the stability of the mixture using the modifier is much higher. there was.

Although the present invention has been described as described above only in the above embodiments, it is not necessarily limited thereto. For example, the semi-rigid packaging and the hard colored aggregate or glass pellets impregnated with cement paste are packaged by road spraying. It is possible to use all-color asphalt paving using colored aggregate, such as how to, various modifications are possible within the scope and spirit of the present invention.

As can be clearly seen from the above description, the present invention can be seen that it is more durable than the conventional pavement using general aggregate, general binder and pigment, which is a color asphalt paving method. In addition, the use of colored aggregates increases the brightness of the road surface, which improves the road lighting effect inside the tunnel or at night, contributing to vehicle stability. To provide useful effects.

In addition, it does not use colored pigments to prevent environmental pollution due to the outflow of pigments, and waste clay blocks and slag slag can be recycled to colored aggregates, which contributes to the recycling of resources. In the case of chipping and packaging, it provides effects such as preventing slipping and producing various colors on the road surface.

Claims (14)

Asphalt road paving method, Preparing an asphalt mixture comprising 79.0 to 95.0 wt% of mixed aggregates of colored aggregates, 4.0 to 9.0 wt% of binders, 0.1 to 3.0 wt% of modifiers, and 0.9 to 9.0 wt% of fillers; Color asphalt road paving method using colored aggregates comprising the step of laying and compacting the prepared asphalt mixture on the road surface. The method of claim 1, After the installation and compaction step, the cement asphalt road paving method using the colored aggregate, characterized in that further comprising the step of infiltrating the cement paste into the voids of the asphalt mixture of the laid and compacted asphalt mixture. The method of claim 2, The cement paste, color asphalt road paving method using colored aggregates, characterized in that the glass paste is mixed with the cement paste. The method according to any one of claims 1 to 3, The colored aggregate is colored asphalt using any one or two or more mixed aggregates selected from the group consisting of natural colored aggregates, colored aggregates surface-colored aggregates, artificial aggregates, hard slag and waste clay bricks Road paving method. The method according to any one of claims 1 to 3, The binder is a color asphalt road paving method using colored aggregates, characterized in that the resin-based bleaching binder. The method of claim 5, The modifier is styrene butadiene rubber, powdered rubber modifier, styrene butadiene styrene, any one of the color asphalt road paving method using colored aggregates characterized in that the polyethylene and polypropylene. The method according to any one of claims 1 to 3, The binder is a color asphalt road paving method using colored aggregates, characterized in that the road paving asphalt. The method of claim 7, wherein After paving the road, the color asphalt road paving method using colored aggregates, characterized in that further comprising the step of polishing the pavement surface. The method of claim 7, wherein The modifier is styrene butadiene rubber, powdered rubber modifier, styrene butadiene styrene, any one of the color asphalt road paving method using colored aggregates characterized in that the polyethylene and polypropylene. Asphalt road paving method, Preparing an asphalt mixture comprising 79.0 to 95.0 wt% of general aggregate, 4.0 to 9.0 wt% of binder, 0.1 to 3.0 wt% of modifier, and 0.9 to 9.0 wt% of filler; Color asphalt road paving method using colored aggregates comprising the step of laying the prepared asphalt mixture on the road surface and spraying and chipping the colored aggregate. The method of claim 10, The binder is a color asphalt road paving method using colored aggregates, characterized in that the road paving asphalt or resin-based bleaching binder. The method of claim 10 or 11, The modifier is styrene butadiene rubber, powdered rubber modifier, styrene butadiene styrene, any one of the color asphalt road paving method using colored aggregates characterized in that the polyethylene and polypropylene. The method of claim 10 or 11, In the step of spraying and chipping the colored aggregates, color asphalt road paving method using colored aggregates, characterized in that the spraying, chipping and compacting by mixing the colored aggregates and glass pellets. The method of claim 10 or 11, The colored aggregate is colored asphalt using any one or two or more mixed aggregates selected from the group consisting of natural colored aggregates, colored aggregates surface-colored aggregates, artificial aggregates, hard slag and waste clay bricks Road paving method.