KR20230027953A - Recycling method of municipal solid waste incineration bottom ash, hot asphalt mixture using the incineration bottom ash, producing method thereof - Google Patents

Abstract

The present invention relates to recycling of household waste incineration floor ash, more specifically, to a method of recycling floor ash ('incineration floor ash') from the incineration ash generated in the incineration process of urban household waste as a substitute for fine aggregate in heated asphalt mixture, a method for processing the incineration floor ash for this purpose, and heated asphalt mixture using such the incineration floor ash as a fine aggregate substitute and method for manufacturing the same. In the present invention, provided is a method of recycling incineration floor ash in which the incinerated floor ash is pretreated including drying, grinding, and screening and then used in a heated asphalt mixture as a replacement for fine aggregate. According to the present invention, it is possible to manufacture a heated asphalt mixture of equivalent quality to a heated asphalt mixture using 100 % natural fine aggregate while recycling a large amount of floor incineration ash and greatly reducing the amount of natural fine aggregate such as sand by using pretreated incineration floor ash as a substitute for fine aggregate, which is one of the components of heated asphalt mixture.

Description

Recycling method of municipal solid waste incineration bottom ash, hot mixture using the incineration bottom ash, producing method thereof}

The present invention relates to a method for recycling domestic waste incinerated flooring, a heated asphalt mixture using incinerated flooring, and a method for manufacturing the same, and more particularly, flooring materials (hereinafter referred to as 'incinerated flooring') among incinerated ash generated in the incineration process of urban household waste. It relates to a method of recycling as a substitute for fine aggregate of heated asphalt mixture, a method of treating incinerated floor ash for this purpose, a heated asphalt mixture using such incinerated floor as a substitute for fine aggregate, and a manufacturing method thereof.

With the rapid economic development and population concentration in cities, the amount of household waste generated in cities in Korea is rapidly increasing. Municipal waste is buried directly or landfilled after incineration, and scrap components and slag separated from the incineration ash generated in the incineration process are recycled in significant amounts. However, the recycling rate of bottom ash and fly ash, which account for most of the incineration ash, is very low.

The main components of the floor ash generated in the incineration process of municipal waste are minerals such as calcium oxide (CaO), silica (SiO ₂ ), iron oxide (Fe ₂ O ₃ ), and alumina (Al ₂ O ₃ ), which are easily recycled. It is possible and it is a very valuable secondary resource for Korea, which lacks underground resources. In addition, considering the current situation in which most of the final disposal of incinerated municipal waste depends on landfill, it is urgent to devise a method that can be recycled without landfilling in Korea, which has a small land area.

Therefore, recycling of incineration floor ash generated in the incineration process of urban waste is essential not only for resource recovery but also for national environmental preservation and is the best way to build a sustainable resource circulation society.

So far, studies have been conducted to recycle the incinerated floor ash generated in the incineration process of domestic waste in the construction brick or cement industry. For the recycling of incinerated floor ash, Korean Patent Registration No. 10-2105615 suggested a recycling method used in the manufacture of cement blocks used as materials for civil engineering and construction by sorting glass and minerals from incineration ash generated in the waste incineration process. In addition, Korean Patent Registration No. 10-0440212 proposed a method of recycling as a filling material for asphalt concrete ashes generated in the incineration process of industrial or household waste. Korean Patent Registration No. 10-0902281 suggests an inorganic binder composition that can be used for blocks, tiles, concrete, etc. as a substitute for cement as a way to recycle city waste incineration ash and a method for manufacturing the same.

However, among the methods proposed in the prior art, there is no commercialized method for practically recycling incineration ash generated in the incineration process of municipal waste. Therefore, there is an urgent need to develop a method that can commercially recycle incineration ash, which has been dependent on simple landfill.

The main constituents of hot asphalt mixtures are aggregate, fine aggregate and filler. Aggregate and fine aggregate are basic materials constituting the heated asphalt mixture, and the filler is a component added to prevent peeling of the asphalt mixture and to prevent aging. Regarding asphalt, Korean Patent Publication Nos. 10-2014-0145514 and 10-2015-0005195 suggest using incineration ash as a component of a filler composition for asphalt pavement. However, when incineration ash is used as a filling material, since only fine particles of 0.3 to 0.075 mm are used among the incineration ash and the amount of filling material is small, the amount of incineration ash actually recycled is small, so the recycling effect is low.

If the incineration floor ash generated in the incineration process of urban waste can be recycled as fine aggregate of the heated asphalt mixture, it will save natural aggregate resources in Korea with poor natural resources and at the same time recycle incineration ash to suppress landfill of incineration ash in a country with a small land area. Since it can protect the environment, it is essential not only in terms of resource recovery but also in terms of national environmental preservation, and it will be the best way to build a sustainable resource circulation society.

Republic of Korea Patent Registration No. 10-2105615 Republic of Korea Patent Registration No. 10-0440212 Republic of Korea Patent Registration No. 10-0902281 Korean Patent Publication No. 10-2004-0099672 Korean Patent Publication No. 10-2014-0145514 Korean Patent Publication No. 10-2015-0005195

In order to solve the problem of difficult recycling of incinerated floor ash generated in the incineration process of municipal waste, the present invention pre-treats the incineration floor ash generated in the incineration process of municipal waste and uses it as a substitute for fine aggregate, a component of the heated asphalt mixture. It is an object of the present invention to provide a recycling method of incinerated floor ash and a method for treating the incinerated floor ash, and to provide a heated asphalt mixture using the incinerated floor ash as a substitute for fine aggregate and a method for producing the heated asphalt mixture.

In the present invention to achieve the above object,

Provided is a method for recycling incinerated flooring, characterized in that the incineration flooring ash discharged from the incineration process of municipal waste is subjected to pretreatment including drying, crushing and sorting, and then used in a heated asphalt mixture as a substitute for fine aggregate.

In the recycling method, the pretreatment,

Drying and sieving the incineration floor ash discharged from the incineration process of municipal waste to separate incineration floor ash of a certain size or less;

Separating the separated incinerated bottom ash by wind; and

It is preferable to include the step of separating the incinerated bottom ash of a certain size or less by crushing and sieving the incineration bottom ash separated by wind.

Also, in the present invention,

Drying and sieving the incineration floor ash discharged from the incineration process of municipal waste to separate incineration floor ash of a certain size or less;

Separating the separated incinerated bottom ash by wind; and

It provides a method for treating incinerated flooring, including the step of separating incineration flooring of a certain size or less by crushing and sieving the incineration flooring selected by wind.

The processing method is

Drying and sieving the incineration floor ash discharged from the incineration process of the municipal waste to separate incineration floor ash having a size of 30 mm or less;

Separating the separated incineration bottom ash with a size of 30 mm or less by wind; and

It is preferable to include the step of separating the incineration floor ash having a size of 6 mm or less by crushing and sieving the incineration floor ash separated by wind.

Also, in the present invention,

In the heated asphalt mixture containing aggregate, fine aggregate, filler and hot asphalt, the pretreated incinerated flooring is substituted for the fine aggregate by 10 to 100% by weight of the weight of the fine aggregate in the mixture, wherein the pretreated incinerated flooring is municipal waste It provides a heated asphalt mixture, characterized in that obtained by treating the incinerated bottom ash discharged from the incineration process with a pretreatment process including drying, grinding and sorting.

In the heated asphalt mixture, it is preferable that the pretreated incineration floor ash is treated with the above incineration floor ash treatment method.

In the heated asphalt mixture, it is preferable that the weight ratio of the aggregate, the fine aggregate, the floor incineration ash and the filling material is 44 to 64: 0 to 45: 5 to 50: 2 to 6.

In a preferred embodiment of the present invention, the hot asphalt mixture is a surface layer hot asphalt mixture containing 13 mm aggregate, fine aggregate, floor incinerator and filler in a weight ratio of 46:30 to 45:5 to 20:4.

In a preferred embodiment of the present invention, the hot asphalt mixture is a hot asphalt mixture for surface layer containing 13 mm aggregate, fine aggregate, floor incinerator and filler in a weight ratio of 44:0 to 10:40 to 50:6.

In a preferred embodiment of the present invention, the hot asphalt mixture is a surface layer hot asphalt mixture containing 13 mm aggregate, fine aggregate, floor incineration material and filler in a weight ratio of 45:30 to 45:5 to 20:5.

In a preferred embodiment of the present invention, the hot asphalt mixture is a hot asphalt mixture for an intermediate layer comprising 20 mm aggregate, 13 mm aggregate, fine aggregate, burnt floor material and fill material in a weight ratio of 35:22:30:10:3.

In a preferred embodiment of the present invention, the hot asphalt mixture is a hot asphalt mixture for base layer comprising 25 mm aggregate, 13 mm aggregate, fine aggregate, burnt flooring and fill in a weight ratio of 46:18:24:10:2.

Also, in the present invention,

Mixing the pretreated incinerated floor ash obtained by treating the incinerated floor ash discharged from the municipal waste incineration process with a pretreatment process including drying, crushing and sorting with aggregate or aggregate and fine aggregate;

heating the mixed mixture to 170-190 °C;

sifting and weighing the heated mixture;

mixing a filler with the measured mixture; and

It provides a method for producing a heated asphalt mixture comprising the step of mixing hot asphalt with the mixture in which the filler is mixed.

In the above manufacturing method, it is preferable to mix the fine aggregate and the pretreated incinerated bottom ash in a weight ratio of 0 to 9:1 to 10.

In the above manufacturing method, it is preferable to mix the aggregate, fine aggregate, pretreated floor incineration ash and filling material in a weight ratio of 44 to 64:0 to 45:5 to 50:2 to 6.

The present invention pretreats incineration floor ash generated in the incineration process of municipal waste, which has not been recycled in the past, and uses it as a substitute for fine aggregate, which is one of the components of a heated asphalt mixture, thereby recycling a large amount of floor incineration ash and greatly reducing the amount of natural fine aggregate such as sand. It is possible to produce a heated asphalt mixture of excellent quality equivalent to that of a hot asphalt mixture using 100% natural fine aggregate while reducing the amount.

In addition, by using floor incineration ash as a substitute for fine aggregate, the input amount of natural fine aggregate is saved, resources are saved by recycling incinerated floor ash, and landfill of incinerated floor ash can be prevented, thereby preventing environmental pollution.

1 is a flowchart showing a preferred embodiment of a method of pre-treating incinerated floor ash generated in the incineration process of municipal waste of the present invention and recycling it as a heated asphalt mixture.

The present invention relates to a method for recycling incinerated floor ash discharged from the incineration process of municipal waste as a substitute for fine aggregate of a heated asphalt mixture, a method for treating the incinerated floor ash for this purpose, a heated asphalt mixture using such incinerated floor ash as a substitute for fine aggregate, and a manufacturing method thereof it's about

In the recycling method of the incinerated floor ash of the present invention, after pre-treatment of the incineration floor ash discharged from the incineration process of municipal waste, it is used in a heated asphalt mixture as a substitute for fine aggregate.

A method for treating incinerated flooring for this purpose includes drying and sieving incinerated flooring discharged from the incineration process of municipal waste to separate incinerated flooring of a certain size or less; Separating the separated incinerated bottom ash by wind; And crushing and sieving the incineration floor ash separated by wind to separate incineration floor ash of a certain size or less.

Hereinafter, the preferred treatment method is described in detail for each step.

(1) drying and sieving step

Remove the moisture contained in the incineration floor ash discharged from the incineration process of municipal waste, and screen the incineration floor ash from which the moisture has been removed to separate the incineration floor ash having a size of less than a certain size, preferably 30 mm or less.

By sieving, it is possible to easily separate and recover bulky metal materials that are hardly combusted in the incineration process of municipal waste.

(2) wind power sorting step

The aluminum foil components contained in the incineration floor ash are removed by wind power sorting of the incineration floor ash of a certain size or less separated in the sieving step.

Most of the components of the incinerated bottom ash are inorganic materials suitable as a substitute for fine aggregate, but some aluminum foil remains, and aluminum foil has a significantly lower specific gravity than inorganic materials, so it can be separated and recovered by gravity separation by wind power.

When selecting wind power, it is preferable to adjust the speed of the wind to 5 to 10 m/sec.

(3) grinding and sieving step

In the wind power sorting step, the incinerated bottom ash from which the aluminum foil component is removed is pulverized and screened to a certain size or less, preferably 6 mm or less. Burnt bottom ash with a size of 6 mm or less is suitable for use as a substitute for fine aggregate in hot asphalt mixtures.

Incinerated bottom ash pretreated as above can be used as a substitute for fine aggregate in hot asphalt mixtures.

The hot asphalt mixture of the present invention includes pretreated incinerated flooring instead of fine aggregate in the hot asphalt mixture including aggregate, fine aggregate, filler, and hot asphalt. The pretreated incineration floor ash can replace 10 to 100% by weight of the fine aggregate usage.

The method for producing the heated asphalt mixture of the present invention,

Mixing the pretreated incinerated floor ash with aggregate or aggregate and fine aggregate; heating the mixture; Sifting and weighing the heated mixture; Mixing the filling material; and mixing the hot asphalt.

Hereinafter, a preferred method for each step will be described in detail.

(1) Mixing step of aggregate, fine aggregate and incinerated bottom ash

The incinerated floor ash pretreated in the above manner is transferred to the storage of aggregate/fine aggregate and mixed with aggregate or aggregate and fine aggregate.

Aggregates and fine aggregates are basic materials constituting the heated asphalt mixture, and general aggregates and fine aggregates commonly used in hot asphalt mixtures may be used.

As the aggregate, both natural aggregate and artificial aggregate may be used, and natural aggregate may be preferably used. Natural aggregates can be mainly gravel and sand collected from rivers, mountains and seas. Aggregate may be used by selecting an appropriate particle size according to the purpose of the heated asphalt mixture and using a single aggregate or a mixture of two or more types of aggregate.

It is preferable to use 13 mm aggregate for the hot asphalt mixture for the surface layer, and it is preferable to use a mixture of 20 mm aggregate and 13 mm aggregate for the hot asphalt mixture for the middle layer, and 25 mm aggregate and 13 mm aggregate for the hot asphalt mixture for the base layer. It is preferable to use them in combination.

Fine aggregate is one of the classifications according to the particle size of the aggregate. According to the Korean Industrial Standard, it passes through a 10 mm sieve and almost all of a 5 mm sieve, and is generated by natural collapse and abrasion of granular rocks remaining on a 0.08 mm sieve. It is defined as artificially processed sandstone that is easy to crush, and according to the dictionary of building structure terminology, it is defined as an aggregate that passes more than 85% of the standard net (5) mm) of concrete aggregates.

Both natural and artificial aggregates can be used as fine aggregate. Sand can be used as the natural aggregate, and sand-sized particles not made in nature such as steel slag, blast furnace slag, fine aggregate obtained by crushing steelmaking slag, and fine aggregate produced from recycled aggregate can also be used as the artificial aggregate. Preferably, natural aggregates such as sand are used.

Fine aggregate and incinerated bottom ash are preferably mixed in a weight ratio of 0 to 9:1 to 10.

It is preferable to mix 'aggregate' and 'mixture of fine aggregate and incineration floor ash replacing it' in a weight ratio of 44-64:34-50. Therefore, it is preferable to mix aggregate, fine aggregate, and floor incineration ash in a weight ratio of 44 to 64:0 to 45:5 to 50.

(2) Heating step of mixture of aggregate, fine aggregate and burnt bottom ash

The mixture of the mixed aggregate, fine aggregate, and incinerated bottom ash is heated to 170 to 190° C. to remove moisture and maintain a temperature suitable for mixing with the heated asphalt.

(3) Sifting and weighing step of aggregate, fine aggregate and incinerated bottom ash mixture

The particle size distribution of the aggregate/fine aggregate/incineration floor mixture heated to 170~190℃ is sieved to precisely control the particle size to meet the quality standard value according to the use of heated asphalt such as for surface layer, intermediate layer, and base layer, and input amount Weigh to keep precise.

The standard particle size distribution of the asphalt mixture according to the use and the particle size distribution of the aggregate, fine aggregate, incinerated flooring, and filler mixed to prepare the asphalt mixture according to the use are shown in Table 1 below. The values in Table 1 below represent the percentage (%) of the passing mass.

Particle size (mm)
item 50 40 30 25 20 13 10 5 2.5 0.6 0.3 0.15 0.08 surface layer
asphalt mixture
standard particle size range 100 90
~
100 76
~
90 44
~
74 28
~
58 11
~
32 5
~
21 3
~
15 2
~
10 for the middle layer
asphalt mixture
standard particle size range 100 90
~
100 70
~
90 60
~
80 35
~
55 20
~
35 11
~
23 5
~
16 4
~
12 2
~
7 for base layer
asphalt mixture
standard particle size range 100 100 95
~
100 80
~
100 55
~
90 46
~
80 40
~
70 28
~
55 19
~
42 7
~
26 4
~
19 2
~
13 One
~
7 13mm aggregate 100 61.1 7.4 2.2 20mm aggregate 100 50.8 30.9 2.2 25mm aggregate 100 64.5 35.3 11.1 2.3 fine aggregate 100 98.0 76.0 38 22 14 8 floor ash 100 99.7 79.8 27 9.6 2.8 0.9 Filler 100 98.5 85.2

(4) Filling material mixing step

As described above, the filler having the particle size distribution shown in Table 1 is mixed with the aggregate/fine aggregate/incinerated flooring mixture whose particle size distribution is adjusted to the standard according to the use.

The filling material functions to prevent peeling of the asphalt mixture and prevents aging, and minerals such as lime, silica, and iron oxide are used.

It is preferable to mix the aggregate/fine aggregate/incinerated flooring mixture and the filler in a weight ratio of 94-98:2-6.

(5) Mixing step of heated asphalt

Finally, asphalt at 170 ~ 190 ℃ is added and mixed. This gives the final product, the heated asphalt mixture.

The heated asphalt mixture using aggregate/fine aggregate/incineration floor ash/filler as materials is heated in consideration of the particle size of the materials included to meet the required synthetic particle size standard. It is desirable to determine the mixing ratio of asphalt. In general, it is preferable to mix aggregate/fine aggregate/incinerated flooring/filling material in an amount of 1 to 20 parts by weight, more preferably 2 to 10 parts by weight, based on 100 parts by weight of the mixture.

In a preferred embodiment of the present invention, the heated asphalt mixture for the surface layer is mixed with 13 mm aggregate, fine aggregate, floor incineration ash and filling material in a weight ratio of 46:30 to 45:5 to 20:4.

In another preferred embodiment, the heated asphalt mixture for the surface layer is mixed with 13 mm aggregate, fine aggregate, floor incineration ash and fill material in a weight ratio of 44:0 to 10:40 to 50:6.

In another preferred embodiment, the heated asphalt mixture for the surface layer is mixed with 13 mm aggregate, fine aggregate, floor incinerator and fill material in a weight ratio of 45:11 to 30:20 to 39:5.

In a preferred embodiment, the heated asphalt mixture for the intermediate layer is a mixture of 20 mm aggregate, 13 mm aggregate, fine aggregate, burnt flooring and fill in a weight ratio of 35:22:30:10:3.

In a preferred embodiment, the heated asphalt mixture for the base layer is a mixture of 25 mm aggregate, 13 mm aggregate, fine aggregate, burnt flooring and fill in a weight ratio of 46:18:24:10:2.

The heated asphalt mixture obtained as described above is preferably tested for particle size distribution and physical properties before shipment.

In the physical property test, a specimen is prepared using a compactor and the test is performed to confirm whether the mixture satisfies the standard particle size range for each use in Table 1 above and the quality standard values in Tables 2 and 3 below.

Table 2 below shows the quality standard values of the hot asphalt mixture for the surface layer, the middle layer and the base layer, and Table 3 shows the minimum void ratio (VMA) standard.

item Reference value for surface layer Reference value for middle layer Reference value for base layer Number of pledges (times) 50 each on both sides (75) 50 each on both sides (75) 50 each on both sides (75) Stability (N) 5,000 (7,500) or more 5,000 (7,500) or more 3,500 (5,000) or more Flow value (1/100 cm) 20 to 40 20 to 40 10 to 40 Porosity (%) 3 to 6 3 to 6 3-8 (4-6) Saturation (%) 65 to 80 65 to 80 60-75 Porosity (VMA) (%) Satisfy Table 3 Satisfy Table 3 Satisfy Table 3 Tensile Strength Ratio (TSR) 0.80 or higher - - Dynamic stability (times/mm) over 750 - -

maximum size of aggregate
(mm) Design Porosity (%) 3.0 4.0 5.0 6.0 13 13.0 14.0 15.0 16.0 20 12.0 13.0 14.0 15.0 25 11.0 12.0 13.0 14.0 30 10.5 11.5 12.5 13.5 40 10.0 11.0 12.0 13.0

When the incineration floor ash of 6 mm or less obtained by pre-treatment of the incineration ash generated in the incineration process of urban waste of the present invention is used as a substitute for fine aggregate in the heated asphalt mixture, the heated asphalt mixture obtained is the standard particle size range and quality standard value according to the purpose was confirmed to be satisfied.

The present invention will be described in more detail through the following examples. These examples are illustrative of the present invention, but the scope of the present invention is not limited thereto.

<Production Example 1>

The moisture contained in the incineration bottom ash discharged from the incineration process of municipal waste was removed.

The incineration bottom ash from which moisture was removed was sieved to separate incineration bottom ash having a size of 30 mm or less and bulky metal materials.

The incineration floor ash with a size of 30 mm or less separated by sieving was separated by air to separate and remove the aluminum foil components contained in the incineration floor ash.

The incineration floor ash from which the aluminum foil component was removed was pulverized and sieved to a size of 6 mm or less to obtain an incineration floor ash having a size of 6 mm or less.

<Example 1>

Preparation of heated asphalt mixture for surface layer

46% by weight of 13 mm aggregate, 30% by weight of fine aggregate and 20% by weight of the incinerated flooring of Preparation Example 1 were mixed and the mixture of the aggregate, fine aggregate and incinerated flooring was heated to 170 to 190 ° C. to remove moisture. 4% by weight of the filler was mixed with the aggregate/fine aggregate/incinerated flooring mixture heated to 170-190°C.

A heated asphalt mixture for the surface layer was prepared by adding 6.5 parts by weight of asphalt at 145 to 165 ° C. based on 100 parts by weight of the aggregate/fine aggregate/incinerated flooring/filling mixture and mixing.

<Example 2>

Preparation of heated asphalt mixture for surface layer

Except for mixing 46% by weight of aggregate, 20% by weight of fine aggregate, and 30% by weight of the incinerated flooring of Preparation Example 1, and mixing 7 parts by weight of heated asphalt with respect to 100 parts by weight of the aggregate/fine aggregate/incinerated flooring/filling mixture A heated asphalt mixture for the surface layer was prepared in the same manner as in Example 1.

<Example 3>

Preparation of heated asphalt mixture for surface layer

44% by weight of aggregate, 10% by weight of fine aggregate, 40% by weight of incinerated flooring of Preparation Example 1 and 6% by weight of filler were mixed, and 7.5 parts by weight of heated asphalt was mixed with respect to 100 parts by weight of the aggregate/fine aggregate/incinerated flooring/filling mixture. A heated asphalt mixture for the surface layer was prepared in the same manner as in Example 1 except for one.

<Example 4>

Preparation of heated asphalt mixture for surface layer

Without using fine aggregate, 44% by weight of aggregate, 50% by weight of incinerated flooring of Production Example 1 and 6% by weight of filler were mixed, and 8.0 parts by weight of heated asphalt was added to 100 parts by weight of the aggregate/fine aggregate/incinerated flooring/filling mixture. A heated asphalt mixture for the surface layer was prepared in the same manner as in Example 1, except for mixing.

<Example 5>

Preparation of heated asphalt mixture for intermediate layer

35% by weight of 20mm aggregate, 22% by weight of 13mm aggregate, 30% by weight of fine aggregate, 10% by weight of incinerated flooring and 3% by weight of filling material of Preparation Example 1 were mixed, and 100 parts by weight of the aggregate/fine aggregate/incinerated flooring/filling mixture A heated asphalt mixture for the intermediate layer was prepared in the same manner as in Example 1, except that 5.0 parts by weight of the heated asphalt was mixed with respect to the mixture.

<Example 6>

Preparation of heated asphalt mixtures for substrate

46% by weight of 25mm aggregate, 18% by weight of 13mm aggregate, 24% by weight of fine aggregate, 10% by weight of incinerated flooring and 2% by weight of filler of Preparation Example 1 were mixed, and 100 parts by weight of the aggregate/fine aggregate/incinerated flooring/filling mixture A heated asphalt mixture for the base layer was prepared in the same manner as in Example 1, except that 4.2 parts by weight of the heated asphalt was mixed with respect to the mixture.

<Experimental Example 1>

The heated asphalt mixture for the surface layer of Example 1 (46% by weight of aggregate, 30% by weight of fine aggregate, 20% by weight of incinerated flooring and 4% by weight of filler) and the heated asphalt mixture for the surface layer of Example 2 (46% by weight of aggregate, 20% by weight of fine aggregate) %, 30% by weight of incinerated bottom ash and 4% by weight of filler) were confirmed for particle size distribution. The particle size of the heated asphalt mixture is the particle size value obtained by taking the asphalt mixture, extracting the asphalt, and sieving the remaining sample.

The results are shown in Table 4 below, and the values in Table 4 represent the percentage (%) of the passing mass.

Particle size (mm)
item 20 13 10 5 2.5 0.6 0.3 0.15 0.08 Asphalt mixture for surface layer
standard particle size 100 90 to 100 76-90 44~74 28-58 11~32 5 to 21 3 to 15 2 to 10 Particle size distribution of Example 1 100 100 82.1 56.7 43.8 20.8 12.5 8.7 6.0 Particle size distribution of Example 2 100 100 82.5 57.8 45.1 20.7 12.3 8.6 6.1

In addition, the physical properties of the heated asphalt mixture for surface layer of Example 1 and the heated asphalt mixture for surface layer of Example 2 were measured, and the results are shown in Table 5 below.

The stability and flow values are measured by immersing the asphalt mixture specimen in a water bath at 60 ° C for 30 minutes, and then performing a test on the Marshall stability compressor to determine the load (N) and flow value (change value) when the specimen is destroyed by applying a load. saved For the porosity, the volume occupied by the voids out of the volume of the specimen was expressed as a percentage by substituting the density value of the specimen produced after the test specimen was prepared by taking the asphalt mixture and the theoretical density test was conducted with the same mixture. Saturation was expressed as a percentage of the volume occupied by the asphalt in the aggregate voids of the asphalt mixture specimen. The porosity was expressed as a percentage of the volume of the asphalt mixture specimen excluding the aggregate volume, that is, the volume occupied by the voids and the asphalt, relative to the total volume of the mixture. The tensile strength ratio (TSR) is the ratio of the indirect tensile strength of an asphalt mixture specimen in a dry state to the indirect tensile strength after moisture saturation. Dynamic stability was expressed as a change value in which plastic deformation occurs after preparing a specimen of the test asphalt mixture and creating an environment like a real road with a dynamic stability tester.

item Example 1 Example 2 Reference value for surface layer Stability (N) 10,467 9,653 5,000 (7,500) or more Flow value (1/100 cm) 33 31 20 to 40 Porosity (%) 4.3 4.4 3 to 6 Saturation (%) 77.3 77.7 65 to 80 Porosity (VMA) (%) 18.9 19.9 14 to 15 or more Tensile Strength Ratio (TSR) 0.83 0.81 0.80 or higher Dynamic stability (times/mm) 2,134 2,219 over 750

From the results of Tables 4 and 5, it can be confirmed that the heated asphalt mixture for surface layer prepared using the incinerated flooring material of the present invention as a substitute for fine aggregate satisfies the standard particle size range and quality standard value of the heated asphalt mixture for surface layer.

<Experimental Example 2>

The heated asphalt mixture for the surface layer of Example 3 (44% by weight of aggregate, 10% by weight of fine aggregate, 40% by weight of incinerated flooring and 6% by weight of filler) and the heated asphalt mixture for surface layer of Example 4 (44% by weight of aggregate, 50% by weight of incinerated flooring) The particle size distribution of the weight% and the filler 6% by weight) was confirmed, and the results are shown in Table 6 below. The values in Table 6 represent the percentage (%) of the passing mass.

Particle size (mm)
item 20 13 10 5 2.5 0.6 0.3 0.15 0.08 Asphalt mixture for surface layer
standard particle size 100 90 to 100 76 to 90 44~74 28-58 11~32 5 to 21 3 to 15 2 to 10 Particle size distribution of Example 3 100 100 82.9 58.9 46.5 20.6 12.0 8.4 6.3 Particle size distribution of Example 4 100 100 82.9 59.1 46.9 19.5 10.8 7.3 5.6

In addition, the physical properties of the heated asphalt mixture for surface layer of Example 3 and the heated asphalt mixture for surface layer of Example 4 were measured, and the results are shown in Table 7 below.

item Example 3 Example 4 Reference value for surface layer Stability (N) 9,940 11,283 5,000 (7,500) or more Flow value (1/100 cm) 34 36 20 to 40 Porosity (%) 4.4 4.6 3 to 6 Saturation (%) 78.8 79.0 65 to 80 Porosity (VMA) (%) 20.7 22.1 14 to 15 or more Tensile Strength Ratio (TSR) 0.84 0.85 0.80 or higher Dynamic stability (times/mm) 2,032 2,328 over 750

From the results of Tables 6 and 7, it can be confirmed that the heated asphalt mixture for surface layer prepared using the incinerated flooring material of the present invention as a substitute for fine aggregate satisfies the standard particle size range and quality standard value of the heated asphalt mixture for surface layer. In particular, the physical properties of the heated asphalt mixture for the surface layer of Example 4, in which only incinerated flooring was used without using fine aggregate, sufficiently satisfied the standard particle size range and quality standard value. Therefore, the incinerated floor ash of the present invention can completely replace fine aggregate in heated asphalt mixtures.

<Experimental Example 3>

The particle size distribution of the heated asphalt mixture for the intermediate layer of Example 5 (35% by weight of 20mm aggregate, 22% by weight of 13mm aggregate, 30% by weight of fine aggregate, 10% by weight of incinerated flooring and 3% by weight of filler) was confirmed, and the results It is shown in Table 8 below. The values in Table 8 represent the percentage (%) of the passing mass.

Particle size (mm)
item 25 20 13 10 5 2.5 0.6 0.3 0.15 0.08 Asphalt for intermediate layer
standard particle size of the mixture 100 90 to 100 70-90 60-80 35 to 55 20 to 35 11~23 5 to 16 4 to 12 2-7 Particle size distribution of Example 5 100 100 82.8 67.3 44.8 34.3 17.1 10.6 7.4 5.0

In addition, the physical properties of the heated asphalt mixture for the intermediate layer of Example 5 were measured, and the results are shown in Table 9 below.

item Example 5 Reference value for middle layer Stability (N) 9,620 5,000 (7,500) or more Flow value (1/100 cm) 36 20 to 40 Porosity (%) 5 3 to 6 Saturation (%) 70 65 to 80 Porosity (VMA) (%) 16.0 over 14 Tensile Strength Ratio (TSR) - - Dynamic stability (times/mm) - -

From the results of Tables 8 and 9, it can be seen that the heated asphalt mixture for the intermediate layer prepared using the incinerated flooring material of the present invention as a substitute for fine aggregate satisfies the standard particle size range and quality standard value of the heated asphalt mixture for the intermediate layer.

<Experimental Example 4>

The particle size distribution of the heated asphalt mixture for the base layer of Example 6 (46% by weight of 25mm aggregate, 18% by weight of 13mm aggregate, 24% by weight of fine aggregate, 10% by weight of incinerated flooring and 2% by weight of filler) was confirmed, and the results It is shown in Table 10 below. The values in Table 10 represent the percentage (%) of the passing mass.

Particle size (mm)
item 50 40 30 25 20 13 10 5 2.5 0.6 0.3 0.15 0.08 Asphalt for Base Layer
mixture
standard particle size 100 100 95
~
100 80
~
100 55
~
90 46
~
80 40
~
70 28
~
55 19
~
42 7
~
26 4
~
19 2
~
13 One
~
7 Example 6
particle size distribution 100 83.7 70.2 52.1 37.9 28.6 13.8 8.2 5.6 3.7

In addition, the physical properties of the heated asphalt mixture for the base layer of Example 6 were measured, and the results are shown in Table 11 below.

item Example 6 Reference value for base layer Stability (N) 8,550 3,500 (5,000) or more Flow value (1/100 cm) 38 10 to 40 Porosity (%) 5 3 to 8 (4 to 6) Saturation (%) 65 60-75 Porosity (VMA) (%) 14.8 13+ Tensile Strength Ratio (TSR) - - Dynamic stability (times/mm) - -

From the results of Tables 10 and 11, it can be seen that the heated asphalt mixture for the base layer prepared using the incinerated flooring material of the present invention as a substitute for fine aggregate satisfies the standard particle size range and quality standard value of the heated asphalt mixture for the base layer.

Claims (15)

A method for recycling incinerated flooring, characterized in that the incinerated flooring ash discharged from the incineration process of municipal waste is subjected to pretreatment including drying, crushing, and sorting, and then used in a heated asphalt mixture as a substitute for fine aggregate. According to claim 1,
The pretreatment,
Drying and sieving the incineration floor ash discharged from the incineration process of municipal waste to separate incineration floor ash of a certain size or less;
Separating the separated incinerated bottom ash by wind; and
A recycling method comprising the step of crushing and sieving the incineration floor ash separated by wind to separate incineration floor ash of a predetermined size or less. Drying and sieving the incineration floor ash discharged from the incineration process of municipal waste to separate incineration floor ash of a certain size or less;
Separating the separated incinerated bottom ash by wind; and
A method of treating incineration flooring comprising the step of separating incineration flooring of a predetermined size or less by crushing and sieving the incineration flooring selected by wind. According to claim 3,
Drying and sieving the incineration floor ash discharged from the incineration process of the municipal waste to separate incineration floor ash having a size of 30 mm or less;
Separating the separated incineration bottom ash with a size of 30 mm or less by wind; and
A method of treating incinerated flooring, comprising the step of separating incinerated flooring having a size of 6 mm or less by crushing and sieving the incinerated flooring. In the hot asphalt mixture comprising aggregate, fine aggregate, filler and hot asphalt,
Substitute 10 to 100% by weight of the fine aggregate weight in the mixture for the pretreated incinerated flooring instead of the fine aggregate, but the pretreated incinerated flooring includes drying, crushing and sorting the incinerated flooring discharged from the incineration process of municipal waste A heated asphalt mixture, characterized in that obtained by treatment with a pretreatment process. According to claim 5,
The pretreated incinerated bottom ash,
A heated asphalt mixture characterized in that it has been treated by the treatment method of claim 3 or claim 4. According to claim 5,
The heated asphalt mixture, characterized in that it comprises the aggregate, fine aggregate, floor incinerator and filler in a weight ratio of 44 to 64: 0 to 45: 5 to 50: 2 to 6. According to claim 7,
The heated asphalt mixture is a heated asphalt mixture for the surface layer,
A heated asphalt mixture comprising 13 mm aggregate, fine aggregate, floor incinerator and filler in a weight ratio of 46:30 to 45:5 to 20:4. According to claim 7,
The heated asphalt mixture is a heated asphalt mixture for the surface layer,
A heated asphalt mixture comprising 13 mm aggregate, fine aggregate, floor incinerator and filler in a weight ratio of 44:0 to 10:40 to 50:6. According to claim 7,
The heated asphalt mixture is a heated asphalt mixture for the surface layer,
A heated asphalt mixture comprising 13 mm aggregate, fine aggregate, floor incinerator and filler in a weight ratio of 45:30 to 45:5 to 20:5. According to claim 7,
The heated asphalt mixture is a heated asphalt mixture for the intermediate layer,
A heated asphalt mixture comprising 20 mm aggregate, 13 mm aggregate, fine aggregate, burnt bottom material and fill material in a weight ratio of 35:22:30:10:3. According to claim 7,
The heated asphalt mixture is a heated asphalt mixture for the base layer,
A heated asphalt mixture comprising 25 mm aggregate, 13 mm aggregate, fine aggregate, incinerated flooring and fill in a weight ratio of 46:18:24:10:2. Mixing the pretreated incinerated floor ash obtained by treating the incinerated floor ash discharged from the municipal waste incineration process with a pretreatment process including drying, crushing and sorting with aggregate or aggregate and fine aggregate;
heating the mixed mixture to 170-190 °C;
sifting and weighing the heated mixture;
mixing a filler with the measured mixture; and
A method for producing a heated asphalt mixture comprising the step of mixing hot asphalt with the mixture in which the filler is mixed. According to claim 13,
The method for producing a heated asphalt mixture, characterized in that the fine aggregate and the pretreated incineration floor ash are mixed in a weight ratio of 0 to 9: 1 to 10. According to claim 13,
The method for producing a heated asphalt mixture, characterized in that the aggregate, fine aggregate, pretreated floor incinerator and filler are mixed in a weight ratio of 44 to 64: 0 to 45: 5 to 50: 2 to 6.

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