KR20050016033A - Porous sintered paving material and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A sintered porous packing material and its production method are provided to improve water permeability, water retention ability, mechanical strength and abrasion resistance, and to help solve heat island effect by being suitably placed to the wall and the rooftop of a building or construction. CONSTITUTION: The sintered porous packing material is produced by: preparing a mixture(A) for a porous water retention layer by adding water to a raw material mix comprised of 40-70wt% of a clinker ash having a particle diameter of 7mm or less, 15-30wt% of hydraulic cement and 15-30wt% of glass powder; preparing a mixture(B) for a porous reinforcing layer by adding water to a raw material mixture comprised of 50-90wt% of crushed magnetic ceramic, 5-25wt% of hydraulic cement and 5-25wt% of glass powder; layering a porous water retention layer made of the mixture(A) and a porous reinforcing layer made of the mixture(B) and molding the resulted multilayered article; curing and drying the formed article; and calcining the dried article.

Description

Porous sintered packaging and its manufacturing method {POROUS SINTERED PAVING MATERIAL AND MANUFACTURING METHOD THEREOF}

The present invention is mainly used in buildings and rivers in urban areas such as buildings, rivers, roads, parks, etc., the outer surface of the walkway and sidewalks of the park, such as the outer wall surface of the building, roofs and roofs, such as security barrier of the highway The present invention relates to a porous sintered packaging material attached to, or attached to, a road surface, and a method for manufacturing the same. Particularly, a porous material suitable as a countermeasure against heat island phenomenon having excellent water permeability and water retention property. A sintered packaging material and its manufacturing method.

In recent years, the so-called heat island phenomenon in which the temperature in urban areas becomes higher than the surrounding area is observed, and the local concentration and influence on the human body such as impairment of eyes and respiratory organs due to the occurrence of heat stroke or photochemical smog. Various problems are caused in life in urban areas such as the occurrence of heavy rain.

For this reason, measures to alleviate the above-mentioned heat island phenomenon have been studied. As one of them, greening and conservative paving of walls, roofs and roads of buildings and civil constructions in urban areas have been studied. .

For example, Japanese Patent No. 2,756,934 discloses 50 to 85% by weight of coal ash fly ash and clinker ash in total, and clay raw materials such as wood cutting clay, and the like. 15-30 weight% of hydraulic cements, such as a blast furnace cement, in total in total (However, a hydraulic cement is combined in the quantity of 0.3-0.5 weight part with respect to 1 weight part of clay raw materials), and blast furnace material ( After forming the raw material composition which consists of 0-20 weight% of sintering adjustment materials, such as slag, and drying it, it is 1000 degreeC-1200 degreeC through hydrothermal reaction by alkaline water vapor containing CaO in baking process. By firing at a temperature of, a method for producing a porous sintered body useful as a sidewalk block or vegetation substrate material having water retention and water permeability has been proposed.

However, the above method uses a mixture of fly ash having a particle size of 0.5 mm or less and clinker ash having a particle size of 0.5 to 1 mm as an aggregate, and has excellent mechanical strength (bending strength) as a packaging material, but its water permeability and permeability coefficient are relatively low. There is a problem that the water retaining property is not necessarily sufficient, and it is easy to slip due to the occurrence of moss or the like, or that the wear resistance is insufficient.

In addition, Japanese Patent No. 3,158,086 discloses a clinker ash aggregate having a particle size of 1.5 mm to 10.0 mm in a weight ratio of 45% to 80%, and a porous crystallized glass component composed of soda lime glass and hydraulic cement in a weight ratio of 20% to 55%. It is made of%, and the moisture for molding is added in the range of 10% to 25% by weight based on the blending amount of these compounding materials, followed by mixing, and then the cured reaction process for 20 minutes to 60 minutes is performed. Filled in a mold for vibration molding through, and molded into a flat plate or block shape in the range of the molding surface pressure 5kg / cm ² ~ 30kg / cm ² , and curing the molded body and dried, the temperature range of 1000 ℃ ~ 1200 ℃ A method for producing a granulated sintered body having pores of continuous bubbles, which is useful as water-permeable and water-retaining materials, filtration materials, purification materials, sound-absorbing materials, vegetation materials, etc., by firing at water is proposed.

In the present method, however, the clinker ash having a particle size of 1.5 mm to 10.0 mm is used as an aggregate, and the water absorption rate and the permeability coefficient are relatively high, since the aggregate particles have voids of 100 μm (0.1 mm) to 5000 μm (5 mm). Although it has excellent properties and maintainability, its mechanical strength (bending strength) is low, and it is always suitable for paving material on road trails and sidewalks in parks where loads such as humans climb on it during use. Can not.

Moreover, none of these conventional porous sintered bodies has abrasion resistance in that they use a relatively soft clinker ash discharged from a coal-fired power plant as a main aggregate component. Since hydraulic cement is used as a binder for aggregates, the cement component is gradually eluted at the time of use, and the so-called whitening phenomenon occurs in which white powdery residue is formed on the surface of the packaging material. There is also a problem that occurs.

The object of the present invention is not only excellent in permeability and water retention, but also excellent in mechanical strength and abrasion resistance, no whitening phenomenon, and suitable for laying or attaching to walls, roofs, road surfaces, etc. in various buildings and civil constructions. In addition, the present invention provides a porous sintered packaging material which is also useful as a countermeasure against heat island phenomenon.

Another object of the present invention is not only excellent in permeability and water retention, but also excellent in mechanical strength and abrasion resistance, and suitable for laying on or attaching to a wall, a roof, a road, etc. in various buildings and civil constructions. The present invention provides a method for producing a porous sintered packaging material which is also useful as a countermeasure.

Accordingly, the present inventors have diligently studied to develop a packaging material not only excellent in permeability and water retention required as a countermeasure against heat island phenomenon but also excellent in mechanical strength and abrasion resistance required as a packaging material. By forming a porous sintered body having a multilayer structure of a porous repair layer made of aggregate and a porcelain ceramic ground material having a particle diameter of 6 mm or less with a porous reinforcement layer made of aggregate, it has a large number of pores of 0.1 to 100 μm and has excellent repair performance. The present invention was found to be able to provide excellent mechanical strength and wear resistance without impairing the properties of the clinker ash exhibiting the present invention, and to be particularly suitably used as a packaging material for inhibiting heat island phenomenon.

That is, the present invention is a porous sintered packaging material composed of a porous sintered body obtained by adding and mixing addition water to a raw material mixture composed of aggregate, hydraulic cement, and glass powder, molding into a predetermined shape, and firing the obtained molded product. A porous sintered body having a multilayer structure in which the porous sintered body comprises a porous repair layer having aggregates of clinker ash having a particle diameter of 7 mm or less and a ceramic ceramic crushed product having a particle size of 6 mm or less having an aggregate is laminated with the porous reinforcing layer as a surface layer and such a porous material. Provided is a porous sintered packaging made of a sintered body.

In addition, the present invention is added to the raw material mixture consisting of 40 to 70% by weight of clinker ash having a water content of 5 to 20% by weight and a particle diameter of 7 mm or less, 15 to 30% by weight of hydraulic cement and 15 to 30% by weight of glass powder having a particle diameter of 2 mm or less. Water was added to adjust the water content including clinker ash-containing water to 10 to 20% by weight, and the raw material mixture and the added water were mixed to prepare a mixture for the porous water-retaining layer, and the ceramic ceramic powder having a particle diameter of 6 mm or less. Addition water is added to a raw material mixture composed of 50 to 90% by weight, 5 to 25% by weight of hydraulic cement and 5 to 25% by weight of glass powder having a particle diameter of 2 mm or less to adjust the water content to 5 to 15% by weight. And mixing the additive water to prepare a mixture for the porous reinforcing layer, and curing the multilayered molding obtained by laminating the mixture for the porous water-retaining layer and the mixture for the porous reinforcing layer, and then curing the mixture to 1000-120. It is a manufacturing method of the porous sintered packaging material baked at 0 degreeC.

The porous sintered packaging material of the present invention has a porous repair layer comprising aggregates of clinker ash having a particle size of 7 mm or less and a porous reinforcing layer containing aggregates of magnetic ceramic crushed particles having a particle size of 6 mm or less, wherein the porous reinforcement layer has a multilayered structure laminated as a surface layer. It is a porous sintered body, exhibits excellent water retention by the porous water-retaining layer, and exhibits the mechanical strength and excellent abrasion resistance required as a packaging material by the porous reinforcing layer, and is a porous sintered body made of aggregate, hydraulic cement, and glass powder as raw materials. The excellent permeability required is exerted.

Here, in regard to the multilayer structure of the porous sintered body of the present invention, at least the porous reinforcement layer may be laminated as the surface layer, for example, a two-layer structure may be used in which the porous repair layer is used as the base layer and the porous reinforcement layer is the surface layer. The three-layer structure sandwiched between the porous reinforcing layers in the form of a sandwich may be sufficient, or a multilayer structure of four or more layers in which the porous repair layer and the porous reinforcing layer are alternately laminated.

In the porous sintered packaging material of the present invention, the thickness of the porous water-retaining layer and the porous reinforcing layer forming the multilayered structure depends on the overall thickness, water-retaining performance and mechanical strength required for the packaging material of the required product, and the like. Regarding the ratio of the thickness of the porous reinforcing layer, considering the balance between the repair performance and the mechanical strength in the packaging material of the product, the ratio (T / D) of the thickness (T) of the porous repair layer to the thickness (D) of the porous reinforcing layer is usually used. 3-11, Preferably it is the range of 5-10.

In the present invention, in producing a porous sintered packaging material, the clinker ash used as a raw material for forming a porous repair layer of the porous sintered compact has a water content of 5 to 20% by weight, and a particle diameter obtained by sieving and cutting a large particle size. 7 mm or less, preferably 3 mm or less is used. If the particle diameter is larger than 7 mm, the mechanical strength is insufficient, and the voids between the clinker ash particles become large, so that the water retention is also lowered.

In addition, the hydraulic cement blended with the clinker ash as a raw material for forming a porous repair layer may include, for example, blast furnace cement, portland cement, fly ash cement, alumina cement, white cement, and the like. Only a species can be used individually, and 2 or more types may be mixed and used for it. As for the hydraulic cement, it is preferable to use blast furnace cement from the viewpoint of economical efficiency, recycling properties, and the like.

In addition, the glass powder blended as a raw material for forming a porous water-retaining layer together with the clinker ash and the hydraulic cement is melted at the time of firing, and these aggregate particles are mixed with the hydraulic cement to form voids between the particles of the aggregate (clinker ash). The liver is partially bonded, and specifically, 2 mm or less, preferably 0.6 mm or less, formed by pulverizing waste glass (soda lime glass) such as plate glass or bottle glass is used.

The clinker ash, hydraulic cement and glass powder is 40 to 70% by weight, preferably 55 to 65% by weight, 15 to 30% by weight hydraulic cement, preferably about 20% by weight, and 15 to 30 glass powder. It is mix | blended in the ratio of about 20 weight% by weight, Preferably it is set as the raw material mixture for forming a porous repair layer. As for the clinker ash, if the blending ratio is lower than 40% by weight, the desired water-retaining layer cannot be obtained. On the contrary, if it is higher than 70% by weight, the mechanical strength is insufficient, and in the case of hydraulic cement, the blending ratio is lower than 15% by weight. If it is higher than 30% by weight, the water-retaining property is lowered. On the contrary, if it is higher than 30% by weight, the water-retaining property is lowered. Degrades.

Regarding the raw material mixture for forming the porous water-retaining layer thus obtained, next, water is added to adjust the water content including clinker ash-containing water to 10 to 20% by weight, mixed, and molded into a predetermined shape. However, at this time, the mixing of the raw material mixture and the added water is not particularly limited as long as it is a mixer capable of mixing them sufficiently, for example, a hand mixer, a biaxial mixer, a tilt mixer, a fan mixer, or the like. High speed mixing mixer (Eirich mixer from EIRICH) equipped with rotating fan, fixed wall scraper and agitator or diffusion mixing mixer without stirring blade (Chiyoda KITECH Co., Ltd.) And OmniMixer (manufactured by 千代 田 技 硏 工業 株式會社).

In mixing the raw material mixture and the additive water for forming the porous repair layer, preferably, the additive water is gradually added to be sufficiently mixed to make the whole uniform, to prepare a mixture for the porous repair layer.

On the other hand, when producing a porous sintered packaging material, the magnetic ceramic pulverized product used as a raw material for forming the porous reinforcing layer of the porous sintered compact is, for example, pulverized defective products such as sanitary ware, tiles, tableware, and the like. A particle size of 6 mm or less, preferably 0.5-4 mm, obtained by separating and cutting a large particle size is used. If the particle diameter is larger than 6 mm, the mechanical strength is weak, and if it is smaller than 0.5 mm, there is a fear that the water permeability is insufficient.

The hydraulic cement and glass powder blended as a raw material for forming the porous reinforcing layer are the same as the hydraulic cement and glass powder used as raw materials for forming the porous repair layer.

The magnetic ceramic pulverized product, hydraulic cement and glass powder is 50 to 90% by weight, preferably 65 to 75% by weight, 5 to 25% by weight hydraulic cement, preferably 12 to 18% by weight, And 5 to 25% by weight of glass powder, preferably 10 to 25% by weight, to prepare a raw material mixture for forming a porous reinforcing layer. In the case of magnetic ceramic pulverized products, when the blending ratio is lower than 50% by weight, the water permeability is insufficient. On the contrary, when the blended ratio is higher than 90% by weight, the mechanical strength is insufficient. In the case of the multilayered molding, the strength of the multilayer molding becomes difficult, and conversely, when the ratio is higher than 25% by weight, the water permeability is insufficient. If it is higher than%, the water permeability is insufficient.

Also in the raw material mixture for forming the porous reinforcing layer, the water content is then added to adjust the water content to 5 to 15% by weight, and the mixture is molded into a predetermined shape. At this time, the mixture of the raw material mixture and the additive water is mixed. The mixer is not particularly limited as long as it is a mixer capable of mixing them sufficiently. For example, a hand mixer, a biaxial mixer, a tilt mixer, a fan mixer, or the like, a countercurrent high speed mixer (Irrich mixer), Diffusion-mixing mixers (OmniMixer) without stirring blades, etc. are mentioned.

In the mixing of the raw material mixture and the additive water for forming the porous reinforcing layer, preferably, the raw material mixture is first mixed at an output of about 70%, and then the total is uniform while gradually adding the additive water at an output of 100%. The mixture for the porous reinforcement layer is prepared by mixing enough to make it.

Moreover, you may add a 3rd component, such as a pigment and a fly ash, in the range which does not impair the meaning of this invention in the mixture for said porous repair layer, or the mixture for porous reinforcement layers as needed.

Next, the obtained mixture for the porous repair layer and the mixture for the porous reinforcing layer are laminated and molded to form a desired multilayer molded product.

Also in the molding method of the multilayer molded article, there is no particular limitation, for example, a method in which the mixture for the porous water-retaining layer and the mixture for the porous reinforcing layer is sequentially or repeatedly injected as many times as necessary in the mold. First, one of the mixtures for the porous water-retaining layer and the porous reinforcing layer is injected into the mold to mold the molded article, and then the operation of molding the molded article by injecting the other mixture onto the obtained molding is performed once or as necessary. The method of repeating and performing a several times can be illustrated.

These porous water-retaining layers and mixtures for porous reinforcing layers are then a predetermined shape suitable as a packaging material by means such as press molding or vibration molding, for example, a flat plate having a length of 200 to 500 mm x width of 200 to 500 mm x thickness of 20 to 100 mm. It is molded into various shapes such as a shape, a flat plate shape having irregularities on its surface, and a shape suitable for laying or attaching while forming a shape on a road surface of a park or a wall surface of a building.

Then, in the molding conditions of the mixture for these porous water-retaining layer and the porous reinforcing layer, for example, in the case of press molding, it is carried out under a surface pressure of 5 to 250 kg / cm ² , preferably 50 to 100 kg / cm ² , In addition, in the case of vibration shaping, 0.05 to 5 kg / cm ² , preferably 0.1 to 1 kg under the conditions of the normal frequency of 2000 to 6000 rpm and the amplitude of 0.2 to 1.2 mm, preferably the frequency of 3000 to 5000 rpm and the amplitude of 0.3 to 0.7 mm. It is carried out under a surface pressure of / cm ² . In the surface pressure imparted at the time of press molding or vibration molding, if it is too low, the mechanical strength is insufficient. On the contrary, if it is too high, the water retention and water permeability are insufficient.

The multilayer molding thus obtained is cured until the hydration reaction of the hydraulic cement proceeds and hardens. However, the curing of the molding at this time is preferably 8 kg / cm ² or more, more preferably 10 kg / cm. It is good to carry out until it becomes about ² , and when the bending strength of the molded object after curing is lower than 8 kg / cm <^2> , it will be easy to be broken at the time of baking, and the handling will become difficult.

The curing of the multi-layered molding may be a natural curing, which is left for 1 to 4 days, preferably 1 to 2 days after molding the mixture, and may be 3 to 4 at 30 to 80 ° C, preferably at 50 ° C. Steam curing may be performed for a period of time, preferably 3 to 4 hours, or may be performed in combination with these natural curing and steam curing.

The multilayer molded article in which the above curing has been completed and reached a predetermined bending strength is subsequently fired to form a product packaging material. Firing of the multilayer molded product is carried out under the conditions of a firing temperature of 1000 to 1200 ° C, preferably 1100 to 1200 ° C, and a firing time of 1.5 to 30 hours, preferably 2 to 4 hours, and in the firing apparatus, Any device may be used as long as the device can satisfy the firing temperature of 1000 to 1200 ° C and the firing time of 1.5 to 30 hours of firing conditions. For example, a batch formula performed by using a device such as Shuttle Kiln. This may be followed, or may be a continuous type, for example, performed using a roller hearth kiln. If the firing temperature is lower than 1000 DEG C, a small grain portion is generated and the strength of the packaging material is lowered. If the firing temperature is higher than 1200 DEG C, the entire multilayered molding is melted and the product shape cannot be maintained.

The porous sintered packaging material obtained by the method of the present invention is a sintered body having a multilayer structure in which a porous repair layer and a porous reinforcing layer are laminated, and usually have a bulk specific gravity of 1.1 to 1.5, preferably 1.2 to 1.4, flexural strength (JIS A 5411 mutatis mutandis). Dry state) 3 to 8 N / mm ² , preferably 3 to 5 N / mm ² , water absorption (JIS A 5209 mutatis mutandis, volume conversion) 15 to 40 vol%, preferably 25 to 35 vol%, water permeability (interlocking) Block association method) 0.03 × 10 ^-2 to 2.5 × 10 ^-2 cm / S, preferably 0.3 × 10 ^-2 to 2.5 × 10 ^-2 cm / S, and wear resistance (JIS A 5209) 0.1 g or less, preferably It is 0.05g or less, and it does not generate whitening phenomenon by the cement component dissolution test carried out in the same manner as the outdoor exposure test by installing in the outdoor.

According to the present invention, it is excellent not only in permeability and water retention, but also in mechanical strength and abrasion resistance, and is suitable for laying or attaching to walls, rooftops, road surfaces, etc. in various buildings and civil engineering buildings, and preventing heat island phenomenon. A porous sintered packaging material which is also useful as a solvent can be provided, and a method for producing the same can be provided.

Embodiments suitable for the present invention will be specifically described based on Examples and Comparative Examples.

[Examples 1-10]

Crusher ash having a particle size of 3 mm or less (with and around water content of 10wt%), a blast furnace cement class B, and waste glass (manufactured by Sanwa Chemical Co., Ltd.), each of which was cut into a sieve and exceeded a particle diameter of 3 mm and cut, was separated into a sieve. Glass powder having a particle size of 0.6 mm or less, which cut off the one exceeding 0.6 mm, was blended in the ratio shown in Table 1 to obtain a raw material mixture for the porous water-retaining layer.

The raw material mixture for the porous water-retaining layer was added to a countercurrent high speed mixing mixer (Irrich mixer) apparatus at the ratio shown in Table 1, mixed without first adding the added water, and then the water content, including water in the clinker ash, was increased. Addition water was added gradually so that it might become about 15 weight%, and it fully mixed, and obtained the mixture for porous repair layers.

Magnetic ceramic pulverized product (trade name: Selben 8 Me, manufactured by Morishita Seizuchi Co., Ltd.) and the same blast furnace cement And the same glass powder as the above was mix | blended in the ratio shown in Table 1, and it was set as the raw material mixture for porous reinforcement layers.

The raw material mixture for the porous reinforcing layer was introduced into a diffusion mixing mixer (omni mixer) without stirring blades at the ratios shown in Table 1, mixed at 70% output without first adding water, and then at 100% output. The addition water was added slowly so that the water content might be about 10% by weight, and then sufficiently mixed to obtain a mixture for the porous reinforcing layer.

Next, the mold of the press molding machine (manufactured by Kototek Kosho Co., Ltd.) was first filled with the mixture for the porous repair layer in the amount shown in Table 1, and then the mixture for the porous reinforcing layer in the amount shown in Table 1 thereon. Was filled, vibrated under conditions of a surface pressure of 50 kg / cm ² , and formed into a flat plate having a length of 300 mm × 300 mm × 60 mm in thickness.

The obtained multilayered molded product was taken out of the mold together with the pallet, and left for 4 days to cure by natural curing. Curing of the molding was carried out with the aim of giving a bending strength of about 10 kg / cm ² .

Next, the cured multilayer molded product was subjected to a firing temperature of 1100 to 1200 ° C., firing time (holding time of firing temperature) 5 to 30 minutes, firing rate of 200 to 250 mm / min, and lifting temperature rate of 2 to 10 using a Laura Herskillen. It baked on the conditions of ° C / min, and obtained the porous sintered packaging materials of Examples 1 to 10.

As for the porous sintered packaging material of each of Examples 1-10 obtained, the ratio of the thickness of the porous repair layer and the porous reinforcement layer was as showing in Table 1.

Regarding the porous sintered packaging materials obtained in Examples 1 to 10, the bulk specific gravity, the bending strength (JIS A 5411 mutatis mutandis, air dried state), the water absorption (JIS A 5209 mutasil, volume conversion), and the water permeability (interlocking block association method ), And wear resistance (JIS A 5029) were measured.

Moreover, about the porous sintered packaging material of each Example 1-10, the cement component elution test was carried out in the same manner as the outdoor exposure test, and the presence or absence of the appearance of whitening phenomenon was evaluated, and it evaluated in the next three steps. (Double-circle): Whitening phenomenon is not recognized, (circle): Whitening phenomenon is seen slightly, and b: Whitening phenomenon is seen considerably.

Table 1 shows the evaluation results of physical properties and whitening phenomenon expression of the measured porous sintered packaging materials of Examples 1 to 10.

Example 11

A porous sintered packaging material of Example 11 was obtained in the same manner as in Example 6, except that the clinker ash had a particle size of 3 to 5 mm.

About the porous sintered packaging material of obtained Example 11, the physical property was measured similarly to the case of each said Examples 1-10, and the whitening phenomenon expression was evaluated.

The results are shown in Table 1.

Comparative Example 1

Using only the mixture for porous repair layers having the same composition as in Example 6, the porous sintered packaging material of Comparative Example 1 was obtained in the same manner as in Example 6.

About the obtained porous sintered packaging material of the comparative example 1, the physical property was measured similarly to the case of said each Example, and the expression of the whitening phenomenon was evaluated.

The results are shown in Table 2.

 Comparative Example 2

Using only the mixture for the porous reinforcing layer having the same composition as in Example 6, the porous sintered packaging material of Comparative Example 2 was obtained in the same manner as in Example 6.

About the obtained porous sintered packaging material of the comparative example 2, the physical property was measured similarly to the case of each said Example, and the expression of the whitening phenomenon was evaluated.

The results are shown in Table 2.

Comparative Example 3

A porous sintered packaging material of Comparative Example 3 was obtained in the same manner as in Example 6 except that a clinker ash having a particle size of more than 7 mm and 12 mm or less was used.

About the porous sintered packaging material of Comparative Example 3 obtained, the physical properties thereof were measured in the same manner as in the case of each of the above Examples, and the expression of whitening phenomenon was evaluated.

The results are shown in Table 2.

[Comparative Example 4]

A porous sintered packaging material of Comparative Example 4 was obtained in the same manner as in Example 6, except that the magnetic ceramic pulverized product had a particle diameter greater than 6 mm and 10 mm or less.

About the obtained porous sintered packaging material of the comparative example 4, the physical property was measured similarly to the case of said each Example, and the whitening phenomenon expression was evaluated.

The results are shown in Table 2.

As shown in Table 1, the porous sintered packaging materials of Examples 1 to 11 manufactured according to the present invention have a surface pressure, thickness ratio, volume specific gravity, flexural strength, water absorption, water permeability, wear resistance, and evaluation results of bleaching during molding. It can be seen that all are within the preferred range. However, in Comparative Example 1, the wear resistance was not good, and the whitening phenomenon appeared significantly. In Comparative Example 2, in the values of bulk specific gravity, bending strength, and water absorption, Comparative Example 3 and Comparative Example 4 had a preferable range in bending strength. You can see that it is out of the way.

The porous sintered packaging material of the present invention is not only excellent in permeability and water retention, but also excellent in mechanical strength and abrasion resistance, and is suitable for laying or attaching the wall, roof, road surface, etc., in various buildings and civil constructions, in particular heat island. It is useful as a countermeasure against the phenomenon.

Moreover, the method of this invention is a method suitable for industrially manufacturing the porous sintered packaging material useful as a countermeasure against such heat island phenomenon.

Claims (12)

Preparing a mixture (A) for the porous water-retaining layer by mixing the additive water with a raw material mixture composed of 40 to 70% by weight of clinker ash having a particle diameter of 7 mm or less, 15 to 30% by weight of hydraulic cement, and 15 to 30% by weight of glass powder; Preparing a mixture (B) for the porous reinforcing layer by mixing the additive water with a raw material mixture consisting of 50 to 90% by weight of a ceramic ceramic powder having a particle diameter of 6 mm or less, 5 to 25% by weight of hydraulic cement, and 5 to 25% by weight of glass powder. ; Stacking and molding a porous repair layer made of the mixture for the porous repair layer and a porous reinforcement layer made of the mixture for the porous reinforcement layer; Curing drying the obtained multilayer molding; And Firing the obtained dried product; Method for producing a porous sintered packaging material comprising a. The method of claim 1, In the manufacturing step of the mixture (A) for the porous water-retaining layer, water content including clinker ash-containing water is adjusted by adding addition water so as to be 10 to 20% by weight based on the weight of the mixture (A), In the production step of the mixture (B) for the porous reinforcing layer, the addition of water is added to adjust the water content to 5 to 15% by weight based on the weight of the mixture (B) Method for producing a porous sintered packaging material. The method of claim 1, The glass powder used in the mixture for porous repair layer (A) and the mixture for porous reinforcing layer (B) has a particle diameter of 2 mm or less. Method for producing a porous sintered packaging material. The method of claim 1, The molding is performed by sequentially injecting the mixture for porous repair layer (A) and the mixture for porous reinforcement layer (B) in the mold, or after injecting a mixture of any one of the mixture (A) and the mixture (B) first. Forming the molding by injecting a mixture of the other on one molding Method for producing a porous sintered packaging material. The method of claim 1, The molding is 5 ~ 250kg / cm ² By press molding under a surface pressure of Method for producing a porous sintered packaging material. The method of claim 1, The molding is 0.05 ~ 5kg / cm ² Performed by vibratory molding under the surface pressure of Method for producing a porous sintered packaging material. The method of claim 1, The firing is carried out at 1000 ~ 1200 ℃ Method for producing a porous sintered packaging material. As a porous sintered body obtained by adding and mixing addition water to a raw material mixture consisting of aggregate, hydraulic cement, and glass powder, shaping to a predetermined shape, and then firing, The porous sintered body includes a porous repair layer comprising aggregates of clinker ash having a particle size of 7 mm or less, and a porous reinforcing layer comprising aggregates of ceramic ceramics having a particle size of 6 mm or less, wherein the porous repair layer and the porous reinforcement layer are laminated in a multilayer structure. Made up Porous Sintered Body. The method of claim 8, The raw water mixture for the porous water-retaining layer is composed of 40 to 70% by weight of clinker ash having a particle diameter of 7 mm or less, 15 to 30% by weight of hydraulic cement, and 15 to 30% by weight of glass powder having a particle diameter of 2 mm or less, The raw material mixture for the porous reinforcing layer, characterized in that it comprises 50 to 90% by weight of a ceramic ceramic ground powder having a particle size of 6mm or less, 5 to 25% by weight of hydraulic cement, and 5 to 25% by weight of glass powder having a particle size of 2mm or less. Porous Sintered Body. The method of claim 8, Pigment and / or fly ash is additionally included in the mixture for the porous repair layer and the mixture for the porous reinforcing layer Porous Sintered Body. The method of claim 8, The ratio (T / D) of the thickness (T) of the porous repair layer and the thickness (D) of the porous reinforcing layer is in the range of 3 to 11, characterized in that Porous Sintered Body. A porous sintered packaging material comprising the porous sintered body according to any one of claims 8 to 11.