JP2006328923A - Waterproofed construction member for exterior wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive construction member for an exterior wall by manufacturing the member for the wall by using industrial wastes, and by applying durable waterproof treatment on the surface of the member. <P>SOLUTION: The wall member has a waterproof hardened film constituted of a clay calcined body, a carbonic-acid solidified body and an organic/inorganic hybrid film. Then the organic/inorganic hybrid film of the construction member for the exterior wall is derived from an organic silicon compound and an inorganic oxide particulate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a coating film for a building member having a cured film on a carbonated solid body and a clay fired body, and in particular, not only does not bring moisture from the outside into the room by providing waterproofness, but also water repellency and weather resistance. The present invention relates to a wall material for building which is excellent in productivity and excellent in productivity.

  Carbonation technology has long been used for plaster walls. Stucco walls are durable, durable and porous, and therefore have humidity control characteristics. Under monsoon climates like Japan, they have excellent properties as residential building materials that are cool in summer and warm in winter. Furthermore, although the recent sick house problem has been closed up, it is widely known that unreacted slaked lime in stucco adsorbs and decomposes formalin. The invention regarding the humidity-control building material which gave the humidity-controlling performance, maintaining the material characteristic mentioned above by using this carbonation solidification technique was made | formed previously (for example, refer patent documents 1-4).

In these carbonate solidification techniques, it is not necessary to fire at a high temperature (about 1000 to 1200 ° C.) as in the case of pottery, so that the production cost can be reduced. In terms of strength as well, it is possible to obtain the same strength as pottery bricks and tiles depending on the type of raw materials used (see, for example, Patent Document 5).
However, since the carbonic acid solidified body is porous (FIG. 1) and its surface is hydrophilic, there is an advantage that it easily absorbs moisture from the outside, but there is an adverse effect of bringing the moisture into the room. Moreover, since it is porous, there is a problem that dirt easily adheres. For this reason, while having the advantage of a stucco wall, it is desired to prevent surface contamination and prevent moisture from being brought into the room.

  If the carbonic acid solidified body is used as it is as a wall material, it is porous, so that moisture such as rain penetrates into the interior of the baked goods from the surface of the material and eventually brings moisture into the room. Moreover, the surface is very easy to get dirty, and once the dirt enters the carbonized solid, it is very difficult to remove the dirt. Therefore, glazes have been widely used for the purpose of making the surface of the pottery resistant to dirt and improving the cleanability. This glaze is excellent in durability but needs to be fired at high temperature. Since carbonation itself takes place at room temperature, the use of glaze cannot be considered. Moreover, since the glaze itself is glassy, it can prevent dirt, but it is practically difficult to treat a large area such as a building material.

  Therefore, at present, for the purpose of imparting water-repellent properties to building members, a water-repellent coating with a polymer resin is performed on the surface thereof (for example, see Patent Documents 6 to 8). As the method, a method of applying an alkylalkoxysilane compound-based compound to concrete or the like is employed. However, although these water-repellent resins are polymerized by a dehydration condensation reaction to some extent by a hydrolysis reaction, they are not excellent in film formability and have a problem in durability when used as a building member.

  When the resin is directly applied to the surface of the carbonate solidified body, the resin is taken into the pores (FIG. 1) on the surface. Therefore, a large amount of expensive polymer resin is required to leave the amount of resin necessary for the water repellency performance on the surface of the carbonic acid solidified body. There is a problem that the strength also decreases. Therefore, the outer wall material made of a solidified carbonic acid is applied with a water-repellent polymer resin having an appropriate viscosity and dried, so that a relatively thin water-repellent coating is applied on the surface. However, the conventional coating materials have problems in weather resistance and wear resistance.

Patent Document 3 describes that a durable water-repellent coating can be formed on the ceramic surface by including a water-repellent substance in the raw material before firing the ceramic and firing at around 500 to 800 ° C. . By doing so, water repellency can be imparted to the fired ceramic, but the water repellent material decomposes at high temperature, and the ceramic itself cannot be fired at the original firing temperature of the ceramic, so the strength of the ceramic itself is reduced. Has a problem.
Japanese Patent Application No. 2004-237779 Japanese Patent Application No. 2004-237780 Japanese Patent Application No. 2004-237781 Japanese Patent Application No. 2004-237782 Japanese Patent Application No. 2003-420138 JP 2005-67921 A JP 2004-244903 A JP 2002-60283 A

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a waterproof wall building member having excellent weather resistance and excellent productivity.

  ADVANTAGE OF THE INVENTION According to this invention, the building member for walls excellent in weather resistance and waterproofness, and favorable productivity can be obtained.

  The object described above has been solved by the following means. The means is a building member for a wall obtained by applying a coating composition containing an organosilicon compound and specific inorganic oxide particles to the surface of a clay sintered body and a carbonate solidified body, followed by curing treatment.

  In this invention, it has the waterproof film comprised from the coating composition containing an inorganic oxide particle, an organic silicon compound, and a hardening | curing agent on the carbonic acid solidified body surface, It is characterized by the above-mentioned. Examples of the inorganic oxide particles include aluminum oxide, silicon oxide, iron oxide, tin oxide, titanium oxide, zinc oxide, and composite oxides thereof.

  Next, in the present invention, the organosilicon compound is a kind of the compound represented by the general formula (II) and the above-described inorganic oxide particles are used in the coating composition, whereby a high concentration of fine inorganic particles A coating film containing an oxide can be applied on the surface of the clay sintered body and the carbonate solidified body, and exhibits good waterproof performance over a long period of time. In this case, the silyl ether portion of the organosilane compound causes a hydrolysis reaction by appropriately stirring the organosilane compound and inorganic oxide particles, which are a kind of the compound represented by the general formula (II), in the presence of an acid catalyst. The surface of the inorganic oxide particles can be modified by dehydration condensation with the hydroxyl groups on the surface of the inorganic oxide particles. By thus modifying the surface of the inorganic oxide particles, the waterproof performance can be maintained for a longer period of time.

  In the coating composition of the present invention, inorganic oxide particles such as crushed waste mud (waste mud remaining after grinding stones and collecting aggregates), fly ash (coal fly ash discharged from a thermal power plant), etc. System waste can be used. In this case, it is desirable that the average particle diameter is 35 μm to 1 μm, and it can be used together with colloidal particles such as aluminum oxide, silicon oxide, titanium oxide, iron oxide, cerium oxide, zinc oxide, and composite colloidal particles thereof. .

（式中のＲ^６及びＲ^７は、それぞれ独立に、官能基を有する若しくは有しない炭素数１〜５の一価の炭化水素、Ｘ^１及びＸ^２は、それぞれ独立に、炭素数１〜４のアルキル基、炭素数１〜４のアシル基、Ｙは炭素数１〜２０の二価の炭化水素基、ｘおよびｙはそれぞれ０または１を示し、複数のＸ^１は互いに同一でも異なっていてもよく、また、複数のＸ^２は互いに同一でも異なっていてもよい。）で表される化合物、及びこれらの加水分解物の中から選ばれる少なくとも一種類であるであることが望ましい。In the coating composition of the present invention, the organosilicon compound has the following general formula (I):
(R ¹ ) _a (R ³ ) _b Si (OR ² ) _{4- (a + b)} (I)
(Wherein R ¹ and R ³ are each independently a monovalent hydrocarbon having 1 to 10 carbon atoms with or without a functional group, R ² is an alkyl group having 1 to 8 carbon atoms, and 6 to 6 carbon atoms) 10 aryl groups, aralkyl groups having 7 to 10 carbon atoms, or acyl groups having 1 to 8 carbon atoms, a and b each represents 0 or 1, and a plurality of OR ² may be the same as or different from each other. The following general formula (III)

(In the formula, R ⁶ and R ⁷ are each independently a monovalent hydrocarbon having 1 to 5 carbon atoms with or without a functional group, and X ¹ and X ² are each independently having 1 to 4 carbon atoms. Alkyl group, an acyl group having 1 to 4 carbon atoms, Y is a divalent hydrocarbon group having 1 to 20 carbon atoms, x and y each represents 0 or 1, and a plurality of X ¹ are the same or different from each other Or a plurality of X ² may be the same or different from each other), and at least one kind selected from these hydrolysates is desirable.

In the general formula (I), the monovalent hydrocarbon having 1 to 10 carbon atoms represented by ^{R 1} and ^{R 3,} an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, carbon atoms A 6-10 aryl group and a C7-10 aralkyl group can be mentioned. The alkyl group and alkenyl group may be linear, branched, or cyclic. Examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an isobutyl group, and a pentyl group. And a cyclohexyl group. Examples of alkenyl groups include vinyl, allyl, butenyl, and hexenyl groups. Examples of aryl groups include phenyl, tolyl, xylyl, and naphthyl groups. Examples of aralkyl groups Examples thereof include a benzyl group, a phenethyl group, and a naphthylmethyl group. A functional group may be introduced into these hydrocarbon groups, and examples of the functional group include a halogen atom, a glycidoxy group, an epoxy group, an amino group, a cyano group, and a mercapto group.

  Examples of the monovalent hydrocarbon group having 1 to 10 carbon atoms having a functional group include a glyoxide methyl group, an α-glycidoxyethyl group, a β-glycidoxyethyl group, an α-glycidoxypropyl group, β-glycidoxypropyl group, γ-glycidoxypropyl group, (3,4-epoxycyclohexyl) methyl group, β- (3,4-epoxycyclohexyl) ethyl group, γ- (3,4-epoxycyclohexyl) Examples thereof include a propyl group, a chloromethyl group, a γ-chloropropyl group, and a γ-methacryloxypropyl group.

On the other hand, in R ² , the alkyl group having 1 to 8 carbon atoms may be linear, branched or cyclic, and examples thereof include a methyl group, an ethyl group, an n-propyl group, and an isopropyl group. N-butyl group, isobutyl group, pentyl group, cyclohexyl group and the like, and examples of the aryl group having 6 to 10 carbon atoms include phenyl group, tolyl group, xylyl group and the like, and 7 to 10 carbon atoms. Examples of the aralkyl group include a benzyl group and a phenethyl group, and examples of the acyl group having 1 to 8 carbon atoms include an acetyl group.

In the general formula (III), examples of the alkyl group having 1 to 4 carbon atoms represented by X ¹ and X ² include a methyl group, an ethyl group, an n-propyl group, an impropyl group, an n-butyl group, and isobutyl. Examples of the acyl group having 1 to 4 carbon atoms include an acetyl group. X ¹ and X ² may be the same as or different from each other.
Moreover, as a C1-C5 monovalent hydrocarbon shown by R < ⁶ > and R < ⁷ >, a C1-C5 alkyl group and a C2-C5 alkenyl group are mentioned. These may be either linear or branched, and examples of the alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, and a pentyl group. Examples of alkenyl groups include vinyl, allyl, and butenyl groups. A functional group may be introduced into these hydrocarbon groups, and the functional group and the hydrocarbon having the functional group are the same as those described in the description of R ¹ and R ^{3 in} the general formula (I). Things can be mentioned. R ⁶ and R ⁷ may be the same as or different from each other.

The divalent hydrocarbon having 1 to 20 carbon atoms represented by Y is preferably an alkylene group or an alkylidene group, and examples thereof include a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group and a hexylene group. it can.
x and y each represents 0 or 1, and the plurality of OX ¹ and OX ² may be the same as or different from each other. Examples of the compound represented by the general formula (III) include methylenebis (methyldimethoxysilane), ethylenebis (ethyldimethoxysilane), propylenebis (ethyldiethoxysilane), and the like.

The coating composition of the present invention may be used as an organosilicon compound by selecting one of the compounds represented by the general formulas (I) and (III) and a hydrolyzate thereof. You may choose and combine. The hydrolysis composition is generally prepared by adding a basic aqueous solution such as sodium hydroxide or an aqueous ammonium solution or an acidic aqueous solution such as an aqueous hydrochloric acid solution to the compounds represented by (I) and (III) and stirring them. Can do.
The coating composition of the present invention may be coated with a curing agent or various organic solvents, surfactants, ultraviolet absorbers, light stabilizers, anti-aging agents, etc. for the purpose of improving wettability during coating. And can be added as long as the physical properties of the cured film are not affected.

  Moreover, it is desirable that the coating composition of the present invention further contains a fine particle inorganic oxide. There is no restriction | limiting in particular as a fine particle inorganic oxide, It can select and use arbitrary things from conventionally well-known things. Examples of the particulate inorganic oxide include simple metal oxide fine particles such as aluminum oxide, silicon oxide, titanium oxide, tin oxide and cerium oxide, or inorganic waste such as crushed stone waste mud and fly ash. . In this case, the average particle size of the particulate inorganic oxide is preferably from about 1 to 500 nm of colloidal particles to about several tens of μm.

  When the coating composition is based on the total amount, the desirable content of the particulate inorganic compound depends on the open porosity of the clay sintered body and the carbonate solidified body and the particle size of the raw clay, etc. It is desirable to add weight percent. In addition, since the desirable content of the particulate inorganic oxide contained in the cured film composed of the coating composition of the present invention varies depending on the surface roughness and open porosity of the clay sintered body and the carbonate solidified body, Although it is case-by-case, when the additive amount of the particulate inorganic oxide based on the total amount of the coating composition is 10 to 35% by weight, it is about 30 to 60% by weight.

  In the present invention, as a means for applying the coating composition to the surface of the clay sintered body and the carbonate solidified body, a commonly performed method such as a dipping method, a spin coating method, or a spray method can be applied. Curing of the coating composition is preferably performed by hot air drying or active energy ray irradiation and in hot air of about 70 to 250 ° C. Moreover, even if it puts on the surface of a pottery thing by performing this invention also about the pottery which is a porous body similarly to the carbonic acid solidified body surface, a waterproof characteristic can be provided.

In the present invention, the clay sintered body and the carbonate solidified body material for forming the waterproof film are not limited to industrial clay minerals, but fly ash, crushed waste mud and stone materials discharged from a thermal power plant So-called inorganic waste such as sludge can also be used.
Further, the waterproof film can be formed on the surface of the porcelain that is a porous body in the same manner as the surface of the carbonated solid body.

表１に示す成分分析には蛍光Ｘ線分析装置（理学電気工業（株）ＲＩＸ２０００）を使用し、酸化物表示で示すものとする。
（５）実施例に使用した試験体の作成方法
入交産業製消石灰（雪印、＃１００）１５０重量部、フライアッシュ（平均粒径２４．７μｍ）１００重量部、砕石廃泥（平均粒径２１．２μｍ）２５０重量部を乳鉢にて混合し、さらに純水８重量部を加えて混合した。次に３０ＭＰａの圧力で一軸プレス成形し、５０×５０×５ｍｍの成形体を作成した。このようにして得られた成形体を密閉容器に入れた後、０．０２ＭＰａまで減圧し、次いで二酸化炭素ガスにより、０．０５ＭＰａまで加圧した状態で２時間保持することで炭酸固化体を得た。EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples. In addition, the physical property evaluation of the waterproofing product obtained in the Example was performed as follows.
(1) Particle size measurement The raw material particle size was measured as follows. For raw materials that do not dissolve in tap water, tap water is used, and for raw materials that dissolve in tap water, a suspension is prepared using ethanol and adjusted to an appropriate concentration, and then a particle size analyzer (Microtrac HRA model No. 9320-) is prepared. X100) was measured by laser diffraction scattering method.
(2) Durability test method for waterproofing membrane A weather resistance test was performed under the following conditions using a xenon weather meter (Super Xenon Weather Meter SX75-WAP). The water absorption rate was measured using a specimen that was irradiated continuously for 500 hours under the conditions of an internal temperature of 30 ° C. and a humidity of 50% RH.
(3) Water Absorption Rate The sintered body was measured for dry weight W1 and weight W2 absorbed by atmospheric pressure for 3 hours, and measured by ((W2−W1) / W1) × 100. By applying a waterproof film to the surface of the carbonated solidified body, water intrusion into the carbonated solidified body is reduced, so the water absorption rate is expected to decrease for waterproofed products compared to untreated products. . Therefore, in order to compare the waterproof performance, it was decided to compare the water absorption obtained by the above method.
(4) Used waste The main constituent elements contained in the waste used in the examples are shown below.

In the component analysis shown in Table 1, a fluorescent X-ray analyzer (Rigaku Denki Kogyo Co., Ltd. RIX2000) is used, and is shown in oxide display.
(5) Method for preparing test specimens used in the examples 150 parts by weight of slaked lime (Snow Mark, # 100) manufactured by Ichiko Sangyo, 100 parts by weight of fly ash (average particle size 24.7 μm), waste crushed stone (average particle size 21) 0.2 μm) 250 parts by weight was mixed in a mortar, and 8 parts by weight of pure water was further added and mixed. Next, uniaxial press molding was performed at a pressure of 30 MPa to prepare a molded body of 50 × 50 × 5 mm. After putting the molded body thus obtained into a sealed container, the pressure is reduced to 0.02 MPa, and then the carbonic acid solidified body is obtained by holding for 2 hours while being pressurized to 0.05 MPa with carbon dioxide gas. It was.

In a glass container, 2 parts by weight of colloidal silica (Snowtex-40, Nissan Chemical), 10 parts by weight of organosilicon compound trifluoropropyltrimethoxysilane, 10 parts by weight of γ-glycidoxypropyltrimethoxysilane, 0.5N A solution obtained by adding 0.4 parts by weight of hydrochloric acid and 5.2 parts by weight of water was stirred at room temperature for 8 hours and then allowed to stand at room temperature for 16 hours to obtain a hydrolyzed solution. To this solution, 10 parts by weight of isopropyl alcohol, 10 parts by weight of n-butyl alcohol, 0.02 part by weight of a silicone surfactant and 0.01 part by weight of an ultraviolet absorber were added, and stirred for 8 hours at room temperature. A coating solution was obtained by adding 0.3 parts by weight of acetonate and stirring at room temperature for 8 hours.
The coating solution thus obtained was DIP-coated on the surface of the carbonic acid solidified molded body, and then dried and heated at 100 ° C. for 2 hours to prepare a cured film. In this case, the water absorption before the waterproofing treatment was 9.4%, but the water absorption after the waterproofing treatment was 0.4%, indicating good waterproofness. Moreover, the water absorption after the durability test of the waterproof film with a xenon weather meter was 0.7%.

Add 3 parts by weight of fly ash (average particle size 24.7 μm), 20 parts by weight of γ-glycidoxypropyltrimethoxysilane, 0.4 parts by weight of 0.5N hydrochloric acid, and 5.2 parts by weight of water to a glass container. The solution was stirred at room temperature for 8 hours and then allowed to stand at room temperature for 16 hours to obtain a hydrolyzed solution. To this solution, 10 parts by weight of isopropyl alcohol, 10 parts by weight of n-butyl alcohol, 0.02 part by weight of a silicone surfactant and 0.01 part by weight of an ultraviolet absorber were added, and stirred for 8 hours at room temperature. A coating solution was obtained by adding 0.3 parts by weight of acetonate and stirring at room temperature for 8 hours.
The coating solution thus obtained was DIP-coated on the surface of the carbonic acid solidified molded body, and then dried and heated at 100 ° C. for 2 hours to prepare a cured film. In this case, the water absorption before the waterproofing treatment was 9.2%, but the water absorption after the waterproofing treatment was 0.8%, indicating a good waterproof property. Moreover, the water absorption after the durability test of the waterproof film with a xenon weather meter was 2.1%.

In a glass container, 2 parts by weight of colloidal silica (Snowtex-40, Nissan Chemical), 10 parts by weight of an organosilicon compound, methyltrimethoxysilane, 10 parts by weight of γ-glycidoxypropyltrimethoxysilane, 0.5N hydrochloric acid 0 A solution obtained by adding 0.4 parts by weight and 5.2 parts by weight of water was stirred at room temperature for 8 hours and then allowed to stand at room temperature for 16 hours to obtain a hydrolyzed solution. To this solution, 10 parts by weight of isopropyl alcohol, 10 parts by weight of n-butyl alcohol, 0.02 part by weight of a silicone surfactant and 0.01 part by weight of an ultraviolet absorber were added, and stirred for 8 hours at room temperature. A coating solution was obtained by adding 0.3 parts by weight of acetonate and stirring at room temperature for 8 hours.
The coating solution thus obtained was DIP-coated on the surface of the carbonic acid solidified molded body, and then dried and heated at 100 ° C. for 2 hours to prepare a cured film. In this case, the water absorption before the waterproofing treatment was 8.9%, but the water absorption after the waterproofing treatment was 1.2%, indicating good waterproofness. In addition, the water absorption after the durability test of the waterproof film using a xenon weather meter was 4.1%.

Comparative Example 1

A solution obtained by adding 2 parts by weight of colloidal silica (Snowtex-40, Nissan Chemical Co., Ltd.), 20 parts by weight of γ-glycidoxypropyltrimethoxysilane, and 5.2 parts by weight of water to a glass container for 8 hours at room temperature. After stirring, the mixture was allowed to stand at room temperature for 16 hours to obtain a hydrolysis solution. To this solution, 10 parts by weight of isopropyl alcohol, 10 parts by weight of n-butyl alcohol, 0.02 part by weight of a silicone surfactant and 0.01 part by weight of an ultraviolet absorber were added, and stirred for 8 hours at room temperature. A coating solution was obtained by adding 0.3 parts by weight of acetonate and stirring at room temperature for 8 hours.
The coating solution thus obtained was DIP-coated on the surface of the carbonic acid solidified molded body, and then dried and heated at 100 ° C. for 2 hours to prepare a cured film. In this case, the water absorption before waterproofing was 9.0%, but the water absorption after waterproofing was 5.1%. Further, the water absorption after the durability test of the waterproof film with a xenon weather meter was 8.7%.

It is the schematic of the cross section of the carbonic acid solidification body surface (porous surface) before waterproofing processing. It is the schematic of the cross section of the carbonic acid solidified body surface after a waterproofing process.

Explanation of symbols

1: Carbonated solid surface 2: Internal pores 3: Waterproof membrane part

Claims (4)

  The cured film provided on the surface of the clay sintered body and the carbonate solidified body is coated with (A) metal oxide particles, (B) a coating composition containing an organosilicon compound and a curing agent, and then the curing treatment is heated with hot air. Or the building member for outer walls which has a waterproof cured film characterized by forming into a film by active energy ray irradiation.   (A) The component metal oxide particles are aluminum oxide, silicon oxide, titanium oxide, iron oxide, cerium oxide, zinc oxide, crushed stone waste mud, fly ash colloid particles and composite colloid particles thereof or metal oxide particles thereof. The building member for an outer wall having a waterproof cured coating according to claim 1, which is at least one selected from powders having an average particle diameter of 35 μm to 1 μm. The organosilicon compound as component (B) is represented by the following general formula (I)
(R ¹ ) _a (R ³ ) _b Si (OR ² ) _{4- (a + b)} (I)
(In the formula, R ¹ and R ³ are each independently a monovalent hydrocarbon having 1 to 10 carbon atoms with or without a functional group, R ² is an alkyl group having 1 to 8 carbon atoms, and 6 to 6 carbon atoms. 10 aryl groups, aralkyl groups having 7 to 10 carbon atoms, or acyl groups having 1 to 8 carbon atoms, a and b each represents 0 or 1, and a plurality of OR ² may be the same as or different from each other. The following general formula (II)
R ⁴ _m Si (OR ⁵ ) _4-m ... (II)
(In the formula, R ⁴ is a monovalent hydrocarbon having 1 to 10 carbon atoms having a methyl fluoride group or a fluorinated alkyl group at the end, and R ⁵ is a monovalent hydrocarbon having 1 to 3 carbon atoms. or an acyl group, m represents 0, 1 or 2, if R ⁴ is plural, R ⁴ may be the same or different from each other, a plurality of oR ⁵ may be the same or different from each other.) A compound represented by the following general formula (III)

(In the formula, R ⁶ and R ⁷ are each independently a monovalent hydrocarbon having 1 to 5 carbon atoms with or without a functional group, and X ¹ and X ² are each independently having 1 to 4 carbon atoms. Alkyl group, an acyl group having 1 to 4 carbon atoms, Y is a divalent hydrocarbon group having 1 to 20 carbon atoms, x and y each represents 0 or 1, and a plurality of X ¹ are the same or different from each other And a plurality of X ² may be the same or different from each other.) And at least one kind selected from hydrolysates thereof. A building member for an outer wall having a waterproof cured coating.   The component (A) according to claim 2, wherein the slaked lime, fly ash, and crushed stone waste mud are mixed at a ratio of 3: 2: 5 by weight and solidified in a carbon dioxide gas atmosphere. On the other hand, after applying a coating composition containing a curing agent and a liquid in which (B) according to claim 3 is mixed at a weight ratio of 10 to 3, the curing treatment is performed by heating with hot air or irradiation with active energy rays. A building member for an outer wall having a waterproof cured film.

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