JPH0515671B2 - - Google Patents
Info
- Publication number
- JPH0515671B2 JPH0515671B2 JP63316841A JP31684188A JPH0515671B2 JP H0515671 B2 JPH0515671 B2 JP H0515671B2 JP 63316841 A JP63316841 A JP 63316841A JP 31684188 A JP31684188 A JP 31684188A JP H0515671 B2 JPH0515671 B2 JP H0515671B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- substrate
- silica
- compound layer
- inorganic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Description
本発明はエフロレツセンスの発生がなく、表面
に形成した無機塗膜にクラツクが生じることがな
いセメント板の製造方法に関する。
The present invention relates to a method for manufacturing a cement board that does not cause efflorescence and does not cause cracks in the inorganic coating film formed on the surface.
従来より、セメントを主成分とする基板の表面
にシーラー層を介して無機塗料が塗布されて無機
塗膜が形成され表面化粧がなされたセメント板が
知られている。
BACKGROUND ART Conventionally, cement boards have been known in which an inorganic paint is applied to the surface of a substrate whose main component is cement via a sealer layer to form an inorganic coating film to provide a surface decoration.
従来にあつては無機塗膜は硬くてクラツクが生
じ易いものであり、又、セメントを主成分とする
基板はエフロレツセンス現象が生じ易く、無機塗
膜のクラツクから染み出して著しく美観が損なわ
れてしまつていた。又、無機塗膜にクラツクが発
生しない場合にもエフロレツセンス成分が無機塗
膜とシーラー層との間に蓄積してしまい無機塗膜
が剥がれてしまうという問題があつた。
本発明は上記問題点を解決するために為された
ものであり、その目的とするところは、エフロレ
ツセンス現象が生じなく、無機塗膜の耐久性が向
上したセメント板を提供することにある。
Conventionally, inorganic paint films are hard and prone to cracks, and substrates whose main component is cement are prone to efflorescence, which oozes out from cracks in the inorganic paint film and significantly impairs its aesthetic appearance. It had been washed away. Furthermore, even when cracks do not occur in the inorganic coating, there is a problem in that the efflorescence component accumulates between the inorganic coating and the sealer layer, resulting in the inorganic coating peeling off. The present invention was made to solve the above problems, and its purpose is to provide a cement board that does not cause the efflorescence phenomenon and has improved durability of the inorganic coating film. .
本発明のセメント板の製造方法は、セメントを
主成分とする基板１の表面に、基板１を養生硬化
する前にシリカヒユームを散布し、次いでプレス
を施した後養生硬化させてシリカ化合物層２を形
成させ、このシリカ化合物層２に無機塗料を塗布
して無機塗膜３を形成させて成るものであり、こ
の構成により上記課題が解決されたものである。
［作用］
シリカヒユームはセメントのアルカリ成分と反
応し易く、極めて安定なシリカ化合物層２が形成
されることになり、このシリカ化合物層２により
エフロレツセンスの発生を防止でき、無機塗膜３
を剥離させることなどなく、表面の化粧が損なわ
れることがないものである。
本発明におけるセメントを主成分とする基板１
は、普通ポルトランドセメント、早強ポルトラン
ドセメント、中庸ポルトランドセメントなどの単
味ポルトランドセメント、混合ポルトランドセメ
ント、アルミナセメント、マグネシアセメントな
どの特殊セメント等のセメントにウオラストナイ
ト、マイカ、セピオライト等の充填材とパルプ、
ビニロンのような有機繊維と石綿、岩綿のような
無機繊維を配合し、所望によりリグニンスルホン
酸、ホルマリン縮合物などの撥水剤その他混和材
料が配合され適量の水を加えて調製されたセメン
トスラリーから長網式抄造機などにより抄造され
たものである。この基板１が養生硬化される前
に、シリカヒユームが散布され、プレスを施した
後基板１が養生硬化される。この養生硬化によ
り、シリカヒユームとセメントのアリカリ成分と
が反応して極めて安定なシリカ化合物層２が形成
されている。
このシリカ化合物層２には無機塗料が塗布され
無機塗膜３が形成されている。無機塗料としては
ケイ素アルコキシ系塗料（特開昭62−275170号）
が好適に採用される。シリカ化合物層２と無機塗
膜３との間にアクリルエマルジヨンのような有機
塗料を塗布して有機塗膜を形成したり、シーラー
を塗布しておけばエフロレツセンスの発生が完全
に防止される。
次に、本発明の実施例を説明する。
実施例 １
普通ポルトランドセメント50重量％、高炉水砕
スラグ33重量％、石膏５重量％、パルプ5.0％、
ビニロン２％、ロツクウール５％を配合して適量
の水を加えてミキサーで撹拌しセメントスラリー
を調製した。
次に、このセメントスラリーを300mm×300mmの
濾過機で濾過し、厚み15mmの基板を得た。濾過の
最終段階で濃度10重量％に調製したシリカヒユー
ムスラリーを注ぎ、濾過して基板の表面にシリカ
ヒユームを25ｇ／m2の散布量で散布した。
次いで、基板を圧力30Kg／cm2でプレスした後60
〜80℃の温室中で養生硬化させ、この後40℃で乾
燥して基板を硬化させた。
この後、硬化した基板にアクリルエマルジヨン
を25ｇ／m2の塗布量（固形分）で塗布し、乾燥し
た後特開昭62−275170号に開示されている無機塗
料を塗布し、焼き付けてセメント板を製造した。
このセメント板の外観を観察すると共に屋外暴
露によりエフロレツセンスの発生の有無を観察し
た。
結果を第１表に示す。
実施例 ２
硬化した基板にアクリルエマルジヨンを50ｇ／
m2の塗布量（固形分）で塗布した以外は実施例１
と同様にしてセメント板を製造し、同様の観察を
行つた。結果を第１表に示す。
実施例 ３
硬化した基板にアクリルエマルジヨンを100
ｇ／m2の塗布量（固形分）で塗布した以外は実施
例１と同様にしてセメント板を製造し、同様の観
察を行つた。結果を第１表に示す。
実施例 ４
基板の表面にシリカヒユームを50ｇ／m2の散布
量で散布した以外は実施例１と同様にしてセメン
ト板を製造し、同様の観察を行つた。結果を第１
表に示す。
実施例 ５
基板の表面にシリカヒユームを50ｇ／m2の散布
量で散布し、硬化した基板にアクリルエマルジヨ
ンを50ｇ／m2の塗布量（固形分）で塗布した以外
は実施例１と同様にしてセメント板を製造し、同
様の観察を行つた。結果を第１表に示す。
実施例 ６
基板の表面にシリカヒユームを50ｇ／m2の散布
量で散布し、硬化した基板にアクリルエマルジヨ
ンを100ｇ／m2の塗布量（固形分）で塗布した以
外は実施例１と同様にしてセメント板を製造し、
同様の観察を行つた。結果を第１表に示す。
実施例 ７
硬化した基板にアクリルエマルジヨンを塗布し
なかつた以外は実施例１と同様にしてセメント板
を製造し、同様の観察を行つた。結果を第１表に
示す。
実施例 ８
基板の表面にシリカヒユームを50ｇ／m2の散布
量で散布し、硬化した基板にアクリルエマルジヨ
ンを塗布しなかつた以外は実施例１と同様にして
セメント板を製造し、同様の観察を行つた。結果
を第１表に示す。
比較例 １
基板の表面にシリカヒユームを散布しないで、
硬化した基板にアクリルエマルジヨンを25ｇ／m2
（固形分）を塗布した以外は実施例１と同様にし
てセメント板を製造し、同様の観察を行つた。結
果を第１表に示す。
比較例 ２
基板の表面にシリカヒユームを散布しないで、
硬化した基板にアクリルエマルジヨンを50ｇ／m2
（固形分）で塗布した以外は実施例１と同様にし
てセメント板を製造し、同様の観察を行つた。結
果を第１表に示す。
比較例 ３
基板の表面にシリカヒユームを散布しないで、
硬化した基板にアクリルエマルジヨンを100ｇ／
m2（固形分）で塗布した以外は実施例１と同様に
してセメント板を製造し、同様の観察を行つた。
結果を第１表に示す。
The method for manufacturing a cement board of the present invention is to spray silica fume on the surface of a substrate 1 whose main component is cement before curing and hardening the substrate 1, and then press it and then curing and hardening to form a silica compound layer 2. The silica compound layer 2 is then coated with an inorganic paint to form an inorganic coating film 3, and this structure solves the above problems. [Function] Silica hume easily reacts with the alkaline components of cement, resulting in the formation of an extremely stable silica compound layer 2. This silica compound layer 2 can prevent the occurrence of efflorescence, and the inorganic coating film 3
It does not cause any peeling and does not damage the surface makeup. Substrate 1 mainly composed of cement according to the present invention
It is made of cement such as plain Portland cement, early strength Portland cement, medium Portland cement, mixed Portland cement, special cement such as alumina cement, magnesia cement, etc., and fillers such as wollastonite, mica, and sepiolite. pulp,
Cement prepared by blending organic fibers such as vinylon with inorganic fibers such as asbestos and rock wool, and optionally containing water repellents such as lignin sulfonic acid and formalin condensate, as well as other admixtures, and adding an appropriate amount of water. It is made from slurry using a Fourdrinier paper making machine or the like. Before this substrate 1 is aged and hardened, silica fume is sprinkled on it, and after pressing, the substrate 1 is aged and hardened. Through this curing and hardening, the silica hume and the alkali component of the cement react to form an extremely stable silica compound layer 2. This silica compound layer 2 is coated with an inorganic paint to form an inorganic coating film 3. As an inorganic paint, silicon alkoxy paint (Japanese Patent Application Laid-Open No. 62-275170)
is preferably adopted. If an organic coating such as acrylic emulsion is applied between the silica compound layer 2 and the inorganic coating 3 to form an organic coating, or a sealer is applied, the occurrence of efflorescence can be completely prevented. Ru. Next, examples of the present invention will be described. Example 1 Ordinary Portland cement 50% by weight, granulated blast furnace slag 33% by weight, gypsum 5% by weight, pulp 5.0%,
A cement slurry was prepared by blending 2% vinylon and 5% rock wool, adding an appropriate amount of water, and stirring with a mixer. Next, this cement slurry was filtered using a 300 mm x 300 mm filter to obtain a substrate with a thickness of 15 mm. At the final stage of filtration, a silica fume slurry prepared to a concentration of 10% by weight was poured, filtered, and silica fume was sprinkled on the surface of the substrate at a rate of 25 g/m 2 . Next, after pressing the substrate at a pressure of 30Kg/ cm2 ,
The substrate was cured and cured in a greenhouse at ~80°C, and then dried at 40°C to harden the substrate. After that, acrylic emulsion was applied to the cured substrate at a coating weight of 25 g/m 2 (solid content), and after drying, an inorganic paint disclosed in JP-A No. 62-275170 was applied, and the cement was baked. The board was manufactured. The appearance of this cement board was observed, and the presence or absence of efflorescence was observed by exposure to the outdoors. The results are shown in Table 1. Example 2 50g of acrylic emulsion was applied to the cured substrate.
Example 1 except that it was applied with a coating amount (solid content) of m 2
A cement board was manufactured in the same manner as above, and the same observations were made. The results are shown in Table 1. Example 3 100% acrylic emulsion on a cured substrate
A cement board was produced in the same manner as in Example 1, except that the coating amount (solid content) was g/m 2 , and the same observations were made. The results are shown in Table 1. Example 4 A cement board was produced in the same manner as in Example 1, except that silica fume was sprinkled on the surface of the substrate at a rate of 50 g/m 2 , and the same observations were made. Results first
Shown in the table. Example 5 The same procedure as in Example 1 was carried out, except that silica fume was sprinkled on the surface of the substrate at a rate of 50 g/m 2 and acrylic emulsion was applied on the cured substrate at a rate of 50 g/m 2 (solid content). A cement board was manufactured using the same method, and similar observations were made. The results are shown in Table 1. Example 6 The same procedure as in Example 1 was carried out, except that silica fume was sprinkled on the surface of the substrate at a rate of 50 g/m 2 and acrylic emulsion was applied on the cured substrate at a rate of 100 g/m 2 (solid content). to manufacture cement boards,
Similar observations were made. The results are shown in Table 1. Example 7 A cement board was manufactured in the same manner as in Example 1, except that the acrylic emulsion was not applied to the cured substrate, and the same observations were made. The results are shown in Table 1. Example 8 A cement board was manufactured in the same manner as in Example 1, except that silica fume was sprinkled on the surface of the substrate at a rate of 50 g/m 2 and acrylic emulsion was not applied to the hardened substrate, and the same observations were made. I went there. The results are shown in Table 1. Comparative Example 1 Without spraying silica fume on the surface of the substrate,
25g/ m2 of acrylic emulsion on the cured substrate
A cement board was manufactured in the same manner as in Example 1 except that (solid content) was applied, and the same observations were made. The results are shown in Table 1. Comparative Example 2 Without spraying silica fume on the surface of the substrate,
50g/m 2 of acrylic emulsion on the cured substrate
A cement board was manufactured in the same manner as in Example 1, except that it was coated with (solid content), and the same observations were made. The results are shown in Table 1. Comparative Example 3 Without spraying silica fume on the surface of the substrate,
100g of acrylic emulsion on the cured substrate
A cement board was manufactured in the same manner as in Example 1, except that the cement board was coated with m 2 (solid content), and the same observations were made.
The results are shown in Table 1.
【表】
第１表の結果より本発明の実施例にあつては光
沢に優れ、しかもエフロレツセンスの発生がない
セメント板を得ることができることが理解され
る。[Table] From the results shown in Table 1, it is understood that the examples of the present invention can provide cement boards with excellent gloss and without the occurrence of efflorescence.
本発明にあつてはセメントを主成分とする基板
の表面にシリカヒユームを散布し養生硬化させて
シリカ化合物層を形成させ、このシリカ化合物層
に無機塗料を塗布して無機塗膜を形成させている
ので、シリカヒユームはセメントのアルカリ成分
と反応し易く、極めて安定なシリカ化合物層が形
成されることになり、このシリカ化合物層により
エフロレツセンスの発生を防止でき、無機塗膜を
剥離させることなどもなく、表面の化粧が損なわ
れることがないものである。しかも、基板を養生
硬化する前にシリカヒユームを散布し、次いでプ
レスを施した後養生硬化させてシリカ化合物層を
形成させるので、シリカ化合物層を極めて薄く形
成できるものであり、シリカヒユームの使用量を
少なくしてコストの低減を図ることができると共
にプレスの影響を抑制することができるものであ
る。
In the present invention, silica fume is sprinkled on the surface of a substrate whose main component is cement and cured to form a silica compound layer, and an inorganic paint is applied to this silica compound layer to form an inorganic coating film. Therefore, silica hume easily reacts with the alkaline components of cement, resulting in the formation of an extremely stable silica compound layer.This silica compound layer can prevent the occurrence of efflorescence and can also prevent the inorganic coating from peeling off. without damaging the surface makeup. Furthermore, since silica fume is spread on the substrate before curing and hardening, and then pressing is performed and curing is performed to form a silica compound layer, the silica compound layer can be formed extremely thin, reducing the amount of silica fume used. This makes it possible to reduce costs and suppress the influence of pressing.
第１図は本発明の一実施例を示す断面図であつ
て、１は基板、２はシリカ化合物層、３は無機塗
膜である。
FIG. 1 is a sectional view showing one embodiment of the present invention, in which 1 is a substrate, 2 is a silica compound layer, and 3 is an inorganic coating film.
Claims (1)
を養生硬化する前にシリカヒユームを散布し、次
いでプレスを施した後養生硬化させてシリカ化合
物層を形成させ、このシリカ化合物層に無機塗料
を塗布して無機塗膜を形成させることを特徴とす
るセメント板の製造方法。 ２ シリカ化合物層に有機塗料を塗布して形成し
た有機塗膜に無機塗膜を形成させることを特徴と
する請求項１記載のセメント板の製造方法。[Claims] 1. Silica fume is sprinkled on the surface of a substrate whose main component is cement before the substrate is cured and hardened, and then pressed and cured to form a silica compound layer. A method for producing a cement board, which comprises applying an inorganic paint to a layer to form an inorganic coating film. 2. The method of manufacturing a cement board according to claim 1, characterized in that an inorganic coating film is formed on an organic coating film formed by applying an organic coating material to the silica compound layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31684188A JPH02160680A (en) | 1988-12-15 | 1988-12-15 | Cement plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31684188A JPH02160680A (en) | 1988-12-15 | 1988-12-15 | Cement plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02160680A JPH02160680A (en) | 1990-06-20 |
| JPH0515671B2 true JPH0515671B2 (en) | 1993-03-02 |
Family
ID=18081513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31684188A Granted JPH02160680A (en) | 1988-12-15 | 1988-12-15 | Cement plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02160680A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63110341A (en) * | 1986-10-28 | 1988-05-14 | ナショナル住宅産業株式会社 | Glazed concrete panel |
-
1988
- 1988-12-15 JP JP31684188A patent/JPH02160680A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02160680A (en) | 1990-06-20 |
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