JPS59199592A - Manufacture of cement formed body - Google Patents
Manufacture of cement formed bodyInfo
- Publication number
- JPS59199592A JPS59199592A JP7539183A JP7539183A JPS59199592A JP S59199592 A JPS59199592 A JP S59199592A JP 7539183 A JP7539183 A JP 7539183A JP 7539183 A JP7539183 A JP 7539183A JP S59199592 A JPS59199592 A JP S59199592A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- molded body
- metal oxide
- strength
- coating
- 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.)
- Granted
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
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5031—Alumina
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明はセメント成形体の製造方法に関し、詳しくは、
表面に金属酸化物被覆を有する耐久性にずくれたセメン
ト成形体を製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cement molded body, and in detail,
The present invention relates to a method for producing a durable cement molded body having a metal oxide coating on its surface.
セメント成形体の表面に無機塗料やｌ＋ｌｌ薬を焼付け
た表面化粧セメント成形体が既に知られているが、セメ
ント成形体は、一般に水を含有していると共に、水硬性
であるために、高温に加熱されると、内部に含まれてい
る水分が揮発し、収縮を起こして、その機械的強度か著
しく低下する。一方、溶射被覆は、一般に金属酸化物ほ
かセラミック材料を熱熔融状態で被着体表面に吹き付け
て接着させる方法であるが、この方法をセメンＩ・成形
体に適用すると、成形体表面が高温に加熱されるため、
一般には前記したように、セメント成形体基体に微細な
亀裂が多数化じて、強度低下が避けられず、従って、従
来、特に金属酸化物粒子をセメンＩ・成形体に高温で溶
射被覆したセメン１〜成形体を１４ることは困難である
とみられていた。Surface-decorated cement molded bodies are already known, in which inorganic paints and l+ll chemicals are baked onto the surface of the cement molded body, but cement molded bodies generally contain water and are hydraulic, so they cannot be exposed to high temperatures. When heated, the moisture contained inside the material evaporates, causing contraction and significantly reducing its mechanical strength. On the other hand, thermal spray coating is generally a method in which metal oxides or other ceramic materials are sprayed onto the surface of an adherend in a hot molten state to bond them. However, when this method is applied to a cement I molded body, the surface of the molded body is exposed to high temperatures. Because it is heated,
Generally, as mentioned above, a large number of microscopic cracks occur in the base of the cement molded product, and a decrease in strength is unavoidable. It was thought that it would be difficult to produce molded bodies from 1 to 14.
本発明は上記した問題を解決するためになされたもので
あって、成形体基体に亀裂を生しさせることな（、セメ
ント成形体に金属酸化物を溶射ずし、表面に強固に金属
酸化物粒子が接着された耐久性にすぐれるセメント成形
体を製造する方法を提供することを目的とする。The present invention has been made in order to solve the above-mentioned problems. It is an object of the present invention to provide a method for manufacturing a cement molded body having excellent durability and having particles bonded thereto.
本発明のセメント成形体の製造方法は、セメント成形体
が完全に硬化する前に、少なくともその表面層を含水率
が２％以下となるように乾燥し、その表面に金属酸化物
粒子を溶射して金属酸化物被覆を形成した後、水和養生
することを特徴とするものである。In the method for producing a cement molded body of the present invention, before the cement molded body is completely hardened, at least its surface layer is dried to a moisture content of 2% or less, and metal oxide particles are thermally sprayed on the surface. After forming a metal oxide coating, the method is characterized by hydration and curing.
本発明の方法において、セメン１へ成形体は、ポル１−
ラントセメンＩ−やアルミナセメント等のような水硬性
無機材料に水のほか、必要に応じて骨材、充填材、繊維
等を添加混合してなるセメント混練物を所要形状に成形
して得られ、ここに、通常、骨材としては砂、軽量骨材
、シャモット等、充填材としては鉱滓スラグ、粘土、フ
ライアッシュ等、また、繊維としては石綿、ガラス繊維
、ビニロン繊維、パルプ繊維等が用いられるが、しかし
、これらに限定されるものではない。In the method of the present invention, the molded body into cement 1 is formed into por 1-
It is obtained by molding a cement mixture into a desired shape, which is obtained by mixing a hydraulic inorganic material such as Landcemen I- or alumina cement with water and, if necessary, aggregate, filler, fiber, etc. Here, sand, lightweight aggregate, chamotte, etc. are usually used as aggregates, slag, clay, fly ash, etc. are used as fillers, and asbestos, glass fibers, vinylon fibers, pulp fibers, etc. are used as fibers. However, it is not limited to these.
本発明の方法によれば、溶射するセメント成形体は、少
なくとも溶射作業に必要な程度に硬化しているか、完全
には硬化していないことを要する。According to the method of the present invention, the cement molded body to be thermally sprayed needs to be hardened at least to the extent necessary for the thermal spraying operation, or not completely hardened.
ここに、完全に硬化するとは、通常、４週養生による最
終強度を有するに至ることを意味するものとし、本発明
においては、好ましくは、溶射されるセメント成形体が
、上記４週強度に比較して、その７０％以下の強度を有
するとき、これを完全に硬化する前とする。・このよう
に、セメント成形体が４週強度の７０％以下の強度を有
すれば、通常、金属酸化物を接着性よく成形体表面に溶
射被覆させることができるが、特に５０％以下がよい。Here, "completely hardened" usually means that it has a final strength after 4 weeks of curing, and in the present invention, preferably, the thermally sprayed cement molded product has a strength that is higher than the above 4-week strength. When the strength is 70% or less, this is considered as before being completely cured.・In this way, if the cement molded body has a strength of 70% or less of the 4-week strength, it is usually possible to thermally spray coat the surface of the molded body with metal oxide with good adhesion, but 50% or less is particularly preferable. .
上記のように、セメント成形体の硬化度を調整した後、
本発明によれは、少なくとも溶射する側の表面層を含水
率が２％以下となるように乾燥する。このような乾燥は
例えば、赤外線ヒーターにより表面を加熱することによ
り行なうことかできる。詳細な実験の結果によれば、特
に、Ｉ８射側表面を少なくとも２ＩｌｉＩ厚みにわたっ
て、含水率を２％以下に乾燥するときに良好な結果が得
られる。After adjusting the degree of hardening of the cement molded body as described above,
According to the present invention, at least the surface layer on the side to be thermally sprayed is dried so that the moisture content becomes 2% or less. Such drying can be carried out, for example, by heating the surface with an infrared heater. According to detailed experimental results, particularly good results are obtained when drying the I8 radiation side surface over a thickness of at least 2IliI to a moisture content of 2% or less.
本発明の方法において、溶射物質としては、アルミナや
ジルコニア等のような金属酸化物が用いられる。ガラス
粉末や釉薬フリットはセメン１−成形体表面への接着が
良好でなく、用いるには適しない。上記金属酸化物を溶
射するには、好ましくは、高温溶射できるガスプラズマ
溶射や水プラスマ溶射による。この溶射によれば、金属
酸化物は１０００°Ｃ以上にも加熱され、溶融状ｊＱで
セメント成形体表面に接着性のよい被覆を形成する。溶
射被覆の厚みは、通常、１０〜２０００μ、好ましくは
３０〜５００μである。被覆厚みが薄すぎるときは、被
覆による効果が十分ではなく、一方、厚ずぎるときは不
経済であると共に、溶射被覆に歪か生しるので好ましく
ない。In the method of the present invention, metal oxides such as alumina, zirconia, etc. are used as the spray material. Glass powder and glaze frit do not adhere well to the surface of the cement 1 molded body and are not suitable for use. The metal oxide is preferably thermally sprayed by gas plasma spraying or water plasma spraying, which can be thermally sprayed at high temperatures. According to this thermal spraying, the metal oxide is heated to 1000° C. or more, and forms a highly adhesive coating on the surface of the cement molded body in a molten state. The thickness of the thermal spray coating is usually 10 to 2000 microns, preferably 30 to 500 microns. If the thickness of the coating is too thin, the effect of the coating will not be sufficient, while if it is too thick, it will be uneconomical and cause distortion in the sprayed coating, which is not preferred.
このようにして、セメン１〜成形体表面に金属酸化物を
溶射した後、通常の方法によって、成形体を水和養生さ
ぜることにより、耐久性にすくれた表面化粧セメント成
形体を得ることができる。この水和養生は、必要な水分
が供給される限りは、特に方法は限定されず、例えば、
水中、蒸気中或いはオートクレーブ中での加圧下で行な
われる。After spraying the metal oxide onto the surface of cement 1 to the molded body in this way, the molded body is hydrated and cured by a normal method to obtain a surface-decorated cement molded body with excellent durability. be able to. The method of this hydration regimen is not particularly limited as long as the necessary moisture is supplied, for example,
It is carried out under pressure in water, steam or in an autoclave.
本発明の方法は、以上のように、その理由は明らかでは
ないが、セメント成形体の硬化度を調整すると共に、少
なくとも溶射側表面の含水率を所定値以下に乾燥するこ
とにより、金属酸化物を高温溶射しても、セメント成形
体基体には何ら亀裂が生じず、しかも、皆られる金属酸
化物被゛覆は強固に成形体表面に接着しており、耐久性
にすぐれた表面化粧セメント成形体を得ることができる
。As described above, although the reason is not clear, the method of the present invention adjusts the degree of hardening of the cement molded body and dries the water content of at least the surface of the thermal spraying side to a predetermined value or less. Even when sprayed at high temperatures, no cracks occur on the base of the cement molded product, and the metal oxide coating firmly adheres to the surface of the molded product, resulting in highly durable surface decorative cement molding. You can get a body.
尚、本発明の方法において、セメント成形体の少な（と
も溶射側表面層を上記したように乾燥すると共に、更に
、少な（とも溶射側表面ＩＱに銅粉や炭素繊維等のよう
な熱の良伝導体材料を分散させておくことによって、溶
射時に成形体か受ける高熱を拡散し、表面層における急
激な体積変化を防止することにより、 Ｆ、接着性、耐
久性にすぐれた金属酸化物の溶射被覆を形成することか
できる。In addition, in the method of the present invention, in addition to drying the surface layer on the thermally sprayed side of the cement molded body as described above, the surface layer on the thermally sprayed side of the cement molded body is By dispersing the conductive material, the high heat that the molded object receives during thermal spraying is diffused, and rapid volume changes in the surface layer are prevented. It is possible to form a coating.
以下に本発明の実施例を挙げる。尚、各別において、得
られたシート成形体の曲げ強度はＪＩＳＡ１４０８によ
る建築ボード類の曲げ試験法に準して測定した。Examples of the present invention are listed below. In each case, the bending strength of the obtained sheet molded body was measured according to the bending test method for architectural boards according to JISA1408.
実施例
第１表に示す組成のポルトランドセメント混練物を縦横
各１５ｃｍ、厚み６能のシー１−に成形し、そのシート
の硬化度及び溶射側の厚み２ｍ１１にわたる表面層の含
水率を第２表に示ずΔ乃至Ｈのいずれかに調整した。こ
こに、硬化度の調整は、成形されたシートの養生を中断
し、その圧縮強度を最終強度（４週強度）と比較するこ
とにより行ない、次いで、各シート表面にガスプラスマ
溶射法により、粒子径１０〜５０μの゛アルミナ粒子を
厚み１００μに溶射し、この後、温度９０ ’Ｃ１湿度
１００％の蒸気雰囲気中で２４時間養生した。Example A Portland cement mixture having the composition shown in Table 1 was molded into a sheet 1-15 cm long and 6 cm thick, and the degree of hardening of the sheet and the water content of the surface layer over a thickness of 2 m11 on the sprayed side are shown in Table 2. It was adjusted to any one of Δ to H, not shown in . Here, the degree of hardening is adjusted by interrupting the curing of the molded sheet and comparing its compressive strength with the final strength (4-week strength).Then, the particle size is adjusted on the surface of each sheet by gas plasma spraying. Alumina particles of 10 to 50 μm were thermally sprayed to a thickness of 100 μm, and then cured for 24 hours in a steam atmosphere at a temperature of 90° C. and a humidity of 100%.
第 ２ 表
また、溶射側の表面層の含水率は、は赤外線ヒーターに
より溶射側表面を加熱乾燥した後、厚み２關の表面層を
採取し、１０５°Ｃで２時間加熱した後、その重量減少
から求めた。 このようにして得られた表面溶射シート
を目視により異常の有無を観察すると共に、Ａ Ｓ Ｔ
Ｍ法による耐凍害性を評価した。Table 2 also shows the moisture content of the surface layer on the sprayed side. Obtained from the decrease. The surface sprayed sheet obtained in this way was visually inspected for any abnormalities, and AST
Freezing damage resistance was evaluated using the M method.
以上において、実施例により得られたシートの場合、す
べてについて溶射被覆層に亀裂の発生等の異常は何ら認
められなかった。また、耐凍害性はすべて１００サイク
ル以上であった。一方、比較例については、５−Ｉ処理
品（第１表の番号５の混練物からのセメント成形体を第
２表の条件■に示す硬化度及び表面層含水率を有するよ
うに調整して得た成形体を意味する。以下、同じ。）は
溶射被覆が剥離し、５−Ｊ処理品及び５−に処理品は成
形体基体に亀裂か生じた。また、５−１．５−Ｊ及び５
−に処理品の耐凍害性はそれぞれ５．８及び８サイクル
であった。In the above, in the case of the sheets obtained in the examples, no abnormalities such as occurrence of cracks were observed in the thermally sprayed coating layers. Furthermore, all the samples had frost damage resistance of 100 cycles or more. On the other hand, for comparative examples, the 5-I treated product (cement molded body from the kneaded material of No. 5 in Table 1 was adjusted to have the degree of hardening and surface layer moisture content shown in condition (■) in Table 2). The thermal spray coating of the obtained molded product (hereinafter the same applies) peeled off, and cracks appeared in the molded product base of the 5-J treated product and the 5-treated product. Also, 5-1.5-J and 5
- The frost damage resistance of the treated products was 5.8 and 8 cycles, respectively.
特許出願人 積水化学工業株式会社 代表者 胚 沼 基 利Patent applicant Sekisui Chemical Co., Ltd. Representative Mototoshi Numa
Claims (1)
ともその表面層を含水率が２％以下となるように乾燥し
、その表面に金属酸化物粒子を溶射して金属酸化物被覆
を形成した後、水和養生することを特徴とするセメン１
〜成形体の製造方法。(1) Before the cement 1 ~ molded body is completely cured, at least its surface layer is dried to a moisture content of 2% or less, and metal oxide particles are sprayed onto the surface to form a metal oxide coating. Cement 1 characterized by hydration and curing after formation
~Method for manufacturing a molded body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7539183A JPS59199592A (en) | 1983-04-27 | 1983-04-27 | Manufacture of cement formed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7539183A JPS59199592A (en) | 1983-04-27 | 1983-04-27 | Manufacture of cement formed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59199592A true JPS59199592A (en) | 1984-11-12 |
| JPH0339032B2 JPH0339032B2 (en) | 1991-06-12 |
Family
ID=13574837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7539183A Granted JPS59199592A (en) | 1983-04-27 | 1983-04-27 | Manufacture of cement formed body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59199592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246186A (en) * | 1987-11-05 | 1989-10-02 | Keihan Concrete Kogyo Kk | Colored concrete block |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60161382A (en) * | 1984-01-27 | 1985-08-23 | 株式会社イナックス | Manufacture of glazed cement product |
-
1983
- 1983-04-27 JP JP7539183A patent/JPS59199592A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60161382A (en) * | 1984-01-27 | 1985-08-23 | 株式会社イナックス | Manufacture of glazed cement product |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01246186A (en) * | 1987-11-05 | 1989-10-02 | Keihan Concrete Kogyo Kk | Colored concrete block |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0339032B2 (en) | 1991-06-12 |
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