【発明の詳細な説明】
く発明の技術分野〉
本発明は、セメント製品の表面に釉薬が融着した施釉セ
メント製品を製造する方法に関する．く捉来の技術〉
この種の施釉セメント製品の製造法においては、そルタ
ル製品やコンクリート製品のようなセメント製品の表面
に釉薬を厚く施し，釉薬を表面に−付着したセメント製
品を焼成して、釉薬をセメント製品の表面に融着する．
セメント製品の表面に施す釉薬を厚くする理由は、次の
通りである．
モルタル製品やコンクリート製品のようなセメント製品
の表面は、陶磁器の釉薬を施す面に比較して，凹凸が大
きいので、その大きな凹凸を隠して滑らかできれいな釉
面を得るためには、セメント製品の表面に施す釉薬は，
陶磁器の場合に比較して、厚くする必要・がある．
また、釉薬を表面に付着したセメント製品を焼成して釉
薬をセメント製品の表面に融着すると，セメント製品の
゛表面と釉薬の接合面付近に反応層が形成され，この反
応層が釉面に露出すると、光沢のある釉面が得られない
ので、反応層を覆って光沢のある釉面を得るためには、
セメント製品の表面に施す釉薬は、反応層を覆うだけの
厚さが必要になるものと考えられる．
通常、釉薬の付着厚さは、陶器の場合は０．４〜０．５
ｍｍ位であり、また，磁器の場合は０．２〜０．３１厘
位である．これに対し、セメント製品の場合は，その表
面の構造によって大きく異なるが、０．５〜１．５鵬鵬
位が望ましい．く発明が解決しようとする課題〉
ところが、モルタル製品やコンクリート製品のようなセ
メント製品の表面は、陶磁器の釉薬を施す面に比較して
、吸水性が乏しいので、セメント製品の表面に釉薬を厚
く施すと、釉薬は、セメント製品の表面を流動して、釉
薬の一部がセメント製品の表面から流出してしまう．
即ち、セメント製品の表面に厚く施した釉薬は、全部が
セメント製品の表面に付着しない．従って、上記の製造
法においては、セメント製品の表面に釉薬を厚く付着さ
せることが困難であり、釉面が滑らかできれいな光沢の
ある施釉セメント製品を得ることが困難である．
本発明の目的は，上記のような従来の課題を解決するこ
とである．
く課期を解決するための手段〉
本発明は，セメント製品の表面を釉薬を施す前に加熱し
、加熱状態のセメント製品の表面に釉薬を施して、セメ
ント製品の表面の熱によって釉薬中の水を蒸発させ、水
の蒸発によって釉薬の流動性を低下させて釉薬の流出を
防止し、セメント製品の表面に釉薬を厚く付着させるも
のである．即ち、本発明は、セメント製品の、少なくと
も、釉薬を施す施釉面を加熱し、
加熱状態のセメント製品の施釉面に釉薬を施して，セメ
ント製品の施釉面の熱によって釉薬中の水を蒸発させ、
セメント製品の施釉面に釉薬を付着させ，
釉薬を施釉面に付着したセメント製品を焼成して釉薬を
セメント製品の施釉面に融着することを特徴とする施釉
セメント製品の製造法である．なお、セメント製品の施
釉面を釉薬を施す前に加熱する温度は，釉薬中の水の蒸
発時間と加熱エネルギの消費量を考慮すると、１００〜
１８０℃位が好ましい．
く作 用〉
本発明の施釉セメント製品の製造法においては，セメン
ト製品の、少なくとも、釉薬を施す施釉面を加熱し、加
熱状態のセメント製品の施釉面に釉薬を施して，セメン
ト製品の施釉面の熱によって釉薬中の水を蒸発させるの
で、セメント製品の施釉面に施した釉薬は，水の蒸発に
よって流動性が低下して、セメント製品の施釉面から流
出し難くなり，セメント製品の施釉面に厚く付着し易い
．
く発明の効果〉
本発明の施釉セメント製品の製造法においては，セメン
ト製品の施釉面に付着する釉薬が厚くなり易いので，釉
面が滑らかできれいな光沢のある施釉セメント製品を得
ることが容易である．く実施例ｌ〉
本例の施釉セメント製品の製造法は、先ず，セメン｝１
００重量部，細骨材の砕砂３００重量部と水３５重量部
及び混和剤１重量部を混練したモルタルを流し込み虞形
し，この成形品を７０℃の温度で３時間蒸気養生して、
板状のセメント製品を製造する．
なお、上記のモルタ゜ルは，粗骨材を含むコンクリート
でもよい．
次に、セメント製品は，乾燥器に入れてセメント製品の
表面を１１０℃の温度に加熱し、乾燥器から取り出した
直後に、加熱状態のセメント製品の表面に，フリッ｝１
００重量部、顔料５重量部と水６０重量部及びその他の
添加剤０．６重量部を混合した釉薬をスプレーで吹き付
ける．すると，釉薬は、すぐに、その中の水がセメント
製品の表面の熱によって蒸発して、セメント製品の表面
に付着する．
セメント製品の表面に付着した釉薬の平均厚さは．１．
００厘鵬である．
なお、セメント製品の表面の加熱には，電気炉やガス炉
等を使用してもよい．セメント製品の表面に釉薬を施す
方法は、浸しかけ，流しかけ、吹きかけ、刷毛塗り等で
もよい．
次に、釉薬を表面に付着したセメント製品は，電気炉に
入れて８５０℃の温度で１時間焼威して釉薬をセメント
製品の表面に融着する．釉薬を表面に融着したセメント
製品は、徐冷後、１日水中養生して、施釉セメント製品
を製造する．木例の製造法によって得られた施釉セメン
ト製品は、釉面が滑らかできれいな光沢のある面である
．
く実施例２〉
木例の施釉セメント製品の製造法は，先ず、前例の製造
法におけるのと同様な板状のセメント製品を製造する．
次に，セメント製品は、乾燥器に入れてセメント製品の
表面を１５０℃の温度に加熱し、乾燥器から取り出した
直後に，加熱状態のセメント製品の表面に，フリッ｝１
００重量部、顔料５重量部と水６０重量部及びその他の
添加剤０．６重量部を混合した釉薬を浸しがけする．
すると，釉薬は，すぐに、その中の水がセメント製品の
表面の熱によって蒸発して、セメント製品の表面に付着
する．
セメント製品の表面に付着した釉薬の平均厚さは・ ０
・６５ｍ園である．
次に、釉薬を表面に付着したセメント製品は，前例の製
造法におけるのと同様に焼威して釉薬をセメント製品の
表面に融着し、その後，徐冷して養生し，施釉セメント
製品を製造する．この施釉セメント製品は、釉面が滑ら
かできれいな光沢のある面である．
く比較例〉
前例の製造法におけるのと同様な板状のセメント製品の
表面を釉薬を施す前に加熱せず，常温状態のセメント製
品の表面に、前例の製造法におけるのと同様な釉薬を同
様な条件で澄しがけし、釉薬の付着厚さを測定する．DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method for manufacturing a glazed cement product in which a glaze is fused to the surface of the cement product. In the manufacturing method of this type of glazed cement product, a thick layer of glaze is applied to the surface of a cement product such as a solutar product or a concrete product, and the cement product with the glaze attached to the surface is fired. , the glaze is fused to the surface of the cement product. The reasons for thickening the glaze applied to the surface of cement products are as follows. The surface of cement products such as mortar products and concrete products has larger irregularities than the glazed surface of ceramics, so in order to hide the large irregularities and obtain a smooth and clean glazed surface, it is necessary to The glaze applied to the surface is
Compared to ceramics, it needs to be thicker. In addition, when a cement product with glaze attached to its surface is fired and the glaze is fused to the surface of the cement product, a reaction layer is formed near the interface between the surface of the cement product and the glaze, and this reaction layer is attached to the glaze surface. If exposed, a shiny glaze surface cannot be obtained, so in order to cover the reaction layer and obtain a shiny glaze surface,
It is thought that the glaze applied to the surface of cement products needs to be thick enough to cover the reaction layer. Usually, the glaze adhesion thickness is 0.4 to 0.5 for ceramics.
It is about mm, and in the case of porcelain it is about 0.2 to 0.31 lin. On the other hand, in the case of cement products, it is desirable to have a hardness of 0.5 to 1.5, although it varies greatly depending on the surface structure. However, the surface of cement products such as mortar products and concrete products has poor water absorption compared to the glazed surface of ceramics, so it is difficult to apply a thick glaze to the surface of the cement product. When applied, the glaze flows over the surface of the cement product, and some of the glaze flows out from the surface of the cement product. In other words, if the glaze is applied thickly to the surface of a cement product, not all of it will adhere to the surface of the cement product. Therefore, in the above manufacturing method, it is difficult to thickly adhere the glaze to the surface of the cement product, and it is difficult to obtain a glazed cement product with a smooth, clean, and glossy glazed surface. The purpose of the present invention is to solve the conventional problems as described above. Means for Solving Problems> The present invention heats the surface of a cement product before applying glaze, applies glaze to the heated surface of the cement product, and uses the heat on the surface of the cement product to release the glaze. This method evaporates water, reduces the fluidity of the glaze by evaporating water, prevents the glaze from flowing out, and thickly adheres the glaze to the surface of the cement product. That is, the present invention heats at least the glazed surface of the cement product, applies the glaze to the glazed surface of the heated cement product, and evaporates water in the glaze by the heat of the glazed surface of the cement product. ,
This method of manufacturing glazed cement products is characterized by attaching glaze to the glazed surface of the cement product, firing the cement product with the glaze attached to the glazed surface, and fusing the glaze to the glazed surface of the cement product. In addition, the temperature at which the glazed surface of the cement product is heated before applying the glaze is 100 - 100 m, considering the evaporation time of water in the glaze and the amount of heating energy consumed.
Preferably around 180°C. Function> In the method for producing a glazed cement product of the present invention, at least the glazed surface of the cement product to be glazed is heated, the glaze is applied to the heated glazed surface of the cement product, and the glazed surface of the cement product is heated. As the water in the glaze is evaporated by the heat of It easily adheres thickly to the surface. Effects of the Invention In the method for producing a glazed cement product of the present invention, the glaze that adheres to the glazed surface of the cement product tends to become thick, so it is easy to obtain a glazed cement product with a smooth, clean, and glossy glazed surface. be. Example 1> The method for manufacturing the glazed cement product of this example is as follows: First, cement 1
00 parts by weight of crushed sand, 300 parts by weight of fine aggregate, 35 parts by weight of water, and 1 part by weight of an admixture were poured into a mortar, and the molded product was steam-cured at a temperature of 70°C for 3 hours.
Manufacture plate-shaped cement products. The mortar mentioned above may also be concrete containing coarse aggregate. Next, the cement product is placed in a dryer, and the surface of the cement product is heated to a temperature of 110°C. Immediately after taking it out of the dryer, the surface of the heated cement product is coated with
00 parts by weight, 5 parts by weight of pigment, 60 parts by weight of water, and 0.6 parts by weight of other additives. Then, the water in the glaze immediately evaporates due to the heat on the surface of the cement product and adheres to the surface of the cement product. What is the average thickness of the glaze attached to the surface of the cement product? 1.
This is 00 Rinpeng. Note that electric furnaces, gas furnaces, etc. may be used to heat the surface of cement products. Glazes can be applied to the surface of cement products by dipping, pouring, spraying, brushing, etc. Next, the cement product with the glaze attached to its surface is placed in an electric furnace and fired at a temperature of 850°C for one hour to fuse the glaze to the surface of the cement product. Cement products with glaze fused to their surfaces are slowly cooled and then cured in water for one day to produce glazed cement products. The glazed cement products obtained using the wood example manufacturing method have a smooth, clean, and shiny surface. Example 2 In the method for manufacturing the glazed cement product in the wood example, first, a plate-shaped cement product similar to that in the previous manufacturing method is manufactured. Next, the cement product is placed in a dryer and the surface of the cement product is heated to a temperature of 150°C. Immediately after taking it out of the dryer, the heated surface of the cement product is heated to a temperature of 150°C.
00 parts by weight, 5 parts by weight of pigment, 60 parts by weight of water, and 0.6 parts by weight of other additives. Then, the water in the glaze immediately evaporates due to the heat on the surface of the cement product and adheres to the surface of the cement product. The average thickness of the glaze attached to the surface of cement products is 0.
・It is a 65m garden. Next, the cement product with the glaze attached to the surface is burned to fuse the glaze to the surface of the cement product, as in the previous manufacturing method, and then slowly cooled and cured to form the glazed cement product. Manufacture. This glazed cement product has a smooth, clean and shiny surface. Comparative Example> The surface of a plate-shaped cement product similar to that used in the manufacturing method of the previous example was not heated before applying the glaze, and the glaze similar to that used in the manufacturing method of the previous example was applied to the surface of the cement product at room temperature. Glaze under the same conditions and measure the thickness of the glaze.