JPH036294B2 - - Google Patents
Info
- Publication number
- JPH036294B2 JPH036294B2 JP13060385A JP13060385A JPH036294B2 JP H036294 B2 JPH036294 B2 JP H036294B2 JP 13060385 A JP13060385 A JP 13060385A JP 13060385 A JP13060385 A JP 13060385A JP H036294 B2 JPH036294 B2 JP H036294B2
- Authority
- JP
- Japan
- Prior art keywords
- expanding agent
- board
- board material
- inorganic building
- layer
- 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
- 239000000463 material Substances 0.000 claims description 18
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 7
- 239000002344 surface layer Substances 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 240000006365 Vitis vinifera Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Description
〈産業上の利用分野〉
この発明は無機質建築用板材に関し、詳しくは
外装に用いられる無機質建築用板材、例えば、外
壁壁板、平板状屋根瓦などの改良に関する。
〈従来の技術〉
従来、建築用板材としてセメント、石膏等の水
硬性原料を主成分として成形された無機質建築用
板材が広く用いられている。
これら無機質建築用板材は、その材料の特質に
より吸水しやすいため、外装板材、例えば壁板、
屋根材にあつては、外表面に防水塗装が行われ
る。
〈従来の問題点〉
しかしながら、外表面に防水塗装を施した無機
質建築用板材は、取付施工後、大気中の湿度ある
いは雨水等により、裏面側から吸水することがあ
り、これに起因して板材裏が吸水膨張し、表面側
へそり返り、このため取付状態が著るしく見苦し
くなるといつた欠点があつた。
もつとも、このような問題を解消するには、建
築用板材の表裏面共に防水塗装を施せば良いので
あるが、塗装工程の手間が掛り、安価に提供する
ことが困難となる。
特に、上記問題は、湿式抄造法により製造した
無機質板材に顕著にあらわれやすい。
〈発明が解決する問題点〉
この発明は上記問題点に鑑み、表面のみの防水
塗装にもかかわらず無機質建築用板材の吸水等に
よる事後的な反り曲りを簡単に防止することを目
的としてなされたものである。
〈問題点を解決するに至つた技術〉
この発明の無機質建築用板材は、表層面部分に
膨張剤が混入されて成形され、該層により周囲縁
辺が板材の裏面方向へ反るよう全体に内部応力を
生じさせて成ることを特徴とするものである。
〈作用〉
この発明の無機質建築用板材は、第１図に示す
ようにセメント等を主原料として成形される板材
１の表層部分２を、膨張剤を混入したセメント層
（着色ベニア層）３とし、養生硬化させることに
より、この表層部分２を膨張させ、この膨張時に
生じる内部応力によつて、板材１の周囲縁辺４，
４を板材裏面方向へ反るよう、あるいは反る方向
（矢印ｘ）への内部応力を生じさせて構成されて
いる。
従つて、壁材又は屋根材として使用後、板材裏
面への吸水により裏面側が膨張しても、上記内部
応力が緩和されるだけで板材は反対方向へそり返
ることは無い。
上記板材１の表層部分２を形成する膨張剤を混
入したセメント層３としては、第２図イに示すよ
うに、板材２の主体部分５の上層に膨張剤混入セ
メント層３を積層し、その上に防水塗装層６を設
けるほか、第２図ロに示すように表面着色セメン
ト層３Ａに膨張剤を混入し、一体化する構成とし
ても良い。
また、上記板材をいわゆる抄造法により製造す
る場合、第３図に示すように、無端状毛布ベルト
１０の移動方向に沿つて、板材主体部成形原料ス
ラリー用バツト１１Ａ，１１Ｂ，１１Ｃ及び膨張
剤混入原料スラリー用バツト１２を配列し、ま
ず、膨張剤混入原料スラリー用バツト１２により
毛布ベルト１０に成膜し、これをメーキングロー
ル１３に巻き取り、次いで、板材主体部成形原料
スラリー用バツト１１Ａ，１１Ｂ，１１Ｃにより
毛布ベルト１０上に成膜し、メーキングロール１
３上に巻き取り、所定厚さとなつた後メーキング
ロール１３上の成形板体を切開し、展開後所定の
平板体としていくのである。
なお、膨張剤としては、板材の養生を自然養生
で行う場合は、カルシウム、サルホアルミネート
系膨張剤を配合したものが、また、オートクレー
ブによる蒸気養生の場合は、酸化マグネシウム系
の膨張剤が反応速度との相関により好適に使用さ
れる。
上記説明において、抄造法による場合を示した
が、これに限らずいわゆる乾式法でも同様に製造
することも可能である。
〈実施例〉
次に、セメント、シリカ、細骨材及び補強繊維
から成るセメントスラリーと、該スラリーに下表
に示す膨張剤を各欄に示す配合量として添加した
表面形成用セメントスラリーとを用意し、第３図
に示した抄造法により厚さ５mm、表層部分の厚さ
0.5mmの板材を成形し、次いでこれを910mm×414
mmの板体に切断し、各養生方法により養生硬化さ
せ試験片とした。
上記試験片につき、Ｌ＝910mmとして、第４図
に示すように、そり量△を測定したところ、下表
の各欄に示す結果となつた。
<Industrial Application Field> The present invention relates to inorganic building boards, and more particularly to improvements in inorganic building boards used for exteriors, such as exterior wall boards and flat roof tiles. <Prior Art> Conventionally, inorganic building boards formed from hydraulic raw materials such as cement and gypsum have been widely used as building boards. These inorganic building boards tend to absorb water due to their material characteristics, so they can be used as exterior board materials, such as wallboards.
For roofing materials, waterproof coating is applied to the outer surface. <Conventional problems> However, after installation, inorganic building boards with waterproof coating applied to the outside surface may absorb water from the back side due to atmospheric humidity or rainwater, etc. The disadvantage was that the back side absorbed water and expanded and warped toward the front side, making the installation extremely unsightly. In order to solve this problem, it would be possible to apply a waterproof coating to both the front and back surfaces of the construction board, but the coating process is time-consuming and difficult to provide at a low price. In particular, the above-mentioned problems tend to appear significantly in inorganic board materials manufactured by wet papermaking methods. <Problems to be Solved by the Invention> In view of the above-mentioned problems, the present invention was made with the aim of easily preventing warping of inorganic building boards due to water absorption, etc., even though only the surface is waterproofed. It is something. <Technology that led to the solution of the problem> The inorganic building board of the present invention is molded with an expanding agent mixed into the surface layer, and the entire interior of the inorganic building board is molded so that the surrounding edge is warped toward the back surface of the board. It is characterized by generating stress. <Function> As shown in FIG. 1, the inorganic building board material of the present invention has a surface layer 2 of a board material 1 formed from cement or the like as a main raw material, with a cement layer (colored veneer layer) 3 mixed with an expanding agent. By curing and hardening, this surface layer portion 2 is expanded, and due to the internal stress generated during this expansion, the peripheral edge 4 of the plate material 1,
4 to warp toward the back surface of the plate material, or to generate internal stress in the warping direction (arrow x). Therefore, even if the back side of the plate expands due to water absorption after being used as a wall material or roofing material, the internal stress will only be relaxed and the plate will not warp in the opposite direction. As shown in FIG. 2A, the cement layer 3 mixed with an expanding agent that forms the surface layer 2 of the board 1 is formed by laminating the expanding agent-mixed cement layer 3 on the upper layer of the main body part 5 of the board 2. In addition to providing a waterproof coating layer 6 thereon, an expanding agent may be mixed into the surface colored cement layer 3A and integrated as shown in FIG. 2B. In addition, when the plate material is manufactured by a so-called papermaking method, as shown in FIG. The vats 12 for raw material slurry are arranged, and first, a film is formed on the blanket belt 10 using the vats 12 for raw material slurry mixed with an expanding agent, and this is wound onto the making roll 13, and then the vats 11A and 11B for raw material slurry for forming the main body of the plate material are formed. , 11C on the blanket belt 10, and the making roll 1
3, and after reaching a predetermined thickness, the formed plate on the making roll 13 is cut, and after being expanded, it is made into a predetermined flat plate. In addition, as an expanding agent, if the board is cured naturally, a calcium or sulfoaluminate-based expanding agent is used, and if the board is steam-cured in an autoclave, a magnesium oxide-based expanding agent is used. It is preferably used due to its correlation with speed. In the above description, a case using a papermaking method was shown, but the method is not limited to this, and it is also possible to similarly manufacture by a so-called dry method. <Example> Next, a cement slurry consisting of cement, silica, fine aggregate, and reinforcing fibers, and a cement slurry for surface formation in which the swelling agent shown in the table below was added to the slurry in the amount shown in each column were prepared. The thickness of the surface layer was 5 mm, and the thickness of the surface layer was
Form a 0.5mm plate material and then make it into 910mm x 414mm
It was cut into plates of mm and cured and hardened using various curing methods to obtain test pieces. Regarding the above test piece, the amount of warpage Δ was measured as shown in FIG. 4 with L=910 mm, and the results were shown in each column of the table below.
【表】
レーブ養
生)
なお、上表においてそり量は、板材縁辺が表面
より裏面側へそり曲るのをとし、逆の場合を
とした。
上表より明らかなように、膨張剤の添加量を４
％以上とすることが好ましい結果が得られること
が判明した。
〈効果〉
この発明は以上のように構成されているので、
板材の表面のみ防水塗装され、板材裏面に吸水さ
れても、これにより板材のそり曲りは、予め板材
中に存在する内部応力により緩和され、逆方向へ
そり曲ることが無く、長期にわたつて安定した取
付状態を維持出来るのである。
また、この発明の建築用板材の製造も従来使用
されている製造装置を利用して実施出来るから、
製造も容易であるなど種々の効果を有する。[Table] Rebe nutrition
Living)
In addition, in the above table, the amount of warpage is based on the case where the edge of the plate is warped from the front side to the back side, and vice versa. As is clear from the table above, the amount of expansion agent added is 4
It has been found that preferable results can be obtained when the amount is set to % or more. <Effects> Since this invention is configured as described above,
Only the surface of the board is waterproofed, and even if water is absorbed on the back side of the board, the warpage of the board is alleviated by the internal stress that already exists in the board, and it does not warp in the opposite direction, so it will last for a long time. This allows a stable installation condition to be maintained. In addition, since the construction board materials of the present invention can be manufactured using conventionally used manufacturing equipment,
It has various effects such as being easy to manufacture.
第１図はこの発明の実施例の断面図、第２図
イ，ロは他の実施例の断面図、第３図は実施例の
製造装置の一例を示す説明図、第４図はそり量測
定位置を示す説明図である。
Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 A and B are sectional views of other embodiments, Fig. 3 is an explanatory diagram showing an example of the manufacturing apparatus of the embodiment, and Fig. 4 is the amount of warpage. FIG. 3 is an explanatory diagram showing measurement positions.
Claims (1)
該層により周囲縁辺が板材の裏面方向へ反り曲る
ように全体に内部応力を生じさせて成ることを特
徴とする無機質建築用板材。 ２ 膨張剤がカルシウム、サルホアルミネート系
膨張剤を配合したセメントである特許請求の範囲
第１項記載の無機質建築用板材。 ３ 膨張剤が酸化マグネシウム系の膨張剤である
特許請求の範囲第１項記載の無機質建築用板材。[Claims] 1. Molded with an expanding agent mixed into the surface layer,
1. An inorganic architectural board material, characterized in that the layer generates internal stress throughout the peripheral edge so that it is warped toward the back surface of the board material. 2. The inorganic building board material according to claim 1, wherein the expanding agent is cement containing calcium and a sulfoaluminate-based expanding agent. 3. The inorganic building board material according to claim 1, wherein the expanding agent is a magnesium oxide-based expanding agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13060385A JPS61290152A (en) | 1985-06-14 | 1985-06-14 | Inorganic building panel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13060385A JPS61290152A (en) | 1985-06-14 | 1985-06-14 | Inorganic building panel material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61290152A JPS61290152A (en) | 1986-12-20 |
| JPH036294B2 true JPH036294B2 (en) | 1991-01-29 |
Family
ID=15038160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13060385A Granted JPS61290152A (en) | 1985-06-14 | 1985-06-14 | Inorganic building panel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61290152A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0661893B2 (en) * | 1985-09-30 | 1994-08-17 | 松下電工株式会社 | Roofing material manufacturing method |
-
1985
- 1985-06-14 JP JP13060385A patent/JPS61290152A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61290152A (en) | 1986-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |