JP2607233B2 - Manufacturing method of hardened cement - Google Patents
Manufacturing method of hardened cementInfo
- Publication number
- JP2607233B2 JP2607233B2 JP62283877A JP28387787A JP2607233B2 JP 2607233 B2 JP2607233 B2 JP 2607233B2 JP 62283877 A JP62283877 A JP 62283877A JP 28387787 A JP28387787 A JP 28387787A JP 2607233 B2 JP2607233 B2 JP 2607233B2
- Authority
- JP
- Japan
- Prior art keywords
- cement
- mortar
- hardened
- mold
- kneaded material
- 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 - Fee Related
Links
- 239000004568 cement Substances 0.000 title claims description 45
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000004570 mortar (masonry) Substances 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 20
- 229920002457 flexible plastic Polymers 0.000 claims 1
- 238000007493 shaping process Methods 0.000 claims 1
- 229920003023 plastic Polymers 0.000 description 10
- 239000004033 plastic Substances 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002160 Celluloid Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明はセメント硬化体の製造方法に関し、特に表面
が平滑で気泡の著しく少ないセメント二次製品の製造方
法に関するものである。Description: TECHNICAL FIELD The present invention relates to a method for producing a cured cement body, and more particularly to a method for producing a cement secondary product having a smooth surface and extremely few bubbles.
［従来の技術］ 従来、セメント硬化体、特にセメント二次製品は、該
硬化体をそのまま、あるいは防水処理して、又はシルク
印刷やカッティングシートを貼付して模様付けし、建造
物の内外装材、案内板等として広く使用されている。[Related Art] Conventionally, a hardened cement body, particularly a cement secondary product, is used as it is, or is subjected to waterproof treatment, or is patterned by attaching a silk print or a cutting sheet, and is used as an interior / exterior material for a building. Widely used as a guide plate.
このようなセメント硬化体は、モルタル又はコンクリ
ート混練物を剥離剤を塗布した鋼板製の型枠に流し込
み、振動数約6000r.p.m.前後で振動成形し、さらに気中
養生あるいは蒸気養生させた後、脱型して製造されてい
た。Such a cement hardened product is poured into a steel plate form coated with a mortar or concrete kneaded material and coated with a release agent, and subjected to vibration molding at a frequency of about 6000 rpm, and after further curing in the air or steam, It was manufactured by removing the mold.
［発明が解決しようとする問題点］ しかし、このようなセメント硬化体の製造方法では、
セメント混練物を養生硬化させた後、硬化体を脱型する
と、たとえ剥離剤を充分均一に塗布した場合であって
も、硬化体の表層の一部が型枠側に付着して、得られる
セメント硬化体の表面に部分的な欠損が生じて、平滑度
の低い（20/1000〜50/1000mm）セメント硬化体しか得る
ことができなかった。[Problems to be Solved by the Invention] However, in such a method for producing a hardened cement body,
After curing and curing the cement kneaded material, when the cured body is released, even if the release agent is applied sufficiently uniformly, a part of the surface layer of the cured body adheres to the mold side and is obtained. The surface of the hardened cement was partially defective, and only a hardened cement with low smoothness (20/1000 to 50/1000 mm) could be obtained.
また、従来のセメント硬化体はその製造工程中におい
て振動成形しているにもかかわらず、製造されたセメン
ト硬化体の表面には比較的大きな気泡、例えば直径0.1m
m以上の気泡が90〜220個/100cm2も生成したりする。そ
のため、製造されたセメント硬化体を前述の用途に用い
る場合には、脱型したセメント硬化体の表面をセメント
ペーストあるいはモルタルを使用して、平滑に補修しな
ければならないという問題点があった。In addition, despite the fact that the conventional cement hardened body is subjected to vibration molding during the manufacturing process, relatively large air bubbles are formed on the surface of the manufactured hardened cement body, for example, a diameter of 0.1 m.
90 to 220 bubbles / m 2 or more / 100 cm 2 may be generated. Therefore, when the manufactured hardened cement body is used for the above-mentioned purpose, there is a problem that the surface of the demolded hardened cement body must be repaired smoothly using a cement paste or mortar.
［問題点を解決するための手段］ 本発明者らは上記の問題点を解消するために、型枠内
面の材質、セメント混練物の柔らかさ、振動成形時の振
動数との相互関連性について鋭意研究した結果、表面が
平滑、かつ、気泡が殆ど生成しないセメント硬化体の製
造方法を見い出し、本発明を完成するに至った。[Means for Solving the Problems] In order to solve the above problems, the present inventors have investigated the interrelationship between the material of the inner surface of the mold, the softness of the cement kneaded material, and the vibration frequency during vibration molding. As a result of intensive studies, they have found a method for producing a hardened cement body having a smooth surface and almost no air bubbles, and have completed the present invention.
すなわち、本発明の要旨は、平滑、かつ、可撓性を有
するプラスチック板を内面に配設した型枠に、フロー値
が170以上のセメントペースト若しくはモルタル又はモ
ルタル部分のフロー値が170以上であるコンクリートか
らなるセメント混練物を流し込み、振動数3000r.p.m.以
上で振動成形し養生することを特徴とするセメント硬化
体の製造方法である。That is, the gist of the present invention is that, in a mold in which a plastic plate having smoothness and flexibility is arranged on an inner surface, a flow value of a cement paste or mortar or a mortar portion having a flow value of 170 or more is 170 or more. This is a method for producing a hardened cement, characterized in that a cement kneaded material made of concrete is poured, and is vibrated and cured at a vibration frequency of 3000 rpm or more.
［発明の具体的説明］ 本発明のセメント硬化体の製造方法において用いられ
る型枠としては、鋼製、木製等で作られた型枠の内面に
プラスチック板が配設されたものが使用される。[Specific description of the invention] As a mold used in the method for producing a hardened cement body of the present invention, a mold in which a plastic plate is disposed on the inner surface of a mold made of steel, wood, or the like is used. .
該型枠には後記セメント混練物が流し込まれ、気中養
生あるいは蒸気養生させて硬化させる。The cement kneaded material described later is poured into the mold, and cured by aerial curing or steam curing.
配設されたプラスチック板は、セメント混練物が硬化
した後、前記鋼製等の型枠を取り外し、セメント硬化体
の端部から剥離される。そのためプラスチック板は、セ
メント混練物と接する側（すなわち内側）が平滑である
こと、プラスチック板をセメント硬化体から剥離する際
に付着による前記部分的欠損が生じないこと並びに剥離
作業を容易にするために可撓性を具備していることが重
要である。After the cement kneaded material is hardened, the disposed plastic plate is detached from the end of the hardened cement body by removing the steel mold or the like. Therefore, the plastic plate has a smooth surface (that is, the inside) in contact with the cement kneaded material, does not cause the partial loss due to adhesion when peeling the plastic plate from the hardened cement, and facilitates the peeling operation. It is important to have flexibility.
そのような条件を有するプラスチック板の材質として
は、アクリル樹脂、塩化ビニール樹脂、ポリエチレン樹
脂その他セルロイド等が挙げられる。プラスチック板の
平滑度は、1/1000mm以下であることが望ましく、その厚
さは0.1mm以上，加工性、コスト等を考慮すれば0.2〜5m
m程度が好ましい。Examples of the material of the plastic plate having such conditions include acrylic resin, vinyl chloride resin, polyethylene resin, and celluloid. The smoothness of the plastic plate is desirably 1/1000 mm or less, the thickness is 0.1 mm or more, and 0.2 to 5 m in consideration of workability and cost.
m is preferred.
セメント硬化体の表面に0.1mm以上の気泡が生成する
ことを改善するには、セメント混練物の軟度および打設
時に与える振動数が重要な因子である。In order to improve the generation of air bubbles of 0.1 mm or more on the surface of the hardened cement, the softness of the cement kneaded material and the frequency applied during casting are important factors.
すなわち、セメント混練物がセメントペースト又はモ
ルタルの場合には、それぞれセメントペースト又はモル
タルのフロー値が、又コンクリートの場合には粗骨材を
除いたモルタルの部分（以下これらを総称して「モルタ
ル部分」という）のフロー値がJIS R 5201の測定法で測
定したとき、少なくとも170を有していることが肝要で
あり、好ましくは200〜280である。フロー値が170未満
であると、セメント硬化体の表面に径の大きい、例えば
1mm以上のオープン気泡ができる場合があるので好まし
くない。That is, when the cement mixture is cement paste or mortar, the cement paste or mortar has a flow value of the cement paste or mortar, and in the case of concrete, the mortar portion excluding coarse aggregate (hereinafter collectively referred to as “mortar portion”). It is important that the flow value has a value of at least 170 when measured by the measurement method of JIS R 5201, and preferably 200 to 280. If the flow value is less than 170, a large diameter on the surface of the cement hardened body, for example,
It is not preferable because open bubbles of 1 mm or more may be formed.
前記セメント混練物はセメントペースト、モルタル又
はモルタルと粗骨材からなる混練物が用いられるが、一
般にセメントの配合剤として知られる急結剤、保水剤、
高性能減水剤などを配合することもできる。The cement kneaded material is a cement paste, a mortar or a kneaded material composed of mortar and coarse aggregate is used, a quick setting agent generally known as a compounding agent for cement, a water retention agent,
A high-performance water reducing agent or the like can be added.
振動成形する際の振動数は3000r.p.m.以上が必要であ
る。3000r.p.m.未満では0.2〜0.5mmの比較的小さい気泡
が無数にできるので好ましくない。望ましい振動数は60
00〜9000r.p.m.である。The vibration frequency at the time of vibration molding needs to be 3000 rpm or more. If it is less than 3000 rpm, relatively small bubbles of 0.2 to 0.5 mm can be formed innumerably, which is not preferable. Desired frequency is 60
00 to 9000 rpm.
次に本発明にしたがったモルタル硬化体の場合につい
ての製造方法を説明する。Next, a method for producing a cured mortar according to the present invention will be described.
鋼板製の外型枠を組立て、その内面に所定厚さのプラ
スチック板を配設し、内寸法が所望の寸法になるように
型可を作り、これに予めフロー値が170以上に調整され
たモルタル混練物を設計厚さになるように流し込み、振
動数3000r.p.m.以上で振動成形し、浮き水を排出し、慣
用の方法で養生した後、まず鋼板型枠を取り外し、次い
で、プラスチック板をモルタル硬化体から剥離するよう
にして取り外す。Assembling a steel plate outer mold, arranging a plastic plate of a predetermined thickness on its inner surface, making a mold so that the inner dimension becomes a desired dimension, and the flow value was adjusted to 170 or more in advance in this Pour the mortar kneaded material to the designed thickness, vibrate at a frequency of 3000 rpm or more, discharge the floating water, cure by a conventional method, first remove the steel plate form, then remove the plastic plate Remove it by peeling it from the mortar cured product.
得られたモルタル硬化体は、表面が平滑で気泡発生が
著しく改善されている。The obtained mortar cured product has a smooth surface and remarkably improved bubble generation.
なお、前記設計厚さが厚い場合には、経済性を考慮し
て、ある厚さにモルタル混練物を流し込み振動成形した
後、引き続き全厚さが所要の厚さになるように慣用配合
のコンクリート混練物を、流し込み成形あるいは振動成
形してもよい。When the design thickness is large, in consideration of economy, after mortar kneaded material is poured into a certain thickness and subjected to vibration molding, the concrete of the conventional composition is continuously adjusted so that the entire thickness becomes a required thickness. The kneaded material may be cast or vibrated.
また、プラスチック板の配設は必ずしも型枠全体に行
わなくても、得られる硬化体の表面平滑度を必要とする
部分にのみ行なってもよい。In addition, the plastic plate may not necessarily be disposed on the entire mold, but may be disposed only on a portion of the obtained cured product that requires surface smoothness.
［実施例］ 実施例１〜５及び比較例１〜２ グリースを塗布した鋼製型枠の内部底面に厚さ2mmの
アクリル樹脂板を配設し、内寸100×100×4cmの型枠を
作った。[Examples] Examples 1 to 5 and Comparative Examples 1 and 2 An acrylic resin plate having a thickness of 2 mm was disposed on the inner bottom surface of a steel mold to which grease was applied, and a mold having an inner size of 100 × 100 × 4 cm was formed. Had made.
一方、普通ポルトランドセメント（日本セメント社
製）及び砂（秩父鉱業社製「珪砂」）を重量比で1:3に
配合したものに第１表に示すフロー値になるように水を
添加し、それぞれのモルタル混練物を得た。On the other hand, water was added to a mixture of ordinary Portland cement (manufactured by Nippon Cement Co., Ltd.) and sand ("Quartz Sand" manufactured by Chichibu Mining Co., Ltd.) at a weight ratio of 1: 3, so that the flow value shown in Table 1 was obtained, Each mortar kneaded material was obtained.
そのモルタル混練物を前記型枠に厚さ4cmに流し込ん
だ後、直ちに同表に示す振動数で振動成形し、20℃、相
対湿度60％R.Hの条件下で24時間静置して養生させた。Immediately after pouring the mortar kneaded material into the mold to a thickness of 4 cm, it was subjected to vibration molding at the frequency shown in the same table, and left to cure at 20 ° C. and a relative humidity of 60% RH for 24 hours. .
その後、鋼製型枠を外した後、モルタル硬化体面に貼
り付いているアクリル樹脂板をゆっくりと剥し取った。
その剥離されたモルタル硬化体の面について、顕微鏡を
用いて100cm2当りに存在する直径0.1mmの以上の気泡の
数をかぞえ、JIS B 0651「触針式表面粗さ測定器」に規
定された測定器を用いて、平滑度を測定し、得られたそ
れぞれの結果を同表に併記した。Then, after removing the steel mold, the acrylic resin plate stuck to the mortar cured body surface was slowly peeled off.
For the surface of the peeled mortar hardened body, using a microscope, counting the number of air bubbles with a diameter of 0.1 mm or more per 100 cm 2 , specified in JIS B 0651 `` Stylus type surface roughness measuring instrument '' The smoothness was measured using a measuring instrument, and the obtained results are also shown in the same table.
［発明の効果］ 本発明のセメント硬化体の製造方法によって製造され
たセメント硬化体は、従来のセメント硬化体の製造方法
によって製造されるセメント硬化体に比して、その表面
の気泡数が著しく低減されており、かつ、平滑度が格段
に改善される。 [Effect of the Invention] The hardened cement manufactured by the method for manufacturing a hardened cement of the present invention has a remarkable number of bubbles on the surface thereof as compared with the hardened cement manufactured by the conventional method for manufacturing a hardened cement. It is reduced and the smoothness is remarkably improved.
その結果、本発明で製造した該セメント硬化体はその
まま外装材として使用することもでき、また、色々な模
様の印刷も鮮明にできるなどの利点があり、セメント製
品の価値を高めることができるので、工業的に極めて有
益な方法である。As a result, the cement hardened body produced by the present invention can be used as an exterior material as it is, and there are advantages such as clear printing of various patterns, and the value of the cement product can be enhanced. This is an extremely useful method industrially.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−174105（ＪＰ，Ａ) 特公 昭51−5650（ＪＰ，Ｂ２) 社団法人 日本コンクリート工学協会 編、「コンクリート便覧」、技報堂出版 株式会社、昭和53年、Ｐ．389〜393 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-174105 (JP, A) JP-B-51-5650 (JP, B2) Japan Concrete Institute, edited by “Concrete Handbook”, Gihodo Publishing Co., Ltd. Company, 1978, P. 389-393
Claims (1)
板を内面に配設した型枠に、フロー値が170以上のセメ
ントペースト若しくはモルタル又はモルタル部分のフロ
ー値が170以上であるコンクリートからなるセメント混
練物を流し込み、振動数3000r.p.m.以上で振動成形し養
生することを特徴とするセメント硬化体の製造方法。1. A mold in which a smooth and flexible plastic plate is disposed on the inner surface is made of cement paste or mortar having a flow value of 170 or more or concrete having a mortar portion having a flow value of 170 or more. A method for producing a hardened cement, characterized by pouring a cement kneaded material, shaping at a vibration frequency of 3000 rpm or more, and curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62283877A JP2607233B2 (en) | 1987-11-10 | 1987-11-10 | Manufacturing method of hardened cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62283877A JP2607233B2 (en) | 1987-11-10 | 1987-11-10 | Manufacturing method of hardened cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01125202A JPH01125202A (en) | 1989-05-17 |
| JP2607233B2 true JP2607233B2 (en) | 1997-05-07 |
Family
ID=17671334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62283877A Expired - Fee Related JP2607233B2 (en) | 1987-11-10 | 1987-11-10 | Manufacturing method of hardened cement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2607233B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021127648A (en) * | 2020-02-17 | 2021-09-02 | 三菱マテリアル株式会社 | Specimen preparation method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5324660B2 (en) * | 1974-07-05 | 1978-07-21 | ||
| JPS62174105A (en) * | 1986-01-29 | 1987-07-30 | 旭化成株式会社 | Manufacture of double layer panel |
-
1987
- 1987-11-10 JP JP62283877A patent/JP2607233B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 社団法人 日本コンクリート工学協会編、「コンクリート便覧」、技報堂出版 株式会社、昭和５３年、Ｐ．３８９〜３９３ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01125202A (en) | 1989-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |