JPH0350860B2 - - Google Patents
Info
- Publication number
- JPH0350860B2 JPH0350860B2 JP25063484A JP25063484A JPH0350860B2 JP H0350860 B2 JPH0350860 B2 JP H0350860B2 JP 25063484 A JP25063484 A JP 25063484A JP 25063484 A JP25063484 A JP 25063484A JP H0350860 B2 JPH0350860 B2 JP H0350860B2
- Authority
- JP
- Japan
- Prior art keywords
- floor
- bubbles
- self
- concrete
- base
- 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
Links
- 239000000463 material Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- 239000012756 surface treatment agent Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000839 emulsion Substances 0.000 description 8
- 238000011282 treatment Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 125000005396 acrylic acid ester group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Floor Finish (AREA)
Description
産業上の利用分野
この発明は、石こう系およびセメント系の流動
性組成物（いわゆるセルフレベリング材）をコン
クリートスラブ上に施工する際に発生する気泡に
よつて、上記組成物が硬化した後、クレーター状
に凹凸を生ずることを防止する下地処理の施工方
法に関するものである。
従来の技術
近年床施工の省力化と迅速化を目的として石こ
う系およびセメント系のセルフレベリング材を使
用することが多くなつてきた。しかし、コンクリ
ートスラブ上に流動性をもつたスラリー状のセル
フレベリング材を流したときに気泡の発生が問題
となつてきた。
発明が解決しようとする問題点
上記気泡は、下地コンクリートに生じている微
細なひび割れの中にセルフレベリング材中の水分
が浸透し、ひび割れの中の空気と置換し、空気が
気泡になつて浮上するために発生する。この浮上
した気泡の大部分は表面で破裂して、セルフレベ
リング材の表面に痕跡を残すことがないが、気泡
の発生はセルフレベリング材が硬化するまで続く
ので、硬化が始まつてから浮上した気泡は表面に
閉じ込められて凸部を形成したり、破裂をしても
クレーターを残したりすることが多い。
現在のところ、この気泡による凸部あるいはク
レーターを防止する確実な方法は見出されていな
い。例えば、下地コンクリート表面の微細なひび
割れを完全に飽水させて空気を追い出してから施
工することが提案されているが、コンクリートス
ラブ上に十分な水膜を形成することがむずかし
く、撤水量が不足したり、床に設けられている開
口部を経て水が階下に漏れたりすることがあつて
現実的ではない。
また、下地コンクリート表面のひび割れをふさ
いで気泡の発生を防止する目的でエチレン−酢酸
ビニルエマルジヨンあるいはアクリル酸エステル
エマルジヨンの水希釈液などを刷毛、デツキブラ
シ、ローラ刷毛で塗布することが試みられている
が、気泡の発生が十分に防止できていない。
したがつて、従来は、クレーターが発生した
ら、セルフレベリング材が硬化した直後（施工１
〜２日後）に、ワイヤーブラシなどで表面を切削
研磨して平滑にするなどの補修が行なわれている
のが実状である。
問題点を解決するための手段
この発明は、従来技術における上記問題点を解
決するためにセルフレベリング材をコンクリート
床またはモルタル床に施工するに当り、高分子系
下地処理剤を回転刷子を用いて床に塗布する床の
下地処理方法である。
この発明で使用する高分子系下地処理剤として
は、エチレン−酢酸ビニルエマルジヨン、アクリ
ル酸エステルエマルジヨン、スチレン−ブタジエ
ン共重合体エマルジヨン、スチレン−アクリル酸
共重合体エマルジヨン等のビニル重合体エマルジ
ヨンがあげられる。これらのビニル重合体エマル
ジヨンは原液をそのまま使用してもよいが、５〜
20％、通常10％の水希釈液を使用するのがよい。
この発明で用いる回転刷子は、下地表面に対し
て垂直方向の軸を中心として下地表面に対して平
行方向に回転する接触部を有する刷子であり、接
触部の下端が形成する回転面が下地表面に接触す
るようにして高分子系下地処理剤を塗布すること
により高分子系下地処理剤を均一に塗布すること
ができる。例えば、平面部に対して垂直方向の軸
を中心としてモーター等により回転する円盤の片
側の平面部に同じ長さの多数の剛毛を同方向に密
に植えた回転刷子を用いる場合、剛毛の先端が面
を形成するので、この面を下地表面に対して平行
にして接触させて高分子系下地処理剤を塗布す
る。
これに対して、ローラ刷子を用いる場合、下地
表面との接触点が一直線状になるので高分子系下
地処理剤を均一に塗布することが難しく、気泡の
発生を十分に防止できない。
上記回転刷子の回転数は50〜300rpmのものが
好ましい。回転刷子による下地処理は通常１回行
なえばよいが、特に入念な仕上が要求される場合
には２回塗してもよい。
上記床の下地処理によつてコンクリートスラブ
表面のひび割れがふさがれ、その後セルフレベリ
ング材を施工しても泡による凸部、クレーターの
発生がなくなり、補修作業の手間と費用を節約し
て、しかも面精度の高い床ができるという効果が
ある。
以下、実施例によつて、具体的に説明する。
実施例
下記第１表に示した配合割合の下地コンクリー
トを用いてコンクリートスラブを施工した。
Industrial Application Field The present invention is characterized in that air bubbles generated when a gypsum-based or cement-based fluid composition (so-called self-leveling material) is applied onto a concrete slab cause a crater to form after the composition has hardened. The present invention relates to a method for performing surface treatment that prevents the formation of uneven surfaces. Prior Art In recent years, gypsum-based and cement-based self-leveling materials have been increasingly used for the purpose of saving labor and speeding up floor construction. However, when a self-leveling material in the form of a fluid slurry is poured onto a concrete slab, the generation of air bubbles has become a problem. Problems to be Solved by the Invention The above bubbles are caused by the moisture in the self-leveling material penetrating into the minute cracks that have occurred in the base concrete, replacing the air in the cracks, and the air becoming bubbles and rising to the surface. occur in order to. Most of these floating bubbles burst on the surface and do not leave any traces on the surface of the self-leveling material, but since the generation of bubbles continues until the self-leveling material hardens, the bubbles may float to the surface after the self-leveling material has hardened. Bubbles often become trapped on the surface, forming convexities, or even if they burst, they leave behind craters. At present, no reliable method has been found to prevent convexities or craters caused by bubbles. For example, it has been proposed to completely saturate minute cracks on the surface of the concrete base and expel air before construction, but it is difficult to form a sufficient water film on the concrete slab and the amount of water withdrawn is insufficient. This is not practical as water may leak downstairs through openings in the floor. In addition, attempts have been made to apply ethylene-vinyl acetate emulsion or acrylic acid ester emulsion diluted with water with a brush, decking brush, or roller brush in order to seal cracks on the surface of the concrete base and prevent the formation of bubbles. However, the generation of bubbles cannot be sufficiently prevented. Therefore, conventionally, when a crater occurs, it is done immediately after the self-leveling material has hardened (in the first stage of construction).
2 days later), the actual situation is that the surface is cut and polished with a wire brush or the like to make it smooth. Means for Solving the Problems In order to solve the above-mentioned problems in the prior art, the present invention provides a method for applying a polymeric surface treatment agent using a rotating brush when applying a self-leveling material to a concrete floor or mortar floor. This is a floor preparation method that is applied to the floor. Examples of the polymer base treatment agent used in this invention include vinyl polymer emulsions such as ethylene-vinyl acetate emulsion, acrylic acid ester emulsion, styrene-butadiene copolymer emulsion, and styrene-acrylic acid copolymer emulsion. can give. These vinyl polymer emulsions may be used as they are, but if
It is best to use a 20%, usually 10%, water dilution. The rotary brush used in this invention is a brush that has a contact part that rotates in a direction parallel to the base surface around an axis perpendicular to the base surface, and the rotating surface formed by the lower end of the contact part is on the base surface. By applying the polymer base treatment agent in such a manner that it comes into contact with the substrate, the polymer base treatment agent can be applied uniformly. For example, when using a rotating brush in which many bristles of the same length are planted densely in the same direction on one side of a flat surface of a disk that is rotated by a motor or the like about an axis perpendicular to the flat surface, the tips of the bristles Since this forms a surface, the polymer base treatment agent is applied with this surface parallel to and in contact with the base surface. On the other hand, when using a roller brush, the point of contact with the base surface is in a straight line, making it difficult to uniformly apply the polymeric base treatment agent, and the generation of bubbles cannot be sufficiently prevented. The rotation speed of the rotary brush is preferably 50 to 300 rpm. The base treatment with a rotating brush usually only needs to be done once, but if a particularly careful finish is required, it may be applied twice. The above-mentioned floor preparation seals the cracks on the concrete slab surface, and even if self-leveling material is applied afterwards, there will be no protrusions or craters caused by bubbles, saving time and money on repair work, and improving the surface of the concrete slab. This has the effect of creating highly accurate floors. Hereinafter, the present invention will be specifically explained using examples. Example A concrete slab was constructed using base concrete having the mixing ratio shown in Table 1 below.
【表】
上記配合のコンクリートを用いたコンクリート
スラブの施工後１カ月経過のものを試験用下地と
して用いた。
この試験用下地の上に水を流すと無数の細い泡
が発生するのが認められた。
この試験用スラブ上に下記第２表に示すような
各種の下地処理を行ない。さらにセルフレベリン
グ材を流し、その硬化後、表面の凸部およびクレ
ーターの数を数えて比較評価した。[Table] Concrete slabs made of concrete with the above-mentioned composition, one month after construction, were used as test bases. When water was poured over this test base, it was observed that numerous fine bubbles were generated. Various surface treatments as shown in Table 2 below were performed on this test slab. Furthermore, a self-leveling material was poured, and after curing, the number of protrusions and craters on the surface was counted and evaluated comparatively.
【表】【table】
【表】
注：希釈度の欄の左側は１回目、右側は２回
目の塗布時の希釈度
発明の効果
以上説明したように、この発明によると、比較
的簡単な下地処理によつて、コンクリート床の表
面に面精度の高い仕上処理をすることができる。[Table] Note: The left side of the dilution column shows the first application, and the right side shows the dilution ratio for the second application.As explained above, according to this invention, concrete It is possible to finish the floor surface with high surface accuracy.
Claims (1)
モルタル床に施工するに当り、高分子系下地処理
剤を、床に対して垂直方向の軸を中心として床に
対して平行な回転面を有する回転刷子を用いて、
床に塗布することを特徴とする床の下地処理方
法。1. When applying a self-leveling material to a concrete floor or mortar floor, a polymeric surface treatment agent is applied using a rotating brush with a rotating surface parallel to the floor and centered on an axis perpendicular to the floor. ,
A floor preparation method characterized by applying the coating to the floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25063484A JPS61130553A (en) | 1984-11-29 | 1984-11-29 | Substrate treatment of floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25063484A JPS61130553A (en) | 1984-11-29 | 1984-11-29 | Substrate treatment of floor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61130553A JPS61130553A (en) | 1986-06-18 |
| JPH0350860B2 true JPH0350860B2 (en) | 1991-08-05 |
Family
ID=17210770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25063484A Granted JPS61130553A (en) | 1984-11-29 | 1984-11-29 | Substrate treatment of floor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61130553A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009133168A (en) * | 2007-12-03 | 2009-06-18 | Ube Ind Ltd | Concrete floor structure and its construction method |
| JP2009215812A (en) * | 2008-03-12 | 2009-09-24 | Ube Ind Ltd | Concrete floor structure and construction method therefor |
-
1984
- 1984-11-29 JP JP25063484A patent/JPS61130553A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61130553A (en) | 1986-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |