JP4366473B2 - Finished structure of reinforced concrete members - Google Patents
Finished structure of reinforced concrete members Download PDFInfo
- Publication number
- JP4366473B2 JP4366473B2 JP08319899A JP8319899A JP4366473B2 JP 4366473 B2 JP4366473 B2 JP 4366473B2 JP 08319899 A JP08319899 A JP 08319899A JP 8319899 A JP8319899 A JP 8319899A JP 4366473 B2 JP4366473 B2 JP 4366473B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- reinforced concrete
- mortar
- reinforcing sheet
- finished structure
- 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
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Description
【０００１】
【発明の属する技術分野】
補強コンクリート分野において、仕上げ構造に関する分野に属するものである。
【０００２】
【従来の技術】
従来、補強コンクリート部材の仕上げ構造は、補強用シート表面にエポキシ樹脂を塗布し、そして、仕上げ層との付着力を高めるため、硬化前にけい砂を吹きつけ、突起体を設けて下地層を形成し、硬化後、仕上げ材としてメタルラスを塗り込んだモルタルを塗り付け仕上げ層を形成したものがあった。また、補強用シートのＦＲＰ化後、その上からプライマーを塗り、硬化後せっこうボード貼付用ボンドを塗り付け、その上にせっこうボードを貼り付けた構造も一般的に用いられていた。
【０００３】
しかし、このような構造では、材料コストが多くかかることや、養生に時間を要し、工期が長くなるといった点や工程が多いという課題があった。この発明は、このような課題を解決するために提案されたもので作業工程を減らして工期短縮、コスト削減ができることを目的とするものである。
【０００４】
【課題を解決するための手段】
本発明は、コンクリート部材表面に高強度繊維からなる補強用シートが配置され、該シートの表面が、該シートの繊維に含浸するとともに表面に多数の突起体が設けられたエポキシ樹脂、ポリエステル樹脂、もしくはポリウレタン樹脂からなる下地層で覆われており、その上に仕上げ層が設けられた事を特徴とする補強コンクリート部材の仕上げ構造である。
【０００５】
本発明の補強方法は、角筒形または円筒形だけでなく、梁や壁、床部材などのコンクリート部材にも適用できる。本発明で補強用シートに含浸させる樹脂は、エポキシ樹脂、ポリエステル樹脂、ポリウレタン樹脂などが挙げられ、２液混合型常温硬化型樹脂が施工時の温度管理の面などから施工性がよく好ましい。また、樹脂の粘性は、セピオライトなどの繊維状粘度鉱物や、ガラス繊維などで高めることができるし、樹脂塗布後、時間を置いてゲル化の進行を待って高める方法がある。そして、ローラー、くし目ごてなどを使って波形状や、碁盤目状、千鳥模様状、横模様状、縦模様状などに目荒らしを行うことにより設けられる突起体は粘性が高いほど形成しやすいが、施工のしやすさを考慮すると粘度が２０Ｐａ・ｓｅｃ〜２００Ｐａ・ｓｅｃ程度のものが好ましい。
【０００６】
本発明の突起体は部分的に設けても、モルタルに対してアンカー効果を発揮し接着力を上げるが、より高い接着力を得るためには下地層全面に設けたほうがより好ましい。
【０００７】
【実施の形態】
以下に本発明を図面に基づいて詳細に説明する。図１は、本発明の実施例１の補強構造を示す断面図である。コンクリート部材１に、必要であれば、表面の段差をなくすなどの下地処理や、接着剤の接着力をよくするためにプライマー処理を行う。その後、接着剤を介して補強用シート２を貼付け、さらに接着剤を上塗りし、十分含浸させた後、この接着剤が硬化する前に３のようにローラー、くし目ごてなどを使って波形状や、碁盤目状、千鳥模様状、横模様状、縦模様状などに目荒らしを行い、表面に突起体を設け、硬化後、モルタル４で仕上げ層を形成する。
【０００８】
図２は、本発明の実施例２の補強構造を示す断面図である。コンクリート部材１に、必要であれば、下地処理、プライマー処理を行う。その後、接着剤で補強用シート２を貼付け、さらに接着剤を上塗りし、十分含浸させた後、この接着剤が硬化する前に３と同様にローラー、くし目ごてなどを使って波形状や、碁盤目状、千鳥模様状、横模様状、縦模様状などに目荒らしし、硬化後、せっこうボード貼付用ボンド５でせっこうボード６を貼り付けて形成する。
【０００９】
この実施例１において、モルタルとの接着強度を測定した。また、比較例１として、接着剤表面の目荒らしを行わず、モルタルで仕上げ層を形成したもの、比較例２として、従来の施工方法によりモルタルで仕上げ層を形成したものについても同様に測定した。試験結果を、表１に示す。表１から、実施例１は、接着剤表面を硬化前に、ローラー、くし目ごてなど使って波形状や、碁盤目状、千鳥模様状、横模様状、縦模様状などに目荒らしを行い表面に突起体を設けることにより、比較例１の接着剤表面の目荒らしを行わない状態よりモルタルの接着強度が約２５％上昇した。また、比較例２の従来の施工法によるモルタルの接着強度と比較すると、約１０％上昇した。実施例１のように補強用シートを上塗りされた接着剤の表面をローラーがけなどにより目荒らしすることにより接着力が向上し、破壊形状も樹脂−モルタル界面剥離から仕上げモルタル破壊へと改善された。
【００１０】
【表１】
【発明の効果】
本発明によれば、仕上げ層を設けるために、新たに接着剤や、プライマーを塗布するといった施工工程が削減でき、材料、施工コスト削減、施工工期の短縮が図れる。粘性の高い接着剤を使用することにより、突起体が容易に形成できる。突起体が一体的に盛り上がった下地層を形成する際に、ローラー、こてなどを使用することにより補強用シート全体に接着剤を含浸させると共に脱泡することが出来る。
【図面の簡単な説明】
【図１】本発明の補強構造の１例のうち補強用シートをローラー等で目荒らしした下地層を持つ場合の断面図。
【図２】本発明の補強構造の１例のうち補強用シートをローラー等で目荒らしした下地層を持ち、石こうボードで仕上げた場合の断面図。
【符号の説明】
１ コンクリート部材
２ 補強用シート
３ ローラーによって目荒らしした下地層
４ 仕上げモルタル
５ 石こうボード貼付用ボンド
６ 石こうボード[0001]
BACKGROUND OF THE INVENTION
In the field of reinforced concrete, it belongs to the field related to finished structures.
[0002]
[Prior art]
Conventionally, the finishing structure of reinforced concrete members has been applied with epoxy resin on the surface of the reinforcing sheet, and in order to increase the adhesion to the finishing layer, silica sand is blown before curing, and protrusions are provided to form the ground layer. After forming and curing, there was one in which a finishing layer was formed by applying mortar coated with metal lath as a finishing material. Further, a structure in which a reinforcing sheet is made into FRP, a primer is applied from above, a gypsum board bonding bond is applied after curing, and a gypsum board is applied thereon is generally used.
[0003]
However, in such a structure, there are problems that the material cost is high, the curing takes time, and the construction period is long. The present invention has been proposed in order to solve such a problem, and has an object to reduce the work process and shorten the work period and cost.
[0004]
[Means for Solving the Problems]
The present invention provides an epoxy resin, a polyester resin, in which a reinforcing sheet made of high-strength fibers is disposed on the surface of a concrete member, the surface of the sheet impregnates the fibers of the sheet, and a plurality of protrusions are provided on the surface. Or it is the finishing structure of the reinforced concrete member characterized by being covered with the base layer which consists of polyurethane resins, and having provided the finishing layer on it.
[0005]
The reinforcing method of the present invention can be applied not only to a rectangular tube shape or a cylindrical shape but also to a concrete member such as a beam, a wall, or a floor member. Examples of the resin impregnated in the reinforcing sheet in the present invention include an epoxy resin, a polyester resin, and a polyurethane resin, and a two-component mixed type room temperature curable resin is preferable because it has good workability from the viewpoint of temperature control during construction. Further, the viscosity of the resin can be increased with a fibrous viscosity mineral such as sepiolite, glass fiber, or the like, and there is a method of increasing the time after the resin is applied and waiting for the progress of gelation. And the protrusions provided by roughing the wave shape, grid pattern, staggered pattern, horizontal pattern, vertical pattern, etc. using rollers, comb irons, etc., are formed as the viscosity increases. Although it is easy, the viscosity is preferably about 20 Pa · sec to 200 Pa · sec in consideration of ease of construction.
[0006]
Even if the protrusions of the present invention are partially provided, they exert an anchoring effect on the mortar and increase the adhesive force, but it is more preferable to provide the entire surface of the underlayer in order to obtain a higher adhesive force.
[0007]
Embodiment
Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a reinforcing structure of
[0008]
FIG. 2 is a cross-sectional view showing a reinforcing structure of Example 2 of the present invention. If necessary, the
[0009]
In Example 1, the adhesive strength with mortar was measured. Further, as Comparative Example 1, the surface of the adhesive was not roughened and the finishing layer was formed with mortar, and as Comparative Example 2, the finishing layer was formed with mortar by the conventional construction method, and the measurement was performed in the same manner. . The test results are shown in Table 1. From Table 1, Example 1 shows that the surface of the adhesive is roughened into a wave shape, a grid pattern, a staggered pattern, a horizontal pattern, a vertical pattern, etc., using a roller, a comb iron, etc. before curing. By providing protrusions on the surface, the adhesive strength of the mortar was increased by about 25% from the state in which the adhesive surface of Comparative Example 1 was not roughened. Moreover, when compared with the adhesive strength of the mortar by the conventional construction method of the comparative example 2, it rose about 10%. The adhesive force was improved by roughening the surface of the adhesive coated with the reinforcing sheet as in Example 1 with a roller, and the fracture shape was also improved from the resin-mortar interface peeling to the finished mortar fracture. .
[0010]
[Table 1]
【The invention's effect】
According to the present invention, since a finishing layer is provided, a construction process such as newly applying an adhesive or a primer can be reduced, and the material, construction cost, and construction period can be shortened. By using a highly viscous adhesive, the protrusion can be easily formed. When forming the base layer in which the protrusions are integrally raised, the entire reinforcing sheet can be impregnated and defoamed by using a roller, a trowel or the like.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an example of a reinforcing structure according to the present invention having a base layer in which a reinforcing sheet is roughened with a roller or the like.
FIG. 2 is a cross-sectional view of an example of a reinforcing structure according to the present invention in which a reinforcing sheet has a base layer roughened with a roller or the like and finished with a gypsum board.
[Explanation of symbols]
DESCRIPTION OF
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08319899A JP4366473B2 (en) | 1999-03-26 | 1999-03-26 | Finished structure of reinforced concrete members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08319899A JP4366473B2 (en) | 1999-03-26 | 1999-03-26 | Finished structure of reinforced concrete members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000274045A JP2000274045A (en) | 2000-10-03 |
| JP4366473B2 true JP4366473B2 (en) | 2009-11-18 |
Family
ID=13795639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08319899A Expired - Lifetime JP4366473B2 (en) | 1999-03-26 | 1999-03-26 | Finished structure of reinforced concrete members |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4366473B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4674721B2 (en) * | 2006-01-27 | 2011-04-20 | 清水建設株式会社 | Method for joining concrete members |
| JP2010106490A (en) * | 2008-10-29 | 2010-05-13 | Toda Constr Co Ltd | Method of manufacturing precast concrete plate |
-
1999
- 1999-03-26 JP JP08319899A patent/JP4366473B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000274045A (en) | 2000-10-03 |
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