JPS6253666B2 - - Google Patents
Info
- Publication number
- JPS6253666B2 JPS6253666B2 JP56201144A JP20114481A JPS6253666B2 JP S6253666 B2 JPS6253666 B2 JP S6253666B2 JP 56201144 A JP56201144 A JP 56201144A JP 20114481 A JP20114481 A JP 20114481A JP S6253666 B2 JPS6253666 B2 JP S6253666B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- fibers
- fiber sheet
- dimensional mesh
- mesh fiber
- 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
- 239000004567 concrete Substances 0.000 claims description 72
- 239000000835 fiber Substances 0.000 claims description 53
- 239000000463 material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000004745 nonwoven fabric Substances 0.000 claims description 9
- 239000002344 surface layer Substances 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000002759 woven fabric Substances 0.000 claims description 3
- 229920002972 Acrylic fiber Polymers 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims description 2
- 229920002978 Vinylon Polymers 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000011490 mineral wool Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 239000002964 rayon Substances 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000011083 cement mortar Substances 0.000 claims 1
- 239000011509 cement plaster Substances 0.000 claims 1
- 238000009415 formwork Methods 0.000 description 24
- 239000004570 mortar (masonry) Substances 0.000 description 23
- 239000010410 layer Substances 0.000 description 20
- 238000010276 construction Methods 0.000 description 14
- 206010040844 Skin exfoliation Diseases 0.000 description 10
- 229920003002 synthetic resin Polymers 0.000 description 8
- 239000000057 synthetic resin Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000005336 cracking Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000839 emulsion Substances 0.000 description 3
- 239000011120 plywood Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011505 plaster Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Description
この発明はコンクリート躯体の表面層を繊維強
化すると共に、コンクリート躯体の表面に施工し
た仕上げ材と躯体との付着力を増進し、仕上げ材
の亀裂、剥離又は剥落を未然に防止することを目
的としたコンクリート躯体の表面処理方法に関す
るものである。
一般にコンクリート構造物は、コンクリート型
枠脱型後、モルタルを施工して平滑とし、その上
にタイル張りや、吹きつけ材料（以下「最終仕上
げ材」という。）の吹きつけ工事を行うのが一般
的である。このような施工方法においては、コン
クリート躯体とモルタル層、モルタル層と最終仕
上げ材との２ケ所に接着界面が生ずるが、この内
モルタルと最終仕上げ材との接着は、色々な工法
が開発され、その界面は強固に接着されている。
一方コンクリート躯体とモルタル層との接着につ
いては未だ不十分であり、表面仕上げ材の亀裂、
剥離又は剥落の事故を生じる恐れがある。特にコ
ンクリート躯体層が緻密でなく、表面層の強度が
低い場合には、表面仕上げ材層のムーブメントに
伴う応力発生や、コンクリート躯体の鉄筋の発錆
膨張に伴う応力発生により、表面仕上げ層の亀
裂、剥離、剥落を生じ易い。
現在、躯体とモルタル層の接着に関し、躯体表
面の目荒し、合成樹脂エマルジヨンの塗布又は混
和剤入りノロ引きなどが行われているが、これら
の方法では表面仕上げ層の亀裂、剥離又は剥落の
発生を防止することは不可能に近く、更にその改
善が要請されている。コンクリート表面層の強度
不足による表面仕上げ層の亀裂、剥離又は剥落の
発生防止に対しては、上記の在来工法は殆んど効
果がない。また在来のコンクリート打設技術で
は、得られるコンクリート躯体の表面部の強度が
弱く、このことはコンクリート躯体の耐久性を考
える上で、今日、非常に重要な課題となつてい
る。
然るにこの発明は、耐アルカリ、耐水性繊維か
らなる立体網目状繊維シートを型枠板の内面に仮
止めし、これを用いて構成した型枠内へコンクリ
ートを打設するので、コンクリート中の水硬性セ
メントスラリーが立体網目状繊維シート層に浸透
してコンクリートと立体網目状繊維シートが一体
となり、コンクリート表面部へ埋設された立体網
目状繊維シートはコンクリートを強化すると共
に、コンクリート表面部へ露出された立体網目状
繊維シートは毛羽立ち状となり、モルタル層のア
ンカーとなるので、モルタル施工後、モルタル層
が亀裂、剥離又は剥落するおそれがなく、モルタ
ルなどの表面仕上げ材とコンクリート躯体とを強
固に接着して、前記在来の問題点を解決したので
ある。
この発明の特徴は、コンクリート躯体の表面層
を繊維強化すると共に、繊維をアンカーにしてモ
ルタルなどの表面仕上げ層をコンクリート躯体に
物理的・機械的に接着するものである。すなわ
ち、下地となるコンクリート表面層の強化と、表
面仕上げ層とコンクリート躯体とのケミカルボン
ドとメカニカルボンドの相乗効果により、接着の
確実性が高く、施工後モルタル層が熱や水分で膨
張収縮して、コンクリートとモルタルの界面で剪
断力や引張力が働いても、繊維のアンカー効果で
応力が緩和され、剥離が極めて少くなる。万一剥
離しても表面仕上げ層の剥落には至らないと共
に、コンクリート表面層および表面仕上げ層も繊
維により結合されている。
コンクリート表面部の繊維強化を高めるに当つ
ては、コンクリートの打設時にバイブレーターを
使用することは極めて有効である。特に、型枠設
置型のバイブレーターの使用は、立体網目状繊維
シート層内へのコンクリートの浸透を容易にする
と共に、コンクリートの余剰水が立体網目状繊維
シートの吸水、通水効果により外部へ排出される
ので、コンクリートの強度は大幅に向上する。立
体網目状繊維シートに吸水されたコンクリートの
余剰水は型枠のジヨイント部から排出されるが、
型枠に水抜き穴を適当な間隔で設けることによ
り、コンクリートの余剰水がより効果的に排出さ
れることは言うまでもない。
又、他の特徴としては材料費が安く、施工がき
わめて簡単で経済的な工法である。すなわち立体
網目状繊維シートを型枠板の内面にホツチキス針
又は両面粘膜テープで仮止めし、これにより構成
したコンクリート型枠内へコンクリートを打設す
るだけで良く、剥離剤塗布に代えて立体網目状繊
維シートを仮止めするので、従来法に比べ費用労
力を特に必要とするものではない。またコンクリ
ートが硬化後、コンクリート表面にモルタルを施
工する時は、従来の施工法と同じく水養生を行う
か、稀釈したエマルジヨンを塗布したのちモルタ
ルを施工する。この発明に用いる耐アルカリ、耐
水性繊維としては、アクリル繊維、ポリプロピレ
ン繊維、ポリエステル繊維、ナイロン繊維、ビニ
ロン繊維、レイヨン繊維、芳香族ポリアミド繊
維、炭素繊維、芳香族ポリアミド繊維、炭素繊
維、ガラス繊維、石綿繊維、岩綿繊維などの耐ア
ルカリ、耐水性繊維の単独あるいは、前記２以上
の繊維を併用し、耐アルカリ、耐水性繊維シート
として不織布、織布、編布又はモノフイラメント
絡合体としたものが用いられる。これらのうち、
繊維が絡み合つて立体的な空げき目を有する点
で、不織布およびモノフイラメント絡合体が好適
である。
不織布は、コンクリート表面部を１〜55mm程度
の深さにわたつて補強する場合に用いる。不織布
の製造法としては、浸漬法、ニードルパンチ法、
スパンボンド法、ステツチ法などがあり、いずれ
も適している。また織布あるいは編布と不織布と
を組合わせて上記立体網目状繊維シートで構成し
てもよく、この場合も良好な効果を上げることが
できる。
モノフイラメト絡合体は、コンクリート表面部
を５〜40mm程度の深さにわたつて補強する場合に
用いる。直径0.1mm以上で、かつ３次元クリンプ
を有する合成樹脂モノフイラメントを３次元に交
絡し、絡合部を接合してなる５〜40mmの見掛け厚
みをもつ合成樹脂モノフイラメント絡合体が好適
である。モノフイラメント絡合体は、剛性が高い
ことが望ましい。モノフイラメントの直径が0.1
mm未満の場合には、剛性が低いためにコンクリー
トの打設圧によつてモノフイラメント絡合体が圧
縮されるので、コンクリートのモノフイラメント
への充填が悪くなる。またバイブレーターを使用
しても、振動の伝達が悪いので、コンクリートの
モノフイラメントへの充填は余り改善されない。
従つて、直径0.1mm以上の合成樹脂モノフイラメ
ントの絡合体の使用が望ましい。
絡合体を構成するモノフイラメントは、長繊維
でも短繊維でも特に指定するものではないが、絡
合体の機械的特性面から25mm以上250mm以下が望
ましく、また異なる繊維長のものを混合し、使用
してもさしつかえない。
絡合体を構成する三次元クリンプを有するモノ
フイラメントとは、仮撚加熱法、ロープ加熱法、
潜在けん縮法、および擦過法などにより三次元ク
リンプを付与したモノフイラメントであり、特に
仮撚加熱法およびロープ加熱法などの方法による
ものが望ましい。
絡合部を接合する方法は、絡合体を噴霧法、浸
漬法などにより接着剤処理を行い、後に乾燥、熱
処理することにより接着剤を硬化し、接合する方
法および絡合体を構成するモノフイラメントの一
部に低融点素材からなるモノフイラメントを使用
するか、もしくはモノフイラメントの一部または
全部を融点の異なる複数種の素材からなる複合モ
ノフイラメントを使用し、交絡後、熱処理を行う
ことにより低融点素材を溶融し絡合部を接合する
方法などがある。
合成樹脂モノフイラメントの素材は、ポリアミ
ド、ポリエステル、ポリオレフイン、ポリ塩化ビ
ニルおよびポリ塩化ビニリデンなどの合成樹脂が
あるが、これらの合成樹脂の単独使用、もしくは
混合使用のいずれかでも良い。
立体網目状繊維シートの型枠板への取り付け
は、立体網目状繊維シートがコンクリート打設時
に脱落せず、脱型時に型枠板から容易に剥離する
事が必要であり、合板型枠の時は建築用ホツチキ
ス針で仮止めし、メタル型枠の時は両面粘着テー
プで部分接着を行う。立体網目状繊維シートとし
ては、ある程度腰のあるものが施工が容易であ
る。型枠板に仮止めする際、フクレが生ずるとコ
ンクリート打設の際、脱落の恐れがあるので型枠
板面によくなじむように仮止めする。
モルタルの施工については、従来の工法と何ら
変らない。すなわち、下地の水養生又はエマルジ
ヨンの塗布などを行つて施工したモルタル層のド
ライアウトを防ぐ事が必要で、繊維のアンカーに
よるメカニカルボンドのみでは強度が小さいの
で、モルタル本来のケミカルボンドも最大限に出
るようにしなくてはならない。モルタルの配合
は、セメント砂比を１：２〜１：３（容積）と
し、あまり富配合や貧配合は好ましくない。な
お、コンクリートの表面を施工に先だち施工面を
ワイヤーブラシなどでこすり、表面の毛羽立ちを
より多くする事はより好ましい事である。前記に
おいては、表面仕上げ材としてモルタルについて
説明したが、モルタルの他、しつくい、プラスタ
ー、又は厚付塗料などの吹付材の施工についても
同様である。
この発明の他の利点は、コンクリート型枠がコ
ンクリートのノロで汚れにくく、清掃がきわめて
容易である事、コンクリート型枠には剥離剤を塗
布する必要がない事などである。型枠板の種類と
しては、合板型枠、メタル型枠、合成樹脂型枠の
いずれも可能である。
この発明は現場施工に適しているのみならず、
プレキヤストパネル、又はプレキヤストユニツト
などのコンクリート製品を工場生産する際にも用
いることができる。
即ちこの発明によれば、立体網目状繊維シート
を型枠板面に仮着し、これを用いてコンクリート
型枠を構成した後、コンクリートを打設し、脱型
後繊維露出面へ仕上げ材を施工するので、躯体と
仕上げ材とは機械的、物理的、化学的力により強
固に接着すると共に、コンクリート表面部および
仕上げ材層を補強するなどの効果がある。然して
施工労力、材料、時間等は従来法と大差はなく、
仕上げ材の亀裂、剥離、剥落を未然に防止するこ
とができると共に、コンクリート構造物の耐久性
を大幅に向上することができる。
次にこの発明の比較実験例につき説明する。
実験例
目つけ80ｇ／m2のポリプロピレン繊維よりなる
不織布２を合板製の型枠板１の内面に建築用ホツ
チキス針３で20ケ所／m2仮止めし、この型枠板を
用いてコンクリート型枠を組む。一方不織布を貼
らない型枠板によりコンクリート型枠を組み、
夫々の型枠内へ同質のコンクリート４を打設し、
壁体を作つた。ついで表面にセメント砂比１：３
（容積）のモルタル５を３cm厚に塗布し、１ケ月
放置したのち、建研式引張り接着力試験器にて接
着強度を測定した所、次表の結果を得た。
The purpose of this invention is to fiber-reinforce the surface layer of a concrete structure, increase the adhesion between the finishing material applied to the surface of the concrete structure and the structure, and prevent the finishing material from cracking, peeling, or falling off. The present invention relates to a method for surface treatment of concrete structures. In general, for concrete structures, after demolding the concrete formwork, mortar is applied to make it smooth, and then tiles are laid on top of it and sprayed material (hereinafter referred to as "final finishing material") is sprayed on. It is true. In this construction method, adhesive interfaces occur at two places: the concrete frame and the mortar layer, and the mortar layer and the final finishing material. Various methods have been developed to bond the mortar and the final finishing material. The interface is strongly bonded.
On the other hand, the adhesion between the concrete frame and the mortar layer is still insufficient, resulting in cracks in the surface finishing material,
There is a risk of peeling or peeling accidents. In particular, if the concrete body layer is not dense and the strength of the surface layer is low, cracks in the surface finish layer may occur due to stress generated due to movement of the surface finish material layer or stress generated due to rusting and expansion of reinforcing bars in the concrete body. , peeling and peeling easily occur. Currently, methods for adhering the structure and mortar layer include roughening the surface of the structure, applying synthetic resin emulsion, or sizing with an admixture, but these methods can cause cracks, peeling, or flaking of the surface finish layer. It is nearly impossible to prevent this, and further improvements are required. The above-mentioned conventional construction methods have little effect on preventing cracking, peeling, or flaking of the surface finish layer due to insufficient strength of the concrete surface layer. Furthermore, with conventional concrete pouring techniques, the strength of the surface of the resulting concrete structure is low, which is a very important issue today when considering the durability of concrete structures. However, in this invention, a three-dimensional mesh fiber sheet made of alkali-resistant and water-resistant fibers is temporarily fixed to the inner surface of the formwork board, and concrete is poured into the formwork constructed using this, so that the water in the concrete is reduced. The hard cement slurry penetrates into the three-dimensional mesh fiber sheet layer, and the three-dimensional mesh fiber sheet becomes one with the concrete, and the three-dimensional mesh fiber sheet buried in the concrete surface strengthens the concrete and is exposed to the concrete surface. The three-dimensional mesh fiber sheet becomes fluffy and becomes an anchor for the mortar layer, so there is no risk of the mortar layer cracking, peeling, or falling off after mortar construction, and it firmly bonds the surface finishing material such as mortar to the concrete frame. Thus, the above-mentioned conventional problems were solved. A feature of the present invention is that the surface layer of the concrete body is reinforced with fibers, and a surface finishing layer such as mortar is physically and mechanically bonded to the concrete body using the fibers as anchors. In other words, the reinforcement of the underlying concrete surface layer and the synergistic effect of the chemical bond and mechanical bond between the surface finishing layer and the concrete frame provide highly reliable adhesion, and the mortar layer does not expand or contract due to heat or moisture after construction. Even if shearing or tensile forces act at the interface between concrete and mortar, the anchoring effect of the fibers relieves the stress and extremely reduces peeling. Even if it were to peel off, the surface finish layer would not come off, and the concrete surface layer and the surface finish layer are also bonded by fibers. In order to increase the fiber reinforcement of the concrete surface, it is extremely effective to use a vibrator when pouring concrete. In particular, the use of formwork-installed vibrators makes it easier for concrete to penetrate into the three-dimensional mesh fiber sheet layer, and excess water in the concrete is discharged to the outside through the water absorption and water permeation effects of the three-dimensional mesh fiber sheet. As a result, the strength of concrete is greatly improved. Excess water in the concrete absorbed by the three-dimensional mesh fiber sheet is discharged from the joint part of the formwork,
Needless to say, by providing drainage holes in the formwork at appropriate intervals, excess water in the concrete can be drained more effectively. Another feature is that the material cost is low and construction is extremely simple and economical. In other words, it is only necessary to temporarily fix the three-dimensional mesh fiber sheet to the inner surface of the form board with staples or double-sided mucosal tape, and then pour concrete into the constructed concrete form. Since the fibrous sheet is temporarily fixed, it does not require much cost and labor compared to the conventional method. Furthermore, when applying mortar to the concrete surface after the concrete has hardened, water curing is performed as in conventional construction methods, or mortar is applied after diluted emulsion is applied. The alkali-resistant and water-resistant fibers used in this invention include acrylic fibers, polypropylene fibers, polyester fibers, nylon fibers, vinylon fibers, rayon fibers, aromatic polyamide fibers, carbon fibers, aromatic polyamide fibers, carbon fibers, glass fibers, Alkali-resistant and water-resistant fibers such as asbestos fibers and rock wool fibers used alone or in combination of two or more of the above to form non-woven fabrics, woven fabrics, knitted fabrics or monofilament entanglements as alkali-resistant and water-resistant fiber sheets. is used. Of these,
Nonwoven fabrics and monofilament entangled bodies are suitable because the fibers are intertwined and have three-dimensional openings. Nonwoven fabrics are used to reinforce concrete surfaces to a depth of about 1 to 55 mm. Manufacturing methods for nonwoven fabric include dipping method, needle punch method,
There are spunbond methods and stitch methods, both of which are suitable. Further, the three-dimensional mesh fiber sheet may be constructed by combining a woven fabric or a knitted fabric with a non-woven fabric, and in this case as well, good effects can be achieved. Monofilament entangled bodies are used when reinforcing concrete surfaces to a depth of approximately 5 to 40 mm. A synthetic resin monofilament entangled body having an apparent thickness of 5 to 40 mm, which is obtained by three-dimensionally entangling synthetic resin monofilaments having a diameter of 0.1 mm or more and having a three-dimensional crimp, and joining the entangled portions, is suitable. It is desirable that the monofilament entangled body has high rigidity. Monofilament diameter is 0.1
If it is less than mm, the monofilament entangled body will be compressed by the concrete placement pressure due to the low rigidity, making it difficult to fill the monofilament with concrete. Also, even if a vibrator is used, the filling of the concrete into the monofilament is not significantly improved due to poor vibration transmission.
Therefore, it is desirable to use an entangled body of synthetic resin monofilaments with a diameter of 0.1 mm or more. The monofilaments constituting the entangled body are not particularly specified as long fibers or short fibers, but in terms of the mechanical properties of the entangled body, the monofilament is preferably 25 mm or more and 250 mm or less, and monofilaments of different fiber lengths may be mixed and used. I don't mind. The monofilament with three-dimensional crimps that constitutes the entangled body can be produced using the false twist heating method, the rope heating method,
It is a monofilament that has been given a three-dimensional crimp by a latent crimping method, a rubbing method, etc., and it is particularly desirable to use methods such as a false twist heating method and a rope heating method. The entangled parts are joined together by applying an adhesive treatment to the entangled body by spraying or dipping, and then drying and heat-treating the adhesive to harden it. By using a monofilament partially made of a material with a low melting point, or by using a composite monofilament made of multiple materials with different melting points for part or all of the monofilament, and then heat-treating the monofilament after intertwining, the melting point can be lowered. There are methods such as melting the materials and joining the intertwined parts. Materials for the synthetic resin monofilament include synthetic resins such as polyamide, polyester, polyolefin, polyvinyl chloride, and polyvinylidene chloride, and these synthetic resins may be used alone or in combination. When attaching a three-dimensional mesh fiber sheet to a formwork board, it is necessary that the three-dimensional mesh fiber sheet does not fall off during concrete pouring, and that it can be easily peeled off from the formwork board when demolding. Temporarily fasten with architectural staples, and when using metal formwork, partially adhere with double-sided adhesive tape. As a three-dimensional mesh fiber sheet, one with a certain degree of stiffness is easy to construct. If blistering occurs when temporarily fixing to the formwork board, there is a risk of it falling off during concrete pouring, so temporarily fix it so that it blends well with the formwork board surface. Mortar construction is no different from traditional construction methods. In other words, it is necessary to prevent the mortar layer from drying out by curing the base with water or applying emulsion, and since mechanical bonding using fiber anchors alone has low strength, chemical bonding, which is inherent in mortar, should also be used to the maximum extent. I have to make it come out. The mortar should be mixed at a cement-sand ratio of 1:2 to 1:3 (by volume), and a rich or poor mix is not preferable. In addition, it is more preferable to rub the concrete surface with a wire brush or the like to make the surface more fluffy before construction. In the above, mortar has been described as a surface finishing material, but the same applies to the application of spray materials such as plaster, plaster, and thick paint in addition to mortar. Other advantages of the present invention include that the concrete formwork is resistant to staining with concrete slag, is extremely easy to clean, and that there is no need to apply a release agent to the concrete formwork. As for the type of formwork board, any of plywood formwork, metal formwork, and synthetic resin formwork is possible. This invention is not only suitable for on-site construction, but also
It can also be used in factory production of concrete products such as precast panels or precast units. That is, according to the present invention, a three-dimensional mesh fiber sheet is temporarily attached to the surface of a formwork plate, a concrete formwork is constructed using this, concrete is poured, and finishing material is applied to the exposed fiber surface after removing the mold. Since it is constructed, the building frame and finishing material are firmly bonded by mechanical, physical, and chemical forces, and it also has the effect of reinforcing the concrete surface and the finishing material layer. However, the construction labor, materials, time, etc. are not much different from the conventional method.
Cracking, peeling, and flaking of the finishing material can be prevented, and the durability of the concrete structure can be greatly improved. Next, a comparative experimental example of this invention will be explained. Experimental example A non-woven fabric 2 made of polypropylene fibers with a basis weight of 80 g/m 2 is temporarily fixed to the inner surface of a plywood form board 1 at 20 locations/m 2 using construction staples 3, and this form board is used to create a concrete mold. Assemble a frame. On the other hand, the concrete formwork is constructed using formwork boards that do not have non-woven fabric attached.
Concrete 4 of the same quality is poured into each formwork,
I made a wall. Then apply cement to sand ratio 1:3 on the surface.
(volume) of mortar 5 was applied to a thickness of 3 cm, and after being left for one month, the adhesive strength was measured using a Kenken type tensile adhesion tester, and the results shown in the following table were obtained.
【表】
実験例
実験例と同じ方法で作つた供試体に1kwの白
熱ランプを１ｍの距離よりあて、冷熱の繰返しを
10回行つたのち、建研式引張り接着力試験器で接
着強度を測定した所、次表の結果を得た。[Table] Experimental example A 1kw incandescent lamp was applied to a specimen made in the same manner as in the experimental example from a distance of 1m to repeatedly heat and cool the specimen.
After the test was repeated 10 times, the adhesive strength was measured using a Kenken-type tensile adhesive strength tester, and the results shown in the following table were obtained.
【表】
実験例
繊維径１mm前後のナイロン繊維よりなる2.5〜
５mmの空げきを有する10mm厚のモノフイラメント
絡合体（300ｇ／m2）を合板型枠板の内面に建築
用ホツチキス針で20ケ所／m2仮止めし、この型枠
板を用いてコンクリート型枠を組む。
一方、立体網目状繊維シートを貼らない型枠板
を用いて、コンクリート型枠を組む。夫々の型枠
内へ同質のコンクリーを打設し、壁体を作つた
（壁寸法１ｍ×２ｍ、150mm厚）コンクリートの打
設後14日経てから脱型し、更に14日間放置した後
に、エポキシ樹脂系接着剤を用いて鉄製のアタツ
チメント（５cm×10cm）を張付け、建研式引張接
着力試験器にてコンクリート表面部の引張強度を
測定した所、次表の結果を得た。[Table] Experimental example 2.5~ made of nylon fibers with a fiber diameter of around 1 mm
A 10 mm thick intertwined monofilament (300 g/m 2 ) with a 5 mm gap was temporarily fixed to the inner surface of the plywood form board at 20 locations/m 2 using construction staples, and the form board was used to create a concrete mold. Assemble a frame. On the other hand, a concrete formwork is constructed using formwork boards to which the three-dimensional mesh fiber sheet is not attached. Concrete of the same quality was poured into each formwork to create a wall (wall dimensions: 1m x 2m, 150mm thick).The mold was removed 14 days after the concrete was poured, and after being left for another 14 days, epoxy was applied. An iron attachment (5 cm x 10 cm) was attached using a resin adhesive, and the tensile strength of the concrete surface was measured using a Kenken tensile adhesion tester, and the results shown in the following table were obtained.
第１図はこの発明により表面処理したコンクリ
ート躯体の一部断面図、第２図は同じく一部拡大
図、第３図はこの発明の施工に用いる型枠板の一
部平面図である。
１……型枠板、２……不織布、４……コンクリ
ート、５……モルタル。
FIG. 1 is a partial sectional view of a concrete frame whose surface has been treated according to the present invention, FIG. 2 is a partially enlarged view of the same, and FIG. 3 is a partial plan view of a form board used in construction according to the present invention. 1... Form board, 2... Non-woven fabric, 4... Concrete, 5... Mortar.
Claims (1)
繊維シートを内面に仮止めした型枠板を用いてコ
ンクリート型枠を組み立て、前記コンクリート型
枠内にコンクリートを打設して前記立体網目状繊
維シートをコンクリート表面層に埋設するととも
に、立体網目状繊維シートの表面をコンクリート
から露出させ、脱型後、前記立体網目状繊維シー
トの露出部へ表面仕上げ材を施工することを特徴
としたコンクリート躯体の表面処理方法。 ２ 耐アルカリ、耐水性繊維を、アクリル繊維、
ポリプロピレン繊維、ポリエステル繊維、ナイロ
ン繊維、ビニロン繊維、レイヨン繊維、ガラス繊
維、石綿繊維又は岩綿繊維とした特許請求の範囲
第１項記載のコンクリート躯体の表面処理方法。 ３ 立体網目状繊維シートを、不織布、織布、編
布とした特許請求の範囲第１項記載のコンクリー
ト躯体の表面処理方法。 ４ 表面仕上げ材をセメントモルタル、プラスタ
ーまたは厚付塗料とした特許請求の範囲第１項記
載のコンクリート躯体の表面処理方法。[Scope of Claims] 1. A concrete form is assembled using a form board to which a three-dimensional mesh fiber sheet made of alkali-resistant and water-resistant fibers is temporarily fixed on the inner surface, and concrete is poured into the concrete form. The method includes embedding the three-dimensional mesh fiber sheet in a concrete surface layer, exposing the surface of the three-dimensional mesh fiber sheet from the concrete, and applying a surface finishing material to the exposed portion of the three-dimensional mesh fiber sheet after demolding. Characteristic surface treatment method for concrete structures. 2 Alkali-resistant and water-resistant fibers, acrylic fibers,
2. The method for surface treatment of a concrete building body according to claim 1, wherein polypropylene fibers, polyester fibers, nylon fibers, vinylon fibers, rayon fibers, glass fibers, asbestos fibers or rock wool fibers are used. 3. The method for surface treatment of a concrete frame according to claim 1, wherein the three-dimensional mesh fiber sheet is a nonwoven fabric, a woven fabric, or a knitted fabric. 4. The method for surface treatment of a concrete frame according to claim 1, wherein the surface finishing material is cement mortar, plaster, or thick paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20114481A JPS58101960A (en) | 1981-12-14 | 1981-12-14 | Surface treatment of concrete body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20114481A JPS58101960A (en) | 1981-12-14 | 1981-12-14 | Surface treatment of concrete body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58101960A JPS58101960A (en) | 1983-06-17 |
| JPS6253666B2 true JPS6253666B2 (en) | 1987-11-11 |
Family
ID=16436123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20114481A Granted JPS58101960A (en) | 1981-12-14 | 1981-12-14 | Surface treatment of concrete body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58101960A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02148220U (en) * | 1989-05-20 | 1990-12-17 | ||
| JPH0720414B2 (en) * | 1989-01-11 | 1995-03-08 | 政次 満松 | Punching machine for planting seedlings |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61130546A (en) * | 1984-11-28 | 1986-06-18 | 旭フアイバ−グラス株式会社 | Wall construction method of house and heat insulating sound-proof material |
| JP4546878B2 (en) * | 2004-11-17 | 2010-09-22 | 株式会社淺沼組 | Application method and structure of mortar for concrete wall |
| KR100970251B1 (en) | 2008-06-19 | 2010-07-16 | 주식회사 오피 | a self-adhesion type multilayer TPU sheet, a waterproof layer and waterproof method using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5219416A (en) * | 1975-08-04 | 1977-02-14 | Nippon Muki Zairiyou Kk | Strengthening method of surface portion of concrete building |
| JPS5549452A (en) * | 1978-10-04 | 1980-04-09 | Nippon Kobunshi Kagaku Kk | Method of making lining layer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49120025U (en) * | 1973-02-09 | 1974-10-15 |
-
1981
- 1981-12-14 JP JP20114481A patent/JPS58101960A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5219416A (en) * | 1975-08-04 | 1977-02-14 | Nippon Muki Zairiyou Kk | Strengthening method of surface portion of concrete building |
| JPS5549452A (en) * | 1978-10-04 | 1980-04-09 | Nippon Kobunshi Kagaku Kk | Method of making lining layer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0720414B2 (en) * | 1989-01-11 | 1995-03-08 | 政次 満松 | Punching machine for planting seedlings |
| JPH02148220U (en) * | 1989-05-20 | 1990-12-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58101960A (en) | 1983-06-17 |
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