JPH0231023B2 - - Google Patents
Info
- Publication number
- JPH0231023B2 JPH0231023B2 JP60173850A JP17385085A JPH0231023B2 JP H0231023 B2 JPH0231023 B2 JP H0231023B2 JP 60173850 A JP60173850 A JP 60173850A JP 17385085 A JP17385085 A JP 17385085A JP H0231023 B2 JPH0231023 B2 JP H0231023B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- grc
- emulsion
- cement
- added
- 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
- 239000000203 mixture Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000004568 cement Substances 0.000 claims description 29
- 239000000839 emulsion Substances 0.000 claims description 20
- 238000010276 construction Methods 0.000 claims description 19
- 239000003513 alkali Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 15
- 229920003002 synthetic resin Polymers 0.000 claims description 13
- 239000000057 synthetic resin Substances 0.000 claims description 13
- 229920003051 synthetic elastomer Polymers 0.000 claims description 12
- 239000005061 synthetic rubber Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 9
- 239000004570 mortar (masonry) Substances 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 9
- 230000002378 acidificating effect Effects 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000002156 mixing Methods 0.000 description 8
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 description 7
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000004816 latex Substances 0.000 description 3
- 229920000126 latex Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 101001061807 Homo sapiens Rab-like protein 6 Proteins 0.000 description 1
- 102100029618 Rab-like protein 6 Human genes 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
Description
（産業上の利用分野）
本発明は、GRC（Glass−fiber Reinforced
Cement−ガラス繊維補強セメント）用の新規な
既調合組成物とこの組成物を利用したGRC施工
法に関する。
（従来の技術）
近時、耐アルカリガラス繊維を切断したガラス
チツプをセメント及び砂等の骨材に添加混合した
GRCが高層ビル等の建築構造物に用いられるよ
うになつたことは周知の通りである。GRCは混
合されたガラス繊維の補強効果により通常のセメ
ント構造体の数倍の曲げ強度或いは引張り強度を
保有するものであるが、元来ガラスは耐アルカリ
性に乏しく、一方セメントはアルカリ性であるた
め、構造物中でガラス繊維が侵食され当初の優れ
た強度が持続されないと云う欠点があつた。しか
し、ジルコニアガラスで代表される耐アルカリガ
ラス繊維が開発されるに及んでGRCの用途が上
記の如き建築構造物にも拡大されることとなつ
た。
（発明が解決しようとする問題点）
然し乍ら、耐アルカリガラス繊維と云えども完
全ではなく、例えば上記GRCによる構造物で曲
げ強度が５年間で50％低下し、また屋外暴露や水
中浸漬した場合曲げ強度或いは引張り強度が１年
間で30〜70％低下したと云つた報告もなされてい
る。GRC用ガラス繊維は一本一本の短繊維を酢
酸ビニルラテツクスやアクリルラテツクスで被覆
し集束したものが多いが、硬化被膜との相互作用
により混和時や施工時にガラス繊維が折れ易く必
ずしも万全とは云えなかつた。そこで３〜５デニ
ールの繊維を200本前後集束し、之を部分的に合
成樹脂エマルジヨンで接着したものが一般に用い
られているが斯かる集束繊維では上述の如き性能
上の問題点がなお残存していた。最近になつて耐
アルカリガラス繊維の上記不完全さを補う為に、
ガラス繊維をエポキシ樹脂やその他の樹脂でコー
テイングし集束させアルカリアタツクを防ぐよう
にした方法が提案されているが、この方法は調製
に手間が掛かりコスト高となると共に、集束繊維
がセメントスラリー中で１本の棒のようになり、
分散が悪くなり且つセメントとの馴染みが悪くな
りGRCとしての物性が寧ろ発揮されないと云う
問題点があつた。
又、近年現場施工用のGRCコンパウンドとの
主旨で、セメント、、硅砂、耐アルカリガラス繊
維（１〜２％混入）の空練りコンパウンドを販売
したり、此れにスチレンブタジエンラバーやエチ
レン酢ビのエマルジヨン等を添加して現場で混合
する方法も採用されるようになつたが、施工時に
水を添加する為、微妙な水比を確実に維持して配
合することは困難であつた。
本発明は、上記問題点を解消すべくなされたも
のであり、GRCの現場施工が極めて簡易になし
得且つ水比の調整が常に正確になし得ると共に得
られたGRC構造物が当初の強度を長く持続し得
る新規なGRC用既調合組成物と該組成物を利用
したGRC施工法を提供せんとするものである。
（問題点を解決する為の手段）
上記目的を達成する為の本発明の構成を述べる
に、本発明の第１の要旨は、酸性乃至微アルカリ
性の非水溶性合成樹脂若しくは合成ゴムの溶液若
しくは乳化液と、該乳化液に浸漬された耐アルカ
リガラスの集束繊維と、後添加された水と、同じ
く後添加されたモルタル減水剤及び／若しくは界
面活性剤とより成るGRC用組成物であり、第２
の要旨は、このGRC用組成物を秤量混合された
セメント及び骨材に現場にて添加混練し、該混練
物を被施工部位に施与するようにしたGRC施工
法にある。尚、上記既調合組成物に於いて、非水
溶性合成樹脂若しくは合成ゴムの乳化液に上記集
束繊維を浸漬させた後に、水、モルタル減水剤及
び／若しくは界面活性剤を添加することを必須と
するが、その理由は、水等を添加した後集束繊維
を添加すると上記合成樹脂や合成ゴムが繊維表面
に充分に付着しないからである。
本発明組成物に使用される集束繊維と構成する
耐アルカリガラス繊維としてはジルコニアガラス
繊維が最も望ましいがその他の耐アルカリガラス
繊維もも採用可能である。また、この集束繊維を
浸漬する乳化液としては、EVA（エチレン酢酸ビ
ニル）、SBR（ブタジエン・スチレンゴム）、アク
リルラテツクス等の酸性乃至微アルカリ性の合成
樹脂若しくは合成ゴムの乳化液が採用される。本
発明の組成物は上記ガラス繊維による集束繊維及
びこれら乳化液、水を主成分とするが、これには
更に現場にて混練されるセメント及び骨材の規定
量に対し適正な配合割合となるようモルタル減水
剤及び界面活性剤の少なくとも１種が含まれる。
特に本発明の組成物はこれら構成材料を一括し容
器に充填されて調整され、一定量毎に袋詰めされ
たセメントと現場にて混練されるものである為、
水比などの施工の作業性や性能に大きく影響を及
ぼす因子を適正化し得るよう事前に組成物中でそ
の配合割合を定めておくことが出来る。
（作用）
上記組成物を用いGRC施工するには、事前に
調製された組成物を規定量のセメント及び骨材に
混練する。この時、組成物を充填した容器中では
ガラス繊維が沈降しているのでその上澄み液のみ
を先ずセメント及び骨材に添加して良く混練し、
爾後沈降しているガラス繊維を加え軽く混和する
ようにすれば、ガラス繊維の集束状態が維持され
ると共にガラス繊維の折断が少なく補強繊維とし
ての特性が遺憾なく発揮される。加えられたガラ
ス繊維は上記合成樹脂或いは合成ゴムの乳化液に
湿潤されているから、直接セメントに接すること
が少なく、その侭被施工部位に施与され養生硬化
されると、集束繊維を構成する各ガラス繊維は硬
化した酸性乃至微アルカリ性の合成樹脂や合成ゴ
ムによつてコーテイングされた状態でバラけるこ
となく構造物中に存在することになり、セメント
からのアルカリアタツクを受けずその本来の補強
機能を長く持続する。またガラス繊維は上記の如
く湿潤状態で混練されるからセメントとの馴染み
が良く、軽い混和でも集束状態を維持したまま充
分に分散させることが出来、現場調合で簡易に
GRC施工を行うことが可能となる。因みに従来
のGRC施工はガラスを切断しつつセメントペー
ストと同時吹付けするか、特種なガンにて吹付す
る方法が採用されていたが、これらの方法は熟練
と技量を要するものであつた。特にこの既調合組
成物の構成材の配合割合を前述の如くセメントや
骨材の規定量に対し適正化させておけば、現場で
はセメント、骨材及びこの組成物を適宜混練し必
要とあらばこれに微調整用の水を加えるだけで最
適なペースト状態のGRCコンパウンドが極めて
簡易に得られ、これによりGRC施工の作業性が
飛躍的に向上するのである。これを更に詳述すれ
ば、既調合組成物中に規定量の水が含まれている
から、現場では微調整用の水を若干加えるだけで
適正な水比の調整がなし得、これにより施工後の
収縮が抑制され、強度が仕上り面が均一となり
（ガラス繊維の浮きや倒立が少なくなる）、更には
色むらやクラツクの発生が防止される、…など
GRC施工にとつて重要な要件が簡易に充足され
るのである。
（実施例）
以下に実施例を採つて本発明を更に詳述する。
(i) GRC用既調合組成物の調製；
EVA樹脂エマルジヨン（EVA樹脂に換算して
11重量部）に、耐アルカリガラスの集束繊維〔セ
ントラルガラス(株)製、商品名；パルフアイバー〕
６重量部を加えて浸漬し、その後水35重量部、モ
ルタル減水剤（ポリカルボン酸塩、ナフタレンス
ルホン酸縮合物）及び界面活性剤（アニオン又は
ノニオン界面活性剤）を若干量加えて良く混合し
た。
(ii) GRC構造物のテストピース作成；
セメント100重量部及び５号硅砂100重量部を混
合し、これに２週間以上静置させた上記組成物の
上澄み液を加え、良く混練してペースト状とな
し、更に容器の底部に沈降したガラス繊維を全て
加え混和した。この混和物を２cmの厚さに縦横に
塗りつけこれを５回繰り返して仕上げ、７日養生
後幅４cm、長さ16cmに切断しテストピースとし
た。
（比較例）セメント100重量部、５号硅砂100重
量部、水40重量部、上記同様のガラス繊維の集束
繊維６重量部及び上記同様のモルタル減水剤・界
面活性剤を若干量加えて良く混練し、上記と同様
に塗りつけ比較用テストピースを調製した。
上記（実施例）と（比較例）とのGRCペース
ト状態での組成を第１表に示す。
(Industrial Application Field) The present invention is based on GRC (Glass-fiber Reinforced
This article relates to a new pre-mixed composition for cement (glass fiber reinforced cement) and a GRC construction method using this composition. (Prior technology) Recently, glass chips made by cutting alkali-resistant glass fibers have been added and mixed into aggregates such as cement and sand.
It is well known that GRC has come to be used in architectural structures such as high-rise buildings. GRC has bending strength and tensile strength several times that of ordinary cement structures due to the reinforcing effect of mixed glass fibers, but since glass originally has poor alkali resistance, and cement is alkaline, The disadvantage was that the glass fibers in the structure were eroded and the initial excellent strength was not maintained. However, with the development of alkali-resistant glass fibers such as zirconia glass, the use of GRC has been expanded to include the above-mentioned architectural structures. (Problems to be Solved by the Invention) However, even though it is made of alkali-resistant glass fiber, it is not perfect; for example, the bending strength of the above-mentioned GRC structure decreases by 50% in 5 years, and the bending strength decreases when exposed outdoors or immersed in water. It has also been reported that the strength or tensile strength decreased by 30 to 70% in one year. Glass fibers for GRC are often made by covering individual short fibers with vinyl acetate latex or acrylic latex, but the glass fibers tend to break during mixing or installation due to interaction with the hardened coating, so it is not always possible to ensure the best results. I couldn't say that. Therefore, it is generally used to bundle around 200 fibers of 3 to 5 deniers and partially adhere them with synthetic resin emulsion, but such bundled fibers still have the performance problems described above. was. Recently, in order to compensate for the above-mentioned imperfections of alkali-resistant glass fiber,
A method has been proposed in which glass fibers are coated with epoxy resin or other resins to bundle them and prevent alkali attack. It becomes like a stick,
There were problems in that the dispersion was poor and the compatibility with cement was poor, so the physical properties as GRC were not exhibited. In addition, in recent years, with the aim of producing GRC compounds for on-site construction, we have been selling air-mixed compounds containing cement, silica sand, and alkali-resistant glass fiber (1 to 2% mixed), and we have also started selling air-mixed compounds containing styrene-butadiene rubber and ethylene-vinyl acetate. A method of adding emulsion and mixing on site has also come to be adopted, but since water is added at the time of construction, it has been difficult to reliably maintain and mix the delicate water ratio. The present invention has been made in order to solve the above problems, and allows GRC to be constructed extremely easily on site, the water ratio can be adjusted accurately at all times, and the resulting GRC structure retains its original strength. The purpose of the present invention is to provide a new GRC ready-mixed composition that can last for a long time and a GRC construction method using the composition. (Means for Solving the Problems) To describe the structure of the present invention to achieve the above object, the first gist of the present invention is to use a solution or a solution of an acidic or slightly alkaline water-insoluble synthetic resin or synthetic rubber. A GRC composition comprising an emulsion, alkali-resistant glass bundled fibers immersed in the emulsion, post-added water, and a post-added mortar water reducer and/or surfactant, Second
The gist is a GRC construction method in which this GRC composition is added and kneaded to weighed and mixed cement and aggregate on site, and the kneaded product is applied to the construction site. In addition, in the above-mentioned ready-mixed composition, it is essential to add water, a mortar water reducing agent and/or a surfactant after immersing the above-mentioned bundled fibers in an emulsion of a water-insoluble synthetic resin or synthetic rubber. However, the reason for this is that if the bundled fibers are added after adding water or the like, the synthetic resin or synthetic rubber will not adhere sufficiently to the fiber surface. Zirconia glass fibers are most desirable as the alkali-resistant glass fibers constituting the bundled fibers used in the composition of the present invention, but other alkali-resistant glass fibers may also be used. In addition, as the emulsion for dipping the bundled fibers, an emulsion of acidic or slightly alkaline synthetic resin or synthetic rubber such as EVA (ethylene vinyl acetate), SBR (butadiene styrene rubber), or acrylic latex is used. . The composition of the present invention has the above-mentioned glass fiber bundles, an emulsion thereof, and water as the main components, but this is further added in an appropriate proportion to the specified amount of cement and aggregate to be mixed on-site. At least one of a mortar water reducing agent and a surfactant is included.
In particular, since the composition of the present invention is prepared by packing these constituent materials into a container and mixing them on-site with cement packed in bags in fixed amounts,
The blending ratio in the composition can be determined in advance so that factors such as the water ratio that greatly affect the workability and performance of construction can be optimized. (Operation) To perform GRC construction using the above composition, the composition prepared in advance is kneaded with specified amounts of cement and aggregate. At this time, since the glass fibers have settled in the container filled with the composition, only the supernatant liquid is first added to the cement and aggregate and kneaded well.
If the precipitated glass fibers are then added and mixed lightly, the bundled state of the glass fibers is maintained and the glass fibers are less likely to break, allowing the properties of the reinforcing fibers to be fully demonstrated. Since the added glass fibers are moistened with the emulsion of the synthetic resin or synthetic rubber, they rarely come into direct contact with cement, and when applied to the site where they are to be applied and cured, they form bundled fibers. Each glass fiber is coated with hardened acidic or slightly alkaline synthetic resin or synthetic rubber and exists in the structure without falling apart, so that it is not exposed to alkali attack from cement and retains its original strength. Maintains reinforcing function for a long time. In addition, since glass fibers are kneaded in a wet state as mentioned above, they blend well with cement, and even with light mixing, they can be sufficiently dispersed while maintaining a concentrated state, making it easy to mix on-site.
It becomes possible to carry out GRC construction. Incidentally, conventional GRC construction involves cutting the glass and spraying it with cement paste at the same time, or spraying it with a special gun, but these methods require skill and skill. In particular, if the mixing ratio of the components of this ready-mixed composition is adjusted to the specified amount of cement and aggregate as described above, the cement, aggregate, and this composition can be appropriately kneaded at the site and used as needed. By simply adding water for fine adjustment, a GRC compound in an optimal paste state can be obtained extremely easily, which dramatically improves the workability of GRC construction. To explain this in more detail, since the pre-mixed composition contains a specified amount of water, the appropriate water ratio can be adjusted at the site by simply adding a small amount of water for fine adjustment. Later shrinkage is suppressed, the strength and finished surface are uniform (reduced floating and inverted glass fibers), and color unevenness and cracks are prevented, etc.
Important requirements for GRC construction can be easily met. (Example) The present invention will be explained in further detail by referring to Examples below. (i) Preparation of ready-mixed composition for GRC; EVA resin emulsion (in terms of EVA resin)
11 parts by weight), alkali-resistant glass bundled fibers [manufactured by Central Glass Co., Ltd., trade name: Parf Iver]
After that, 35 parts by weight of water, a mortar water reducer (polycarboxylic acid salt, naphthalene sulfonic acid condensate) and a small amount of surfactant (anionic or nonionic surfactant) were added and mixed well. . (ii) Creating a test piece for a GRC structure: Mix 100 parts by weight of cement and 100 parts by weight of No. 5 silica sand, add the supernatant liquid of the above composition that has been left to stand for more than two weeks, and mix well to form a paste. Then, all the glass fibers that had settled at the bottom of the container were added and mixed. This mixture was applied vertically and horizontally to a thickness of 2 cm, and this was repeated 5 times to finish. After curing for 7 days, the test piece was cut into pieces of 4 cm wide and 16 cm long. (Comparative example) Add 100 parts by weight of cement, 100 parts by weight of No. 5 silica sand, 40 parts by weight of water, 6 parts by weight of the same glass fiber bundles, and a small amount of the same mortar water reducer/surfactant as above and mix well. A comparison test piece was prepared in the same manner as above. The compositions of the above (Example) and (Comparative Example) in the GRC paste state are shown in Table 1.
【表】
但し、第１表中の数値は重量部である。
これらGRCペーストに調製した後60分放置し、
ガラス繊維のみを取り出しセメント分を除去して
水に浸漬し、浸漬水のPHを測定したところ、
（実施例）では4.5〜5.0、一方（比較例）の場合
10〜10.5と実測された。このことより（実施例）
の場合、セメント中のアルカリ成分からのアタツ
クを受け難いことが理解される。
上記（実施例）と（比較例）とについて曲げ強
度の促進試験を行つたのでその結果を第２表に示
す。[Table] However, the values in Table 1 are parts by weight.
After preparing these GRC pastes, leave them for 60 minutes,
When we took only the glass fibers, removed the cement, and immersed them in water, we measured the PH of the immersed water.
(Example): 4.5 to 5.0, while (Comparative Example):
It was actually measured to be 10-10.5. From this (example)
It is understood that in this case, it is difficult to be attacked by alkaline components in cement. An accelerated bending strength test was conducted on the above (Example) and (Comparative Example), and the results are shown in Table 2.
【表】【table】
【表】
第２表の結果から明らかな如く、（実施例）の
サンプルは（比較例）のサンプルよりも屋外暴露
及び水中浸漬後の曲げ強度の酸存率が大である。
特に水中浸漬テストの結果においてその差が顕著
である。また、煮沸テストの如く過酷な条件でも
（実施例）は（比較例）を遥かに凌いでいる。こ
のことより、ガラス繊維をEVA樹脂のエマルジ
ヨンに湿潤状態にしてセメント及び骨材と混練し
GRC施工すると、ガラス繊維はセメントのアル
カリアタツクを受け難たく本来の補強機能を遺憾
なく発揮することが理解される。
尚、ガラス繊維を湿潤させる乳化液として
EVAエマルジヨン以外の前記合成樹脂若しくは
合成ゴムを採用した場合でも同様の結果を得た。
（発明の効果）
叙上の如く、本発明のGRC用既調合組成物は、
耐アルカリガラスの集束繊維が酸性乃至微アルカ
リ性の合成樹脂若しくは合成ゴムの乳化液中に浸
漬され、且つこれに後添加の水を含み、更にモル
タル減水剤及び界面活性剤の少なくとも１種を含
んで成るものであり、該組成物を現場にてセメン
ト及び骨材と混練すれば簡易にGRCペーストが
得られ、これをそのまま被施工部位に施与すれば
GRC施工が極めて速やかになされる。特に、該
組成物中の各構成材料をセメント及び骨材の規定
量に対し適正な配合となるよう予めその組成割合
を設定しておけば、現場では微調整用の水を添加
するだけでペーストの調合が可能となりその作業
性が一層向上すると共に、GRCとして要求され
る前記性能が確実に保証される。又、耐アルカリ
ガラス繊維の集束体は上記乳化液に湿潤状態でセ
メント等と混練されるから、集束繊維を構成する
各ガラス繊維表面に付着した合成樹脂若しくは合
成ゴムの付着力により集束体がバラけることな
く、また混練中に折断することも少なく、しかも
養生硬化後は各ガラス繊維が上記酸性乃至微アル
カリ性の樹脂等で被覆された状態で構造物中に散
在することになるから、セメントのアルカリアタ
ツクを受けることがなく本来の補強機能が長く持
続される。
このような本発明は、GRCの施工作業性及び
得られる構造物の性能において特筆されるべき利
点をもたらすものであり、その価値は極めて大で
ある。[Table] As is clear from the results in Table 2, the sample of (Example) has a higher acid retention rate of bending strength after outdoor exposure and immersion in water than the sample of (Comparative Example).
The difference is particularly noticeable in the results of the underwater immersion test. Moreover, even under severe conditions such as a boiling test, the results of the Examples are far superior to the Comparative Examples. For this reason, glass fibers are wetted in an emulsion of EVA resin and mixed with cement and aggregate.
It is understood that when GRC is applied, glass fibers are resistant to alkali attack from cement and fully demonstrate their original reinforcing function. In addition, as an emulsion to moisten glass fibers.
Similar results were obtained even when the synthetic resin or synthetic rubber other than EVA emulsion was used. (Effect of the invention) As mentioned above, the ready-mixed composition for GRC of the present invention has the following effects:
The bundled fibers of alkali-resistant glass are immersed in an emulsion of acidic or slightly alkaline synthetic resin or synthetic rubber, and this contains post-added water and further contains at least one of a mortar water reducing agent and a surfactant. GRC paste can be easily obtained by mixing the composition with cement and aggregate on site, and if this paste is directly applied to the work site,
GRC construction is done very quickly. In particular, if the composition ratio of each constituent material in the composition is set in advance so as to be an appropriate mixture for the specified amount of cement and aggregate, then the paste can be made by simply adding water for fine adjustment at the site. This makes it possible to prepare the following ingredients, further improving workability and ensuring the performance required for GRC. In addition, since the bundle of alkali-resistant glass fibers is kneaded with cement, etc. while wet in the emulsion, the bundle will break apart due to the adhesive force of the synthetic resin or synthetic rubber attached to the surface of each glass fiber that makes up the bundle. The glass fibers are less likely to break during mixing, and after curing and hardening, each glass fiber is covered with the above-mentioned acidic or slightly alkaline resin, etc., and is scattered throughout the structure. The original reinforcing function is maintained for a long time without being subjected to alkali attack. The present invention provides notable advantages in the workability of GRC construction and the performance of the resulting structure, and is extremely valuable.
Claims (1)
しくは合成ゴムの乳化液と、該乳化液に浸漬され
た耐アルカリガラスの集束繊維と、後添加された
水と、同じく後添加されたモルタル減水剤及び／
若しくは界面活性剤とより成るGRC用既調合組
成物。 ２ 酸性乃至微アルカリ性の非水溶性合成樹脂若
しくは合成ゴムの乳化液と、該乳化液に浸漬され
た耐アルカリガラスの集束繊維と、後添加された
水と、同じく後添加されたモルタル減水剤及び／
若しくは界面活性剤とより成るGRC用既調合組
成物を、秤量混合されたセメント及び骨材に現場
にて添加混練し、該混練物を被施工部位に施与す
るようにしたGRC施工法。 ３ 上記既調合組成物が、セメント及び骨材の規
定量に対し所望の配合となるよう、上記合成樹脂
若しくは合成ゴムの乳化液に対し上記集束繊維、
水、モルタル減水剤及び／若しくは界面活性剤を
定量配合したものである特許請求の範囲第１項記
載の施工法。 ４ 施工現場では微調整用の水以外の混和剤を用
いない特許請求の範囲第２項又は第３項記載の施
工法。[Scope of Claims] 1. An emulsion of acidic or slightly alkaline water-insoluble synthetic resin or synthetic rubber, bundled fibers of alkali-resistant glass immersed in the emulsion, post-added water, and post-added water as well. mortar water reducer and/or
Or a ready-mixed composition for GRC consisting of a surfactant. 2. An emulsion of acidic or slightly alkaline water-insoluble synthetic resin or synthetic rubber, alkali-resistant glass bundled fibers immersed in the emulsion, post-added water, a mortar water-reducing agent also post-added, and /
Alternatively, a GRC construction method in which a pre-prepared composition for GRC comprising a surfactant is added and kneaded to weighed and mixed cement and aggregate on site, and the kneaded product is applied to the construction site. 3. Add the focused fibers to the emulsion of the synthetic resin or synthetic rubber so that the pre-mixed composition has the desired composition with respect to the specified amounts of cement and aggregate.
The construction method according to claim 1, wherein a fixed amount of water, a mortar water reducing agent and/or a surfactant is blended. 4. The construction method according to claim 2 or 3, in which no admixture other than water for fine adjustment is used at the construction site.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17385085A JPS6236053A (en) | 1985-08-07 | 1985-08-07 | Preblended composition for grc and grc construction method therewith |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17385085A JPS6236053A (en) | 1985-08-07 | 1985-08-07 | Preblended composition for grc and grc construction method therewith |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6236053A JPS6236053A (en) | 1987-02-17 |
| JPH0231023B2 true JPH0231023B2 (en) | 1990-07-11 |
Family
ID=15968311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17385085A Granted JPS6236053A (en) | 1985-08-07 | 1985-08-07 | Preblended composition for grc and grc construction method therewith |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6236053A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243816A (en) * | 1975-10-06 | 1977-04-06 | Kubota Ltd | Production method of glass fiber reinforced board for building |
-
1985
- 1985-08-07 JP JP17385085A patent/JPS6236053A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5243816A (en) * | 1975-10-06 | 1977-04-06 | Kubota Ltd | Production method of glass fiber reinforced board for building |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6236053A (en) | 1987-02-17 |
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