JPH02102154A - Admixture for fiber-reinforced concrete - Google Patents
Admixture for fiber-reinforced concreteInfo
- Publication number
- JPH02102154A JPH02102154A JP25561788A JP25561788A JPH02102154A JP H02102154 A JPH02102154 A JP H02102154A JP 25561788 A JP25561788 A JP 25561788A JP 25561788 A JP25561788 A JP 25561788A JP H02102154 A JPH02102154 A JP H02102154A
- Authority
- JP
- Japan
- Prior art keywords
- admixture
- fiber
- cement
- viscosity
- reinforced concrete
- 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.)
- Granted
Links
- 239000011210 fiber-reinforced concrete Substances 0.000 title claims abstract description 19
- 239000007864 aqueous solution Substances 0.000 claims abstract description 6
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims abstract 5
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract 5
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract 5
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 claims abstract 3
- 238000006467 substitution reaction Methods 0.000 claims abstract 3
- 239000004480 active ingredient Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 25
- 238000001125 extrusion Methods 0.000 abstract description 18
- 239000000835 fiber Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 17
- 239000011159 matrix material Substances 0.000 description 10
- 239000012783 reinforcing fiber Substances 0.000 description 10
- -1 polypropylene Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000001879 gelation Methods 0.000 description 6
- 239000010425 asbestos Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229910052895 riebeckite Inorganic materials 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000012784 inorganic fiber Substances 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 239000004373 Pullulan Substances 0.000 description 1
- 229920001218 Pullulan Polymers 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 210000000436 anus Anatomy 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、繊維補強コンクリート（以下ＦＲＣと記す）
を製造する際、補強繊維をセメント系マトリックス中に
均一分散させるとともに、未硬化ＦＲＣの諸物件と加工
性を改善して、硬化物の製造を容易にし、品質向上をも
たらすＦＲＣコンクリート用混和剤、該混和剤により、
繊維補強コンクリートの加工性と品質を改善する方法、
ＦＲＣの加工性を改善するために該混和剤を配合された
セメント系マトリックスおよび該混和剤を配合して加工
され、品質を改善されたｌ’Ｒｃ未硬化物とＩ’ｌｌＣ
硬化物に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to fiber reinforced concrete (hereinafter referred to as FRC).
An admixture for FRC concrete that uniformly disperses reinforcing fibers in the cementitious matrix and improves the properties and processability of uncured FRC, facilitating the production of cured products and improving quality. With the admixture,
How to improve the workability and quality of fiber reinforced concrete,
A cementitious matrix blended with the admixture to improve the processability of FRC, and l'Rc uncured products and I'llC processed with the admixture to improve quality.
Regarding cured products.
セメント系硬化物に繊維状物質を配合することによって
、強度が向上することは、従来より知られており、アス
ベストを使用したアスベストコンクリートが、その典型
的な例である。さらに、近年、アスベストの発ガン性を
さけるためのアスベスト代替繊維での補強コンクリート
の検討や、高強度コンクリートの研究から、各種補強繊
維、例えば、無機系繊維としての炭素繊維・ガラス繊維
・スチールファイバー、有機系繊維としてのアラミド繊
維・ポリプロピレン繊維・ポリエチレン繊維・バルブな
どを使用した繊維補強コンクリートの実用化が行なわれ
ている。これらのＦＲＣは流し込み成形法、あるいは、
押出成形法によって製造されているが、量産化に適し、
しかも、低水比のためにより高強度のコンクリートが得
られる押出成形法によって、主に製造されている。It has been known for a long time that strength can be improved by adding a fibrous substance to a cement-based hardened product, and asbestos concrete using asbestos is a typical example. Furthermore, in recent years, studies have been conducted on reinforced concrete using asbestos alternative fibers to avoid the carcinogenicity of asbestos, and research on high-strength concrete has led to the use of various reinforcing fibers, such as carbon fiber, glass fiber, and steel fiber as inorganic fibers. , fiber-reinforced concrete using organic fibers such as aramid fibers, polypropylene fibers, polyethylene fibers, and valves has been put into practical use. These FRCs are made by casting method or
Manufactured using extrusion molding method, suitable for mass production.
Moreover, it is mainly produced by extrusion, which yields higher strength concrete due to the lower water ratio.
一般にＰＲＣはセメント系７トリツクスに対して、補強
繊維を０．１〜３０ｆｆｉ螢％含むもので、補強繊維の
配合による補強効果を発揮さ・きるために、補強繊維を
セメント系マトリックス中に均一分散することが重要で
ある。ところが、補強繊維は、一般に細いために、繊維
結束状物や、ファイバーボールと言われる毛玉状物が、
セメント系マトリックス中に発生しやすく、補強効果が
十分に発揮されない。In general, PRC contains 0.1 to 30ffi% of reinforcing fibers to the cement-based 7 Tricks, and in order to achieve the reinforcing effect by blending the reinforcing fibers, the reinforcing fibers are uniformly dispersed in the cement-based matrix. It is important to. However, reinforcing fibers are generally thin, so fiber bundles and pill-like materials called fiber balls can occur.
It tends to occur in cementitious matrices, and the reinforcing effect is not sufficiently exerted.
そこで、特開昭６０−２２６４４０号公報、特公昭６０
１３８１０号公報および特開昭５７−１６０９７９号公
報に開示されているように、一般に補強繊維分散剤とし
てメチル−セルロース（以下、ｎＣと記す）が、使用さ
れてきた。さらに、このＭＣの使用により、低水比で行
なう押出成形において、セメント系マトリックスに可塑
性を付与し、押出潤滑性をも付与し、押出成形を容易に
している。また、流し込み成形では、ペースト状のセメ
ント系マトリックスに粘性を与えることによって、ブリ
ージングの防止、ポンプ移送を可能にする流動性の付与
の効果もある。このＭＣの使用量は、一般に、流し込み
成形注出は、０．１〜２．０重量％（対セメント）であ
り、押出成形法では、１〜３ｍｆｆ１％（対セメント）
である、しかし、ＭＣを使用した場合、流し込み成形法
では、繊維の分散が均一になるものの、コンクリートの
のびが不十分なため、型枠に流し込んだ後に、欠ｍ部が
生じる。さらに、表面平滑仕上げの際にコテばなれが悪
く、平滑仕上げに熟練を要する欠点がある。また、押出
成形法では、ＭＣの水溶液が、高温（５０〜７０°Ｃ）
で、凝集・ゲル化する性質を持っているために、夏季あ
るいは、混合、混錬、押出の工程を経るにつれて、ＦＲ
Ｃ未硬化物の材温が上昇し、可塑性が低下し、押出圧力
の上昇や押出速度の低下となる。さらに材温か上がると
ＦＲＣ未硬化物のゲル化が生じ、押出装置内での閉塞が
起こり、製造の停止に至る。ゲル化したｐＨＣ未硬化物
を冷却により、ゲル化から回復させるには多くの時間を
要し、その間にセメントの硬化が進むために再使用はで
きず原材料のｔ置火になる。Therefore, Japanese Patent Application Publication No. 60-226440,
Methyl cellulose (hereinafter referred to as nC) has generally been used as a reinforcing fiber dispersant, as disclosed in Japanese Patent Application Laid-open No. 13810 and Japanese Patent Application Laid-open No. 160979/1983. Furthermore, the use of this MC imparts plasticity to the cementitious matrix and extrusion lubricity in extrusion molding performed at a low water ratio, making extrusion molding easier. In addition, by imparting viscosity to the paste-like cementitious matrix, casting has the effect of preventing breathing and imparting fluidity that enables pumping. The amount of MC used is generally 0.1 to 2.0% by weight (based on cement) for pouring, and 1 to 3% by weight (based on cement) for extrusion molding.
However, when using MC, although the fibers are dispersed uniformly in the pour molding method, the concrete does not spread sufficiently, resulting in missing parts after being poured into the formwork. Furthermore, there is a drawback that the trowel is difficult to release when smoothing the surface, and requires skill to finish the smoothing. In addition, in the extrusion molding method, the aqueous solution of MC is heated to a high temperature (50 to 70°C).
FR has the property of agglomerating and gelling, so during the summer or during the mixing, kneading, and extrusion processes, FR
C The temperature of the uncured material increases, the plasticity decreases, and the extrusion pressure increases and the extrusion speed decreases. When the material temperature further rises, gelation of the uncured FRC occurs, causing clogging in the extrusion device, leading to the stoppage of production. It takes a lot of time to recover the uncured gelled pHC material from gelation by cooling it, and during that time the cement hardens, so it cannot be reused and the raw material is left on fire.
これを防ぐために、押出機を強制的に、水、氷あるいは
ドライアイスで冷却したり、または通常の１〜３重量％
（対セメント）のＭＣ使用量を３〜６重■％（対セメン
ト）に増すなどの対策をとっている。しかし、このよう
な方法では、生産性や作業性が低下するだけでなく、作
業に熟練を必要とする。さらに、セメント、骨材に比べ
てより高価なＭＣの使用量の増加は、製品コストの上昇
となり極めて好ましくない。To prevent this, the extruder must be forcibly cooled with water, ice, or dry ice, or the normal 1 to 3% by weight
Measures are being taken such as increasing the amount of MC used (relative to cement) to 3 to 6% (relative to cement). However, such a method not only reduces productivity and workability, but also requires skill. Furthermore, an increase in the amount of MC, which is more expensive than cement and aggregate, increases product cost, which is extremely undesirable.
そこで、ＭＣのゲル化性を改みする方法として、？ＩＣ
にプロピレンオキサイドを付加してヒドロキシプロピル
メチルセルロース（以下、ＩＩＰＭＣと記す）あるいは
ＭＣにエチレンオキサイドを付加してヒドロキシエチル
メチルセルロース（以下、Ｉｌｌ！ＭＣと記す）として
、ゲル化温度を高くしたもの（［＋ｎｃｙｃｌｏｐｅｄ
ｉａ ｏｆ Ｐｏ１ｙｓｅｒ ５ｃｉｅｎｃｅ ａｎｄ
Ｅｎｇｉｎｅｅｒｉｎｇ（２ｎｄ１ｉｄｉｔ−ｉｏｎ
）ＨＶｏ１３．ｐ２５０−ｐ２５３）が使用されている
が、セメント中の塩類の影響により、ＩＩＰＭＣあるい
はＩｌｌ！ＭＣを使用してもセメント系マトリックスの
ゲル化温度は、５０〜ｖｏ’ｃ前後であり、ゲル化を防
ぐことは不可能で抜本的な解決には至っていない。So, as a way to improve the gelling properties of MC? IC
Hydroxypropyl methyl cellulose (hereinafter referred to as IIPMC) is obtained by adding propylene oxide to MC, or hydroxyethyl methyl cellulose (hereinafter referred to as Ill!MC) is obtained by adding ethylene oxide to MC, which has a high gelling temperature ([+ncyclopeded
ia of Polyser 5science and
Engineering (2nd1idit-ion
)HVo13. p250-p253) are used, but due to the influence of salts in cement, IIPMC or Ill! Even if MC is used, the gelation temperature of the cement matrix is around 50 to vo'c, and it is impossible to prevent gelation, so no fundamental solution has been reached.
１１ＰＭｃあるいは、ＩＩｃＭｃ以外の増粘剤としてゲ
ル化のないカルボキシメチルセルロース（ＣＭＣ） 、
ポリビニルアルコール（ＰＶＡ）、天然高分子（例エバ
、グアーガム、ローカストビンガム、プルランなど）、
ポリアクリル酸ソーダ、ポリエチレンオートナイドなど
も検討されたが、カルシウムイオンとの反応による不溶
塩の形成、可塑性付与が不十分などにより、上記の問題
点を解決するには至っていない。Non-gelling carboxymethylcellulose (CMC) as a thickener other than 11PMc or IIcMc,
Polyvinyl alcohol (PVA), natural polymers (e.g. Eva, guar gum, locust Bingham, pullulan, etc.),
Sodium polyacrylate, polyethylene autonide, and the like have been considered, but the above problems have not been solved due to the formation of insoluble salts due to reaction with calcium ions and insufficient plasticity.
本発明は、上記の諸問題を解決することを目的とする。 The present invention aims to solve the above problems.
すなわち、本発明の目的は無機系繊維および有機系繊維
からなる繊維群のうちの少なくとも一種を補強１３１組
として、配合したｔａ維補強コンクリート（ＦＲＣ）を
製造する際、繊維のセメント系マトリックス中での均一
分散を容易にし、流し込み成形法においては、流動性を
向上し欠ｍ部の発注を少なくし、表面平滑性を容易し、
また、押出成形法においては、可塑性を付与し、かつゲ
ル化を防止し、製造を容易にする繊維補強コンクリート
用混和剤を提供するごとにある。本発明者らは、上記の
問題点の解決を目的として、鋭意、実験・研究を重ね本
発明を完成するに至った。That is, the object of the present invention is to provide 131 reinforcing groups of at least one of the fiber groups consisting of inorganic fibers and organic fibers when producing TA fiber reinforced concrete (FRC) in a cement matrix of fibers. In the casting method, it improves fluidity, reduces the need for missing parts, and improves surface smoothness.
In addition, in the extrusion molding method, it is necessary to provide an admixture for fiber-reinforced concrete that imparts plasticity, prevents gelation, and facilitates production. The present inventors have completed the present invention through extensive experiments and research with the aim of solving the above-mentioned problems.
本発明の混和剤は、ＦＲＣの加工性と品質を改善するた
めのヒドロキシエチルセルロース（以下＋１［ｉｃと記
す）を有効成分として構成される０本発明のセメント系
マトリックス、Ｆ Ｉ？ Ｃの未硬化物および成形硬化
物はそれぞれ同混和剤を配合されることによって構成さ
れる。さらに本発明の方法は、１ｉＲｃに同混和剤を配
合して、未硬化物の作業性・加工性・成形性を改苦し、
１・ＲＣの成形硬化物の晶′？ｒを向上させることによ
って構成される。The admixture of the present invention is a cement-based matrix of the present invention, FI? The uncured product and molded cured product of C are each constituted by blending the same admixture. Furthermore, the method of the present invention improves the workability, workability, and moldability of the uncured product by blending the same admixture with 1iRc,
1.Crystals of molded and cured RC? It is constructed by improving r.
本発明に用いるＩＩＵｃは、コン１ンリンターやウッド
パルプをＮａ０ｌｌによってアルカリセルロースとした
後、これにエチレンオー１−サイドを付加して得られる
もので、ヒドロ−１−ソニーエールモル置ＩＭ度（Ｍ、
Ｓ）が０．５〜１０、好ましくは１〜３、ＩＩＥｃの１
％水溶液粘度（２０°Ｃ）が１ＯＯＯ〜８０００ｃｐｓ
、好ましくは３０００〜７０００ｃｐｓのもノテアル。IIUc used in the present invention is obtained by adding ethylene oxide to alkaline cellulose from container linter or wood pulp with Na0ll, and is obtained by adding hydro-1-sonyyl mol IM degree (M ,
S) is 0.5 to 10, preferably 1 to 3, 1 of IIEc
%Aqueous solution viscosity (20°C) is 100~8000cps
, preferably 3000 to 7000 cps.
１１εＣ１Ｃ１７）カ０．５より低いと、セメント系マ
ｌ−’Ｊフックス可溶なものは得られなくなる傾向があ
り、本発明の効果は充分に発揮されない。またＭＳがＩ
Ｏより高いと、その合成が困難となる傾向があり、実用
的ではない。11εC1C17) If the value is lower than 0.5, there is a tendency that a cement-based multi-'J Fuchs soluble product cannot be obtained, and the effects of the present invention are not fully exhibited. Also, MS is I
If it is higher than O, its synthesis tends to be difficult and is not practical.
１１２ｃの１％水）８液の粘度（２０°Ｃ）が、１ｏｏ
Ｏｃｐｓより小さいと、セメント硬化遅延作用が大きく
、脱型ができなかったり、押出成形品の成形後の変形、
さらにはオートクレーブ養生、水蒸気養生における亀裂
の原因となる。さらに繊維分散性や可塑性付与も小さく
なる傾向がある。一方、８０００ｃｐｓより大きいと、
肛Ｃ自体の製造が困難となる傾向があり、実用的ではな
い。The viscosity (20°C) of 112c (1% water) 8 liquid is 1oo
If it is smaller than Ocps, cement hardening retardation effect is large, demolding is not possible, deformation of extruded product after molding,
Furthermore, it causes cracks during autoclave curing and steam curing. Furthermore, fiber dispersibility and plasticity imparting also tend to be reduced. On the other hand, if it is larger than 8000 cps,
The anus C itself tends to be difficult to manufacture and is not practical.
繊維補強コンクリートは、無機系繊維として、炭素繊維
・ガラス繊維・アスベスト・スチールファイバー、有機
系繊維として、アラミド繊維・パルプ・ポリエチレン繊
維・ポリプロピレン繊維、などのなかから、少なくとも
１種を補強繊維として配合された、臂通ポルトランドセ
メント・アルミナセメント・高炉セメント・シリカセメ
ントなどの水硬性セメントと川砂・微Ｉｎな珪砂・シラ
スバルーンなどの無機軽量骨材と水とからなるもので、
これらに他のセメント混和剤である減少剤、流動化剤、
ＡＣ剤、硬化促進剤、硬化遅延剤を必要に応じて使用し
ても差支えない。Fiber-reinforced concrete contains at least one type of reinforcing fiber from among inorganic fibers such as carbon fiber, glass fiber, asbestos, and steel fiber, and organic fibers such as aramid fiber, pulp, polyethylene fiber, and polypropylene fiber. It is made of hydraulic cement such as Otong Portland cement, alumina cement, blast furnace cement, and silica cement, inorganic lightweight aggregate such as river sand, fine silica sand, and shirasu balloon, and water.
In addition to these, other cement admixtures such as reducers, superplasticizers,
An AC agent, a curing accelerator, and a curing retardant may be used as necessary.
これらのＦＩＩＣの製造において、使用される補強繊維
の量は、ＦＲＣ全星に対して０．１〜３０重■％であり
、この場合、本発明の混和剤として用いるｌｌＥＣの使
用計は、０．１〜５．０重里％（対セメント）で効果を
示すが、流し込み成形法においては０．１〜２．０ｍｗ
ｔ％（対セメント）が好ましく、さらに好ましくは０．
３〜１．ｏｆｆｌｆｆｔ％（対セメント）であり、押出
成形法においては０．５〜４．０重■％（対セメント）
が好ましく、さらに好ましくは２．０〜３．０ｍＭ％（
対セメント）である。本発明の混和剤の使用方法は、従
来の肛やＩＩＰ）ＩＣ，ＩＩＥＭｃの使用方法と同様に
行なうことができる。また本発明の混和剤を使用してノ
ＰＩＩＣノ製造も、従来ノＭｃやＩＩＰＭｃ、 Ｉｌｌ
聞合使用したＦＩＩＣの製造と同様に行なうことができ
る。In the production of these FIICs, the amount of reinforcing fibers used is 0.1 to 30% by weight based on the total FRC star, and in this case, the total amount of IIEC used as the admixture of the present invention is 0. It is effective at .1 to 5.0 mw% (based on cement), but in the pour molding method, 0.1 to 2.0 mw
t% (based on cement) is preferred, more preferably 0.
3-1. Offffft% (based on cement), and in the extrusion molding method, it is 0.5 to 4.0% by weight (based on cement)
is preferable, more preferably 2.0 to 3.0mM% (
vs. cement). The method of using the admixture of the present invention can be carried out in the same manner as the method of using conventional anal, IIP) IC, and IIEMc. In addition, the admixture of the present invention can be used to produce PIIC as well as conventional Mc, IIPMc, Ill
It can be carried out in the same manner as in the production of FIIC using a conventional method.
〔実施例］
本発明の効果を実証するために実施例を示すが、本発明
はそれらによって、何ら限定されるものではない。[Examples] Examples are shown to demonstrate the effects of the present invention, but the present invention is not limited thereto.
（実施例−１）
表−１に示す混和剤を用いて、表−２に示す配合の炭素
繊維補強ご１ンクリー） （ＣＦＩ？Ｃと記す）のペー
スト状物をつくり型枠（４０ｎｕａ Ｘ １６０ａｌＩ
ｏ Ｘ １０＋＋＋＋ａ）に流し込んで成形し、２０’
Ｃの調ｌ兄箱に入れて２４時間静置した。脱型後、オー
トクレーブ養生（１８゜”Ｃ，１０ｋｇ／ｃＪ、 ５
時間）を行なって、ＣＩ’ｌｌＣ仮を得た。使用した混
和剤と得られたＣＦＩＩＣペースト状物およびＣＦＩＩ
Ｃ板の物性は表−３に示す結果となった。(Example-1) Using the admixture shown in Table-1, a paste-like material of carbon fiber reinforced concrete (denoted as CFI?C) having the composition shown in Table-2 was made, and a formwork (40nua
o
It was placed in a size C box and left undisturbed for 24 hours. After demolding, autoclave curing (18°C, 10kg/cJ, 5
time) to obtain a CI'llC provisional. Admixture used and obtained CFIIC paste and CFII
The physical properties of the C plate were as shown in Table 3.
（実施例−２）
表−１に示す混和剤を用いて、表−４の配合のＣＦＲＣ
の押出成形品をつくり、調湿箱に入れて、２４時間静置
、そしてオートクレーブ養生（工８０°ｃ、ｉ。(Example-2) Using the admixture shown in Table-1, CFRC of the formulation shown in Table-4
An extrusion molded product was made, placed in a humidity control box, left undisturbed for 24 hours, and then autoclaved (80°C, i.
ｋｇ ／ ｃｄ、５時間）を行なって、ＣＦＲＣ押出成
形品を得た。その結果を表−５に示す。kg/cd, 5 hours) to obtain a CFRC extrusion. The results are shown in Table-5.
本発明の混和剤、混和剤配合セメント系マトリックス、
混和剤により、ＦＲＣの加工性と品質を改善する方法に
よれば、ＦＲＣをｒＭ造する際に、セメント系マトリッ
クス中の補強繊維の分散を均一にする。さらに、流し込
み成形法においては、適度な流動性を付与して、欠…部
を減少させ表面平滑仕上げを容易にする。押出成形法に
おいては、材温上昇によるゲル化やダイスの閉塞を起こ
すことなく、押出成形を容易にし、生産性・作業性を向
上させる。さらに、各原料のミキサー混合後の混合物を
湿った粉体状物あるいは、小さな団子状物とわ）棒状物
の混合体物とするために、従来のＭＣ。The admixture of the present invention, the admixture-containing cement matrix,
According to the method of improving processability and quality of FRC by using admixtures, the dispersion of reinforcing fibers in the cementitious matrix is made uniform when FRC is manufactured. Furthermore, in the casting method, appropriate fluidity is imparted to reduce defects and facilitate smooth surface finishing. In the extrusion molding method, extrusion molding is facilitated without causing gelation or die clogging due to material temperature rise, improving productivity and workability. Furthermore, in order to make the mixture of each raw material after mixing with a mixer into a wet powder or a mixture of small dumplings and sticks, a conventional MC is used.
＋１ＰＭｃ、 ＩＩＩ！ＭＣ使用時の団子状物に比べて
、１ｊｋ続工程へのベルトコンベアー移送性を向上させ
、混練回数を減少し、所要時間を短縮する等の混練均一
性の向上をもたらす、上記、いずれの成形法においても
、本発明は、Ｆｌ？Ｃの製造作業性と品質の向上に著し
い効果を奏するものである。+1PMc, III! Any of the above-mentioned moldings improves the belt conveyor transferability to the 1jk subsequent process, reduces the number of times of kneading, and improves the uniformity of kneading, such as shortening the required time, compared to the dumpling-like material when using MC. The present invention also applies to Fl? This has a remarkable effect on improving the manufacturing workability and quality of C.
Claims (1)
し、そのヒドロキシエチルモル置換度が０．５〜１０で
あり、その１％水溶液粘度が１０００〜８０００ｃｐｓ
（２０℃）であることを特徴とする繊維補強コンクリー
トの加工性と品質を改善するための混和剤。２、請求項
１記載の混和剤を配合され、品質を改善された繊維補強
コンクリート硬化物。1. Contains hydroxyethyl cellulose as an active ingredient, has a hydroxyethyl molar substitution degree of 0.5 to 10, and has a 1% aqueous solution viscosity of 1000 to 8000 cps
(20°C) An admixture for improving the workability and quality of fiber-reinforced concrete. 2. A cured fiber-reinforced concrete whose quality has been improved by adding the admixture according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63255617A JP2791054B2 (en) | 1988-10-11 | 1988-10-11 | Admixture for fiber reinforced concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63255617A JP2791054B2 (en) | 1988-10-11 | 1988-10-11 | Admixture for fiber reinforced concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02102154A true JPH02102154A (en) | 1990-04-13 |
| JP2791054B2 JP2791054B2 (en) | 1998-08-27 |
Family
ID=17281234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63255617A Expired - Lifetime JP2791054B2 (en) | 1988-10-11 | 1988-10-11 | Admixture for fiber reinforced concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2791054B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05147995A (en) * | 1991-06-25 | 1993-06-15 | Jdc Corp | Concrete composition |
| US6843845B2 (en) * | 2002-03-11 | 2005-01-18 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125525A (en) * | 1974-08-27 | 1976-03-02 | Toyo Boseki | GARASUSENIHOKYOSEMENTOSEIHIN NO SEIZOHOHO |
| JPS60239348A (en) * | 1984-05-14 | 1985-11-28 | ダイセル化学工業株式会社 | Admixer for cement extrusion moldings |
| JPS61151074A (en) * | 1984-12-24 | 1986-07-09 | ダイセル化学工業株式会社 | Improvement of operating lightweight concrete |
-
1988
- 1988-10-11 JP JP63255617A patent/JP2791054B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5125525A (en) * | 1974-08-27 | 1976-03-02 | Toyo Boseki | GARASUSENIHOKYOSEMENTOSEIHIN NO SEIZOHOHO |
| JPS60239348A (en) * | 1984-05-14 | 1985-11-28 | ダイセル化学工業株式会社 | Admixer for cement extrusion moldings |
| JPS61151074A (en) * | 1984-12-24 | 1986-07-09 | ダイセル化学工業株式会社 | Improvement of operating lightweight concrete |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05147995A (en) * | 1991-06-25 | 1993-06-15 | Jdc Corp | Concrete composition |
| US6843845B2 (en) * | 2002-03-11 | 2005-01-18 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2791054B2 (en) | 1998-08-27 |
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