JPH04153429A - Water expansion cut-off member - Google Patents
Water expansion cut-off memberInfo
- Publication number
- JPH04153429A JPH04153429A JP27764790A JP27764790A JPH04153429A JP H04153429 A JPH04153429 A JP H04153429A JP 27764790 A JP27764790 A JP 27764790A JP 27764790 A JP27764790 A JP 27764790A JP H04153429 A JPH04153429 A JP H04153429A
- Authority
- JP
- Japan
- Prior art keywords
- water
- swellable
- hydrophilic short
- short fiber
- pts
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000000835 fiber Substances 0.000 claims abstract description 27
- 239000000126 substance Substances 0.000 claims abstract description 19
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 50
- 238000010276 construction Methods 0.000 abstract description 6
- 229920000742 Cotton Polymers 0.000 abstract description 5
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 2
- 239000000440 bentonite Substances 0.000 abstract description 2
- 229910000278 bentonite Inorganic materials 0.000 abstract description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 229920003052 natural elastomer Polymers 0.000 abstract description 2
- 229920001194 natural rubber Polymers 0.000 abstract description 2
- 229920001971 elastomer Polymers 0.000 description 19
- 239000005060 rubber Substances 0.000 description 12
- 239000000806 elastomer Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000010828 elution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- -1 polyoxyethylene Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229920000247 superabsorbent polymer Polymers 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 1
- GJIIAJVOYIPUPY-UHFFFAOYSA-N 2-methylidenebut-3-enoic acid Chemical compound OC(=O)C(=C)C=C GJIIAJVOYIPUPY-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 229920006221 acetate fiber Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920003211 cis-1,4-polyisoprene Polymers 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229940047670 sodium acrylate Drugs 0.000 description 1
- 239000004583 superabsorbent polymers (SAPs) Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、コンクリート打継ぎ部位に埋設され、この部
位からの漏水を阻止するために用いられる水膨張止水材
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water-expandable water stop material that is buried in a concrete joint site and used to prevent water leakage from this site.
（従来の技術）
最近、高吸水性ポリマーを使用した土木建築用止水材が
広汎に使用されるようになって来でいる。(Prior Art) Recently, water-stopping materials for civil engineering and construction using superabsorbent polymers have come into widespread use.
こうした水膨張止水材は、セグメント間の止水用のもの
で、例えば、高吸水性ポリマーをゴム、プラスチック等
の固定材と混合、成形し、コンクリート打継ぎ部位に施
工し、漏水を防止している。These water-expanding water-stopping materials are used to stop water between segments.For example, they are made by mixing a super absorbent polymer with fixing materials such as rubber or plastic, molding the material, and applying it to concrete joints to prevent water leakage. ing.
この場合、−次コンクリートと二次コンクリートとの間
に水膨張止水材を施工すると、外部より浸潤してくる地
下水等によって止水材中の高吸水性ポリマーが膨張し、
ゴム等の固定材を押し広げることで、成形品である水膨
張止水材全体が膨張し、この結果、止水材が一次コンク
リートと二次コンクリートとの双方に対して圧着し、こ
の圧着力によって打継ぎ部位からの漏水を防止するもの
である。In this case, if a water-expandable water stop material is installed between the primary concrete and the secondary concrete, the superabsorbent polymer in the water stop material will expand due to groundwater, etc. infiltrating from the outside.
By pushing out the fixing material such as rubber, the entire water-expandable water-stopping material, which is a molded product, expands, and as a result, the water-stopping material presses against both the primary concrete and the secondary concrete, and this pressure increases. This prevents water from leaking from the joint area.
こうした水膨張止水材の組成として、従来、以下のよう
なものが知られている。Conventionally, the following compositions of water-swellable waterproof materials are known.
親水性基であるポリオキシエチレングリコール等を用い
て重合した水膨張ポリウレタンを高分子弾性体中に混合
した組成物
高分子弾性体に水膨張ポリウレタンをグラフトした化合
物
吸水性無機フィラー（シリカゲル、ホワイトカーボン、
ベントナイト）や有機吸水性物質（架橋ポリアクリル酸
ソーダ等）を高分子弾性体に配合した組成物
（発明が解決しようとする課題）
しかし、これらの組成物では、コンクリート打継ぎ部位
よりの漏水を阻止するために最低限必要な膨張率を水膨
張止水材に付与するためには、本来疎水性である高分子
弾性体に対し、吸水性物質を大量に配合することが不可
欠であった。A composition in which water-swellable polyurethane polymerized using hydrophilic groups such as polyoxyethylene glycol is mixed into an elastomer polymer.A compound in which water-swellable polyurethane is grafted onto an elastomer polymer.Water-absorbing inorganic fillers (silica gel, white carbon, etc.) ,
Compositions containing organic water-absorbing substances (cross-linked sodium acrylate, etc.) and elastomeric polymers (problems to be solved by the invention) However, these compositions do not have the ability to prevent water leakage from concrete pouring joints. In order to provide the water-swelling waterproof material with the minimum necessary expansion coefficient to prevent water-swelling, it is essential to blend a large amount of water-absorbing substance into the originally hydrophobic polymeric elastomer.
しかし、こうした水膨張止水材では、高価な吸水性物質
を多量に配合させているためコストが上昇する。また、
高分子固定材の含有比が相対的に少なくなるので材料の
強度も低い。更に、水膨張止水材を長期間使用するうち
、吸水性物質の一部が熔出し、使用当初より水膨張倍率
がかなり低下してしまうという欠点があった。However, such water-swellable water-stopping materials contain a large amount of expensive water-absorbing substances, which increases costs. Also,
Since the content ratio of the polymer fixing material is relatively low, the strength of the material is also low. Furthermore, when the water-swelling water-stopping material is used for a long period of time, a portion of the water-absorbing substance melts out, resulting in a disadvantage that the water-swelling ratio becomes considerably lower than when it was first used.
また、ポリオキシエチレングリコールをポリウレタン樹
脂等に適用した水膨張止水材は、セメントのアルカリに
よる加水分解が発生するためか耐久性に劣る。In addition, water-swellable waterproof materials in which polyoxyethylene glycol is applied to polyurethane resins are inferior in durability, probably due to hydrolysis caused by the alkali of cement.
一方、特開昭６４−６６２８５号公報においては、炭素
繊維、ポリプロピレン繊維、チタン酸カリウムウィスカ
ー等の疎水性繊維をゴム等に配合し、疎水性繊維を長尺
方向に配合させ、長尺方向への水膨張止水材の膨張によ
る施工後の水膨張止水材の蛇行を抑える技術が開示され
ている。On the other hand, in JP-A No. 64-66285, hydrophobic fibers such as carbon fibers, polypropylene fibers, potassium titanate whiskers, etc. are blended with rubber, etc., and the hydrophobic fibers are blended in the longitudinal direction. A technique for suppressing meandering of a water-expandable water-stop material after construction due to expansion of the water-expandable water-stop material is disclosed.
しかし、こうした技術では、通常の水膨張止水材よりも
水膨張倍率が低くなるため、止水性能に劣り、実用上不
適当であった。However, in this technique, the water expansion ratio is lower than that of ordinary water-swellable water-stopping materials, so the water-stopping performance is poor and it is not suitable for practical use.
本発明の課題は、従来よりも少量の吸水性物質を含有し
、かつ従来の水膨張止水材と同等又はそれを超える漏水
阻止性能を有する水膨張止水材を提供することである。An object of the present invention is to provide a water-swellable water-stopping material that contains a smaller amount of water-absorbing material than conventional water-swellable water-stopping materials and has water leakage prevention performance equivalent to or exceeding that of conventional water-swellable waterstopping materials.
（課題を解決するための手段）
本発明は、吸水により膨張する水膨張性物質と固定材と
しての高分子弾性体とを含有する、コンクリート打継ぎ
部用の水膨張止水材において、前記高分子弾性体中に、
親水性短繊維を含有させる事を特徴とする水膨張止水材
に係るものである。(Means for Solving the Problems) The present invention provides a water-swelling water stop material for concrete pouring joints, which contains a water-swellable substance that expands upon water absorption and an elastic polymer as a fixing material. In the molecular elastic body,
This invention relates to a water-swellable waterproof material characterized by containing hydrophilic short fibers.
（作 用）
本発明に係る水膨張止水材によれば、親水性短繊維を含
有しているので、この親水性短繊維の高い表面張力によ
って、水膨張止水材の外側表面に存在する水を、止水材
の内部まで親水性短繊維を通じて誘導する作用がある。(Function) According to the water-swellable water-stop material of the present invention, since it contains hydrophilic short fibers, the high surface tension of the hydrophilic short fibers causes the water-swellable water-stop material to be present on the outer surface of the water-swellable water-stop material. It has the effect of guiding water to the inside of the water-stopping material through the hydrophilic short fibers.
従って、止水材本体の全体に亘って分布する水膨張性物
質に対して従来よりも多くの水を、満遍なく、均一に誘
導することができるので、水膨張倍率を大きくできると
共に、従来よりも水膨張性物質の含有比を減らしても、
従来以上の漏水阻止性能を確保できる。Therefore, more water than before can be evenly and uniformly guided to the water-swellable substance distributed over the entire body of the water-stopping material, making it possible to increase the water-swelling ratio and more than before. Even if the content ratio of water-swellable substances is reduced,
It is possible to ensure water leakage prevention performance that is better than before.
そして、このように高価な水膨張性物質の配合比を減ら
すことができることから、水膨張止水材のコストダウン
を実現できる。また、相対的に高分子弾性体固定材を多
く配合することができるため、水膨張止木材の機械的強
度を大きくすることができる。更に、水膨張性物質の配
合比を減らずことで、施工後の吸水性物質の溶出を非常
に少なくでき、長期に亘って漏水防止性能を発揮させる
ことができる。Since the blending ratio of such an expensive water-swellable substance can be reduced, the cost of the water-swellable waterproof material can be reduced. Moreover, since a relatively large amount of the polymeric elastic body fixing material can be blended, the mechanical strength of the water-swelling inhibiting wood can be increased. Furthermore, by not reducing the blending ratio of the water-swellable substance, the elution of the water-absorbing substance after construction can be extremely reduced, and water leakage prevention performance can be exhibited over a long period of time.
このように、本発明の水膨張止水材は、コスト低減が可
能で、水膨張速度、倍率、引張強度が大きく、長期間に
亘って安定した止水性能を発揮しうるものである。As described above, the water-swellable water-stopping material of the present invention enables cost reduction, has high water-swelling speed, magnification, and tensile strength, and can exhibit stable water-stopping performance over a long period of time.
高分子弾性体としては、天然ゴム、合成シス１．４−ポ
リイソプレンゴム、ポリブタジェンゴム、スチレン−ブ
タジェン共重合ゴム、アクリロニトリル−ブタジェン共
重合ゴム、クロロプレンゴム、イソプレン−イソブチレ
ン共重合ゴム、エチレンプロピレン−ジエン共重合ゴム
、トランス−１゜４−ポリイソブチレンゴム、スチレン
−ブタジェンブロック共重合ゴム、スチレン−イソプレ
ンブロック共重合ゴム、塩素化ポリエチレン、軟質ポリ
塩化ビニル、ポリウレタン等が挙げられる。Examples of the polymeric elastomer include natural rubber, synthetic cis-1,4-polyisoprene rubber, polybutadiene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, chloroprene rubber, isoprene-isobutylene copolymer rubber, and ethylene. Examples include propylene-diene copolymer rubber, trans-1°4-polyisobutylene rubber, styrene-butadiene block copolymer rubber, styrene-isoprene block copolymer rubber, chlorinated polyethylene, flexible polyvinyl chloride, and polyurethane.
水膨張性物質としては、高吸水性ポリアクリル酸塩系樹
脂、イソブチレン−（無水）マレイン酸系共重合体、ス
チレン−（無水）マレイン酸系共重合体、架橋ポリビニ
ルアルコール、ウレタン系樹脂、酢酸ビニル−アクリル
酸エステル共重合体ケン化物、ポリアクリロニトリル系
繊維加水分解物、ベントナイト、ホワイトカーボン、シ
リカゲル等を例示できる。Water-swellable substances include highly water-absorbent polyacrylate-based resins, isobutylene-(anhydrous) maleic acid-based copolymers, styrene-(anhydrous) maleic acid-based copolymers, cross-linked polyvinyl alcohol, urethane-based resins, and acetic acid. Examples include saponified vinyl-acrylic acid ester copolymer, hydrolyzed polyacrylonitrile fiber, bentonite, white carbon, and silica gel.
親水性短繊維としては、２０°Ｃ１９５％相対湿度にお
ける吸収率が１重量％以上の繊維、すなわち木綿、パル
プ、紙片、再生セルロース繊維、アセテート繊維、アク
リル繊維、ホルマール化ポリビニルアルコール繊維、ナ
イロン繊維が好ましい。親水性短繊維の太さは、水膨張
止水材の強度と水膨張効率を考慮すると、直径０．１
μｍ−１００μｍの範囲とすることが好ましい。Examples of hydrophilic short fibers include fibers with an absorption rate of 1% by weight or more at 20°C and 195% relative humidity, such as cotton, pulp, paper chips, regenerated cellulose fibers, acetate fibers, acrylic fibers, formalized polyvinyl alcohol fibers, and nylon fibers. preferable. Considering the strength and water expansion efficiency of the water-swellable waterproof material, the thickness of the hydrophilic short fibers is 0.1 in diameter.
It is preferable to set it as the range of micrometer - 100 micrometers.
親水性短繊維の長さは、水膨張止水材の中心まで誘水す
る機能と、水膨張止水材中に於いての短繊維の蛇行を考
慮すると、平均長が０．１ｍｍ以上、１０ｍｍ以下が好
ましい。繊維長が０．１ｍｍより短かいと、誘水機能が
十分でなく、また１０ｍｍを超えるものは、高分子弾性
体との混練が困難である。Considering the function of attracting water to the center of the water-swellable water-stop material and the meandering of the short fibers in the water-swellable water-stop material, the average length of the hydrophilic short fibers should be 0.1 mm or more and 10 mm. The following are preferred. If the fiber length is shorter than 0.1 mm, the water attracting function will not be sufficient, and if the fiber length exceeds 10 mm, it will be difficult to knead with the polymeric elastomer.
高分子弾性体１００重量部に対する親水性短繊維の配合
重量は、０．０１重量部以上、５重量部以下とするのが
好ましい。特に、配合量を０．１〜２．５重量部とする
と水膨張止水材の水膨張率がピークとなり、この範囲を
超えると、逆に短繊維が水膨張止水材の吸水時の膨張を
拘束する力が増すため、水膨張率が下がってくる傾向が
ある。そして、親水性短繊維の配合比が５重量部を超え
ると、上記に加えて、水膨張止水材組成物を製造する際
に、混練加工性、圧延、押出し加工性が悪化する傾向が
あり、１０重量部を超えると、水膨張率、生産性共に非
常に悪化する。一方、親水性短繊維の配合量が０．０１
重量部以下であると、水膨張促進の効果が得られない。The blending weight of the hydrophilic short fibers with respect to 100 parts by weight of the polymer elastic body is preferably 0.01 parts by weight or more and 5 parts by weight or less. In particular, when the blending amount is 0.1 to 2.5 parts by weight, the water expansion coefficient of the water-swelling water-stopping material reaches its peak, and when this range is exceeded, the short fibers increase when the water-swelling water-stopping material expands upon water absorption. The water expansion rate tends to decrease because the force that restrains the water increases. If the blending ratio of hydrophilic short fibers exceeds 5 parts by weight, in addition to the above, kneading processability, rolling and extrusion processability tend to deteriorate when producing a water-swellable waterstop material composition. If the amount exceeds 10 parts by weight, both the water expansion coefficient and productivity will deteriorate significantly. On the other hand, the amount of hydrophilic short fibers is 0.01
If the amount is less than 1 part by weight, the effect of promoting water expansion cannot be obtained.
水膨張性物質の配合量は、本発明に従って低減すること
が可能であり、具体的には、高分子弾性体１００重量部
に対し１〜５０重量部添加することができるが、３〜３
５重量部とすることが好ましい。The amount of the water-swellable substance can be reduced according to the present invention, and specifically, it can be added in an amount of 1 to 50 parts by weight per 100 parts by weight of the elastomer, but it can be added in an amount of 3 to 3 parts by weight.
The amount is preferably 5 parts by weight.
本発明の水膨張止水材を製造するには、ゴム工業の常法
に従い、高分子弾性体、水膨張性物質及び親水性短繊維
を混練し、カレンダー法、押出し法等の公知の成形法に
より成形加工し、必要により架橋させる。この混練段階
では、必要に応じ、親水性無機フィラー、各種充填剤、
加硫剤、可塑剤、軟化剤等を添加する。In order to produce the water-swellable water-stopping material of the present invention, a polymeric elastomer, a water-swellable substance, and a hydrophilic short fiber are kneaded according to a conventional method in the rubber industry, and a known molding method such as a calendering method or an extrusion method is used. The material is molded and, if necessary, crosslinked. At this kneading stage, hydrophilic inorganic fillers, various fillers,
Add vulcanizing agents, plasticizers, softeners, etc.
（実施例）
次記表に示す各実施例及び比較例の組成を有する配合物
を、それぞれ１０インチオープンロールによって混練し
、次いでこの１０インチオーブンロールで厚さ２ｍｍの
シート状に圧延する。そして、これら各シートを２０ｍ
ｍＸ１００ ｍｍの長方形にカットシ、水膨張倍率等を
測定した。比較例２、実施例６については２ｍｍのシー
トを圧延したのちプレス加硫によって２０ｍｍＸ １０
０ｍｍのシートを得、同様に水膨張倍率を測定した。こ
の測定結果も下記表に示す。(Example) Blends having the compositions of the Examples and Comparative Examples shown in the following table are kneaded using a 10-inch open roll, and then rolled into a sheet with a thickness of 2 mm using the 10-inch oven roll. And each of these sheets is 20m long.
Cutting area, water expansion ratio, etc. were measured on a rectangle of m x 100 mm. For Comparative Example 2 and Example 6, a 2 mm sheet was rolled and then press vulcanized to 20 mm x 10 sheets.
A 0 mm sheet was obtained and the water expansion ratio was measured in the same manner. The measurement results are also shown in the table below.
なお、木綿は、綿布を５ｍｍの幅に切断し、綿状にほぐ
して短繊維としたものを用いた。Note that the cotton used was a cotton cloth cut into 5 mm width and loosened into cotton-like short fibers.
但し、表において、［配合比Ｊの数字はすべて「重量部
」を示すものである。また、「木綿」の直径は１０μｍ
、長さは５薗であり、「バルブ」の直径は５μｍ〜２０
μｍ、平均長さは５ｍｍである。However, in the table, all numbers in the compounding ratio J indicate "parts by weight." Also, the diameter of “cotton” is 10 μm
, the length is 5 mm, and the diameter of the "bulb" is 5 μm to 20 μm.
μm, average length is 5 mm.
水膨張倍率（％）については、水膨張止水材を２５°Ｃ
で７日間水中に浸漬した後、下記式に従って測定した。Regarding water expansion ratio (%), water expansion water stop material is heated to 25°C.
After being immersed in water for 7 days, measurements were made according to the following formula.
水膨張倍率（％）−（水膨張後の止水材の重量／水膨張
前の止水材の重量）ｘ１００
水膨張性物質の溶出については、水膨張止水材を６０°
Ｃの温水中に４０日間浸漬し、水膨張性物質の溶出の有
無を確認した。ここで、ＮＤは、検出限界外であったこ
とを示す。Water expansion magnification (%) - (Weight of water stop material after water expansion/Weight of water stop material before water expansion) x 100 For elution of water swelling substances, hold the water expansion water stop material at 60°
The sample was immersed in hot water of C for 40 days, and the presence or absence of elution of water-swellable substances was confirmed. Here, ND indicates that it was outside the detection limit.
表から解るように、実施例の水膨張止水材によれば、少
なくとも比較例と同等以上の水膨張倍率が得られており
、引張強度が大きく、水膨張性物質の溶出も検出できな
かった。As can be seen from the table, according to the water-swellable water-stopping material of the example, a water-swelling ratio at least equal to or higher than that of the comparative example was obtained, the tensile strength was high, and no elution of water-swellable substances could be detected. .
Claims (1)
高分子弾性体とを含有する、コンクリート打継ぎ部用の
水膨張止水材において、前記高分子弾性体中に、親水性
短繊維を含有させる事を特徴とする水膨張止水材。1. A water-swelling water stop material for concrete pouring joints containing a water-swellable substance that expands upon water absorption and an elastic polymer as a fixing material, in which hydrophilic short fibers are contained in the elastic polymer. A water-swellable waterproof material characterized by containing water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27764790A JPH04153429A (en) | 1990-10-18 | 1990-10-18 | Water expansion cut-off member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27764790A JPH04153429A (en) | 1990-10-18 | 1990-10-18 | Water expansion cut-off member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04153429A true JPH04153429A (en) | 1992-05-26 |
Family
ID=17586341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27764790A Pending JPH04153429A (en) | 1990-10-18 | 1990-10-18 | Water expansion cut-off member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04153429A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06193088A (en) * | 1992-12-28 | 1994-07-12 | Kajima Corp | Construction method for underground water barrier |
| JPH06212687A (en) * | 1993-01-14 | 1994-08-02 | Arai Kensetsu Kk | Complex building |
| JPH06235224A (en) * | 1993-01-25 | 1994-08-23 | American Colloid Co | Trapizoidal treating method |
-
1990
- 1990-10-18 JP JP27764790A patent/JPH04153429A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06193088A (en) * | 1992-12-28 | 1994-07-12 | Kajima Corp | Construction method for underground water barrier |
| JPH06212687A (en) * | 1993-01-14 | 1994-08-02 | Arai Kensetsu Kk | Complex building |
| JPH06235224A (en) * | 1993-01-25 | 1994-08-23 | American Colloid Co | Trapizoidal treating method |
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