JP2009256971A - Joint structure - Google Patents
Joint structure Download PDFInfo
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- JP2009256971A JP2009256971A JP2008107580A JP2008107580A JP2009256971A JP 2009256971 A JP2009256971 A JP 2009256971A JP 2008107580 A JP2008107580 A JP 2008107580A JP 2008107580 A JP2008107580 A JP 2008107580A JP 2009256971 A JP2009256971 A JP 2009256971A
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- 239000003566 sealing material Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 24
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 20
- OYQYHJRSHHYEIG-UHFFFAOYSA-N ethyl carbamate;urea Chemical compound NC(N)=O.CCOC(N)=O OYQYHJRSHHYEIG-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920000233 poly(alkylene oxides) Polymers 0.000 claims abstract description 12
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims abstract description 11
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 claims description 10
- 239000004593 Epoxy Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 29
- 239000011248 coating agent Substances 0.000 abstract description 20
- 238000000576 coating method Methods 0.000 abstract description 18
- 239000003822 epoxy resin Substances 0.000 abstract description 4
- 230000002262 irrigation Effects 0.000 abstract description 4
- 238000003973 irrigation Methods 0.000 abstract description 4
- 229920000647 polyepoxide Polymers 0.000 abstract description 4
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 abstract 2
- 239000000463 material Substances 0.000 description 16
- 210000001503 joint Anatomy 0.000 description 14
- 230000008439 repair process Effects 0.000 description 8
- 238000012856 packing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- ALYNCZNDIQEVRV-UHFFFAOYSA-N 4-aminobenzoic acid Chemical compound NC1=CC=C(C(O)=O)C=C1 ALYNCZNDIQEVRV-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229960004050 aminobenzoic acid Drugs 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229920005570 flexible polymer Polymers 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000162 poly(ureaurethane) Polymers 0.000 description 1
- 239000011414 polymer cement Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011359 shock absorbing material Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- -1 waterproof sheet Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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Abstract
Description
本発明は用水路の目地構造に関するものである。 The present invention relates to a joint structure of a water channel.
コンクリート構造物の水槽や水路の伸縮目地は止水板とエラスタイト等で漏水防止をしている。止水板・ゴムパッキン・シーリング材の経年劣化等により伸縮目地部より漏水があり、補修としてシーリング材充填や、ゴムパッキン装着や、柔軟性ポリマーセメント塗布等をしている。これらの劣化により、漏水や背面水の流入すなわち湧水が発生する。ゴムパッキンによる補修はコンクリート目地部を切削して目地幅を広くして行い、施工費用が割高となる他、破損がパッキン幅より広い時や複雑な形状となっている時には採用することができない。 Water tanks for concrete structures and expansion joints for waterways are used to prevent water leakage with waterstops and elastite. There is water leakage from the expansion joint due to aging deterioration of the water stop plate, rubber packing, and sealing material, etc. As a repair, sealing material filling, rubber packing mounting, flexible polymer cement coating, etc. are performed. Due to these deteriorations, water leakage and inflow of backwater, that is, spring water are generated. Repair with rubber packing is performed by cutting the concrete joints to widen the joint width, which increases the construction cost and cannot be adopted when the damage is wider than the packing width or when the shape is complicated.
下記の様な様々な構造、工法が開示されているが、作業性・耐久性等すべてが満足できるものではない。 Various structures and construction methods as described below are disclosed, but not all of workability and durability are satisfactory.
セメント、砂及び２０ＧＰａ以上の弾性率の繊維を含有し、水路壁面のモルタル基材の接続部に、弾性衝撃吸収材が２０ＧＰａ以上の弾性率の繊維を含有するセメントモルタル系固定材を介して挟接され、この弾性衝撃吸収材とそれを挟接するセメントモルタル系固定材とが隣り合う目地間に打ち継ぎ部のない塗工モルタル基材と弾性保護材とにより覆設されてなる目地部を有するもので、農業用水路等の水理関連設備に用いられるコンクリート製水路構造体について施工が容易で、長期に亘り強度面、剛性面、防水面、化学的な耐久性の点で、高い信頼性のある水路壁面に修復されたコンクリート製水路壁面構造体とその補修工法が開示されている。（特許文献１） Cement, sand, and fibers with an elastic modulus of 20 GPa or more are contained, and the elastic shock absorber is sandwiched between the mortar bases of the channel wall via cement mortar fixing materials containing fibers with an elastic modulus of 20 GPa or more. The elastic impact absorbing material and the cement mortar fixing material sandwiching the elastic shock absorbing material are jointed by a coating mortar base material having no joint between adjacent joints and an elastic protective material. It is easy to construct a concrete waterway structure used for hydraulic equipment such as agricultural waterways, and has high reliability in terms of strength, rigidity, waterproofing, and chemical durability over a long period of time. A concrete waterway wall structure repaired to a certain waterway wall surface and a repair method thereof are disclosed. (Patent Document 1)
無機質浸透性防水塗材と特殊アクリル系混和液とを混合状にして塗装した軟質防水薄膜層、その上のプライマー、さらに無機質結合材、骨材、および添加剤を加えた主材と、アクリル樹脂エマルジョン、水、添加剤からなる混和液とを混合したハイブリットモルタルを塗布した上、グラスファイバー製メッシュを貼着し、さらに同ハイブリットモルタルを厚塗りした軟質補強層、その上層としてハイブリットモルタルを塗装した軟質表面防水層からなるコンクリートトラフ用目地防水皮膜が開示されている。（特許文献２） A soft waterproof thin film layer coated with a mixture of an inorganic permeable waterproof coating material and a special acrylic mixture, a primer thereon, an inorganic binder, an aggregate, a main material with additives, and an acrylic resin A hybrid mortar mixed with an emulsion, water, and an admixture consisting of additives was applied, a glass fiber mesh was applied, a soft reinforcing layer with a thick coating of the hybrid mortar, and a hybrid mortar was applied as the upper layer. A joint waterproof coating for a concrete trough comprising a soft surface waterproof layer is disclosed. (Patent Document 2)
Ｕ字状のコンクリートブロックを多数配して形成される農業用水路において、各ブロック間の隙間にパッキンを水路の内面と面一もしくは内面より落ち込んだ状態に充填して目地を形成し、該目地に沿って、無溶剤ポリウレタン樹脂塗料より成る０．５ｍｍ〜３ｍｍ厚の塗膜帯を、目地の前後に配したブロックの縁部及び目地を覆う幅にてブロックの左上縁から右上縁に亘って一連に設けた農業用水路でコンクリートブロック同士のズレやコンクリートの変形に対する追従性の高いジョイント部を有し、漏水が少ないことが開示されている。（特許文献３） In agricultural canals formed by arranging a large number of U-shaped concrete blocks, packing is filled in the gaps between the blocks so as to be flush with the inner surface of the water channel or in a state of falling from the inner surface, and the joints are formed. A series of 0.5 mm to 3 mm thick coating strips made of solvent-free polyurethane resin paint from the upper left edge of the block to the upper right edge with a width covering the edge of the block and the joint. It has been disclosed that the agricultural waterway provided in has a joint portion with high followability to the displacement between concrete blocks and deformation of the concrete, and there is little water leakage. (Patent Document 3)
コンクリート製水路部材を長手方向に複数配置してなる水路の水路部材同士の目地部からの漏水を止めるコンクリート水路目地部の遮水構造において、水路部材内面の目地部を含む周辺に少なくともセメントと樹脂エマルションからなる接着層、防水シート、少なくともセメントと樹脂エマルションからなる表面層の順で積層配置してなるコンクリート水路目地部遮水構造が既設のシーリング材を撤去することなく目地部の遮水の補修を行うことができるとともに、下地が水分を含んだ状態でも施工作業をすることが可能であり、漏水防止性能にも優れ目地部からの亀裂の発生も少ないことが開示されている。（特許文献４） In a water-blocking structure of a concrete waterway joint that stops leakage from the joints of the waterway members of a waterway formed by arranging a plurality of concrete waterway members in the longitudinal direction, at least cement and resin around the joints on the inner surface of the waterway member Adhesive layer made of emulsion, waterproof sheet, concrete water channel joint water shielding structure formed by laminating at least a surface layer made of cement and resin emulsion in order to repair the water shielding of joint parts without removing the existing sealing material In addition, it is disclosed that the construction work can be performed even in a state in which the base contains moisture, the water leakage prevention performance is excellent, and the occurrence of cracks from the joint portion is small. (Patent Document 4)
農業用水路の目地に施される充填材の表面および左右両側面に一定幅でプライマを塗布し、プライマの横幅の範囲内で弾性のある樹脂材を一定肉厚で塗布してから、その上に低伸縮性の素材で作ったメッシュ状のシート材を配置し、当該シート材の上に弾性のある樹脂材を一定肉厚で塗布し、これらの樹脂材を養生させて、目地の破損を防止し、経年劣化を抑えることが開示されている。（特許文献５）
解決しようとする課題は、用水路目地の耐久性及び耐磨耗性を有する目地構造及び改修方法である。 The problem to be solved is a joint structure and a repair method having durability and wear resistance of the irrigation joint.
請求項１の発明は、コンクリート製用水路、水路式側溝の目地構造であって、当該目地部、或いは被覆モルタルにより被覆されていない当該目地部に同等或いは広い溝が形成され、この目地部或いは前記形成された溝に必要に応じてプライマーが処理され、シーリング材が充填され、次いで必要に応じてプライマーが処理され、更にウレアウレタン樹脂被覆が施されてなることを特徴とする目地構造で、耐久性があり、水路面及び背面の両面からの止水性があり、また、作業性が高く、既設目地にも対応ができる。
The invention of
請求項２の発明は、前記シーリング材がシリル基末端ポリアルキレンオキサイド樹脂、或いはシリル基末端ポリアルキレンオキサイド樹脂のエポキシ樹脂変性樹脂であることを特徴とする請求項１のに記載の目地構造で、コンクリートとの密着性が優れ、耐水、耐アルカリ性に優れ、止水耐圧性が高い。
The invention according to
本発明により、用水路の目地部の止水性及びその耐久性が向上し、また、処理作業が簡単で、既設補修が容易に行える。 According to the present invention, the water stoppage and durability of the joint portion of the irrigation channel are improved, the processing operation is simple, and the existing repair can be easily performed.
本発明は伸縮追従性が高いシーリング材を目地部に充填し、さらに高強度で伸びが大きく耐摩耗性が高いウレアウレタン樹脂で目地部或いは目地部上に被覆モルタルの目地幅より広い溝より１０ｍｍ以上幅広い部分に被覆することで前記シーリング材の耐久性、耐摩耗性、止水機能を向上させ、目地構造の信頼性を向上させる。 The present invention fills the joint with a sealing material having high stretchability and is a urea urethane resin having high strength, high elongation and high wear resistance, and is 10 mm from the groove wider than the joint width of the coated mortar on the joint or joint. By covering a wide area as described above, the durability, wear resistance, and water stop function of the sealing material are improved, and the reliability of the joint structure is improved.
コンクリート或いはコンクリート２次製品の用水路は環境、形状、施工方法、使用部材等によって目地の幅は異なる。このため、具体的な寸法は明記できないが、新設時に挿入したパッキン等でなければ、容易に、シーリング材等止水材を施工することは難しい。本発明は既設の補修に限らないが、既設の目地形状が明確でなく、崩れたもの、または目地に無機系シーリングが施され、これを除去して、補修する場合にも有効である。既設の目地としてはモルタル系のシーリング材を充填していることが多く、これを除去して、弾性シーリング材を充填するが、施工当初の形状は保たれておらず、直線がでていない他、深部まで、古いシーリング材を除去して、さらにコンクリートの面を出すことは工数、信頼性の面で非常に危険度が高いものとなる。また、背面水圧による漏水も防ぐことができる。 The width of the joints of the irrigation channels for concrete or concrete secondary products varies depending on the environment, shape, construction method, materials used, and the like. For this reason, although specific dimensions cannot be specified, it is difficult to easily construct a water-stopping material such as a sealing material unless it is a packing or the like inserted at the time of new installation. Although the present invention is not limited to existing repairs, the shape of the existing joints is not clear, and it is also effective when repaired by removing an inorganic seal that is broken or jointed. The existing joints are often filled with mortar-based sealing material, which is removed and filled with elastic sealing material, but the initial shape is not maintained and straight lines are not formed. It is very dangerous to remove the old sealing material to the deep part and to bring out the concrete surface in terms of man-hour and reliability. In addition, leakage due to backside water pressure can also be prevented.
＜シーリング材＞
シーリング材はコンクリートのブロックの長さ、コンクリート２次製品の長さ、環境、作業性に応じて設定され、その寸法変化に安全率を付与して、伸び率が設定され、さらに環境温度に応じた伸縮繰り返しによる評価試験の結果を考慮して決定される。汎用のシーリング材で使用できるが、さらに好ましくはシリル基末端ポリアルキレンオキサイド樹脂、或いはシリル基末端ポリアルキレンオキサイド樹脂のエポキシ樹脂変性樹脂が、コンクリートの密着性、伸縮耐久性の点で好ましい。また、さらに耐水性等の点でシリル基末端ポリアルキレンオキサイド樹脂のエポキシ樹脂変性樹脂が好ましい。シリル基末端ポリアルキレンオキサイド樹脂、或いはシリル基末端ポリアルキレンオキサイド樹脂のエポキシ樹脂変性樹脂をシーリング材として使用する時はウレアウレタン被覆の範囲内で平面部に塗付しても良い。シーリング材を塗込む深さは目地部のみの場合は目地幅の２／３〜１／２塗り込み、５〜５０ｍｍが一般的である。コンクリート表面にモルタルを塗り付ける場合も同じく、目地部の幅の２／３〜１／２とすることが好ましい。
前記シリル基末端ポリアルキレンオキサイド樹脂のエポキシ樹脂変性樹脂のシーリング材としてジョリシールＪＢ−４０（アイカ工業（株）、商品名、物性例伸び率２５８％、強度１．５６ＭＰａ）が一例としてある。
<Sealing material>
The sealing material is set according to the length of the concrete block, the length of the concrete secondary product, the environment, and the workability. A safety factor is given to the dimensional change, the elongation rate is set, and further according to the environmental temperature. It is determined in consideration of the results of evaluation tests by repeated expansion and contraction. Although it can be used with a general-purpose sealing material, a silyl group-terminated polyalkylene oxide resin or an epoxy resin-modified resin of a silyl group-terminated polyalkylene oxide resin is more preferable from the viewpoint of adhesion of concrete and stretching durability. Furthermore, an epoxy resin-modified resin of a silyl group-terminated polyalkylene oxide resin is preferred from the standpoint of water resistance. When an epoxy resin-modified resin of a silyl group-terminated polyalkylene oxide resin or a silyl group-terminated polyalkylene oxide resin is used as a sealing material, it may be applied to a planar portion within the range of urea urethane coating. The depth at which the sealing material is applied is generally 2/3 to 1/2 of the joint width in the case of only the joint portion, and is generally 5 to 50 mm. Similarly, when mortar is applied to the concrete surface, the width of the joint is preferably 2/3 to 1/2.
An example of the sealing material for the epoxy resin-modified resin of the silyl group-terminated polyalkylene oxide resin is Joliseal JB-40 (Aika Kogyo Co., Ltd., trade name, physical property example, elongation rate 258%, strength 1.56 MPa).
前記シーリング材はコンクリートへの密着性をさらに向上させるため、エポキシ樹脂プライマーを使うことができる。 Since the sealing material further improves the adhesion to concrete, an epoxy resin primer can be used.
＜ウレアウレタン樹脂被覆＞
ウレアウレタン樹脂被覆は高強度で伸びが大きく耐摩耗性が高く、前記シーリング材を充填した部位より水路コンクリート表面１０ｍｍ以上を覆うことにより、脆弱コンクリート部位を除去する処理や塗布がし易い状態であることにより、目地間のシーリング材の欠点部分を補う他、伸縮繰り返しにおけるシーリング材の変形を押さえることによる耐久性を付与することができる。また、作業性、密着性、均一膜厚となる点で手作業による塗り付けができるアミノ基が芳香環に直接ついているアミンが好ましい。このポリウレアウレタンはアミンの主鎖、イソシアネートプレポリマーを合成するときのポリオールにより、適宜伸び率、強度等を有するものを調製できる。被膜の物性としては伸び率２００〜７００％、強さ１〜９ＭＰａで、目地幅と環境により、また厚さを設定する。厚さは０．５〜５ｍｍの範囲で設定される。このウレアウレタン樹脂塗材としてジョリシールＪＢＸ−１５２（アイカ工業（株）、商品名、アミノ安息香酸系、物性測定例、引張強度１０．２ＭＰａｓ、伸び率７００％、引裂強度４０Ｎ／ｍｍ）がある。
<Urea urethane resin coating>
Urea urethane resin coating has high strength, high elongation and high wear resistance, and is easy to be treated and applied to remove fragile concrete parts by covering the surface of the waterway concrete more than 10 mm from the part filled with the sealing material. Thus, in addition to compensating for the defective portion of the sealing material between joints, it is possible to impart durability by suppressing deformation of the sealing material in repeated expansion and contraction. In addition, an amine having an amino group directly attached to an aromatic ring, which can be manually applied in terms of workability, adhesion, and uniform film thickness, is preferable. This polyureaurethane can be suitably prepared with an elongation ratio, strength, etc., depending on the amine main chain and the polyol used when synthesizing the isocyanate prepolymer. As the physical properties of the coating, the elongation is 200 to 700%, the strength is 1 to 9 MPa, and the thickness is set according to the joint width and environment. The thickness is set in the range of 0.5 to 5 mm. As this urea urethane resin coating material, there is Jollisea JBX-152 (Aika Industry Co., Ltd., trade name, aminobenzoic acid type, physical property measurement example, tensile strength 10.2 MPas, elongation rate 700%, tear strength 40 N / mm). .
本発明は目地そのもの、或いはその上に被覆したモルタルに処理することができる。 The present invention can be applied to the joint itself or mortar coated thereon.
前記シーリング材を塗付したあと必要に応じてプライマーを塗布するがシーリング材とウレアウレタン樹脂被覆が十分な密着性を有する場合は省略することができる。 After applying the sealing material, a primer is applied as necessary, but may be omitted if the sealing material and the urea urethane resin coating have sufficient adhesion.
ウレアウレタン樹脂の変色・艶変化等の防止のため、耐光性の良い上塗塗材を塗布することができる。 In order to prevent discoloration and gloss change of the urea urethane resin, it is possible to apply a topcoat material with good light resistance.
既設の目地に施工する場合は既設目地のシーリング材を除去する。例えばモルタル系シーリング材であれば、ダイヤモンドカッターやたがね等で既設シーリング材を上記必要な深さに除去し、上記ウレアウレタン樹脂被覆を施す範囲と併せて脆弱コンクリートを除去する。これに対して本発明の処理をする。 When installing on existing joints, remove the sealing material from the existing joints. For example, in the case of a mortar sealant, the existing sealant is removed to the required depth with a diamond cutter or chisel, and the brittle concrete is removed together with the area where the urea urethane resin coating is applied. In contrast, the processing of the present invention is performed.
以下、実施例により、実施形態を記す。また、目地構造の効果を実験例として示す。 Hereinafter, embodiments will be described by way of examples. The effect of joint structure is shown as an experimental example.
図１の様に既設目地幅３０ｍｍの目地部を深さ２０ｍｍ除去し、この内面と目地部端部から５０ｍｍの表面を高圧水洗で、脆弱コンクリートを除去し、乾燥後アイカジョリシールＪＢ−４０Ｐ（アイカ工業（株）、商品名、溶剤型エポキシ樹脂プライマー）を０．１５ｋｇ／ｍ２塗布し、２時間後ジョリシールＪＰ−４０を充填し半日静置し、翌日ジョリシールＪＢ−４０Ｐ２（アイカ工業（株）、商品名、溶剤型エポキシ樹脂プライマー）を０．１５ｋｇ／ｍ２塗布し、２時間後目地端部より１０ｍｍ表面までにわたりジョリシールＪＢＸ−１５２を２ｋｇ／ｍ２塗布し、５時間後、更に、ジョリシールＪＢＸ−１５３（アイカ工業（（株））、アクリルウレタンコート剤）を０．２ｋｇ／ｍ２塗布し実施例１とした。 As shown in FIG. 1, the joint portion having an existing joint width of 30 mm is removed by 20 mm in depth, the fragile concrete is removed by washing with high pressure water on the inner surface and the surface of the joint portion from the end portion of the joint portion, and after drying, the Aikajoly seal JB-40P Aika Kogyo Co., Ltd., trade name, solvent-type epoxy resin primer) was applied at 0.15 kg / m 2 , 2 hours later, filled with Joliseal JP-40 and allowed to stand for half a day, and the next day Joliseal JB-40P2 (Aika Industry) Co., Ltd., trade name, solvent-type epoxy resin primer) was applied at 0.15 kg / m 2 , and after 2 hours, Joliseal JBX-152 was applied at 2 kg / m 2 from the joint edge to the surface of 10 mm, and after 5 hours. Furthermore, Joliseal JBX-153 (Aika Industry Co., Ltd., acrylic urethane coating agent) was applied at 0.2 kg / m 2 to obtain Example 1.
図２の様に目地幅１５ｍｍの既設目地部に、目地中心とし３０ｍｍの目地棒で、１０ｍｍ被覆モルタルを施しモルタル硬化後、目地棒を取り去った後は実施例１と同じに行い実施例２とした。 As shown in FIG. 2, the existing joint portion having a joint width of 15 mm was subjected to 10 mm covering mortar with a joint center of 30 mm and cured, and after removing the joint rod, the same procedure as in Example 1 was performed. did.
上記 使用のＪＢＸ−１５２の耐摩耗性はＪＩＳ Ｋ７２０４で準じ、摩耗輪Ｈ２２、荷重１ｋｇ 回転数１０００回では０．４ｇ／１０００回であった。
The wear resistance of the JBX-152 used was 0.4 g / 1000 times according to JIS K7204 when the wear wheel H22 and the
また、実施例の耐久性確認試験として、上記アクリルウレタンコート剤を塗布しないもので、シーリング処理深さ１５ｍｍ、目地幅３０ｍｍとした以外は同じ条件で試験体を作製し、−１０℃で伸縮試験を行い、伸び＋２ｍｍ、縮み−２ｍｍを５０００サイクル、更に伸び＋３ｍｍ、縮み−３ｍｍを５０００サイクル、更に伸び＋４ｍｍ、縮み−４ｍｍを５０００サイクル行ったがクラックの発生はなかった。 Moreover, as a durability confirmation test of an Example, the said acrylic urethane coating agent is not apply | coated, A test body is produced on the same conditions except having made the sealing process depth 15mm and joint width 30mm, and a stretching test at -10 degreeC. The sample was subjected to elongation +2 mm and shrinkage −2 mm for 5000 cycles, further elongation +3 mm and shrinkage −3 mm for 5000 cycles, and further elongation +4 mm and shrinkage −4 mm for 5000 cycles, but no cracks were generated.
以下に背面水圧の目地構造の有用性を示した。実験ばらつきをなくするため、８φとし、実際の目地より、破壊水圧が高くでるが、目地構造の差が現れ易い。 The usefulness of the joint structure of the back water pressure is shown below. In order to eliminate experimental variation, the diameter is set to 8φ, and the fracture water pressure is higher than the actual joint, but a difference in joint structure is likely to appear.
＜実験例１＞
図３の様に７０ｍｍ角厚さ２５ｍｍのモルタルブロックの中心に８φの穴をあけ、ジョリシールＪＢ−４０Ｐを０．１ｋｇ／ｍ２塗布し、図４の様にジョリシールＪＰ−４０を上面より４ｍｍ厚となるように充填し、実験例１とした。
<Experimental example 1>
As shown in FIG. 3, a hole of 8φ is made in the center of a mortar block having a 70 mm square and a thickness of 25 mm, and Jolliseal JB-40P is applied at 0.1 kg / m 2. As shown in FIG. The sample was filled so as to have a thickness of 4 mm.
＜実験例２＞
実験例１のジョリシールＪＰ−４０に変えて、ジョリシールＪＫ−５５（アイカ工業(株)、商品名、１成分湿気硬化型ウレタンシーリング材、５０％モジュラス０．２Ｎ／ｍｍ２、伸び８００％）にした以外同じで、実験例２とした。
<Experimental example 2>
Instead of Jolliseal JP-40 in Experimental Example 1, Jolliseal JK-55 (Aika Industry Co., Ltd., trade name, one-component moisture-curing urethane sealing material, 50% modulus 0.2 N / mm 2 , elongation 800% It was the same as that of Example 2 and was set as Experimental Example 2.
＜実験例３＞
図５の様に実験例１に更にジョリシールＪＰ−４０を穴を中心に２８ｍｍ角１ｍｍ厚となる様に塗付し、実験例３とした。
<Experimental example 3>
As shown in FIG. 5, Jolliseal JP-40 was further applied to Experimental Example 1 so as to be 28 mm square and 1 mm thick around the hole.
＜実験例４＞
図５の様に実験例２に更にジョリシールＪＫ−５５を穴を中心に２８ｍｍ角１ｍｍ厚となる様に塗付し、実験例４とした。
<Experimental example 4>
As shown in FIG. 5, Jolliseal JK-55 was further applied to Experimental Example 2 so as to be 28 mm square and 1 mm thick around the hole.
＜実験例５＞ <Experimental example 5>
図６の様に実験例１に更にジョリシールＪＢ−４０Ｐ２を０．１ｋｇ／ｍ２塗布し、ジョリシールＪＢＸ−１５２を穴を中心に２８ｍｍ角１ｍｍ厚となる様に塗付し、実験例５とした。 As shown in FIG. 6, 0.1 kg / m 2 of Joliseal JB-40P2 was further applied to Experimental Example 1, and Joliseal JBX-152 was applied so that the thickness was 28 mm × 1 mm around the hole. It was.
＜実験例６＞
図６の様に比較例１に更にジョリシールＪＢ−４０Ｐ２を０．１ｋｇ／ｍ２塗布し、ジョリシールＪＢＸ−１５２を穴を中心に２８ｍｍ角１ｍｍ厚となる様に塗付し、実験例６とした。
<Experimental example 6>
As shown in FIG. 6, 0.1 kg / m 2 of Joliseal JB-40P2 was further applied to Comparative Example 1, and Joliseal JBX-152 was applied so that the thickness was 28 mm × 1 mm around the hole. It was.
破壊水圧：
背面水圧の耐圧試験を図７に示す様に漏れのない加圧容器に水圧を掛け、破壊水圧を測定した。その際、シーリング材破壊以外のモルタル材破には破壊水圧の末尾に＊を付した。なお ２３℃７日間静置後、５０℃１日処理したものを試験体とした。
Breaking water pressure:
As shown in FIG. 7, the water pressure was applied to a pressurized container having no leakage, and the breaking water pressure was measured. At that time, * at the end of the fracture hydraulic pressure was applied to mortar fractures other than the sealant fracture. In addition, what was processed at 50
本発明の目地構造は耐摩耗性が高いウレアウレタン樹脂被覆が施され、同時に背面水圧にも寄与していることが、実験例の各比較で判る。この目地構造は正面水圧に対しては更に強く、汎用に用いられるシーリング材ＪＫ−５５でも背面水圧の向上に寄与している。背面水圧は様々な環境で、頻度は別として、耐久性に及ぼす応力履歴としてあり得るもので有用な目地構造となる。
It can be seen from the respective comparisons of the experimental examples that the joint structure of the present invention is provided with a urea urethane resin coating having high wear resistance and at the same time contributes to the back water pressure. This joint structure is stronger against the front water pressure, and the sealing material JK-55 used for general purposes also contributes to the improvement of the back water pressure. Backside water pressure is a useful joint structure that can be a history of stress on durability, aside from frequency, in various environments.
１ 水路コンクリート
２ シーリング材
３ ウレアウレタン被覆
４ モルタル被覆
５ モルタルブロック
６ 穴
７ 背面水圧加圧容器
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Cited By (8)
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| JP2011021445A (en) * | 2009-07-21 | 2011-02-03 | Aica Kogyo Co Ltd | Joint structure |
| WO2011058836A1 (en) | 2009-11-10 | 2011-05-19 | 日本電気株式会社 | Fake-finger determination device, fake-finger determination method and fake-finger determination program |
| JP2011173939A (en) * | 2010-02-23 | 2011-09-08 | Aica Kogyo Co Ltd | Resin composition |
| JP2013159361A (en) * | 2012-02-03 | 2013-08-19 | Shimizu Corp | Liquid stopping bank, and structure |
| CN105378184A (en) * | 2013-06-28 | 2016-03-02 | 路化有限公司 | Method for repairing damaged part of expansion joint for concrete road |
| CN108221866A (en) * | 2018-01-23 | 2018-06-29 | 中国水利水电科学研究院 | Severe cold area slab joint surface layer, which is put down, covers type flexibility water sealing structure and installation method |
| JP2019060169A (en) * | 2017-09-27 | 2019-04-18 | Dic株式会社 | Method for sealing concrete structure |
| JP7461142B2 (en) | 2019-12-26 | 2024-04-03 | 株式会社デンソー | Concrete floor joint structure |
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| CN106759968A (en) * | 2017-01-19 | 2017-05-31 | 中国水利水电第八工程局有限公司 | A kind of processing method of prefabricated component wallboard seam |
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| WO2011058836A1 (en) | 2009-11-10 | 2011-05-19 | 日本電気株式会社 | Fake-finger determination device, fake-finger determination method and fake-finger determination program |
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| JP2019060169A (en) * | 2017-09-27 | 2019-04-18 | Dic株式会社 | Method for sealing concrete structure |
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| CN108221866A (en) * | 2018-01-23 | 2018-06-29 | 中国水利水电科学研究院 | Severe cold area slab joint surface layer, which is put down, covers type flexibility water sealing structure and installation method |
| CN108221866B (en) * | 2018-01-23 | 2023-11-17 | 中国水利水电科学研究院 | Panel joint surface layer flat-covering type flexible water stop structure in severe cold region and mounting method |
| JP7461142B2 (en) | 2019-12-26 | 2024-04-03 | 株式会社デンソー | Concrete floor joint structure |
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