JP2011080275A - Concrete slab waterproofing construction method - Google Patents
Concrete slab waterproofing construction method Download PDFInfo
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- JP2011080275A JP2011080275A JP2009233924A JP2009233924A JP2011080275A JP 2011080275 A JP2011080275 A JP 2011080275A JP 2009233924 A JP2009233924 A JP 2009233924A JP 2009233924 A JP2009233924 A JP 2009233924A JP 2011080275 A JP2011080275 A JP 2011080275A
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- 238000004078 waterproofing Methods 0.000 title claims abstract description 82
- 239000004567 concrete Substances 0.000 title claims abstract description 57
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000010426 asphalt Substances 0.000 claims abstract description 61
- 239000011342 resin composition Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 34
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 69
- 238000000034 method Methods 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- 229910052956 cinnabar Inorganic materials 0.000 description 15
- 238000011156 evaluation Methods 0.000 description 15
- 239000000853 adhesive Substances 0.000 description 14
- 230000001070 adhesive effect Effects 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000005060 rubber Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
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- 239000004744 fabric Substances 0.000 description 3
- 238000009408 flooring Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007850 fluorescent dye Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 238000012790 confirmation Methods 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
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- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Description
本発明は道路橋の鉄筋コンクリート床版の損傷、劣化を防ぐ目的で採用されているコンクリート床版防水に関するものである。 The present invention relates to a concrete slab waterproofing employed for the purpose of preventing damage and deterioration of a reinforced concrete slab of a road bridge.
道路橋の鉄筋コンクリート床版は他のコンクリート構造物と比較して部材厚が薄く且つ直接交通荷重を絶え間なく受ける等、非常に厳しい条件下に晒されている。近年、実際の交通を再現する耐久性能評価試験装置が考案され、様々な条件下での劣化メカニズムが明らかになって来た。その中で、湿潤状態にある床版は乾燥状態と比較し、その疲労寿命が１／１００まで短くなる事が指摘されおり（非特許文献１参照）、水の存在がコンクリート床版の劣化を著しく促進することが明らかとなってきた。重要な社会資本の一つである道路橋の損傷に伴う補修や打ち替えはそれに掛かる費用のみでなく、社会に与える影響が大きいため、損傷を防ぐための維持・管理手法、即ち予防保全手法が注目されているなか、様々なコンクリート床版の防水手法が検討されている。 Reinforced concrete slabs of road bridges are exposed to extremely strict conditions such as being thinner than other concrete structures and being constantly subject to direct traffic loads. In recent years, a durability performance evaluation test device that reproduces actual traffic has been devised, and the deterioration mechanism under various conditions has become clear. Among them, it has been pointed out that the fatigue life of the floor slab in a wet state is shortened to 1/100 compared to the dry state (see Non-Patent Document 1), and the presence of water causes deterioration of the concrete floor slab. It has been shown that it significantly promotes. Repair and replacement due to damage to a road bridge, one of the important social capitals, not only costs it, but also has a large impact on society, so there are maintenance and management methods to prevent damage, that is, preventive maintenance methods. Various attentions are being paid to waterproofing concrete floor slabs.
一般的にコンクリート床版防水に用いられている防水材は、シート防水材、舗装系防水材、塗膜系防水材に分類できる。 Waterproofing materials generally used for waterproofing concrete floor slabs can be classified into sheet waterproofing materials, pavement waterproofing materials, and paint film waterproofing materials.
シート系防水層としては、合成繊維やガラス繊維からなる不織布や織布に特殊アスファルトを含浸させて成型した厚さ １．５〜４ｍｍ程度の防水シートを、加熱溶融したアスファルトを流し込みながら床版に貼り付ける物、プライマーを塗布後に常温で貼り付ける物や、シートを加熱して粘着力を付与して張り付ける物がある。 As a sheet-based waterproof layer, a non-woven fabric or woven fabric made of synthetic fiber or glass fiber is impregnated with special asphalt and molded into a floor slab while pouring heated and melted asphalt. There are an object to be pasted, an object to be pasted at room temperature after the primer is applied, and an object to be pasted by heating the sheet to give an adhesive force.
舗装系防水材としては、硬質アスファルトに骨材と石粉を混ぜた物がある。又、塗膜系防水層としては、合成ゴム塗膜系防水層、アスファルト塗膜系防水層、エポキシ樹脂塗膜系防水層がある。その中で、シート系防水材は防水の確実性が高い事や床版やアスファルト合材双方への接着性が良い事、床版のクラックに対する追従性が高いという特徴を持っており、床版防水に広く使われる優れた防水材である。 As a pavement waterproofing material, there is a mixture of hard asphalt and aggregate and stone powder. Further, examples of the coating-type waterproof layer include a synthetic rubber coating-type waterproof layer, an asphalt coating-type waterproof layer, and an epoxy resin coating-type waterproof layer. Among them, sheet-based waterproofing materials are characterized by high reliability of waterproofing, good adhesion to both floor slabs and asphalt composites, and the ability to follow cracks in floor slabs. It is an excellent waterproof material widely used for waterproofing.
しかしながら、シート系防水材には防水層やアスファルト舗装が膨れる「ブリスタリング現象」が発生するという問題点があった。シート防水材に発生する「ブリスタリング現象」は、シートに穴を開け、膨れをつぶしてパッチを当てる等の補修をおこなうのが一般的である。防水を目的としたシートに穴を開けるため、確実な防水性能が期待出来ない事や膨れ一か所毎に補修を行う必要があり手間が掛かる事等の課題があった。 However, the sheet-based waterproof material has a problem that a “blistering phenomenon” occurs in which a waterproof layer and asphalt pavement swell. The “blistering phenomenon” that occurs in a sheet waterproofing material is generally repaired by making a hole in the sheet, crushing the blister, and applying a patch. Since a hole was made in a sheet for waterproofing, there were problems that reliable waterproof performance could not be expected and that it was necessary to repair each swelled place, which was troublesome.
又、舗装した後に発生する「ブリスタリング」は舗装が部分的にはがれる「ポットホール」を引き起こし重大な事故につながる可能性があるため、改良が求められていた。 In addition, “blistering” that occurs after paving may cause a “pothole” in which the pavement is partially peeled off, leading to a serious accident.
本発明は、アスファルト系シート防水材のブリスタリング防止技術に関する。 The present invention relates to a blistering prevention technique for an asphalt sheet waterproofing material.
シート系防水材に発生するブリスタリング現象は、１）施工時に床版表面の水分を完全に除去できなかった、２）床版の含有水分が多い状態で施工を行った、３）高温多湿条件で施工を行った、等の原因により、床版とシート防水材の間に水蒸気が溜まりシート防水材や舗装に膨れを生じさせる現象である。 The blistering phenomenon that occurs in sheet-based waterproofing materials is that 1) the moisture on the floor slab surface could not be completely removed during construction, 2) the construction was carried out with a high moisture content in the floor slab, and 3) high temperature and high humidity conditions. This is a phenomenon in which water vapor accumulates between the floor slab and the sheet waterproofing material and causes the sheet waterproofing material and pavement to swell due to reasons such as the construction of the sheet waterproofing.
本現象の対策は床版からの水蒸気透過を防止する事が最も有効である。 The most effective countermeasure for this phenomenon is to prevent water vapor permeation from the floor slab.
既に本発明者は特許文献１〜３でアクリル系ラジカル硬化性液状樹脂組成物単独又は加熱塗布型アスファルト防水材と組み合わせることで、防水性だけではなく床版のクラック補修を同時に行い床版の疲労耐久性を向上させる事ができる優れた床版防水材を提案している。 Already, the present inventors have disclosed in Patent Documents 1 to 3 that an acrylic radical curable liquid resin composition alone or in combination with a heat-applied asphalt waterproofing material not only waterproofs but also repairs cracks in the floor slab at the same time. We have proposed excellent floor slab waterproofing materials that can improve durability.
即ち、本発明は従来のアスファルト系プライマーの代わりにアクリル型ラジカル硬化性液状樹脂組成物を使用する事により、今までアスファルト系シート防水材で課題であったブリスタリングを防ぐ事を目的としている。 That is, the present invention aims to prevent blistering, which has been a problem with conventional asphalt sheet waterproofing materials, by using an acrylic radical curable liquid resin composition instead of a conventional asphalt primer.
即ち、本発明は、コンクリート床版表面に塗布した後硬化することにより床版と一体化した防水層を形成するアクリル系ラジカル硬化性液状樹脂組成物の上に、アスファルト系シート防水材を施工してなることを特徴とするコンクリート床版防水工法であり、コンクリート床版表面に塗布した後硬化することにより床版と一体化した防水層を形成するアクリル系ラジカル硬化性液状樹脂組成物の上に、珪砂を散布し、更にその上にアスファルト系シート防水材を施工してなることを特徴とするコンクリート床版防水工法であり、アスファルト系シート防水材の上に、アスファルト混合物を舗設することを特徴とする該コンクリート床版防水工法であり、前記アクリル系ラジカル硬化性樹脂組成物の塗布時の粘度が２０００ｍＰａ・ｓ以下であり且つ、塗布量が５０ｇ／ｍ2以上１２００ｇ／ｍ2以下であることを特徴とする該コンクリート床版防水工法であり、前記アクリル系ラジカル硬化性液状樹脂組成物がＪＩＳ Ａ １１０６．３（供試体）により作製した１００ｍｍ×１００ｍｍ×４００ｍｍのコンクリートブロックの中央部付近に曲げ荷重を加え２片に破断した後、その２片の破断面を０．２ｍｍの間隔をあけて突き合わせ対向させた状態で固定することにより試験片を作製し、水平方向に維持し、該ラジカル硬化性樹脂組成物を試験片上面に２００ｇ／ｍ2塗布した際に、該ラジカル硬化性樹脂組成物がひび割れに含浸硬化してコンクリートを一体化する深さが１０ｍｍ以上であることを特徴とする該コンクリート床版防水施工方法であり、前記アクリル系ラジカル硬化性樹脂組成物が（メタ）アクリル系樹脂を含有する液状樹脂組成物であることを特徴とする該コンクリート床版防水施工方法であり、該床版防水施工方法で施工されたコンクリート床版防水構造体である。 That is, the present invention applies an asphalt sheet waterproofing material on an acrylic radical curable liquid resin composition that forms a waterproof layer integrated with the floor slab by being applied to a concrete floor slab surface and then cured. A concrete floor slab waterproofing method characterized in that it is formed on an acrylic radical-curable liquid resin composition that forms a waterproof layer integrated with the floor slab by being applied to the concrete floor slab surface and then cured. It is a concrete floor slab waterproofing method characterized by spraying silica sand and then applying asphalt sheet waterproofing material on it, characterized by paving asphalt mixture on asphalt sheet waterproofing material The concrete floor slab waterproofing method, wherein the viscosity at the time of application of the acrylic radical curable resin composition is 2000 mPa · s or less And a said concrete slab waterproofing construction method, wherein the coating amount is 50 g / m 2 or more 1200 g / m 2 or less, the acrylic radical-curable liquid resin composition is JIS A 1106.3 (specimen ), A bending load is applied to the vicinity of the central part of the concrete block of 100 mm × 100 mm × 400 mm prepared in the above to break it into two pieces, and then the two broken surfaces are fixed in a state where they face each other with a gap of 0.2 mm. The test piece was prepared and maintained in the horizontal direction, and when the radical curable resin composition was applied to the top surface of the test piece at 200 g / m 2 , the radical curable resin composition was impregnated and cured into cracks. The concrete floor slab waterproofing construction method characterized in that the depth of integrating the concrete is 10 mm or more, the acrylic radical curable resin The concrete floor slab waterproofing construction method, wherein the composition is a liquid resin composition containing a (meth) acrylic resin, and the concrete floor slab waterproofing structure constructed by the floor slab waterproofing construction method is there.
本発明によれば、ブリスタリングの発生を防ぐ床版防水構造体を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the floor slab waterproofing structure which prevents generation | occurrence | production of blistering can be provided.
コンクリート床版は、例えば、以下のように形成する。鋼道路橋を建設する場合、予め主桁を有する橋梁骨組を建設後、この主桁上に型枠を配置し、この型枠内に上下に夫々主筋及び配力筋を配置した後、この型枠内にコンクリートを打設、硬化し、連続したコンクリート床版を形成させる。 The concrete floor slab is formed as follows, for example. When constructing a steel road bridge, after constructing a bridge frame with a main girder in advance, place a formwork on the main girder, and place the main and distribution bars up and down in the formwork. Concrete is placed in the frame and hardened to form a continuous concrete floor slab.
前記アクリル系ラジカル硬化性液状樹脂組成物としては、（メタ）アクリル酸エステルモノマー、ウレタン（メタ）アクリレートやエポキシ（メタ）アクリレート等の（メタ）アクリルオリゴマーを含有する常温硬化型の(メタ)アクリル樹脂組成物が挙げられるが、これらに限定されるものではない。 The acrylic radical curable liquid resin composition includes a (meth) acrylic acid ester monomer, a (meth) acrylic (meth) acrylic resin containing a (meth) acrylic oligomer such as urethane (meth) acrylate and epoxy (meth) acrylate. Although a resin composition is mentioned, it is not limited to these.
本発明に係るアクリル系ラジカル硬化性液状樹脂組成物としては、「ハードロックＩＩ デッキコートＮ」（電気化学工業社製アクリル樹脂），「ハードロックＩＩ ＤＫ ５５０−００３」（電気化学工業社製アクリル樹脂）等が挙げられるが、本発明はこれらに限定されるものではない。 Examples of the acrylic radical curable liquid resin composition according to the present invention include “Hard Rock II Deck Coat N” (acrylic resin manufactured by Denki Kagaku Kogyo), “Hard Rock II DK 550-003” (acrylic manufactured by Denki Kagaku Kogyo Co., Ltd.). Resin) and the like, but the present invention is not limited to these.
本発明では、アクリル系ラジカル硬化性液状樹脂組成物として、塗布時の粘度が２０００ｍＰａ・ｓ以下の物を使用する。該ラジカル硬化性液状樹脂組成物の塗布時の粘度が２０００ｍＰａ・ｓ以下だと、コンクリート床版への含浸性が良くなり、床版に含浸し、表層と一体化した水蒸気不透過層の形成が確保できると同時に、ピンホール等の欠陥が発生しにくくなる。塗布時の粘度は、１０００ ｍＰａ・ｓ以下がより好ましい。 In the present invention, an acrylic radical curable liquid resin composition having a viscosity of 2000 mPa · s or less during coating is used. When the viscosity at the time of application of the radical curable liquid resin composition is 2000 mPa · s or less, the impregnation property to the concrete slab is improved, and the formation of a water vapor impermeable layer integrated with the surface slab is integrated. At the same time, defects such as pinholes are less likely to occur. The viscosity at the time of application is more preferably 1000 mPa · s or less.
前記アクリル系ラジカル硬化性液状樹脂組成物の粘度はＪＩＳ Ｋ６８３３の６．３（粘度）に規定されている方法で測定した粘度をいう。この粘度の調整は例えばラジカル硬化性液状組成物中の（メタ）アクリル酸エステルモノマー含有量や一般的な増粘剤の添加により調整する事ができる。 The viscosity of the acrylic radical curable liquid resin composition is a viscosity measured by a method defined in 6.3 (viscosity) of JIS K6833. This viscosity can be adjusted, for example, by adding a (meth) acrylic acid ester monomer content in a radically curable liquid composition or a general thickener.
本発明のアクリル系ラジカル硬化性液状樹脂組成物は、アスファルト系シート防水材のプライマーとして、コンクリートに含浸して床版と一体化する事で水蒸気不透過層を形成する。 The acrylic radical curable liquid resin composition of the present invention forms a water vapor impermeable layer by impregnating concrete as a primer for an asphalt sheet waterproofing material and integrating with a floor slab.
該アクリル系ラジカル硬化性液状樹脂組成物の塗布量は５０ｇ／ｍ2以上が好ましく、１００ｇ／ｍ2以上がより好ましい。該アクリル系ラジカル硬化性液状樹脂組成物の塗布量は１２００ｇ／ｍ2以下が好ましく、１０００ｇ／ｍ2以下がより好ましく、６００ｇ／ｍ2以下が最も好ましい。塗布量が５０ｇ／ｍ2以上だと、床版と一体化する水蒸気不透過層が厚さを確保し、満足できるブリスタリング抑制効果が発現する。一方、塗布量が１２００ｇ／ｍ2以下だと、経済的である。尚、前記アクリル系ラジカル硬化性液状樹脂組成物にブリスタリングの原因となる床版からの水蒸気を制御するため、粒子状や繊維状、層状のフィラーを配合する事もできる。 The coating amount of the acrylic radical curable liquid resin composition is preferably 50 g / m 2 or more, and more preferably 100 g / m 2 or more. The coating amount of the acrylic radical-curable liquid resin composition is preferably from 1200 g / m 2 or less, more preferably 1000 g / m 2 or less, 600 g / m 2 or less is most preferred. When the coating amount is 50 g / m 2 or more, the water vapor impermeable layer integrated with the floor slab secures the thickness, and a satisfactory blistering suppressing effect is exhibited. On the other hand, if the coating amount is 1200 g / m 2 or less, it is economical. In addition, in order to control the water vapor from the floor slab which causes blistering to the acrylic radical curable liquid resin composition, particulate, fibrous or layered fillers can be blended.
前記アクリル系ラジカル硬化性液状樹脂組成粒の塗布方法については特に制限が無く、一般的に採用されているローラー、コテ、刷毛による塗布や、エアー吹き付け機やエアレス吹き付け機による吹き付け等、適宜施工する場所や施工時間、交通規制等の条件により選択することができる。又、塗布回数も特に制限なく、所定量を一度で塗布する方法や複数回に分けて重ね塗りする方法等自由に選択できる。 The application method of the acrylic radical curable liquid resin composition particles is not particularly limited, and is appropriately applied, such as application by a commonly employed roller, iron, or brush, or spraying by an air sprayer or an airless sprayer. It can be selected according to conditions such as location, construction time, and traffic regulations. Further, the number of times of application is not particularly limited, and a method of applying a predetermined amount at a time or a method of repeatedly applying a plurality of times can be selected freely.
未硬化のラジカル硬化性液状樹脂組成物の塗布方法は特に制限は無いが、ローラー、コテ、吹き付け方法等が挙げられる。 The application method of the uncured radically curable liquid resin composition is not particularly limited, and examples thereof include a roller, a trowel, and a spraying method.
前記アクリル系ラジカル硬化性液状樹脂組成物の硬化時間は特に制限は無いが、施工に裂ける時間や施工面積、施工方法によって適宜調整する事ができる。 The curing time of the acrylic radical curable liquid resin composition is not particularly limited, but can be appropriately adjusted according to the time required for construction, the construction area, and the construction method.
前記アクリル系ラジカル硬化性液状樹脂組成物がＪＩＳ Ａ １１０６．３ (供試体)により作製した１００ｍｍ×１００ｍｍ×４００ｍｍのコンクリートブロックの中央部付近に曲げ荷重を加え２片に破断した後、その２片の破断面を０．２ｍｍの間隔をあけて突き合わせ対向させた状態で固定することにより試験片を作製し、水平方向に維持し、該アクリル系ラジカル硬化性樹脂組成物を試験片上面に２００ｇ／ｍ2塗布した際に、該ラジカル硬化性樹脂組成物がひび割れに含浸硬化してコンクリートを一体化する深さが１０ｍｍ以上であるクラック含浸性に優れた物が好ましい。該ラジカル硬化性液状樹脂組成物の上記クラック浸透性が好ましくは１０ｍｍ以上、より好ましくは２０ｍｍ以上であれば、細かいクラックに充分深く浸透して一体化する事で水蒸気透過量を抑制する事ができ、ブリスタリングを防ぐ事が可能となる。 After the acrylic radical curable liquid resin composition was broken into two pieces by applying a bending load near the center of a 100 mm × 100 mm × 400 mm concrete block prepared according to JIS A 1106.3 (specimen), the two pieces A test piece is prepared by fixing the fractured surface of the test piece in a state of being opposed to each other with an interval of 0.2 mm, and maintained in a horizontal direction. The acrylic radical curable resin composition is 200 g / When m 2 is applied, it is preferable that the radical curable resin composition is impregnated and hardened into cracks and has a depth of 10 mm or more in which the concrete is integrated and has excellent crack impregnation properties. If the above-mentioned crack permeability of the radical curable liquid resin composition is preferably 10 mm or more, more preferably 20 mm or more, the penetration of water vapor can be suppressed by sufficiently deeply penetrating and integrating fine cracks. It is possible to prevent blistering.
本発明に用いるアスファルト系シート防水材としては、社団法人日本道路協会が編集した「道路橋床版防水便覧」の中に規定されている基本性能照査のための試験を満足するもので、且つ、床版防水層を構成する材料の標準的品質の例を満足するものであれば使用することが出来る。例えば、防水シートをコンクリート床版に貼り付ける際に、加熱溶融した貼付用アスファルトを流し込む流し貼り型シート、貼り付け用の加熱溶融アスファルトが塗布されたシートをバーナーや電熱で溶融させて床版に貼り付ける加熱溶融型シート、常温で粘着性のある貼り付け用アスファルトを塗布したシートを床版に圧着する常温粘着型シート等が挙げられる。これらの中では、コンクリート床版との密着性が安定する点で、加熱アスファルトによる流し貼り型シートがより好ましい。 Asphalt-based sheet waterproofing material used in the present invention, which satisfies the test for basic performance check specified in the "Road Bridge Floor Waterproofing Handbook" edited by the Japan Road Association, and Any material that satisfies the standard quality example of the material constituting the floor slab waterproof layer can be used. For example, when affixing a waterproof sheet to a concrete floor slab, a flow paste sheet for pouring heated and melted asphalt, or a sheet coated with a heat melt asphalt for pasting is melted with a burner or electric heat to form a floor slab. Examples thereof include a heat-melting type sheet to be pasted and a room-temperature pressure-sensitive adhesive sheet in which a sheet coated with sticking asphalt that is sticky at room temperature is pressure-bonded to a floor slab. Among these, a flow pasting type sheet using heated asphalt is more preferable in that the adhesion to the concrete floor slab is stabilized.
本発明では、アクリル系ラジカル硬化性液状組成物をコンクリート床版に塗布した後に、接着面積を広げてアスファルト系シート防水材との密着力を安定化する目的で、硅砂を散布することができる。 In the present invention, after applying the acrylic radical curable liquid composition to the concrete floor slab, dredged sand can be sprayed for the purpose of expanding the adhesion area and stabilizing the adhesion with the asphalt sheet waterproofing material.
前記硅砂として、天然にて石英砂の状態で存在する物を採取し、水洗・乾燥篩い分けした天然硅砂、岩石状硅砂を人工的に粉砕し篩い分けした人造硅砂や、ガラス粉砕品等を使うことができるが、コストや入手し易さを基準に選定することができる。しかし、散布時の飛散を防ぐため、予めメーカーで篩い分けして製品化している物を使う事が好ましい。具体的には、粒子径が２．４ｍｍ〜１．２ｍｍ（８メッシュ〜１８メッシュ）である３号硅砂、粒子径が１．２ｍｍ〜０．６ｍｍ（１０メッシュ〜２３メッシュ）である４号硅砂や、粒子径が０．８ｍｍ〜０．３ｍｍ（１８メッシュ〜５０メッシュ）である５号硅砂が散布時の飛散が少なく、好ましい。これらの硅砂は各々単独又は２種以上を組み合わせて使用する事ができる。 As the above-mentioned dredged sand, natural sand that is in the form of quartz sand is collected, washed with water and dried and sifted, artificial dredged sand that is artificially ground and screened with rock-shaped dredged sand, and crushed glass are used. However, it can be selected based on cost and availability. However, in order to prevent scattering at the time of spraying, it is preferable to use a product that has been pre-screened by a manufacturer and commercialized. Specifically, No. 3 cinnabar having a particle diameter of 2.4 mm to 1.2 mm (8 mesh to 18 mesh), No. 4 cinnabar having a particle diameter of 1.2 mm to 0.6 mm (10 mesh to 23 mesh). Moreover, No. 5 cinnabar having a particle diameter of 0.8 mm to 0.3 mm (18 mesh to 50 mesh) is preferable because of less scattering when sprayed. These cinnabar sands can be used alone or in combination of two or more.
硅砂の散布量は使用する粒度や散布する床版の不陸の程度により異なるが、１．５Ｋｇ／ｍ2を超えない範囲で散布することができる。１．５Ｋｇ／ｍ2以下であればアスファルト系シート防水材との間の密着力が著しく低下することはない。硅砂の散布量は、０．５Ｋｇ／ｍ2以上、１．０Ｋｇ／ｍ2以下がより好ましい。又、硅砂を散布するタイミングはアクリル系ラジカル硬化性樹脂組成物が硬化するまでに散布する事が出来るが、アクリル系ラジカル硬化性樹脂組成物を塗付した直後が好ましい。 The amount of dredged sand varies depending on the particle size used and the degree of unevenness of the floor slab to be spread, but can be spread within a range not exceeding 1.5 kg / m 2 . If it is 1.5 Kg / m < 2 > or less, the adhesive force between asphalt-based sheet waterproofing materials will not be significantly reduced. The amount of dredged sand is more preferably 0.5 kg / m 2 or more and 1.0 kg / m 2 or less. Moreover, although the timing at which the cinnabar is sprayed can be sprayed before the acrylic radical curable resin composition is cured, it is preferably immediately after the acrylic radical curable resin composition is applied.
本発明は、アスファルト系シート防水材の上に、アスファルト混合物を舗設することができる。アスファルト混合物は、骨材とアスファルトを含有する混合物である。骨材の最大粒径は、５〜１３ｍｍが好ましい。アスファルト混合物の厚さは７０ｍｍ以下が好ましい。 In the present invention, an asphalt mixture can be paved on an asphalt sheet waterproofing material. An asphalt mixture is a mixture containing aggregate and asphalt. The maximum particle size of the aggregate is preferably 5 to 13 mm. The thickness of the asphalt mixture is preferably 70 mm or less.
実施例により本発明をより具体的に説明する。 The present invention will be described more specifically with reference to examples.
（実施例１）
本実施例では、ラジカル硬化型樹脂組成物として、電気化学工業製アクリル系含浸接着剤「デッキコートＮ」を２０℃の恒温室の中で使用した。「デッキコートＮ」の２０℃における粘度は１８０ｍＰａ・ｓである。「デッキコートＮ」は、２０℃の雰囲気で硬化時間を約３０分に調整した物を使用した。
試験体として表面をブラスト処理して表面のレイタンスを除去した３０ｃｍ×３０ｃｍ×６ｃｍのコンクリート平板を３枚用意し、それぞれブリスタリング評価、引張接着試験と剪断接着試験に使用した。ブリスタリング試験はブリスタリングの原因となる蒸気が側面から逃げない様に予め試験体の表面と底面を残してエポキシ樹脂でシールを行い、２０℃の水中に２４時間以上試験体を全面水浸した供試体を使用した。「デッキコートＮ」を塗布する直前に水中から取り出して表面の水分をウエス等で拭き取り、「デッキコートＮ」を２００ｇ／ｍ2の割合でゴムベラを使用して塗布し、直に４号硅砂を０．７Ｋｇ／ｍ2となるよう手で均一に撒布した。３０分放置して硬化させた後、ニチレキ製シート防水材貼り付け用アスファルトコンパウンド「ガムファルトＢ」を加熱溶解し、試験体表面に １．２Ｋｇ/ｍ2 になる様流し込ながら、同時にニチレキ社製アスファルト系シート防水材「ラバソイドＩＩ」を貼り付けた。「ラバソイドＩＩ」は、流し貼り型のアスファルト系シート防水材である。
Example 1
In this example, an acrylic impregnated adhesive “Deck Coat N” manufactured by Denki Kagaku Kogyo was used as a radical curable resin composition in a thermostatic chamber at 20 ° C. The viscosity of “Deck Coat N” at 20 ° C. is 180 mPa · s. For “Deck Coat N”, a material whose curing time was adjusted to about 30 minutes in an atmosphere of 20 ° C. was used.
Three 30 cm × 30 cm × 6 cm concrete plates from which the surface was blasted to remove the surface latency were prepared as test specimens and used for blistering evaluation, tensile adhesion test and shear adhesion test, respectively. In the blistering test, in order to prevent the vapor that causes blistering from escaping from the side, the specimen is sealed with epoxy resin in advance leaving the surface and bottom of the specimen, and the specimen is fully immersed in water at 20 ° C for 24 hours or more. A specimen was used. Immediately before applying “Deck Coat N”, remove it from the water, wipe off the surface moisture with a waste cloth, etc., apply “Deck Coat N” at a rate of 200 g / m 2 using a rubber spatula, and directly apply No. 4 cinnabar sand. It was uniformly spread by hand so as to be 0.7 kg / m 2 . After leaving for 30 minutes to cure, asphalt compound “Gumphalt B” for attaching Nichireki sheet waterproofing material is heated and dissolved, and poured into the surface of the test specimen to 1.2 kg / m 2 , simultaneously made by Nichireki Asphalt-based sheet waterproofing material “Rabasoid II” was pasted. “Rabasoid II” is an asphalt-based sheet waterproofing material that is attached to the sink.
次に、この供試体を金属製のバットに移して表面から１ｃｍ下まで６０℃の温水を注ぎ、直ちに６０℃に調整した恒温槽に入れて２４時間放置し、ブリスタリングの数を目視により計数した。 Next, this specimen was transferred to a metal bat, poured with hot water of 60 ° C. from the surface to 1 cm below, immediately placed in a thermostat adjusted to 60 ° C. and left for 24 hours, and the number of blistering was visually counted. did.
引張試験、剪断試験用供試体もブリスタリング試験と同様、試験体にデッキコートＮを２００ｇ／ｍ2の割合でゴムベラを使用して塗布し、直に４号硅砂を０．７Ｋｇ／ｍ2となるよう手で均一に撒布した。３０分以上放置し、硬化判断のため指触により４号硅砂の固着を確認した後、ニチレキ社製シート防水材貼り付け用アスファルトコンパウンド「ガムファルトＢ」を加熱溶解し、試験体表面に １．２Ｋｇ／ｍ2 になる様流し込ながら、同時にアスファルト系シート防水材「ラバソイドＩＩ」を貼り付けた。次に、最大粒径１３ｍｍの骨材と改質ＩＩ型アスファルトを含有した密粒アスファルト混合物を厚さ４ｃｍになるよう計量して線圧３０Ｋｇ／ｃｍに調整したコンパクターにより舗設した。 As with the blistering test, the specimen for tensile test and shear test was coated with Deck Coat N at a rate of 200 g / m 2 using a rubber spatula, and directly No. 4 cinnabar was 0.7 kg / m 2 . It was distributed evenly by hand. After standing for 30 minutes or more and confirming the fixation of No. 4 cinnabar sand by finger touch for hardening judgment, asphalt compound “Gumphalt B” for attaching sheet waterproofing material manufactured by Nichireki is heated and dissolved, and 1.2 kg Asphalt-based sheet waterproofing material “Rabasoid II” was attached at the same time while pouring so as to be / m 2 . Next, a dense asphalt mixture containing aggregate with a maximum particle size of 13 mm and modified type II asphalt was weighed to a thickness of 4 cm and paved with a compactor adjusted to a linear pressure of 30 kg / cm.
引張接着試験は「道路橋床版防水便覧」の付録−１試験方法の中に規定されている方法に準拠して行った。具体的には、コアカッターにより試験体に直径１０ｃｍの切れ込みをコンクリート板に達するまで入れ、直径１０ｃｍの鉄製治具を接着剤で接着し、２０℃の恒温槽に６時間以上静置した後、建研式引張試験機により測定を行った。引張接着試験は３回実施しその平均値を引張接着強度とした。接着剤としてコニシ社製「クイックメンダー」（主成分エポキシ樹脂）を使用した。 The tensile adhesion test was performed in accordance with the method specified in Appendix-1 Test Method of “Road Bridge Floor Waterproof Guide”. Specifically, a 10 cm diameter notch is put into the test body with a core cutter until the concrete plate is reached, an iron jig with a diameter of 10 cm is bonded with an adhesive, and left in a constant temperature bath at 20 ° C. for 6 hours or more. Measurement was performed by a Kenken type tensile tester. The tensile adhesion test was carried out three times, and the average value was defined as the tensile adhesion strength. “Quick Mender” (main component epoxy resin) manufactured by Konishi Co., Ltd. was used as an adhesive.
剪断接着試験も「道路橋床版防水便覧」の付録−１試験方法の中に規定されている方法に準拠して行った。具体的には、コンクリートカッターにより供試体の端４面を幅５ｃｍずつ切り落とし、残った部分から１０ｃｍ×１０ｃｍの供試体を４個作成した。これらの供試体を２０℃の恒温槽で６時間以上静置した後、剪断試験用治具を用いて剪断接着強度を測定した。尚、剪断試験も３回実施し、その平均値を剪断接着強度とした。 The shear adhesion test was also carried out in accordance with the method specified in Appendix-1 Test Method of “Road Bridge Flooring Waterproof Handbook”. Specifically, the end 4 surfaces of the specimen were cut off by a width of 5 cm with a concrete cutter, and four specimens of 10 cm × 10 cm were created from the remaining portions. These specimens were allowed to stand in a constant temperature bath at 20 ° C. for 6 hours or longer, and then shear adhesive strength was measured using a shear test jig. The shear test was also performed three times, and the average value was defined as the shear bond strength.
（実施例２）
本実施例では、ラジカル硬化型樹脂組成物として同じく電気化学工業製アクリル系含浸接着剤「ＤＫ ５５０−００３」を実施例１と同じく ２０℃の恒温室の中で調整したものを使用した。「ＤＫ ５５０−００３」の２０℃における粘度は３００ｍＰａ・ｓである。
試験体は実施例１と同様にブラスト処理して表面のレイタンスを除去した３０ｃｍ×３０ｃｍ×６ｃｍのコンクリート平板を５枚用意し、実施例１と同様にその中の３枚をブリスタリング評価に、１枚を引張接着試験、残りの１枚を剪断接着試験に使用した。
ブリスタリング評価は実施例１と同様周囲をエポキシ樹脂でシールした後、２０℃の水中に２４時間以上完全水浸してＤＫ５５０−００３を塗布する直前に水槽から取り出してウエス等で表面の水分を拭き取ったものを使用した。
ＤＫ５５０−００３は１回目に約５００ｇ／ｍ2塗布して硬化させた後、更に合計９００ｇ／ｍ2になる様ゴムベラを用いて２回目の塗布をした。２回目の塗布直後、４号硅砂を１．０Ｋｇ／ｍ2となるよう手で撒布した。
(Example 2)
In this example, an acrylic impregnated adhesive “DK 550-003” manufactured by Denki Kagaku Kogyo Co., Ltd. prepared in a thermostatic chamber at 20 ° C. was used as in Example 1 as the radical curable resin composition. The viscosity of “DK 550-003” at 20 ° C. is 300 mPa · s.
Test specimens were prepared by blasting in the same manner as in Example 1 to prepare 5 sheets of 30 cm × 30 cm × 6 cm concrete plates from which surface latency was removed, and in the same manner as in Example 1, three of them were subjected to blistering evaluation. One sheet was used for the tensile adhesion test and the other sheet was used for the shear adhesion test.
In the blistering evaluation, the periphery was sealed with an epoxy resin in the same manner as in Example 1, and then completely immersed in water at 20 ° C. for 24 hours or more and taken out from the water tank immediately before applying DK550-003, and the surface moisture was wiped off with a waste cloth or the like. I used something.
DK550-003 was applied for the first time at about 500 g / m 2 and cured, and then applied a second time using rubber spatula so that the total amount was 900 g / m 2 . Immediately after the second application, No. 4 cinnabar was spread by hand so as to be 1.0 kg / m 2 .
硬化判断のため指触により４号硅砂の固着を確認した後、実施例１と同様にシート防水材貼り付け用アスファルトコンパウンド「ガムファルトＢ」を加熱溶解し、試験体表面に １．２Ｋｇ／ｍ2 になる様流し込ながら、同時にアスファルト系シート防水材「ラバソイドＩＩ」を貼り付けた。次に金属製のバットに移し、表面から１ｃｍ下まで６０℃の温水を注ぎ、６０℃に調整した恒温槽に入れて２４時間放置し、ブリスタリングの発生を観察した。 After confirming the fixation of No. 4 cinnabar by finger touch for curing determination, asphalt compound “Gumfalt B” for attaching sheet waterproofing material was heated and dissolved in the same manner as in Example 1 and 1.2 kg / m 2 on the surface of the test specimen. At the same time, asphalt sheet waterproofing material “Rabasoid II” was pasted. Next, it was transferred to a metal bat, hot water at 60 ° C. was poured from the surface to 1 cm below, placed in a thermostatic bath adjusted to 60 ° C. and left for 24 hours, and the occurrence of blistering was observed.
引張接着試験と剪断接着試験用供試体もブリスタリング評価用供試体と同様にＤＫ５５０−００３を９００ｇ／ｍ2の割合で塗布した後、４号硅砂を１．０Ｋｇ／ｍ2となるよう手で均一に撒布した。ブリスタリング確認試験と同様指触による硬化を確認した後「ガムファルトＢ」を加熱溶解し、試験体表面に １．２Ｋｇ／ｍ2 になる様流し込ながら、同時にアスファルト系シート防水材「ラバソイドＩＩ」を貼り付けた。次に、１６０℃に加熱した最大粒径１３ｍｍの骨材と改質ＩＩ型アスファルトを含有した密粒アスファルト混合物を厚さ４ｃｍになる様にコンパクターを使用して舗設を行った。引張接着試験、剪断接着試験は実施例１と同様に「道路橋床版防水便覧」の付録−１試験方法の中に規定されている方法に準拠して行った。 In the same manner as the test specimen for the blistering evaluation, after applying DK550-003 at a rate of 900 g / m 2 , the test specimen for the tensile adhesion test and the shear adhesion test was manually adjusted so that No. 4 cinnabar was 1.0 Kg / m 2. Evenly distributed. As with the blistering confirmation test, after confirming the curing by touch, “Gumphalt B” is dissolved by heating and poured into the surface of the test specimen to 1.2 kg / m 2 , while at the same time asphalt sheet waterproofing material “Rabasoid II” Was pasted. Next, pavement was performed using a compactor so that a dense asphalt mixture containing aggregates having a maximum particle size of 13 mm heated to 160 ° C. and modified type II asphalt had a thickness of 4 cm. The tensile adhesion test and the shear adhesion test were carried out in the same manner as in Example 1 in accordance with the method specified in Appendix-1 Test Method of “Road Bridge Slab Waterproof Handbook”.
（実施例３）
本実施例では、ラジカル硬化型樹脂組成物である「デッキコートＮ」の塗布量を５０ｇ／ｍ2とし、硅砂を散布しない事以外は実施例１と同様に試験体を作成しブリスタリング評価試験と引張接着試験、剪断接着試験を行なった。
(Example 3)
In this example, a test specimen was prepared in the same manner as in Example 1 except that the coating amount of “deck coat N”, which is a radical curable resin composition, was 50 g / m 2 and no dredged sand was sprayed, and a blistering evaluation test Tensile adhesion test and shear adhesion test were conducted.
（実施例４）
本実施例では、ラジカル硬化型樹脂組成物である「デッキコートＮ」の代わりにＤＫ５５０−００７を３００ｇ／ｍ2塗布した後、４号硅砂を０．２Ｋｇ／ｍ2撒布した。硅砂の固着を指触で確認して、ＤＫ５５０−００７の硬化した事を確認した後、東亜道路工業社製アスファルトコンパウンド「タフコンパウンド」を加熱溶融して１．２Ｋｇ／ｍ2になる様試験体表面に流し込みながら同じく東亜道路工業社製シート防水材「タフシャットＩ型」を貼り付けた以外は実施例１と同様に試験体を作成し、ブリスタリング評価試験と引張接着試験、剪断接着試験を行なった。尚、ＤＫ５５０−００７の２０℃における粘度は約７００ｍＰａ・ｓである。「タフシャットＩ」は、流し貼り型のアスファルト系シート防水材である。
Example 4
In this example, DK550-007 was applied in an amount of 300 g / m 2 instead of “Deck Coat N” which is a radical curable resin composition, and then No. 4 cinnabar sand was applied in an amount of 0.2 kg / m 2 . After confirming the fixation of cinnabar by finger and confirming that DK550-007 has hardened, the asphalt compound “Tough Compound” manufactured by Toa Road Industry Co., Ltd. is heated and melted to become 1.2 kg / m 2. A test specimen was prepared in the same manner as in Example 1 except that the sheet waterproofing material “Tough Shut Type I” manufactured by Toa Road Industry Co., Ltd. was applied while being poured onto the surface, and a blistering evaluation test, a tensile adhesion test, and a shear adhesion test were conducted. I did it. The viscosity of DK550-007 at 20 ° C. is about 700 mPa · s. “Tough Shut I” is a flow-attached asphalt-based waterproofing material.
（実施例５）
本実施例では、実施例１と同様に２０℃の雰囲気下で硬化時間を３０分に調整した「デッキコートＮ」を２００ｇ／ｍ2 塗布した後、２０℃の雰囲気下で３０分以上静置した後、東亜道路工業社製常温接着型シート防水材「タフシャットＩＩＩ型」を貼り付け、ローラーで転圧し、珪砂を散布しなかったこと以外は実施例１と同様に試験体を作成し、ブリスタリング評価と引張接着試験並びに剪断接着試験を行った。
(Example 5)
In this example, after applying 200 g / m 2 of “Deck Coat N” having a curing time adjusted to 30 minutes in an atmosphere of 20 ° C. as in Example 1, it was allowed to stand for 30 minutes or more in an atmosphere of 20 ° C. After that, a test specimen was prepared in the same manner as in Example 1 except that a room temperature adhesive sheet waterproofing material “Tough Shut III type” manufactured by Toa Road Industry Co., Ltd. was applied, rolled with a roller, and silica sand was not sprayed. Blistering evaluation, tensile adhesion test and shear adhesion test were conducted.
以上の結果を表１〜２に示す。 The above results are shown in Tables 1-2.
（比較例１）
本比較例では実施例１と同様にブラスト処理して表面のレイタンスを除去した３０ｃｍ×３０ｃｍ×６ｃｍのコンクリート平板を３枚用意し、ブリスタリング評価、引張接着力評価および剪断接着試験に使用した。実施例１と同様にブリスタリング評価試験用の供試体は予めエポキシ樹脂でシールして２０℃の水中に２４時間以上全面浸漬した。水中から取り出してウエス等で水分をふき取り、アクリル系ラジカル硬化性液状樹脂組成物の代わりにニチレキ社製アスファルト系プライマー「カチコート」を０．４リッター／ｍ2塗布して３０分以上放置し、指触で乾燥を確認した後実施例１と同様に加熱溶融した「ガムファルトＢ」を１．２Ｋｇ／ｍ2になる様流し込みながらシート防水材「ラバソイドＩＩ」を貼り付けた。
(Comparative Example 1)
In this comparative example, three 30 cm × 30 cm × 6 cm concrete plates from which surface latencies were removed by blasting in the same manner as in Example 1 were prepared and used for blistering evaluation, tensile adhesion evaluation, and shear adhesion test. In the same manner as in Example 1, the specimen for the blistering evaluation test was previously sealed with an epoxy resin and immersed in water at 20 ° C. for 24 hours or more. Remove from the water, wipe off the moisture with a cloth, apply 0.4 liter / m 2 of Nichireki asphalt primer “Kachi Coat” instead of the acrylic radical curable liquid resin composition, and leave it for at least 30 minutes. After confirming drying by touch, the sheet waterproofing material “Rabasoid II” was pasted while pouring “Gumphalt B”, which was heated and melted in the same manner as in Example 1, to 1.2 kg / m 2 .
実施例１と同様に金属製バットに供試体表面から１ｃｍ下まで６０℃の温水を注ぎ、６０℃に調整した恒温槽に入れて２４時間放置してブリスタリングの個数を目視により計数した。 In the same manner as in Example 1, hot water of 60 ° C. was poured into the metal bat from the surface of the specimen to 1 cm below, placed in a thermostatic bath adjusted to 60 ° C., left for 24 hours, and the number of blistering was counted visually.
ブリスタリング試験と同様の手順で引張強度試験用、剪断強度試験用供試体を作成し、実施例１と同様に最大粒径１３ｍｍの骨材と改質ＩＩ型アスファルトを使用した密粒アスファルト混合物を厚さ４ｃｍになる様計量して線圧３０Ｋｇ／ｃｍに調整したコンパクターにより舗設した。 Samples for tensile strength test and shear strength test were prepared in the same procedure as in the blistering test, and a dense asphalt mixture using aggregate with a maximum particle size of 13 mm and modified type II asphalt in the same manner as in Example 1. The sample was weighed so as to have a thickness of 4 cm and paved with a compactor adjusted to a linear pressure of 30 kg / cm.
引張接着試験は実施例１と同様に「道路橋床版防水便覧」付録−１試験方法に準拠して行った。
供試体に直径１０ｃｍの切れ込みをコンクリート板に達するまで入れ、直径１０ｃｍの金属製治具を接着した後、２０℃の雰囲気で６時間以上養生を行った後、建研式引張り試験機により測定を行った。
The tensile adhesion test was conducted in the same manner as in Example 1 according to the test method in Appendix-1 “Road Bridge Floor Waterproof Manual”.
Insert a 10 cm diameter notch into the specimen until it reaches the concrete plate, and after bonding a metal jig with a diameter of 10 cm, and curing for 6 hours or more in an atmosphere at 20 ° C., measure with a Kenken-type tensile tester. went.
剪断接着試験も実施例１と同様に「道路橋床版防水便覧」の付録−１試験方法に準拠して１０ｃｍ×１０ｃｍの供試体を作成し、２０℃の雰囲気に６時間以上静置した後測定を行った。引張接着試験並びに剪断接着試験共に３回試験を行いその平均値をそれぞれ引張接着強度、剪断接着強度とした。 In the same manner as in Example 1, the shear adhesion test was performed by preparing a 10 cm × 10 cm specimen in accordance with the test method in Appendix-1 of “Road Bridge Floor Waterproofing Handbook” and allowing it to stand in an atmosphere of 20 ° C. for 6 hours or more. Measurements were made. Both the tensile adhesion test and the shear adhesion test were conducted three times, and the average values were taken as the tensile adhesion strength and the shear adhesion strength, respectively.
（比較例２）
デッキコートＮとその上に散布する硅砂の代わりに東亜道路工業社製アスファルト系プライマー「シビルスター」を０．４リッター／ｍ2使用し、プライマーが乾燥した事を確認した後、東亜道路工業社製常温接着型シート防水材「タフシャットＩＩＩ」を貼り付けた以外は実施例５と同様に試験体を作成し、ブリスタリング試験と引張接着試験、剪断接着試験を実施した。
(Comparative Example 2)
Instead of Deck Coat N and the dredged sand sprayed on it, 0.4 liter / m 2 of asphalt primer “Sybyl Star” made by Toa Road Industry Co., Ltd. was used. After confirming that the primer was dry, Toa Road Industry Co., Ltd. A test specimen was prepared in the same manner as in Example 5 except that the room temperature adhesive sheet waterproofing material “Tough Shut III” was affixed, and a blistering test, a tensile adhesion test, and a shear adhesion test were performed.
（実施例６）
「デッキコートＮ」の代わりに、２０℃の時の粘度が約４０００ｍＰａ・ｓである「ＤＫ５５０−０４」を用いたこと以外は実施例１と同様に試験体を作成してブリスタリング評価と引張接着試験、剪断接着試験を行った。
(Example 6)
A test specimen was prepared in the same manner as in Example 1 except that “DK550-04” having a viscosity of about 4000 mPa · s at 20 ° C. was used instead of “Deck Coat N”, and blistering evaluation and tension were performed. An adhesion test and a shear adhesion test were performed.
（実施例７）
デッキコートＮの塗布量が３０ｇ／ｍ2である事と「デッキコートＮ」の上に散布する硅砂５号を
０．８ｋｇ／ｍ2使用したこと以外は実施例１と同様に試験体を作成してブリスタリング評価と引張接着強度、剪断接着強度を測定した。
(Example 7)
A test specimen was prepared in the same manner as in Example 1 except that the coating amount of Deck Coat N was 30 g / m 2 and that 0.8 kg / m 2 of cinnabar No. 5 sprayed on “Deck Coat N” was used. Then, blistering evaluation, tensile bond strength, and shear bond strength were measured.
（実施例８）
ＤＫ５５０−００３の塗布量が３００ｇ／ｍ2である事と４号硅砂の散布量が１．８Ｋｇ／ｍ2であること以外は実施例２と同様に試験体を作成してブリスタリング評価、引張接着強度測定と剪断接着強度測定を行った。
(Example 8)
A test specimen was prepared in the same manner as in Example 2 except that the coating amount of DK550-003 was 300 g / m 2 and the spraying amount of No. 4 cinnabar was 1.8 Kg / m 2. Adhesive strength measurement and shear adhesive strength measurement were performed.
（比較例３）
比較例１と同様にレイタンスを除去したコンクリート平板を３枚用意した。ブリスタリング評価用の供試体は比較例１と同様にエポキシ樹脂でシールをした後、アクリル系ラジカル硬化性液状樹脂組成物の代わりに「カチコート」を０．４リッター／ｍ2塗布した。引張接着試験と剪断接着試験用供試体も比較例１と同様に「カチコート」を０．４リッター／ｍ2塗布した。次にこれら供試体に最大粒径１３ｍｍの骨材と改質ＩＩ型アスファルトを使用した密粒アスファルト混合物を厚さ４ｃｍになる様計量して線圧３０Ｋｇ／ｃｍに調整したコンパクターにより舗設した。
(Comparative Example 3)
As in Comparative Example 1, three concrete flat plates from which latency was removed were prepared. The specimen for blistering evaluation was sealed with an epoxy resin in the same manner as in Comparative Example 1, and then “Kachi Coat” was applied in an amount of 0.4 liter / m 2 instead of the acrylic radical curable liquid resin composition. Similarly to Comparative Example 1, the specimens for tensile adhesion test and shear adhesion test were coated with 0.4 liter / m 2 of “Kachi Coat”. Next, a dense asphalt mixture using aggregate and modified type II asphalt having a maximum particle size of 13 mm was weighed on these specimens to a thickness of 4 cm, and paved by a compactor adjusted to a linear pressure of 30 kg / cm.
ブリスタリング評価用供試体は比較例１と同様に、供試体表面から１ｃｍ下まで６０℃の温水に浸漬して６０℃に調整した恒温槽に入れて２４時間放置し、ブリスタリングの発生を目視により確認した。 As in Comparative Example 1, the test specimen for blistering evaluation was immersed in warm water at 60 ° C. from the surface of the test specimen to 1 cm below and placed in a thermostatic bath adjusted to 60 ° C. and left for 24 hours, and the occurrence of blistering was visually observed. Confirmed by
比較例１と同様に、引張接着強度並びに剪断接着強度は「道路橋床版防水便覧」の付録−１試験方法に準拠して測定を行った。引張接着試験並びに剪断接着試験共に３回試験を行いその平均値をそれぞれ引張接着強度、剪断接着強度とした。
以上の結果を表３〜４に示す。
As in Comparative Example 1, the tensile bond strength and the shear bond strength were measured in accordance with Appendix-1 test method of “Road Bridge Floor Waterproof Manual”. Both the tensile adhesion test and the shear adhesion test were conducted three times, and the average values were taken as the tensile adhesion strength and the shear adhesion strength, respectively.
The above results are shown in Tables 3-4.
（実施例９）
本実施例では、ＪＩＳ Ａ １１０６．３（供試体）で規定されている方法で作成した１０ｃｍ×１０ｃｍ×４０ｃｍのコンクリート供試体をほぼ中心部で割裂し、割れ部分に０．２ｍｍのスペーサーを挟み込み、０．２ｍｍ幅のクラックを有するコンクリート供試体を３本準備した。次に、蛍光染料を配合した「デッキコートＮ」、「ＤＫ ５５０−００３」、「ＤＫ ５５０−００７」を２００ｇ／ｍ2となるように夫々の供試体にゴムベラで塗布した。その後、塗布したアクリル系ラジカル硬化型樹脂組成物が硬化する前にクラック部分から再度割裂し、ブラックライトを当ててアクリル系ラジカル硬化型樹脂組成物の浸透深さを測定し１０ｍｍ以上含浸している事を確認した。
Example 9
In this example, a 10 cm × 10 cm × 40 cm concrete specimen created by the method specified in JIS A 1106.3 (specimen) is split at almost the center, and a 0.2 mm spacer is sandwiched between the cracks. Three concrete specimens having cracks with a width of 0.2 mm were prepared. Next, “Deck Coat N”, “DK 550-003”, and “DK 550-007” blended with a fluorescent dye were applied to each specimen with a rubber spatula so as to be 200 g / m 2 . Then, before the applied acrylic radical curable resin composition is cured, it is split again from the crack, and the penetration depth of the acrylic radical curable resin composition is measured by applying black light and impregnated by 10 mm or more. I confirmed that.
（実施例１０）
本比較例は、ＪＩＳ Ａ １１０６．３（供試体）で規定されている方法で作成した１０ｃｍ×１０ｃｍ×４０ｃｍのコンクリート供試体をほぼ中心部で割裂し、割れ部分に０．２ｍｍのスペーサーを挟み込み、０．２ｍｍ幅のクラックを有するコンクリート供試体を１本準備した。次に、蛍光染料を配合した「ＤＫ ５５０−０４」を２００ｇ／ｍ2となるようにゴムベラで塗布した。その後、実施例９と同様に塗布したアクリル系ラジカル硬化型樹脂組成物が硬化する前にクラック部分から再度割裂し、ブラックライトを当ててアクリル系ラジカル硬化型樹脂組成物の浸透深さを測定し、浸透深さが１０ｍｍに満たない事を確認した。
(Example 10)
In this comparative example, a 10 cm × 10 cm × 40 cm concrete specimen prepared by the method defined in JIS A 1106.3 (specimen) is split almost at the center, and a 0.2 mm spacer is sandwiched between the cracks. A concrete specimen having a crack with a width of 0.2 mm was prepared. Next, “DK 550-04” blended with a fluorescent dye was applied with a rubber spatula at 200 g / m 2 . Then, before the acrylic radical curable resin composition applied in the same manner as in Example 9 was cured, it was split again from the crack portion, and the penetration depth of the acrylic radical curable resin composition was measured by applying black light. It was confirmed that the penetration depth was less than 10 mm.
実施例９〜１０の結果を表５に示す。 The results of Examples 9 to 10 are shown in Table 5.
本発明は、コンクリート床版にアクリル系ラジカル硬化性液状樹脂組成物を塗布、含浸硬化させる事で床版と一体化した防水性能を持つ水蒸気不透過層を形成する。本発明の床版防水施工方法は、例えば、同時にひび割れを一体化する工程と、アスファルト系シート防水材の施工工程とからなる。本発明の床版防水施工方法は、床版表面に形成した水蒸気不透過層により、床版からの水蒸気を遮断する事でブリスタリングの発生を防ぐと同時に、床版のクラック補修を行う事で長期に亘って防水性能を確保し、橋梁や高架の劣化や損傷を防ぐ床版防水構造体を提供できる。 In the present invention, an acrylic radical-curable liquid resin composition is applied to a concrete floor slab and impregnated and cured to form a water vapor impermeable layer having a waterproof performance integrated with the floor slab. The floor slab waterproofing construction method of the present invention includes, for example, a process of simultaneously integrating cracks and a construction process of asphalt sheet waterproofing material. The floor slab waterproofing construction method of the present invention prevents the occurrence of blistering by blocking water vapor from the floor slab by the water vapor impermeable layer formed on the floor slab surface, and at the same time repairing cracks in the floor slab. It is possible to provide a waterproof slab structure that ensures waterproof performance over a long period of time and prevents deterioration and damage to bridges and overpasses.
本発明は、引張接着強度（２０℃）が、０．６Ｎ／ｍｍ2以上だと社団法人「日本道路協会」の「道路橋床版防水便覧」に定める防水材の基本照査項目の規格値を満足する。本発明は、剪断接着強度（２０℃）が、０．１５Ｎ／ｍｍ2以下だと引張接着強度を満足し、「道路橋床版防水便覧」に定める防水材の基本性能照査項目の規格値を満足する。 In the present invention, when the tensile adhesive strength (20 ° C.) is 0.6 N / mm 2 or more, the standard value of the basic check item of the waterproof material defined in “Road Bridge Flooring Waterproof Handbook” of “Japan Road Association” is set. Satisfied. In the present invention, when the shear adhesive strength (20 ° C.) is 0.15 N / mm 2 or less, the tensile adhesive strength is satisfied, and the standard value of the basic performance check item of the waterproof material defined in “Road Bridge Flooring Waterproof Handbook” is set. Satisfied.
本発明者は、更に種々検討を重ねた結果、以前より提案しているアクリル系ラジカル硬化性液状樹脂組成物が床版中の水蒸気の透過を阻止する性能を有する事を新たに見出し、アスファルト系シート防水材と組み合わせることで課題であったブリスタリング現象を解決出来ることを見出し、本発明を完成するに至った。 As a result of further various studies, the inventor newly found out that the previously proposed acrylic radical curable liquid resin composition has the ability to prevent the permeation of water vapor in the floor slab, and the asphalt type The present inventors have found that the blistering phenomenon, which has been a problem, can be solved by combining with a sheet waterproofing material, and have completed the present invention.
即ち、本発明は従来のアスファルト系プライマーの代わりにアクリル型ラジカル硬化性液状樹脂組成物を使用する事により、今までアスファルト系シート防水材で課題であったブリスタリングを防ぐ事を目的としている。 That is, the present invention aims to prevent blistering, which has been a problem with conventional asphalt sheet waterproofing materials, by using an acrylic radical curable liquid resin composition instead of a conventional asphalt primer.
本発明はアスファルト系シート防水材施工時に従来のアスファルト系プライマーに代えてアクリル系ラジカル硬化性液状樹脂組成物を塗布する工法を提案している。 The present invention proposes a method of applying an acrylic radical-curable liquid resin composition in place of a conventional asphalt primer during construction of an asphalt-based sheet waterproofing material.
同時に、従来本発明が既に指摘している通り、防水性能に対する信頼性を格段に高める事ができ、床版の耐久性能を更に高める事もできる。 At the same time, as already pointed out by the present invention, the reliability with respect to the waterproof performance can be remarkably enhanced, and the durability performance of the floor slab can be further enhanced.
本発明で提案している床版防水方法及び床版防水構造体は、新設床版、並びに既設床版の舗装打ち替えの場合、双方に適応が可能である。 The floor slab waterproofing method and floor slab waterproof structure proposed in the present invention can be applied to both a newly installed floor slab and an existing floor slab.
本発明は、道路橋の鉄筋コンクリート床版を始めとするいろいろな建築、土木分野の防水工法として有効であり、産業上非常に有用である。 The present invention is effective as a waterproofing method in various construction and civil engineering fields including reinforced concrete floor slabs for road bridges, and is very useful in industry.
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| CN103924495A (en) * | 2013-01-15 | 2014-07-16 | 上海市政工程设计研究总院（集团）有限公司 | Small and medium-sized steel bridge deck pavement system and implementation method |
| JP3194555U (en) * | 2014-09-17 | 2014-11-27 | 田島ルーフィング株式会社 | White roofing |
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| KR20200067505A (en) * | 2018-12-04 | 2020-06-12 | 주식회사 세일매트릭스 | Heating bridge deck waterproofing layer of epoxy asphaltand constructing method of the same |
| JP2020147966A (en) * | 2019-03-13 | 2020-09-17 | 首都高速道路株式会社 | Construction method and laminated structure for suppressing the evaporation of water from a concrete slab |
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