JP4936115B2 - Protective concrete stretchable jointed composite sheet used in roof waterproofing repair method, roof waterproofing repair method using the same and waterproof structure of waterproofed roof - Google Patents
Protective concrete stretchable jointed composite sheet used in roof waterproofing repair method, roof waterproofing repair method using the same and waterproof structure of waterproofed roof Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims description 54
- 239000002131 composite material Substances 0.000 title claims description 53
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- 238000004078 waterproofing Methods 0.000 title claims description 31
- 238000000034 method Methods 0.000 title claims description 22
- 239000010410 layer Substances 0.000 claims description 59
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- 230000001070 adhesive effect Effects 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
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- 238000007747 plating Methods 0.000 claims description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
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- 238000009419 refurbishment Methods 0.000 claims description 3
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- 239000003973 paint Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 description 10
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 9
- 229910001335 Galvanized steel Inorganic materials 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
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- 230000000052 comparative effect Effects 0.000 description 6
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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- 238000009825 accumulation Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 239000011083 cement mortar Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
この発明は、屋根の防水改修工事を行う際に使用される伸縮目地被着用複合シート及びそれを使用する屋根の防水改修工法並びに防水改修された屋根の防水構造に関するものである。 The present invention relates to a stretchable joint-attached composite sheet used when performing waterproof repair work on a roof, a waterproof repair method for a roof using the composite sheet, and a waterproof structure for a waterproof roof.
従来、建造物の屋根に防水材層を施工する場合、多数の保護コンクリートの熱膨張によるせり上がりや圧壊を防ぐために、保護コンクリートと隣接する他の保護コンクリートとの間に伸縮目地を挟入して設け、応力の伝達を緩和する構造を採用している。
また、一般的に保護コンクリート（押えコンクリート）の目地処理においては、樹脂製の伸縮目地材をコンクリ―ト打設前に設置しておき、その周りにコンクリートを打設して保護コンクリートを形成する際に、前記伸縮目地目地表面にキャップを被せて、同目地表面を前記保護コンクリート面と同じレベルに平滑に合わせる方法が取られている。
Conventionally, when a waterproof layer is applied to the roof of a building, an expansion joint is inserted between the protective concrete and other adjacent protective concrete in order to prevent the rise and collapse of many protective concrete due to thermal expansion. To reduce stress transmission.
Generally, in joint treatment of protective concrete (pressing concrete), a resin-made stretch joint material is installed before concrete is placed, and concrete is placed around it to form protective concrete. In this case, a method is adopted in which a cap is put on the surface of the expansion joint and the surface of the joint is smoothly adjusted to the same level as the protective concrete surface.
さらに、経年後の屋根の防水改修工法において、この保護コンクリート面上に新たに防水層を設ける場合、一般的には既存の目地材を除去し、次いで目地除去済み空間内部に発泡材等によるスペーサーを設置し、その上にシーリング材等の充填を行って目地上面を平滑に均した後、前記の新たな防水材層を設ける方法が取られている。
また、前記において目地上面を平滑にするため、低い目地面へセメントモルタルを充填して、平滑にすることもあるが、この場合は、伸縮目地の機能は失われてしまう。
In addition, when a waterproof layer is newly provided on this protective concrete surface in the roof waterproofing refurbishment method after aging, generally the existing joint material is removed, and then a spacer made of foaming material or the like inside the joint-removed space Is installed, and a sealing material or the like is filled thereon to smooth the joint upper surface, and then the above-mentioned new waterproof material layer is provided.
Further, in the above, in order to smooth the joint upper surface, cement mortar may be filled into the lower joint ground to make it smooth, but in this case, the function of the stretch joint is lost.
そしてまた、既存の目地材を除去し、その上方部を粘着層つきシートで被覆する処理や、その上方部にシート状の材料を接着剤で貼り付けて被覆することもある。
しかし粘着層が薄いシート又は接着剤で貼り付けられたシートは、伸縮目地の伸縮量が大きくなった場合、緩衝効果が減少し、その上面の防水層へ悪影響を与える。
In addition, the existing joint material may be removed and the upper portion thereof may be covered with a sheet with an adhesive layer, or the upper portion may be covered with a sheet-like material attached with an adhesive.
However, a sheet with a thin adhesive layer or a sheet attached with an adhesive has a buffering effect that decreases when the expansion / contraction amount of the expansion / contraction joint increases, and adversely affects the waterproof layer on the top surface.
上記のいずれの処理の場合においても、要望されることは、最上部の防水材層を平滑に仕上げると共に、伸縮目地の温度変化による伸縮変形を目地上面の新設の防水材層へ伝えないようにすることである。
経年後の屋根の防水改修工法において、保護コンクリートの上に新たな防水層を施工する際に、まず目地表面部分の平滑化処理としてシーリング材などによる目地材の追加充填が行われる。
次いでその上方へ、防水工法の一つであるアスファルト防水材層を設ける施工をすると、目地部分のシーリング材から上面の防水材層に可塑剤の一部が移行し、防水材層の物性に悪影響を与えることが懸念される。
また、他の防水工法を選定した場合でも、シーリング材の硬化時における収縮による体積変化によって、目地部分に窪みが発生し、施工後、ゴミや埃が溜まってしまうことが懸念される。
さらにまた、柔らかなシートで処理しても、目地部分に同様な窪みが発生する。
When a new waterproof layer is constructed on the protective concrete in the roof waterproofing repair method after a lapse of time, the joint material is additionally filled with a sealing material or the like as a smoothing treatment of the joint surface portion.
Next, when an asphalt waterproofing material layer, which is one of the waterproofing methods, is installed above, a part of the plasticizer is transferred from the sealing material at the joint to the waterproofing material layer on the upper surface, adversely affecting the physical properties of the waterproofing material layer. Concerned about giving.
In addition, even when other waterproofing methods are selected, there is a concern that dents may occur in the joints due to volume changes due to shrinkage when the sealing material is cured, and dust and dust accumulate after construction.
Furthermore, even if it processes with a soft sheet | seat, the same hollow will generate | occur | produce in a joint part.
本発明はこのような問題を解決するためになされたもので、保護コンクリートと隣接する他の保護コンクリートとの間に伸縮目地が介在しても、上面の新規の防水層へ影響を与えない伸縮目地被着用シートを提供し、及びそれを使用する屋根の防水改修工法並びに防水改修された屋根の防水構造を提供することを課題とする。 The present invention has been made to solve such problems, and even if an expansion joint is interposed between the protective concrete and another adjacent protective concrete, the expansion and contraction does not affect the new waterproof layer on the upper surface. It is an object of the present invention to provide a jointed sheet, and to provide a waterproof repair method for roofs using the sheet and a waterproof structure for roofs that have been waterproofed.
本発明は、下記構成の屋根の防水改修工法において使用される保護コンクリートの伸縮目地被着用複合シート及びそれを使用する屋根の防水改修工法並びに防水改修された屋根の防水構造である。
[１] 屋根の防水改修工法において使用される、躯体コンクリート（５）面のアスファルト防水層（４）上に載置された保護コンクリート（２）と隣接する他の保護コンクリート（２）と間の伸縮目地（３）の上部面近傍に被着される伸縮目地被着用複合シート（１）であって、薄板の鋼板（１１）とその裏面に積層される粘着材層（１２）とからなるものであることを特徴とする伸縮目地被着用複合シート。
[２] 屋根の防水改修工法において使用される、躯体コンクリート（５）面のアスファルト防水層（４）上に載置された保護コンクリート（２）と隣接する他の保護コンクリート（２）と間の伸縮目地（３）の上部面近傍に被着される剥離材層付き伸縮目地被着用複合シート（１’）であって、薄板の鋼板（１１）と粘着材層（１２）と剥離材層（１３）とが順に積層されてなるものであることを特徴とする伸縮目地被着用複合シート。
[３] 薄板の鋼板（１１）の厚みが０．２ｍｍ以下であり、粘着材層（１２）の厚みが０．３〜１．０ｍｍであることを特徴とする請求項１又は２に記載の伸縮目地被着用複合シート。
The present invention relates to a protective concrete stretchable joint wearing composite sheet used in a roof waterproof repair method having the following configuration, a roof waterproof repair method using the same, and a waterproof structure of a waterproof roof.
[1] Between the protective concrete (2) placed on the asphalt waterproofing layer (4) on the frame concrete (5) and other adjacent protective concrete (2) used in the waterproofing method for roofs A stretch joint-attached composite sheet (1) deposited near the upper surface of the stretch joint (3), comprising a thin steel plate (11) and an adhesive layer (12) laminated on the back surface thereof. A composite sheet for wearing stretchable joints.
[2] Between the protective concrete (2) placed on the asphalt waterproofing layer (4) on the frame concrete (5) and other adjacent protective concrete (2) used in the waterproofing construction method for roofs An elastic joint-attached composite sheet (1 ′) with a release material layer applied in the vicinity of the upper surface of the elastic joint (3), comprising a thin steel plate (11), an adhesive material layer (12), and a release material layer ( 13) and a stretchable joint-attached composite sheet characterized by being laminated in order.
[3] The thin steel plate (11) has a thickness of 0.2 mm or less, and the adhesive layer (12) has a thickness of 0.3 to 1.0 mm. Composite sheet with elastic joints.
[４] 鋼板（１１）が、ステンレス鋼であることを特徴とする請求項1〜３のいずれか１項に記載の伸縮目地被着用複合シート。
[５] 鋼板（１１）が、鋼板の表面に亜鉛系めっきを施した鋼板であることを特徴とする請求項1〜３のいずれか１項に記載の伸縮目地被着用複合シート。
[６] 亜鉛系めっきが、亜鉛とアルミニウムを含む合金めっきからなるものであることを特徴とする請求項５記載の伸縮目地被着用複合シート。
[７] 粘着材（１２）がＳＢＳ又は再生ブチルゴムの添加により改質された改質アスファルトであることを特徴とする請求項１〜５のいずれか１項に記載の伸縮目地被着用複合シート。
[８] 伸縮目地被着用複合シート（１）の幅が５〜１５ｃｍであることを特徴とする請求項１〜７のいずれか１項に記載の伸縮目地被着用複合シート。
[4] The stretchable jointed composite sheet according to any one of claims 1 to 3, wherein the steel plate (11) is stainless steel.
[5] The stretchable jointed composite sheet according to any one of claims 1 to 3, wherein the steel plate (11) is a steel plate having a surface plated with zinc.
[6] The stretchable jointed composite sheet according to [5], wherein the zinc-based plating is made of an alloy plating containing zinc and aluminum.
[7] The stretchable jointed composite sheet according to any one of [1] to [5], wherein the adhesive (12) is modified asphalt modified by addition of SBS or recycled butyl rubber.
[8] The stretchable joint wearing composite sheet according to any one of claims 1 to 7, wherein the stretchable joint wearing composite sheet (1) has a width of 5 to 15 cm.
[９] 躯体コンクリート（５）面のアスファルト防水層（４）上に載置された保護コンクリート（２）と隣接する他の保護コンクリート（２）との間の伸縮目地（３）の上部面近傍に伸縮目地被着用複合シート（１）を被着し、次いで同伸縮目地被着用複合シート（１）上面と露出する前記保護コンクリート（２）上面との全上面に防水材層（６）を一体的に設ける屋根の防水改修工法において、前記伸縮目地被着用複合シート（１）として厚み０．２ｍｍ以下の請求項１〜８のいずれか１項に記載の鋼板（１１）とその裏面に積層された厚み０．３〜１．０ｍｍの粘着材層（１２）とからなるものを使用することを特徴とする屋根の防水改修工法。
[１０] 防水材層（６）がウレタン塗膜防水材層であることを特徴とする請求項９記載の屋根の防水改修工法。
[１１] 躯体コンクリート（５）とアスファルト防水層（４）と保護コンクリート（２）と防水材層（６）とが順に積層されてなり、かつ前記保護コンクリート（２）と隣接する他の保護コンクリート（２）の間に伸縮目地（３）が挟入され、更に該伸縮目地（３）の上部面近傍に、０．２ｍｍ厚以下の請求項１〜８のいずれか１項に記載の鋼板（１１）とその裏面に０．３〜１．０ｍｍ厚の粘着材層（１２）が積層されてなる伸縮目地被着用複合シート（１）が被着されてなることを特徴とする防水改修された屋根の防水構造。
[9] Near the upper surface of the stretch joint (3) between the protective concrete (2) placed on the asphalt waterproofing layer (4) on the frame concrete (5) and other adjacent protective concrete (2) A composite sheet (1) is attached to the stretch joint, and then a waterproof layer (6) is integrally formed on the upper surface of the composite sheet (1) and the exposed upper surface of the protective concrete (2). In the waterproof renovation method of the roof provided, the steel sheet (11) according to any one of claims 1 to 8 having a thickness of 0.2 mm or less and laminated on the back surface thereof as the stretch joint wearing composite sheet (1). A waterproof repair method for roofs, comprising using an adhesive layer (12) having a thickness of 0.3 to 1.0 mm.
10. The roof waterproofing repair method according to claim 9, wherein the waterproof material layer (6) is a urethane paint film waterproof material layer.
[11] Other protective concrete in which the frame concrete (5), the asphalt waterproofing layer (4), the protective concrete (2), and the waterproofing material layer (6) are laminated in order and adjacent to the protective concrete (2) The expansion and contraction joint (3) is inserted between (2), and the steel sheet according to any one of claims 1 to 8 having a thickness of 0.2 mm or less in the vicinity of the upper surface of the expansion joint (3). 11) and a waterproof refurbishment characterized in that a stretchable joint-attached composite sheet (1) formed by laminating an adhesive material layer (12) having a thickness of 0.3 to 1.0 mm on the back surface is applied. Waterproof construction of the roof.
保護コンクリートの伸縮目地部分上面近傍に、本願発明の剛性の高い金属板、特に鋼板の裏面に粘着材層を積層してなる伸縮目地被着用複合シートを被着して設けると、鋼板部分の剛性により、目地部分上面に窪みが形成されず平坦性が維持できるため（すなわち、目地部を挟んで存在する両隣の保護コンクリート上端縁面付近に、目地部上面を覆うようにして架設された伸縮目地被着用複合シートが変形しないで平面性を維持するため）、その上に施工された新規の防水材層が平滑な仕上がりとなる。
また、温度変化等によって目地部が伸縮して、変形しても、架設された伸縮目地被着用複合シートは凹凸状に変形しないため、その上面の防水材層には変形や化学成分の移行による影響を与えず、そしてまた、上面に設けられた新規の防水材層表面にゴミや埃が堆積するのを抑えることができる。
さらに本願発明に係る目地被着用複合シートは、目地部分に充填されたシーリング材や目地材に含まれる可塑剤が上面の新規防水材層へ移行することが防止する役割を果たす。
When the high-strength metal plate of the present invention, particularly a stretchable joint-attached composite sheet formed by laminating an adhesive material layer on the back surface of the steel plate, is applied in the vicinity of the upper surface of the stretchable joint portion of the protective concrete. Because of this, it is possible to maintain flatness without forming a depression on the upper surface of the joint portion (that is, an expansion joint that is installed to cover the upper surface of the joint portion in the vicinity of the upper edge of the protective concrete on both sides of the joint portion. In order to maintain flatness without deformation of the composite sheet to be worn), a new waterproof material layer applied thereon has a smooth finish.
In addition, even if the joint portion expands and contracts due to temperature changes, etc., the stretchable jointed composite sheet does not deform unevenly, so the waterproof material layer on the top surface is deformed or transferred by chemical components It is possible to suppress the accumulation of dust and dirt on the surface of the new waterproof material layer provided on the upper surface without affecting the surface.
Further, the joint wearing composite sheet according to the present invention plays a role of preventing the sealing material filled in the joint part and the plasticizer contained in the joint material from being transferred to the new waterproof material layer on the upper surface.
そしてまた、伸縮目地被着用複合シートを構成する金属鋼板として、特にステンレス鋼板、亜鉛めっき鋼板あるいは亜鉛とアルミニウムを含有する合金めっき鋼板を使用した場合には、耐食性に優れたものとなる。
また、本願発明に係る粘着材としては、好ましくは耐水性、耐アルカリ性、耐久性に優れた、改質アスファルト系の材料が用いられ、長期にわたり機能が持続される。
In addition, when a stainless steel plate, a galvanized steel plate, or an alloy-plated steel plate containing zinc and aluminum is used as the metal steel plate constituting the composite joint for wearing stretch joints, the corrosion resistance is excellent.
In addition, as the adhesive material according to the present invention, a modified asphalt material having excellent water resistance, alkali resistance, and durability is preferably used, and the function is maintained for a long time.
以下、本発明の実施形態について、図面にしたがって説明する。
（実施形態１）
図１に示すように、本実施形態の目地被着用複合シート１は、厚さ０．２mm以下の溶融亜鉛めっき鋼板１１の裏面に、SBS(スチレンブタジエンスチレンブロック共重合体）系熱可塑性合成ゴムとストレートアスファルト、軟化剤及び合成樹脂などからなる粘着材層１２を厚さ０．３〜１．０ｍｍに塗布積層して構成される。
また、本実施形態の剥離紙付き目地被着用複合シート１’は、前記粘着材層１２の表面に剥離フィルムあるいは剥離紙からなる剥離材層１３を設けて構成される。
使用に際しては、剥離材層１３を剥がして、粘着材層１３を露出させ、その露出面を
、躯体コンクリート（５）面のアスファルト防水層（４）上に載置された保護コンクリート（２）と他の隣接する保護コンクリート（２）との間の伸縮目地（３）の上部面近傍に押し付けて被着する。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
As shown in FIG. 1, the jointed composite sheet 1 of the present embodiment has an SBS (styrene butadiene styrene block copolymer) thermoplastic synthetic rubber on the back surface of a hot dip galvanized steel sheet 11 having a thickness of 0.2 mm or less. And an adhesive layer 12 made of straight asphalt, a softening agent, a synthetic resin, and the like is applied and laminated to a thickness of 0.3 to 1.0 mm.
Moreover, the joint sheet 1 ′ with release paper of the present embodiment is configured by providing a release material layer 13 made of a release film or release paper on the surface of the pressure-sensitive adhesive layer 12.
In use, the peeling material layer 13 is peeled off to expose the adhesive material layer 13, and the exposed surface of the protective concrete (2) placed on the asphalt waterproofing layer (4) of the frame concrete (5) surface and It adheres by pressing near the upper surface of the expansion joint (3) between the other adjacent protective concrete (2).
また、粘着材層１２の製造においては、ＳＢＳのほかに、再生ブチルゴム単独若しくはＳＢＳと再生ブチルゴムの混合物をストレートアスファルトに添加してもよい。
本実施形態においては、鋼板１１として、厚さ０．１１ｍｍの溶融亜鉛めっき鋼板を用いた。
鋼板１１に溶融亜鉛めっき鋼板を採用すると、耐食性が大幅に向上する。また、亜鉛とアルミニウムを含有する合金めっき鋼板を使用すると、更に耐食性が向上する。
鋼板（１１）の厚みが０．２ｍｍ以下が好ましく、０．２ｍｍを超えると、剛性が高くなり過ぎ、加工性が悪くなり、さらにロール状製品となす場合、ロール状に巻くことが困難になる。
鋼板１１の厚みと目地被着用複合シート１の性能の関係を表１に示す。
In the present embodiment, a hot-dip galvanized steel sheet having a thickness of 0.11 mm is used as the steel sheet 11.
When a hot dip galvanized steel sheet is adopted as the steel sheet 11, the corrosion resistance is greatly improved. Further, when an alloy plated steel sheet containing zinc and aluminum is used, the corrosion resistance is further improved.
The thickness of the steel plate (11) is preferably 0.2 mm or less, and if it exceeds 0.2 mm, the rigidity becomes too high, the workability deteriorates, and further, when it becomes a roll-shaped product, it becomes difficult to wind in a roll shape. .
Table 1 shows the relationship between the thickness of the steel plate 11 and the performance of the joint wearing composite sheet 1.
伸縮目地被着用複合シート１の粘着層１２の厚さは、０．３〜１．０ｍｍが適当であり、０．３ｍｍ未満では、保護コンクリート２表面の凹凸面へのなじみが悪く、接着性が完全には確保されないとともに、目地の伸縮の動きを緩和する効果が薄れる。
また１．０ｍｍを超えると、厚くなりすぎ、塗膜防水工法の場合、特に最上部の防水材層６に段差が生じ易くなる。
The thickness of the pressure-sensitive adhesive layer 12 of the stretch joint-attached composite sheet 1 is suitably 0.3 to 1.0 mm. If the thickness is less than 0.3 mm, the conformity to the uneven surface of the protective concrete 2 surface is poor, and the adhesiveness is low. It is not completely secured, and the effect of relaxing the expansion and contraction movement of the joint is diminished.
On the other hand, if it exceeds 1.0 mm, it becomes too thick, and in the case of the coating film waterproofing method, a step is likely to be generated particularly in the uppermost waterproof material layer 6.
伸縮目地被着用複合シート１の幅については、多くの場合、保護コンクリート２、２間の伸縮目地３の幅が２０ｍｍ程度あるため、伸縮目地被着用複合シート１の幅は５〜１５ｃｍであることが、施工が容易でコストも低くい点及び目地部伸縮による動きを緩和できる点で好ましい。 About the width | variety of the expansion joint joint composite sheet 1, since the width of the expansion joint 3 between the protective concrete 2 and 2 is about 20 mm in many cases, the width | variety of the expansion joint composite sheet 1 is 5-15 cm However, it is preferable in that the construction is easy and the cost is low and the movement due to expansion and contraction of the joint portion can be mitigated.
[実施例１]
図２に、本発明実施例の複合目地用シート１を使用した、防水改修された屋根の防水構造の説明断面図を示す。
幅１０ｃｍ厚さ０．１１ｍｍの溶融亜鉛めっき鋼板１１に、厚さ０．５ｍｍのＳＢＳ添加により改質されたＳＢＳ改質アスファルトからなる粘着材層１２を積層して形成された、厚さ合計０．６１ｍｍの伸縮目地被着用複合シート１を、伸縮目地３を挟んで、両隣の保護コンクリート２、２の上縁面部に架設するごとくして被着して貼り付けた。
次に、上記伸縮目地被着用複合シート１と露出している保護コンクリート２の上面との全面にウレタン塗膜形成用防水剤を所定の工法により施工して防水材層６を設け、経過を観察した。
その結果、防水材層６の仕上げ面は施工当初平滑であり、また６ヶ月経過後も同様な平滑さを保っており、旧目地材からの化学的悪影響及び目地伸縮変形による影響も受けなかった。
[実施例２]
また、前記伸縮目地被着用複合シート１において、溶融亜鉛めっき鋼板１１に換えて、幅１５ｃｍ、厚さ０．１５ｍｍの溶融亜鉛―５％アルミニウム合金めっきした合金鋼板を用いて試験を行った。その結果、試験データはサビの発生に関して実施例１よりも良好であった。
[Example 1]
FIG. 2 is an explanatory cross-sectional view of a waterproof structure of a roof that has been waterproofed and modified using the composite joint sheet 1 of the embodiment of the present invention.
A total thickness of 0 formed by laminating an adhesive layer 12 made of SBS-modified asphalt modified by adding SBS having a thickness of 0.5 mm to a hot-dip galvanized steel sheet 11 having a width of 10 cm and a thickness of 0.11 mm. A 61 mm-thick stretch joint-attached composite sheet 1 was attached and pasted as if it were installed on the upper edge surface portions of the adjacent protective concrete 2 and 2 with the stretch joint 3 sandwiched therebetween.
Next, a waterproofing agent layer 6 is provided by applying a waterproofing agent for forming a urethane coating film by a predetermined construction method on the entire surface of the composite sheet 1 to be applied to the stretch joint and the exposed upper surface of the protective concrete 2, and the progress is observed. did.
As a result, the finished surface of the waterproof material layer 6 was smooth at the beginning of the construction, and the same smoothness was maintained even after the lapse of 6 months, and was not affected by chemical adverse effects from the old joint material and joint expansion / contraction deformation. .
[Example 2]
Further, in the stretch joint-attached composite sheet 1, a test was performed using an alloy steel plate plated with a hot-dip zinc-5% aluminum alloy having a width of 15 cm and a thickness of 0.15 mm instead of the hot-dip galvanized steel plate 11. As a result, the test data was better than Example 1 with respect to the occurrence of rust.
[実施例３]
実施例１の溶融亜鉛めっき鋼板１１に換えて、溶融亜鉛めっきを施さない単なる鋼板を用いて製造された伸縮目地被着用複合シート１を使用して実験を行った。
その結果、耐食性において流れサビが発生して問題が生じたが、その他試験データは実施例１と同じであった。
[Example 3]
In place of the hot dip galvanized steel sheet 11 of Example 1, an experiment was performed using the stretch joint-attached composite sheet 1 manufactured using a simple steel sheet not subjected to hot dip galvanization.
As a result, flow rust was generated in the corrosion resistance, causing problems, but the other test data was the same as in Example 1.
[比較例１]
厚さ０．１ｍｍ、幅１００ｍｍのアルミニウム板の裏面に、厚さ０．１ｍｍのアクリル系粘着材層を積層してなる複合シートを使用して、実施例１と同様の試験を行った。
その結果、防水施工後の目地部上面の防水材層に凹みが生じ、目地の伸縮への追従性が不可であった。また、腐食が発生し、耐食性に問題が生じた。
なお、目地から防水材層へ可塑剤が移行することはなかった。
[Comparative Example 1]
The same test as in Example 1 was performed using a composite sheet obtained by laminating an acrylic adhesive layer having a thickness of 0.1 mm on the back surface of an aluminum plate having a thickness of 0.1 mm and a width of 100 mm.
As a result, the waterproof material layer on the upper surface of the joint portion after the waterproof construction was dented, and the followability to expansion and contraction of the joint was impossible. Moreover, corrosion occurred and a problem occurred in the corrosion resistance.
Note that the plasticizer did not migrate from the joint to the waterproof material layer.
[比較例２]
厚さ０．６ｍｍ、幅１００ｍｍのスパンボンド不織布（すなわち、ＰＰ（ポリプロピレン）やＰＥＴ（ポリエステル）などの樹脂を溶融した繊維を、織らずにシート状にした不織布）の裏面に、ブチルゴム系粘着材層を積層してなる複合シートを使用して、実施例１と同様の試験を行った。
その結果、防水施工後の目地部上面の防水材層に凹みが生じ、目地の伸縮への追従性が不可であった。また、目地から防水材層へ可塑剤が移行した。
なお、腐食は発生せず、耐食性に問題はなかった。
[Comparative Example 2]
A butyl rubber-based adhesive on the back of a spunbonded nonwoven fabric with a thickness of 0.6 mm and a width of 100 mm (that is, a nonwoven fabric in which fibers made by melting a resin such as PP (polypropylene) or PET (polyester) are not woven). The same test as in Example 1 was performed using a composite sheet formed by laminating layers.
As a result, the waterproof material layer on the upper surface of the joint portion after the waterproof construction was dented, and the followability to expansion and contraction of the joint was impossible. Moreover, the plasticizer moved from the joint to the waterproof material layer.
Corrosion did not occur and there was no problem with corrosion resistance.
以上の試験結果を表２にまとめて示す。
すなわち、各シートの構成は以下のとおりである。
Ａ−１（実施例１のシート）：
ＳＢＳ改質アスファルト系粘着材層＝厚さ０．５ｍｍ、
溶融亜鉛めっき鋼板＝厚さ０．１１ｍｍ、幅１００ｍｍ。
Ａ−２（実施例２のシート）：
ＳＢＳ改質アスファルト系粘着材層＝厚さ０．５ｍｍ、
溶融亜鉛−５％アルミニウム合金めっき鋼板＝厚さ０．１１ｍｍ、幅１００ｍｍ。
Ｂ（実施例３のシート）：
ＳＢＳ改質アスファルト粘着材層＝厚さ０．５ｍｍ、
鋼板（めっきなし）＝厚さ０．１５ｍｍ、幅１００ｍｍ。
Ｃ（比較例１のシート）：
アクリル系粘着材層＝厚さ０．１ｍｍ、
アルミニウム板＝厚さ０．１ｍｍ、幅１００ｍｍ。
Ｄ（比較例２のシート）：
ブチルゴム系粘着材層＝厚さ０５ｍｍ、
スパンボンド不織布＝厚さ０．３ｍｍ、幅１００ｍｍ。
The above test results are summarized in Table 2.
That is, the configuration of each sheet is as follows.
A-1 (Sheet of Example 1):
SBS modified asphalt adhesive layer = thickness 0.5mm,
Hot dip galvanized steel sheet = thickness 0.11 mm, width 100 mm.
A-2 (Sheet of Example 2):
SBS modified asphalt adhesive layer = thickness 0.5mm,
Hot-dip zinc-5% aluminum alloy plated steel sheet = thickness 0.11 mm, width 100 mm.
B (Sheet of Example 3):
SBS modified asphalt adhesive layer = thickness 0.5mm,
Steel plate (no plating) = thickness 0.15 mm, width 100 mm.
C (sheet of Comparative Example 1):
Acrylic pressure-sensitive adhesive layer = thickness 0.1 mm,
Aluminum plate = thickness 0.1 mm, width 100 mm.
D (sheet of Comparative Example 2):
Butyl rubber adhesive layer = thickness 05mm,
Spunbond nonwoven fabric = thickness 0.3 mm, width 100 mm.
１：目地被着用複合シート、
１’：剥離材付き目地被着用複合シート、
１１：鋼板、
１２：粘着材層、
１３：剥離材層、
２：保護コンクリート、
３：伸縮目地、
４：防水層、
５：躯体コンクリート、
６：防水材層、
1: Joint sheet wearing composite sheet,
1 ': Composite sheet with a release material,
11: steel plate,
12: Adhesive layer
13: release material layer,
2: Protective concrete,
3: expansion joint,
4: Waterproof layer,
5: concrete frame,
6: waterproof material layer,
Claims (11)
Other protective concrete (2) in which the frame concrete (5), the asphalt waterproofing layer (4), the protective concrete (2), and the waterproofing material layer (6) are sequentially laminated and are adjacent to the protective concrete (2) The steel sheet (11) according to any one of claims 1 to 8, which has a thickness of 0.2 mm or less, in the vicinity of the upper surface of the expansion joint (3). Waterproofing of a waterproof and refurbished roof characterized in that a composite sheet (1) having a stretchable joint applied to a back surface of which an adhesive material layer (12) having a thickness of 0.3 to 1.0 mm is laminated is attached. Construction.
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