JP2012207375A - 複合防水構造体の施工方法及び複合防水構造体 - Google Patents
複合防水構造体の施工方法及び複合防水構造体 Download PDFInfo
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Abstract
【解決手段】骨材、改質アスファルト、不織布、改質アスファルト、合成樹脂フィルムの順で積層し、一体化したアスファルト系防水シートであって、骨材は、骨材全体に対し、粒子径が2.0mm以上の粒子の質量割合を5質量%以下含み、且つ、粒子径が0.6mm以上であり且つ2.0mm未満の粒子の質量割合を70〜100質量%含み、アスファルト系防水シートを用いて、合成樹脂フィルム面をトーチバーナーで炙り、該アスファルト系防水シートの炙り面を構造物に敷設する敷設工程と、アスファルト系防水シートの骨材面に、アクリル樹脂エマルジョンを塗布し、硬化させて、アクリル樹脂塗膜層を形成する塗布硬化工程と、を有する複合防水構造体の施工方法。
【選択図】図1
Description
本発明の複合防水構造体の施工方法の好適な実施形態を以下に説明する。本実施形態の複合防水構造体の施工方法は、トーチバーナーで合成樹脂フィルム面を炙ったアスファルト系防水シートの炙り面を構造物に敷設する敷設工程と、アスファルト系防水シートの骨材面に水性アクリル樹脂エマルジョンを塗布し、硬化させて、アクリル樹脂塗膜層を形成する塗布硬化工程とを有する複合防水構造体の施工方法である。また、アスファルト系防水シートは、特定の粒子径を有する骨材、改質アスファルト、不織布、改質アスファルト、合成樹脂フィルムの順で積層一体化したアスファルト系防水シートであれば特に制限なく使用できるが、JIS A 6013「改質アスファルトルーフィング」に適合したものが好ましい。
本実施形態に係るアスファルト系防水シートは、骨材、改質アスファルト、不織布、改質アスファルト、合成樹脂フィルムの順で積層一体化したアスファルト系防水シートである。
酸化重合したものである。ストレートアスファルトの軟化点やせん断力を改善するために必要に応じて用いることができる。針入度(25℃)は、好ましくは0以上、且つ40以下であり、さらに好ましくは5を超え、且つ30以下であり、特に好ましくは10を超え、且つ20以下である。
1)不織布
・ポリエステル製不織布(目付:140g/m2)
2)改質アスファルト
・改質アスファルト(ストレートアスファルトをポリオレフィン系合成樹脂で改質、粘度(190℃):4500mPa・s、軟化点:152℃、針入度(25℃):25)
3)骨材
・骨材A(スレート砂、粒子径2.0mm以上:1.8質量%、粒子径0.6mm以上であり且つ2.0mm未満:91.4質量%、粒子径0.15mm以上であり且つ0.6mm未満:6.8質量%)
・骨材B(珪砂、粒子径2.0mm以上:0.0質量%、粒子径0.6mm以上であり且つ2.0mm未満:0.0質量%、粒子径0.15mm以上であり且つ0.6mm未満:97.3質量%)
4)合成樹脂フィルム
・ポリエチレン樹脂フィルム(厚み10μm)
5)水性アクリル樹脂エマルジョン
・樹脂A(亜細亜工業社製、スチレン/(メタ)クリル酸誘導体共重合体エマルジョン、ガラス転移温度(Tg):−33℃)
・樹脂B(スズカファイン社製、スチレン/(メタ)クリル酸誘導体共重合体エマルジョン、ガラス転移温度(Tg):10℃)
・樹脂C(亜細亜工業社製、スチレン/(メタ)クリル酸誘導体共重合体エマルジョン、ガラス転移温度(Tg):20℃)
幅1.0m、長さ1.5mの不織布を中間層(基材)として、190℃の改質アスファルトに含浸し、4.0mmの厚みになるよう調製した。その次に、片面に合成樹脂フィルムを、反対側の面に骨材A(単位面積当たりの骨材質量:1.10kg/m2)を張合わせ、アスファルト系防水シートAを得た。
23℃恒温室にて、表1に示すように、上記アスファルト系防水シートA及びBに、水性アクリル樹脂エマルジョン(樹脂A、樹脂B及び樹脂C)をそれぞれ2回ずつ所定量塗布し、6時間(6h)気中養生した後に水中に浸漬する条件と、4日間(4d)気中養生した後に水中に浸漬する条件にて、24時間(24h)後及び48時間(48h)後の表面状態を目視及び指触にて確認した。
23℃恒温室にて、表1に示すように、上記アスファルト系防水シートA及びBに、水性アクリル樹脂エマルジョン(樹脂A、樹脂B及び樹脂C)をそれぞれ2回ずつ所定量塗布し、6時間気中養生した後、ベントナイト試薬(ベントナイト:炭カル:水(蒸留水)=100:200:800)をアクリル樹脂塗膜層の上に100mmφ(10g)塗布し、60℃乾燥機中で養生する。24時間毎に蒸留水を散布し、7回繰り返した後(60℃、7サイクル)の表面状態を目視にて確認した。
31: 施工面
32: アスファルト系防水シート
33: 短辺方向の端部
34: 長辺方向の端部
35: 施工面の側壁
36: 水性アクリル樹脂エマルジョン
Claims (3)
- 骨材、改質アスファルト、不織布、改質アスファルト、合成樹脂フィルムの順で積層し、一体化したアスファルト系防水シートであって、
前記骨材は、骨材全体に対し、粒子径が2.0mm以上の粒子の質量割合を5質量%以下含み、且つ、粒子径が0.6mm以上であり且つ2.0mm未満の粒子の質量割合を70〜100質量%含み、
前記アスファルト系防水シートを用いて、前記合成樹脂フィルム面をトーチバーナーで炙り、該アスファルト系防水シートの炙り面を構造物に敷設する敷設工程と、
前記アスファルト系防水シートの前記骨材面に、アクリル樹脂エマルジョンを塗布し、硬化させて、アクリル樹脂塗膜層を形成する塗布硬化工程と、を有する複合防水構造体の施工方法。 - 前記合成樹脂フィルムは、ポリオレフィン樹脂フィルムである請求項1に記載の複合防水構造体の施工方法。
- 請求項1又は請求項2に記載の施工方法により得られる複合防水構造体。
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Cited By (3)
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JP3194555U (ja) * | 2014-09-17 | 2014-11-27 | 田島ルーフィング株式会社 | ホワイトルーフィング |
CN113427848A (zh) * | 2020-03-23 | 2021-09-24 | 北京世纪洪雨科技有限公司 | 一种抗流挂橡胶沥青防水卷材及施工方法 |
CN115012536A (zh) * | 2022-06-27 | 2022-09-06 | 潍坊市宇虹防水材料(集团)有限公司 | 一种固化反应型柔性防水抗腐蚀性高分子防水卷材 |
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JPH073961A (ja) * | 1993-06-22 | 1995-01-06 | Tajima Roofing Co Ltd | ポリマー改質アスファルトルーフィングとその製法 |
JPH09291656A (ja) * | 1996-04-25 | 1997-11-11 | Nisshin Kogyo Kk | トーチ防水工法 |
JPH09300521A (ja) * | 1996-05-10 | 1997-11-25 | A R Center:Kk | 無機長繊維強化防水層構造およびその形成方法 |
JP2010106552A (ja) * | 2008-10-30 | 2010-05-13 | Ube Ind Ltd | 遮熱性防水シート |
JP2010261212A (ja) * | 2009-05-07 | 2010-11-18 | Nanao Kogyo Kk | アスファルトルーフィングとこれを用いた屋根構造 |
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JPH073961A (ja) * | 1993-06-22 | 1995-01-06 | Tajima Roofing Co Ltd | ポリマー改質アスファルトルーフィングとその製法 |
JPH09291656A (ja) * | 1996-04-25 | 1997-11-11 | Nisshin Kogyo Kk | トーチ防水工法 |
JPH09300521A (ja) * | 1996-05-10 | 1997-11-25 | A R Center:Kk | 無機長繊維強化防水層構造およびその形成方法 |
JP2010106552A (ja) * | 2008-10-30 | 2010-05-13 | Ube Ind Ltd | 遮熱性防水シート |
JP2010261212A (ja) * | 2009-05-07 | 2010-11-18 | Nanao Kogyo Kk | アスファルトルーフィングとこれを用いた屋根構造 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3194555U (ja) * | 2014-09-17 | 2014-11-27 | 田島ルーフィング株式会社 | ホワイトルーフィング |
CN113427848A (zh) * | 2020-03-23 | 2021-09-24 | 北京世纪洪雨科技有限公司 | 一种抗流挂橡胶沥青防水卷材及施工方法 |
CN115012536A (zh) * | 2022-06-27 | 2022-09-06 | 潍坊市宇虹防水材料(集团)有限公司 | 一种固化反应型柔性防水抗腐蚀性高分子防水卷材 |
CN115012536B (zh) * | 2022-06-27 | 2022-11-15 | 潍坊市宇虹防水材料(集团)有限公司 | 一种固化反应型柔性防水抗腐蚀性高分子防水卷材 |
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