JP4442808B2 - 建物屋上防水層の劣化診断方法 - Google Patents
建物屋上防水層の劣化診断方法 Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/006—Provisions for detecting water leakage
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Description
Y=P×X Q
(但し、Y:電位、P:一定距離(X=1)離れた位置での電位差、X:基準電極と測定電極との距離、Q:電位減衰率)
で近似することにより基準電極近傍での電位減衰率を求め、該電位減衰率と透水性との相関から基準電極近傍での防水層の劣化度を評価する。また、多数の電極を用いて4極法により体積抵抗率の分布を求め、その体積抵抗率と透水性との相関から測定領域近傍の劣化度を評価する方法、建物屋上に配列した電極を内部電流電極とし、建物本体もしくは地盤に外部電流電極を設置して、内部電流電極と外部電流電極とで防水層上下間の通電電流値もしくは体積抵抗率を求め、その通電電流値もしくは体積抵抗率と透水性との相関から測定領域近傍の劣化度を評価する方法を組み合わせて総合的に評価することもできる。
Y=P×XQ
で近似し、電位差Pもしくは電位減衰率Qを求める。電位差Pは、一定距離(X=1)離れた位置での電位差を意味している。電位差Pに対する透水率の関係を図5のAに示し、電位減衰率Qに対する透水率の関係を図5のBに示す。透水率が大きければ、発生する電位差は小さいし、電位は急激に減少する。逆に透水率が小さければ、発生する電位差は大きく、電位は減少し難い。従って、図5に示すように、電位差Pの大小によっても、あるいは電位減衰率Qの大小によっても、透水率が求まる。前記のような透水率と劣化度との関係から、例えば、透水率が0.1〜0.2程度の場合を劣化度1(必要に応じて部分補修を行う)、0.2〜0.6程度の場合を劣化度2(部分補修又は大規模補修を行う)、更に0.6程度以上の場合を劣化度3(原則として大規模補修を行う)というように、劣化度をランク分けできるから、電位差Pあるいは電位減衰率Qによって劣化度をランク分けできる。
12 保護層
20 屋根
22 アスファルト防水層
24 保護層
26 電極
28 端子ボックス
30 測定器
32 パーソナルコンピュータ
34 外部電流電極
Claims (3)
- 建物屋上防水層の上に、導電体層を介して多数の電極を仮設配列し、それらの電極を用いて電気的特性を求め、電気的特性と透水性との相関から非破壊で防水層の劣化度を評価する建物屋上防水層の劣化診断方法であって、
多数の電極のうちの任意の1個を内部電流電極、別の1個を基準電極、該基準電極を含む測線上の他の複数個を測定電極とし、建物本体もしくは地盤に外部電流電極を設置して、内部電流電極と外部電流電極との間で通電し、基準電極と各測定電極の間の電位差を測定することにより基準電極からの距離的な電位減衰曲線を求め、その電位減衰曲線を、
Y=P×X Q
(但し、Y:電位、P:一定距離(X=1)離れた位置での電位差、X:基準電極と測定電極との距離、Q:電位減衰率)
で近似することにより基準電極近傍での電位減衰率を求め、該電位減衰率と透水性との相関から基準電極近傍での防水層の劣化度を評価することを特徴とする建物屋上防水層の劣化診断方法。 - 基準電極位置を変えて電位減衰率を求め、建物屋上防水層のほぼ全面にわたって劣化度を求めて平面的な劣化度分布図を作成し、それに基づき劣化度の大きな領域を部分的に補修可能とした請求項1記載の建物屋上防水層の劣化診断方法。
- 導電体層が、防水層上に敷いた砂層及び該砂層の上に載置されているコンクリート製の保護層である請求項1又は2記載の建物屋上防水層の劣化診断方法。
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JP2004085620A JP4442808B2 (ja) | 2004-03-23 | 2004-03-23 | 建物屋上防水層の劣化診断方法 |
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JP2004085620A JP4442808B2 (ja) | 2004-03-23 | 2004-03-23 | 建物屋上防水層の劣化診断方法 |
Publications (2)
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JP2005274242A JP2005274242A (ja) | 2005-10-06 |
JP4442808B2 true JP4442808B2 (ja) | 2010-03-31 |
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Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5199855B2 (ja) * | 2008-12-17 | 2013-05-15 | 三井ホーム株式会社 | 木造枠組壁 |
JP4900615B2 (ja) * | 2008-12-26 | 2012-03-21 | 独立行政法人土木研究所 | 地盤の破壊・崩壊予測方法 |
JP5603696B2 (ja) * | 2010-07-27 | 2014-10-08 | 株式会社 エバープロテクト | けい酸塩系表面含浸コンクリート保護材の施工の検査・確認方法およびそれに用いる検査装置 |
GB2527766B (en) * | 2014-06-30 | 2020-07-29 | Elcometer Ltd | Contamination meter |
JP7300417B2 (ja) * | 2020-04-28 | 2023-06-29 | 田島ルーフィング株式会社 | 漏水検知機能付き防水副資材、それを含む屋上防水構造物および漏水を検知する方法 |
CN114960769B (zh) * | 2022-05-26 | 2023-11-24 | 济南市市政工程设计研究院(集团)有限责任公司 | 一种地下室防水层结构、地下室墙体及建筑物 |
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