REPAIR METHOD OF CYLINDRICAL CONCRETE STRUCTURE

PROBLEM TO BE SOLVED: To provide a repair method of a cylindrical concrete structure capable of providing strength equal to or more than initial strength by thickening of a range of not exceeding an initial thickness of a skeleton, and capable of also coping with urgency by easily executing repair w...

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Bibliographic Details
Main Authors IIDA KAZUKI, HOSAKA AKIRA, NAKANO MASAAKI, HAYASHI ETSURO, IMAZAKI YUJI, IIJIMA YUTAKA
Format Patent
LanguageEnglish
Japanese
Published 21.04.2016
Subjects
CESSPOOLS
EMBANKMENTS
EXCAVATIONS
FIXED CONSTRUCTIONS
FOUNDATIONS
HYDRAULIC ENGINEERING
SEWERAGE
SEWERS
SOIL SHIFTING
UNDERGROUND OR UNDERWATER STRUCTURES
WATER SUPPLY
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Summary:PROBLEM TO BE SOLVED: To provide a repair method of a cylindrical concrete structure capable of providing strength equal to or more than initial strength by thickening of a range of not exceeding an initial thickness of a skeleton, and capable of also coping with urgency by easily executing repair work.SOLUTION: In a repair method of a cylindrical concrete structure, a deteriorated layer of concrete is removed over the whole periphery, and a repair layer is formed by coating a resin-based repair material having tensile strength of 8.0 N/mmor more, adhesive strength of 2.0 N/mmor more, compressive strength of 45.0 N/mmor more and an elastic modulus of 3200 N/mmor more, on a sound concrete surface after removing the deteriorated layer, and thereby, a breaking load of the repair layer is enlarged more than a concrete layer, and thus, the breaking load equal to or more than an initial breaking load is provided as a breaking load of the cylindrical concrete structure after repair by thickening of a range where thickening by the repair layer formed by coating the resin-based repair material on a concrete surface after removing the deteriorated layer of the concrete, does not exceed an initial thickness of the cylindrical concrete structure.SELECTED DRAWING: None 【課題】躯体の初期厚を超えない範囲の増肉で、初期強度と同等以上の強度が得られ、さらには補修作業を容易に行え緊急性に対応できる円筒形コンクリート構造物の補修方法を提供する。【解決手段】円筒形コンクリート構造物の補修方法であって、コンクリートの劣化層を全周に渡って除去し、劣化層除去後の健全なコンクリート面に、引張強度８．０Ｎ／ｍｍ２以上、付着強度２．０Ｎ／ｍｍ２以上、圧縮強度４５．０Ｎ／ｍｍ２以上、弾性係数３２００Ｎ／ｍｍ２以上の樹脂系補修材を塗布して補修層を形成することにより、補修層の破壊荷重をコンクリート層に比べて大きくし、これにより、コンクリートの劣化層を除去した後のコンクリート面に樹脂系補修材を塗布して形成した補修層による増肉が円筒形コンクリート構造物の初期厚を超えない範囲の増肉で、補修後の円筒形コンクリート構造物の破壊荷重として初期破壊荷重と同等以上の破壊荷重が得られるようにした。【選択図】なし
Bibliography:Application Number: JP20140184736