A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
REPAIR MATERIAL FOR CONCRETE STRUCTURE, AND REPAIR METHOD FOR CONCRETE STRUCTURE
PROBLEM TO BE SOLVED: To provide a repair material for repairing a concrete structure of which a design strength is 45 N/mmor less and a repair method for the concrete structure of which a design strength is 45 N/mmor less, the repair material offering integrity between existing and new materials and even higher strength of the structure when used for a repair after removing a deteriorated part of the concrete structure of which the design strength is 45 N/mmor less.SOLUTION: A repair material for a concrete structure contains a coarse aggregate of a unit aggregate quantity between 200 and 400 L/m3 that passes through a sieve with a nominal opening of 11.2 mm at 95 mass% or more, water of a unit water quantity between 170 and 230 L/m3, a hydraulic material, and a fine aggregate. A contraction coefficient of the repair material is to be 600 μ or less, at a material age of 91 days cured under 20°C and a relative humidity of 60%, after setting a distance between edge surfaces on inner sides of a gauge plug 48 hours after concrete casting, pursuant to the JIS A 1129: Methods of measurement for length change of mortar and concrete Part 3: Method with dial gauge.SELECTED DRAWING: None
【課題】設計基準強度が４５Ｎ／ｍｍ２以下のコンクリート構造物の劣化部分除去後の成形し直しに用いると、新旧の材料の一体性に優れ、補修後の構造物がより高い強度が得られる、設計基準強度が４５Ｎ／ｍｍ２以下のコンクリート構造物補修用の補修材を提供する。また、設計基準強度が４５Ｎ／ｍｍ２以下のコンクリート構造物補修用の補修方法を提供する。【解決手段】単位粗骨材量２００〜４００Ｌ／ｍ３の公称目開き１１．２ｍｍのふるい９５質量％以上通過する粗骨材と、単位水量１７０〜２３０Ｌ／ｍ３の水と、水硬性物質と、細骨材とを含有するコンクリート構造物補修用の補修材を、ＪＩＳ Ａ １１２９「モルタル及びコンクリートの長さ変化試験方法−第３部：ダイヤルゲージ法」に準じ、打ち込みから４８時間後に基長し、２０℃相対湿度６０％で養生した材齢９１日における収縮率が６００μ以下とした。【選択図】なし
REPAIR MATERIAL FOR CONCRETE STRUCTURE, AND REPAIR METHOD FOR CONCRETE STRUCTURE
PROBLEM TO BE SOLVED: To provide a repair material for repairing a concrete structure of which a design strength is 45 N/mmor less and a repair method for the concrete structure of which a design strength is 45 N/mmor less, the repair material offering integrity between existing and new materials and even higher strength of the structure when used for a repair after removing a deteriorated part of the concrete structure of which the design strength is 45 N/mmor less.SOLUTION: A repair material for a concrete structure contains a coarse aggregate of a unit aggregate quantity between 200 and 400 L/m3 that passes through a sieve with a nominal opening of 11.2 mm at 95 mass% or more, water of a unit water quantity between 170 and 230 L/m3, a hydraulic material, and a fine aggregate. A contraction coefficient of the repair material is to be 600 μ or less, at a material age of 91 days cured under 20°C and a relative humidity of 60%, after setting a distance between edge surfaces on inner sides of a gauge plug 48 hours after concrete casting, pursuant to the JIS A 1129: Methods of measurement for length change of mortar and concrete Part 3: Method with dial gauge.SELECTED DRAWING: None
【課題】設計基準強度が４５Ｎ／ｍｍ２以下のコンクリート構造物の劣化部分除去後の成形し直しに用いると、新旧の材料の一体性に優れ、補修後の構造物がより高い強度が得られる、設計基準強度が４５Ｎ／ｍｍ２以下のコンクリート構造物補修用の補修材を提供する。また、設計基準強度が４５Ｎ／ｍｍ２以下のコンクリート構造物補修用の補修方法を提供する。【解決手段】単位粗骨材量２００〜４００Ｌ／ｍ３の公称目開き１１．２ｍｍのふるい９５質量％以上通過する粗骨材と、単位水量１７０〜２３０Ｌ／ｍ３の水と、水硬性物質と、細骨材とを含有するコンクリート構造物補修用の補修材を、ＪＩＳ Ａ １１２９「モルタル及びコンクリートの長さ変化試験方法−第３部：ダイヤルゲージ法」に準じ、打ち込みから４８時間後に基長し、２０℃相対湿度６０％で養生した材齢９１日における収縮率が６００μ以下とした。【選択図】なし
REPAIR MATERIAL FOR CONCRETE STRUCTURE, AND REPAIR METHOD FOR CONCRETE STRUCTURE
コンクリート構造物用補修材およびコンクリート構造物の補修方法
MARUTA HIROSHI (author) / HAMANAKA AKINORI (author)
2016-07-11
Patent
Electronic Resource
Japanese
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