CARBONATION CURING METHOD FOR PRECAST CONCRETE MEMBER

• Main Authors: SHOJI AKIO, WATASE HIROSHI, AZUMA YOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 29.11.2023
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; PERFORMING OPERATIONS; REFRACTORIES; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; WORKING CEMENT, CLAY, OR STONE

To provide a carbonation curing method for concrete members that can be performed even at a factory or a construction site and enables CO2 to be efficiently immobilized using a simple facility.SOLUTION: In a carbonation curing method for precast concrete members, the precast concrete members are covered with an airtight curing sheet 2, and a gas including carbon dioxide is blown into the curing sheet 2 to produce calcium carbonate in the precast concrete members 1, immobilizing carbon dioxide. The curing sheet 2 is a heat-retentive sheet 2' with insulation capabilities. The heat of hydration of the precast concrete members 1 is used to promote the calcium carbonate producing reaction.SELECTED DRAWING: Figure 1 【課題】工場や建設現場でも実行可能な簡易な施設で効率的にＣＯ2を固定化させることができるコンクリート部材の炭酸化養生方法を提供する。【解決手段】プレキャストコンクリート部材の炭酸化養生方法において、気密性を有する養生シート２でプレキャストコンクリート部材を覆い、養生シート２内に二酸化炭素を含むガスを吹き込んでプレキャストコンクリート部材１中に炭酸カルシウムを生成して二酸化炭素を固定化する。また、養生シート２は断熱性を有する保温シート２’であり、プレキャストコンクリート部材１の水和熱で炭酸カルシウムを生成する反応を促進する。【選択図】図１