CURING DELAY IMPROVEMENT METHOD OF CONCRETE FOR NEUTRON SHIELD, AND CONCRETE FOR NEUTRON SHIELD MANUFACTURED BY THE SAME

• Main Authors: OKUNO KOICHI, SUZUKI YOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 26.01.2017
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DECONTAMINATION ARRANGEMENTS THEREFOR; LIME, MAGNESIA; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; REFRACTORIES; SLAG; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To secure a productivity substantially equivalent to typical concrete that does not contain a boron-containing material, by improving the curing delay of concrete for neutron shield.SOLUTION: In the curing delay improvement method of concrete for neutron shield, in a process of curing the concrete, by adding a compound of calcium silicate hydrate to the concrete while controlling the curing temperature of the concrete in a predetermined temperature range, the hydration reaction of the concrete is promoted.SELECTED DRAWING: Figure 1 【課題】中性子遮蔽用コンクリートの硬化遅延を改善し、ホウ素含有素材を含まない一般的なコンクリートと略同等の生産性を確保する。【解決手段】この中性子遮蔽用コンクリートの硬化遅延改善方法では、コンクリートを養生する過程で、コンクリートの養生温度を所定の温度範囲に制御しつつ、コンクリートにカルシウムシリケート水和物の化合物を添加することにより、コンクリートの水和反応を促進する。【選択図】図１