A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
NEUTRON SHIELDING CONCRETE AND PRODUCING METHOD THEREFOR
PROBLEM TO BE SOLVED: To provide a neutron shielding concrete which contains boron-containing minerals produced from natural evaporite deposits as an aggregate and is cured using various types of ordinary Portland cement or the like and to provide a producing method therefor.SOLUTION: Ulexite and sassolite contained in minerals in an evaporite sedimentary deposit are pre-removed as they are easily soluble in water, and colemanite and hylgadite ores are visually sorted and manually picked from the evaporite sedimentary deposit. The acquired colemanite and hylgadite ores are crushed to produce a coarse aggregate having particle diameters in a range of approximately several tenths of a mm to 2 cm. Colemanite and hylgadite particles having diameters no greater than 0.6 mm are then removed as they are highly soluble in water, and resultant shortage of a fine aggregate is alternatively filled by water-insoluble datolite, after which the coarse aggregate is mixed with an ordinary Portland cement and water to be kneaded to produce a neutron-shielding concrete.
【課題】天然のエバポライト型鉱床から産する含硼素鉱物を骨材として用いながらも、普通ポルトランドセメント等の各種のセメントを使用して固めるめることができるようにした中性子遮蔽コンクリートとその製造方法を提供する。【解決手段】エバポライト型堆積鉱床の鉱物に含まれるユーレキサイトとサッソライトは水に溶け易いので予め除き、エバポライト型堆積鉱床からコレマナイトやヒルガダイト塊を目視選別し手選した。採取したコレマナイトやヒルガダイト塊を破砕し、粒径が０．数ｍｍ〜２ｃｍ程度のものを粗骨材とした。コレマナイトやヒルガダイトの粒径０．６ｍｍ以下のものは水溶性が高いので除去し、代替する不足の細骨材を水に不溶のダトライトで補足し、上記粗骨材と、普通ポルトランドセメントと水を加えて混練し、中性子コンクリートを得る。【選択図】なし
NEUTRON SHIELDING CONCRETE AND PRODUCING METHOD THEREFOR
PROBLEM TO BE SOLVED: To provide a neutron shielding concrete which contains boron-containing minerals produced from natural evaporite deposits as an aggregate and is cured using various types of ordinary Portland cement or the like and to provide a producing method therefor.SOLUTION: Ulexite and sassolite contained in minerals in an evaporite sedimentary deposit are pre-removed as they are easily soluble in water, and colemanite and hylgadite ores are visually sorted and manually picked from the evaporite sedimentary deposit. The acquired colemanite and hylgadite ores are crushed to produce a coarse aggregate having particle diameters in a range of approximately several tenths of a mm to 2 cm. Colemanite and hylgadite particles having diameters no greater than 0.6 mm are then removed as they are highly soluble in water, and resultant shortage of a fine aggregate is alternatively filled by water-insoluble datolite, after which the coarse aggregate is mixed with an ordinary Portland cement and water to be kneaded to produce a neutron-shielding concrete.
【課題】天然のエバポライト型鉱床から産する含硼素鉱物を骨材として用いながらも、普通ポルトランドセメント等の各種のセメントを使用して固めるめることができるようにした中性子遮蔽コンクリートとその製造方法を提供する。【解決手段】エバポライト型堆積鉱床の鉱物に含まれるユーレキサイトとサッソライトは水に溶け易いので予め除き、エバポライト型堆積鉱床からコレマナイトやヒルガダイト塊を目視選別し手選した。採取したコレマナイトやヒルガダイト塊を破砕し、粒径が０．数ｍｍ〜２ｃｍ程度のものを粗骨材とした。コレマナイトやヒルガダイトの粒径０．６ｍｍ以下のものは水溶性が高いので除去し、代替する不足の細骨材を水に不溶のダトライトで補足し、上記粗骨材と、普通ポルトランドセメントと水を加えて混練し、中性子コンクリートを得る。【選択図】なし
NEUTRON SHIELDING CONCRETE AND PRODUCING METHOD THEREFOR
中性子遮蔽コンクリートとその製造方法
KATO HIROAKI (author) / ARAI HIROYUKI (author) / ONOBE RYOICHI (author) / HASHIMOTO HIROHIDE (author) / ITO YUJI (author) / MARU AKIO (author)
2015-07-06
Patent
Electronic Resource
Japanese
Fast Neutron Shielding by Ordinary Concrete
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