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A platform for research: civil engineering, architecture and urbanism
METHOD OF RECOVERING CEMENT RAW MATERIAL FROM WASTE CONCRETE
To provide a method of recovering a cement raw material less likely to be contaminated with aggregate, from waste concrete.SOLUTION: The method of recovering a cement raw material from waste concrete, includes a first step of crushing waste concrete, a second step of classifying the crushed waste concrete at a classification point where the cement paste content in fine granules is not less than 60 mass%, a third step of sorting the fine granules by dry-type gravity sorting into granules of a high specific gravity and granules of a low specific gravity, and a fourth step of recovering the granules of a low specific gravity.SELECTED DRAWING: None
【課題】廃コンクリートから骨材の混入が抑えられたセメント原料を回収する方法を提供すること。【解決手段】廃コンクリートを破砕する第１の工程と、廃コンクリートの破砕物を、細粒中のセメントペースト含有率が６０質量％以上となる分級点で分級する第２の工程と、細粒を乾式比重選別し、重比重物と軽比重物とに選別する第３の工程と、軽比重物を回収する第４の工程、を含む、廃コンクリートからのセメント原料回収方法。【選択図】なし
METHOD OF RECOVERING CEMENT RAW MATERIAL FROM WASTE CONCRETE
To provide a method of recovering a cement raw material less likely to be contaminated with aggregate, from waste concrete.SOLUTION: The method of recovering a cement raw material from waste concrete, includes a first step of crushing waste concrete, a second step of classifying the crushed waste concrete at a classification point where the cement paste content in fine granules is not less than 60 mass%, a third step of sorting the fine granules by dry-type gravity sorting into granules of a high specific gravity and granules of a low specific gravity, and a fourth step of recovering the granules of a low specific gravity.SELECTED DRAWING: None
【課題】廃コンクリートから骨材の混入が抑えられたセメント原料を回収する方法を提供すること。【解決手段】廃コンクリートを破砕する第１の工程と、廃コンクリートの破砕物を、細粒中のセメントペースト含有率が６０質量％以上となる分級点で分級する第２の工程と、細粒を乾式比重選別し、重比重物と軽比重物とに選別する第３の工程と、軽比重物を回収する第４の工程、を含む、廃コンクリートからのセメント原料回収方法。【選択図】なし
METHOD OF RECOVERING CEMENT RAW MATERIAL FROM WASTE CONCRETE
廃コンクリートからのセメント原料回収方法
TAKIZAWA AKIRA (author) / SANO HIROKI (author) / MEIDO TAKESHI (author) / ICHINOTSUBO YUKITERU (author)
2024-03-25
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
METHOD FOR RECOVERING CEMENT RAW MATERIAL FROM WASTE CONCRETE
| European Patent Office | 2022