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A platform for research: civil engineering, architecture and urbanism
MIXED CEMENT COMPOSITION AND PRODUCTION METHOD THEREOF
To provide a mixed cement composition capable of contributing to CO2 reduction by increasing an amount of an admixture to be used, and efficiently using blast furnace slag which has a low basicity.SOLUTION: A mixed cement composition comprises: a cement clinker; gypsum; lime stone; and a blast furnace slag including Al2O3 whose amount is in a prescribed range. In the blast furnace slag, a basicity Bu(7d) and a basicity Bu(28d) based on chemical component are equal to or less than prescribed values, an activity index A50(7d) and an activity index A50(28d) are in a prescribed range. Contents of the lime stone and the blast furnace slag are in a prescribed range. The content of the blast furnace slag is in the prescribed range, with a total amount of the lime stone and blast furnace slag as a reference. The formula (1) is: Bu(7d)=(CaO+0.43MgO+0.28Al2O3)/SiO2-0.46TiO2-0.27MnO and the formula (2) is: Bu(28d)=(CaO+0.42MgO+0.16Al2O3)/SiO2-0.60TiO2-0.14MnO.SELECTED DRAWING: None
【課題】混合材の使用量を増加させることでＣＯ２削減に寄与し、かつ、低塩基度である高炉スラグの有効利用に資する混合セメント組成物を提供すること。【解決手段】本開示の一側面は、セメントクリンカ、石膏、石灰石、及びＡｌ２Ｏ３量が所定範囲である高炉スラグを含み、高炉スラグは、化学組成に基づく塩基度Ｂｕ（７ｄ）及び塩基度Ｂｕ（２８ｄ）が所定値以下であり、活性度指数Ａ５０（７ｄ）及び活性度指数Ａ５０（２８ｄ）が所定範囲内であり、石灰石及び高炉スラグの含有量が所定範囲内であり、高炉スラグの含有量は石灰石及び高炉スラグの合計量を基準として所定範囲内である、混合セメント組成物を提供する。Ｂｕ（７ｄ）＝（ＣａＯ＋０．４３ＭｇＯ＋０．２８Ａｌ２Ｏ３）／ＳｉＯ２－０．４６ＴｉＯ２－０．２７ＭｎＯ…式（１）Ｂｕ（２８ｄ）＝（ＣａＯ＋０．４２ＭｇＯ＋０．１６Ａｌ２Ｏ３）／ＳｉＯ２－０．６０ＴｉＯ２－０．１４ＭｎＯ…式（２）【選択図】なし
MIXED CEMENT COMPOSITION AND PRODUCTION METHOD THEREOF
To provide a mixed cement composition capable of contributing to CO2 reduction by increasing an amount of an admixture to be used, and efficiently using blast furnace slag which has a low basicity.SOLUTION: A mixed cement composition comprises: a cement clinker; gypsum; lime stone; and a blast furnace slag including Al2O3 whose amount is in a prescribed range. In the blast furnace slag, a basicity Bu(7d) and a basicity Bu(28d) based on chemical component are equal to or less than prescribed values, an activity index A50(7d) and an activity index A50(28d) are in a prescribed range. Contents of the lime stone and the blast furnace slag are in a prescribed range. The content of the blast furnace slag is in the prescribed range, with a total amount of the lime stone and blast furnace slag as a reference. The formula (1) is: Bu(7d)=(CaO+0.43MgO+0.28Al2O3)/SiO2-0.46TiO2-0.27MnO and the formula (2) is: Bu(28d)=(CaO+0.42MgO+0.16Al2O3)/SiO2-0.60TiO2-0.14MnO.SELECTED DRAWING: None
【課題】混合材の使用量を増加させることでＣＯ２削減に寄与し、かつ、低塩基度である高炉スラグの有効利用に資する混合セメント組成物を提供すること。【解決手段】本開示の一側面は、セメントクリンカ、石膏、石灰石、及びＡｌ２Ｏ３量が所定範囲である高炉スラグを含み、高炉スラグは、化学組成に基づく塩基度Ｂｕ（７ｄ）及び塩基度Ｂｕ（２８ｄ）が所定値以下であり、活性度指数Ａ５０（７ｄ）及び活性度指数Ａ５０（２８ｄ）が所定範囲内であり、石灰石及び高炉スラグの含有量が所定範囲内であり、高炉スラグの含有量は石灰石及び高炉スラグの合計量を基準として所定範囲内である、混合セメント組成物を提供する。Ｂｕ（７ｄ）＝（ＣａＯ＋０．４３ＭｇＯ＋０．２８Ａｌ２Ｏ３）／ＳｉＯ２－０．４６ＴｉＯ２－０．２７ＭｎＯ…式（１）Ｂｕ（２８ｄ）＝（ＣａＯ＋０．４２ＭｇＯ＋０．１６Ａｌ２Ｏ３）／ＳｉＯ２－０．６０ＴｉＯ２－０．１４ＭｎＯ…式（２）【選択図】なし
MIXED CEMENT COMPOSITION AND PRODUCTION METHOD THEREOF
混合セメント組成物、及びその製造方法
GOTO TAKU (author) / ITO TAKAYASU (author)
2022-10-13
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
MIXED CEMENT COMPOSITION AND MANUFACTURING METHOD THEREOF
| European Patent Office | 2022