Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Uso de un compuesto de ferroaluminato de calcio, aditivo de cemento y composición de cemento
Uso de un compuesto de ferroaluminato de calcio que comprende un sistema de CaO-Al2O3-Fe2O3 y que tiene un contenido de Fe2O3 del 0,5 al 15% en masa, una estructura de tipo CaO*2Al2O3 y una razón molar CaO/Al2O3 en un intervalo de desde 0,15 hasta 0,7, como aditivo de cemento.
It is the object of the invention to provide a cement admixture, and a cement composition that can impart good enough rustproofness to reinforcing bars in hardened cement concrete, and can have resistance to penetration of chloride ions entering from the outside, present the hardened cement concrete from getting porous due to reduced leaching of Ca ions and have a self-recovery capability. The invention provides a cement admixture characterized by containing a calcium ferroaluminate compound comprising a CaO-Al 2 O 3 -Fe 2 O 3 system, and having a Fe 2 O 3 content of 0.5 to 15% by mass and a CaO·2Al 2 O 3 structure with a CaO/Al 2 O 3 molar ratio ranging from 0.15 to 0.7. It is preferable that the fineness is 2,000 to 7,000 cm 2 /g as represented in terms of the Blaine's specific surface area value; the potentially hydraulic substance and/or pozzolan substance (pozzolan substance or the like) is also used; the pozzolan substance or the like contains one or two or more selected from the group consisting of finely pulverized, quenched, granulated blast-furnace slag, fly ash, silica fume, metakaolin, incinerated pulp sludge ash, incinerated sewage sludge ash, and waste glass powder; and the blending proportion of the calcium ferroaluminate compound to the pozzolan substance or the like ranges from 10/1 to 1/10 by mass. The invention also provides a cement composition containing cement and the cement admixture.
Uso de un compuesto de ferroaluminato de calcio, aditivo de cemento y composición de cemento
Uso de un compuesto de ferroaluminato de calcio que comprende un sistema de CaO-Al2O3-Fe2O3 y que tiene un contenido de Fe2O3 del 0,5 al 15% en masa, una estructura de tipo CaO*2Al2O3 y una razón molar CaO/Al2O3 en un intervalo de desde 0,15 hasta 0,7, como aditivo de cemento.
It is the object of the invention to provide a cement admixture, and a cement composition that can impart good enough rustproofness to reinforcing bars in hardened cement concrete, and can have resistance to penetration of chloride ions entering from the outside, present the hardened cement concrete from getting porous due to reduced leaching of Ca ions and have a self-recovery capability. The invention provides a cement admixture characterized by containing a calcium ferroaluminate compound comprising a CaO-Al 2 O 3 -Fe 2 O 3 system, and having a Fe 2 O 3 content of 0.5 to 15% by mass and a CaO·2Al 2 O 3 structure with a CaO/Al 2 O 3 molar ratio ranging from 0.15 to 0.7. It is preferable that the fineness is 2,000 to 7,000 cm 2 /g as represented in terms of the Blaine's specific surface area value; the potentially hydraulic substance and/or pozzolan substance (pozzolan substance or the like) is also used; the pozzolan substance or the like contains one or two or more selected from the group consisting of finely pulverized, quenched, granulated blast-furnace slag, fly ash, silica fume, metakaolin, incinerated pulp sludge ash, incinerated sewage sludge ash, and waste glass powder; and the blending proportion of the calcium ferroaluminate compound to the pozzolan substance or the like ranges from 10/1 to 1/10 by mass. The invention also provides a cement composition containing cement and the cement admixture.
Uso de un compuesto de ferroaluminato de calcio, aditivo de cemento y composición de cemento
04.05.2018
Patent
Elektronische Ressource
Spanisch
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