WO2012114622A1 - Cement composition and process for producing same - Google Patents
Cement composition and process for producing same Download PDFInfo
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- WO2012114622A1 WO2012114622A1 PCT/JP2011/079222 JP2011079222W WO2012114622A1 WO 2012114622 A1 WO2012114622 A1 WO 2012114622A1 JP 2011079222 W JP2011079222 W JP 2011079222W WO 2012114622 A1 WO2012114622 A1 WO 2012114622A1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/003—Barium or strontium cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/345—Hydraulic cements not provided for in one of the groups C04B7/02 - C04B7/34
- C04B7/3456—Alinite cements, e.g. "Nudelman"-type cements, bromo-alinite cements, fluoro-alinite cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
Definitions
- the present invention relates to a cement composition and a method for producing the same.
- the cement composition reacts with the components contained in the cement composition and water to form a hydrate and develop strength.
- the strength of cement paste, mortar or concrete increases as the amount of hydrate produced increases.
- cement users are demanding a cement composition capable of obtaining a hardened body such as concrete having excellent strength development without impairing the fluidity and setting time of the concrete.
- Non-Patent Document 1 As a method for improving the strength development of the concrete, means such as “reducing the fineness of the cement particles (brane specific surface area)” and “increasing the alite (C 3 S) content of the cement clinker” are used. (For example, Non-Patent Document 1).
- Non-Patent Document 1 the fineness and mineral composition of the cement composition such as “to make the fineness of the cement particles (brane specific surface area) fine”, “to increase the C 3 S content of the cement clinker”, etc. If the strength development of a hardened body such as concrete is improved by means of changing, there is a problem that the fluidity is lowered and the setting time is further shortened.
- the present invention has been made in view of the above problem, and maintains the appropriate fresh properties (standard soft water content, setting time) of cement paste, mortar, or concrete, and develops strength of a cured body such as mortar or concrete. It aims at providing the cement composition which can improve property, and its manufacturing method.
- the present inventors have maintained the fresh properties of cement paste, mortar or concrete, while improving the strength expression of a cured body such as mortar or concrete.
- the inventors have found that the strontium (Sr) content and the molybdenum (Mo) content in the cement composition have an influence, and have completed the present invention.
- the present invention relates to a cement composition having a Sr content of 0.02 to 0.06% by mass and a Mo content of 0.0002 to 0.0023% by mass.
- the present invention relates to the above cement composition having an R 2 O content of 0.3 to 0.6% by mass.
- the present invention relates to the above cement composition, wherein the MgO content is 0.7 to 1.8% by mass and the SO 3 content is 1.6 to 2.5% by mass.
- the present invention has a C 3 S content of 45 to 70% by mass, a C 2 S content of 5 to 25% by mass, a C 3 A content of 6 to 15% by mass and a C 4 AF content of 7 to 15%. It is related with the said cement composition which is the mass%.
- the present invention also provides limestone, meteorite, coal so that the Sr content of the cement composition is 0.02 to 0.06% by mass and the Mo content is 0.0002 to 0.0023% by mass.
- a process for preparing a cement clinker by adjusting the raw material intensity of a raw material selected from the group consisting of ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake and iron source (A) And a cement clinker, gypsum, and a step (B) of pulverizing limestone and blast furnace slag as a mixed material.
- the present invention provides the raw material for cement clinker in step (A) as follows: 700 to 1400 kg of limestone per ton of cement clinker, 20 to 150 kg of limestone, 0 to 300 kg of coal ash, 0 to 100 kg of clay, 0 to 100 kg of blast furnace slag,
- the present invention relates to a method for producing the above cement composition, comprising 10 to 150 kg, sewage sludge 0 to 100 kg, hydrocake 0 to 100 kg, and iron source 30 to 80 kg.
- the present invention in order to maintain the proper fresh properties of cement paste, mortar or concrete, while maintaining the standard soft water amount (water amount necessary for obtaining a certain softness) and setting time of cement paste. Further, it is possible to provide a cement composition and a method for producing the same, which improve the strength development property (for example, the strength development property of a material age of 28 days) of a cured body such as mortar or concrete.
- the cement composition of the present invention is characterized in that the Sr content is 0.02 to 0.06% by mass and the Mo content is 0.0002 to 0.0023% by mass.
- Sr and Mo in the cement composition are trace components.
- the present inventors have determined that the Sr content and the Mo content in a cement composition affect the strength development of a cement paste, mortar or concrete hardened body using the cement composition. By keeping the Sr content and Mo content in the proper ranges, the strength of these hardened bodies is maintained while maintaining appropriate fresh properties (standard soft water content, setting time) of cement paste, mortar or concrete. It was found that expression could be improved.
- the Sr content and the Mo content of the cement composition are content ratios (mass%) with respect to the total mass of the cement composition.
- the Sr content and Mo content of the cement composition are measured according to the Cement Association standard test method JCAS I-52 2000 “Method for quantifying trace components in cement by ICP emission spectroscopic analysis and electric heating atomic absorption spectrometric method”. can do.
- the Sr content of the cement composition is 0.02 to 0.06% by mass, preferably 0.025 to 0.057% by mass, more preferably 0.03 to 0.055% by mass. More preferably, it is 0.035 to 0.05% by mass, and particularly preferably 0.038 to 0.045% by mass.
- the Mo content of the cement composition is 0.0002 to 0.0023 mass%, preferably 0.0003 to 0.0020 mass% or less, more preferably 0.0004 to 0.0015 mass%. More preferably, the content is 0.0005 to 0.0012% by mass, and particularly preferably 0.0006 to 0.0009% by mass.
- the cement composition When the Sr content of the cement composition is less than 0.02% by mass or more than 0.06% by mass, or when the Mo content of the cement composition exceeds 0.0023% by mass, the cement composition is used. The setting time of the paste, mortar, or concrete is delayed, and there is a case where appropriate strength development of the hardened body of the cement paste, mortar, or concrete using the cement composition may not be maintained.
- the R 2 O (alkali) content of the cement composition refers to an amount represented by the following formula (1).
- R 2 O content of cement composition Na 2 O content + 0.658 ⁇ K 2 O content (1)
- the R 2 O content of the cement composition is preferably 0.3 to 0.6% by mass, more preferably 0.35 to 0.55% by mass, and still more preferably 0.37 to 0.54% by mass. Particularly preferred is 0.38 to 0.52 mass%.
- the R 2 O content of the cement composition is a content ratio (mass%) with respect to the total mass of the cement composition, and this content ratio is measured according to JIS R 5202: 1998 “Chemical analysis method of Portland cement”. be able to.
- the MgO content of the cement composition is preferably 0.7 to 1.8% by mass, more preferably 0.7 to 1.7% by mass, still more preferably 0.8 to 1.6% by mass, particularly preferably. 0.9 to 1.5% by mass, very preferably 0.9 to 1.4% by mass.
- the MgO content of the cement composition is the content ratio (mass%) with respect to the total mass of the cement composition, and this content ratio can be measured according to JIS R 5202: 1998 “Chemical analysis method of Portland cement”. it can.
- the SO 3 content of the cement composition is preferably 1.6 to 2.5% by mass, more preferably 1.6 to 2.4% by mass, still more preferably 1.7 to 2.35% by mass, Particularly preferred is 1.8 to 2.35% by mass.
- the SO 3 content in the cement composition is the content ratio (mass%) with respect to the total mass of the cement composition, and this content ratio is measured according to JIS R 5202: 1998 “Chemical analysis method of Portland cement”. be able to.
- the mineral composition of the cement composition preferably has a C 3 S content of 45 to 70% by mass, a C 2 S content of 5 to 25% by mass, a C 3 A content of 6 to 15% by mass and a C 4 AF content 7 to 15% by mass, more preferably 48 to 65% by mass of C 3 S content, 7 to 25% by mass of C 2 S content, 8 to 13% by mass of C 3 A content and C 4 AF content is 8 to 12% by mass, more preferably C 3 S content is 53 to 65% by mass, C 2 S content is 10 to 23% by mass, and C 3 A content is 9 to 12% by mass.
- % And C 4 AF content of 8 to 11% by mass, particularly preferably C 3 S content of 55 to 63% by mass, C 2 S content of 11 to 20% by mass, and C 3 A content of 9 to 11%.
- the mass% and the C 4 AF content are 8 to 10 mass%.
- the C 3 S content (alite), the C 2 S content (belite), the C 3 A content (aluminate phase), and the C 4 AF content (ferrite phase), which are mineral compositions of the cement composition ) Is calculated by the following Borg equations [1] to [4].
- CaO content”, SiO 2 content”, “Al 2 O 3 content” and “Fe 2 O 3 content” in the formula are respectively CaO, SiO 2 and Al 2 O 3 in the cement composition. a content (mass%) and for the entire mass of the cement composition of Fe 2 O 3. These content ratios can be measured by JIS R 5202 “Method for chemical analysis of Portland cement” or JIS R 5204 “Method for fluorescent X-ray analysis of cement”.
- the method for producing a cement composition of the present invention is such that the Sr content of the cement composition is 0.02 to 0.06% by mass and the Mo content is 0.0002 to 0.0023% by mass.
- Cement clinker is manufactured by adjusting the raw material intensity of raw materials selected from the group consisting of limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake and iron source, and firing the adjusted raw materials A step (A), a cement clinker, a gypsum, and a step (B) of blending and grinding limestone and blast furnace slag as a mixed material.
- Examples of the raw material for the cement clinker in the step (A) include limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake, and iron source.
- Coal ash is generated from a coal-fired power plant or the like, and includes cinder ash, fly ash, clinker ash, and bottom ash.
- Examples of construction generated soil include residual soil, mud, and waste soil that are generated as a result of construction work.
- Examples of sewage sludge include sludge, dry pulverized limestone, and incineration residues.
- Hydrocake is a by-product generated in the process of adding a small amount of calcium hydroxide to seawater when removing seawater magnesia clinker, and removing carbon dioxide in seawater.
- the thing which has a salt as a main component is mentioned.
- the iron source include copper tangling and blast furnace dust.
- it is a raw material which contains Sr to some extent, it may be other than said limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake, and iron source.
- the raw material unit of the cement clinker raw material in the step (A) is 700 to 1400 kg of limestone, 20 to 150 kg of meteorite, and 0 to 300 kg of coal ash on a dry base (state not containing water) per ton (t) of cement clinker. It is preferable to add 0-100 kg of clay, 0-100 kg of blast furnace slag, 10-150 kg of construction generated soil, 0-100 kg of sewage sludge, 0-100 kg of hydrocake and 30-80 kg of iron source.
- step (A) as a raw material for cement clinker, limestone 800 to 1300 kg, meteorite 20 to 100 kg, coal ash 10 to 250 kg, clay 0 to 80 kg, blast furnace slag 5 per ton (t) of cement clinker More preferably, 50 kg, construction soil 20-150 kg, sewage sludge 0-70 kg, hydrocake 20-80 kg and iron source 30-60 kg are blended. More preferably, the coal ash is 20 to 250 kg on a dry basis.
- the “raw material basic unit” means the mass (kg / t-clinker) of each raw material used for producing 1 ton of cement clinker.
- step (A) As a method of adjusting the raw material basic unit of the cement clinker raw material in step (A), the Sr content and the Mo content in each cement clinker raw material are measured, and the raw material basic unit of the cement clinker raw material containing a large amount of Sr or Mo is used. Mainly adjusting the raw material basic unit so that the Sr content of the cement clinker composition is 0.02 to 0.06 mass% and the Mo content is 0.0002 to 0.0023 mass%.
- the amount of iron source used has a great influence on the Mo content in the cement composition.
- the copper chain has a high Mo content, and when the copper chain is used as the iron source, 30-80 kg per ton (t) of cement clinker, which is a preferable range as a raw material basic unit of the iron source.
- / T is preferably 5 to 70 kg / t, more preferably 5 to 60 kg / t, still more preferably 5 to 55 kg / t, and particularly preferably 5 to 5 kg per ton of cement clinker. 50 kg / t.
- the MgO content of the cement composition in a specific range, based on the MgO content of copper tangles and blast furnace dust as limestone, meteorite, blast furnace slag, coal ash, construction generated soil, blast furnace dust, hydrocake and iron source, The raw material intensity of each raw material is adjusted so that the total MgO content of these raw materials is 0.7 to 1.8% by mass.
- Sr content in each raw material, Mo content, and MgO content are in the following ranges.
- Sr content in each raw material, Mo content, and MgO content are the content rate (mass%) with respect to each whole raw material (100 mass%).
- the Sr content is preferably 0.005 to 0.07% by mass, more preferably 0.005 to 0.06% by mass, still more preferably 0.01 to 0.06% by mass, particularly preferably.
- a thing of 0.015-0.055 mass is used.
- the Mo content is preferably 0.002% by mass or less, more preferably 0.001% by mass or less, still more preferably 0.0005% by mass or less, and particularly preferably 0.0003% by mass or less. use.
- the MgO content is preferably 0.1 to 1.5% by mass or less, more preferably 0.2 to 1.3% by mass or less, still more preferably 0.2 to 1.1% by mass or less. Particularly preferably, 0.3 to 1.0% by mass is used.
- the R 2 O content is preferably 0.05% by mass or less, more preferably 0.001 to 0.04% by mass, still more preferably 0.005 to 0.03% by mass, and particularly preferably 0. 0.005 to 0.02% by mass is used.
- the Sr content is preferably 0.001 to 0.04% by mass, more preferably 0.001 to 0.03% by mass, still more preferably 0.001 to 0.025% by mass, and still more preferably. 0.001 to 0.02% by mass is used.
- the Mo content is preferably 0.002% by mass or less, more preferably 0.001% by mass or less, further preferably 0.0005% by mass or less, particularly preferably 0.0004% by mass or less. use.
- the content of MgO is preferably 0.05 to 1.0% by mass, more preferably 0.1 to 0.8% by mass, still more preferably 0.1 to 0.6% by mass, particularly preferably 0. Use 1 to 0.5% by mass.
- the R 2 O content is preferably 0.1 to 4.0% by mass, more preferably 0.1 to 3.0% by mass, still more preferably 0.3 to 2.5% by mass, particularly Preferably, 0.3 to 2.0% by mass is used.
- the coal ash has a Sr content of preferably 0.02 to 0.2% by mass, more preferably 0.02 to 0.15% by mass, still more preferably 0.02 to 0.13% by mass, particularly preferably. Is 0.02 to 0.12% by mass.
- the coal ash has a Mo content of preferably 0.004% by mass or less, more preferably 0.003% by mass or less, still more preferably 0.002% by mass or less, and particularly preferably 0.0015% by mass or less. Is used.
- the MgO content is preferably 0.2 to 3.0% by mass, more preferably 0.4 to 3.0% by mass, still more preferably 0.4 to 2.5% by mass, particularly preferably. Is 0.4 to 2.3% by mass.
- the R 2 O content is preferably 0.1 to 3.5% by mass, more preferably 0.2 to 3.0% by mass, still more preferably 0.3 to 2.5% by mass, Particularly preferably, 0.5 to 2.0% by mass is used.
- the Sr content is preferably 0.02 to 0.08% by mass, more preferably 0.02 to 0.07% by mass, still more preferably 0.02 to 0.06% by mass, and particularly preferably. Is 0.02 to 0.05% by mass or less.
- the Mo content is preferably 0.002% by mass or less, more preferably 0.001% by mass or less, still more preferably 0.0005% by mass or less, particularly preferably 0.0003% by mass or less. Is used.
- the content of MgO is preferably 3.0 to 10% by mass, more preferably 3.0 to 8.0% by mass, still more preferably 3.0 to 7.0% by mass, and particularly preferably 4%. 0.0 to 7.0% by mass is used.
- the R 2 O content is preferably 0.02 to 1.0% by mass, more preferably 0.04 to 0.8% by mass, still more preferably 0.06 to 0.6% by mass, Particularly preferably, 0.08 to 0.5% by mass is used.
- the Sr content is preferably 0.001 to 0.03% by mass, more preferably 0.003 to 0.025% by mass, still more preferably 0.003 to 0.02% by mass, and particularly preferably. 0.004 to 0.015 mass% or less is used.
- the clay has a Mo content of preferably 0.002% by mass or less, more preferably 0.001% by mass or less, still more preferably 0.0005% by mass or less, and particularly preferably 0.0004% by mass or less. use.
- the content of MgO is preferably 0.3 to 6.0% by mass, more preferably 0.3 to 5.0% by mass, still more preferably 0.3 to 4.0% by mass, particularly preferably. Is 0.5 to 3.0% by mass.
- the R 2 O content is preferably 0.5 to 4.0% by mass, more preferably 0.7 to 3.5% by mass, still more preferably 1.0 to 3.0% by mass, Preferably 1.2 to 2.8% by mass is used.
- the Sr content is preferably 0.01 to 0.4% by mass, more preferably 0.01 to 0.3% by mass, still more preferably 0.01 to 0.2% by mass, Preferably, 0.015 to 0.1% by mass is used.
- the Mo content is preferably 0.002% by mass or less, more preferably 0.001% by mass or less, still more preferably 0.0005% by mass or less, and particularly preferably 0.0004% by mass or less.
- the content of MgO is preferably 0.5 to 6.0% by mass, more preferably 0.5 to 5.0% by mass, still more preferably 1.0 to 4.0% by mass, especially Preferably, 1.0 to 3.0% by mass is used.
- the content of R 2 O is preferably 0.5 to 4.5% by mass, more preferably 0.7 to 4.0% by mass, and still more preferably 1.0 to 3.5% by mass. Particularly preferably, 1.2 to 3.0% by mass is used.
- the Sr content is preferably 0.001 to 0.1% by mass, more preferably 0.001 to 0.07% by mass, still more preferably 0.001 to 0.05% by mass, and particularly preferably. Is 0.001 to 0.04% by mass.
- the Mo content is preferably 0.002% by mass or less, more preferably 0.0015% by mass or less, further preferably 0.0012% by mass or less, and particularly preferably 0.0011% by mass or less. Is used.
- the MgO content is preferably 0.05 to 4.0% by mass, more preferably 0.1 to 3.0% by mass, still more preferably 0.1 to 2.5% by mass, particularly preferably.
- the R 2 O content is preferably 0.4 to 3.5% by mass, more preferably 0.6 to 3.0% by mass, still more preferably 0.8 to 2.5% by mass, Particularly preferably, 1.0 to 2.0% by mass is used.
- the hydrocake preferably has a Sr content of 0.1 to 0.8% by mass, more preferably 0.1 to 0.7% by mass, still more preferably 0.1 to 0.6% by mass, and particularly preferably. Is 0.1 to 0.5% by mass.
- the Mo content is preferably 0.002% by mass or less, more preferably 0.001% by mass or less, still more preferably 0.0005% by mass or less, and particularly preferably 0.0003% by mass or less.
- the hydrocake has an MgO content of preferably 5.0 to 30% by mass, more preferably 5.0 to 25% by mass, still more preferably 10 to 25% by mass, and particularly preferably 10 to 20% by mass. Is used.
- the hydrocake preferably has an R 2 O content of 0.02 to 1.5% by mass, more preferably 0.04 to 1.2% by mass, still more preferably 0.06 to 1.0% by mass, Particularly preferably, 0.08 to 0.8% by mass is used.
- the copper content is preferably 0.005 to 0.05% by mass, more preferably 0.005 to 0.04% by mass, still more preferably 0.005 to 0.03% by mass, and particularly preferably Sr content. Is 0.005 to 0.02% by mass.
- the Mo content is preferably 0.0002 to 0.8 mass%, more preferably 0.0002 to 0.6 mass%, still more preferably 0.0002 to 0.4 mass%, particularly preferably. Is 0.0002 to 0.3% by mass.
- the content of MgO is preferably 0.5 to 3.0% by mass, more preferably 0.5 to 2.5% by mass, still more preferably 0.6 to 2.0% by mass, particularly preferably. Is 0.7 to 1.5% by mass.
- the copper entanglement has an R 2 O content of preferably 0.04 to 2.0% by mass, more preferably 0.06 to 1.8% by mass, still more preferably 0.08 to 1.6% by mass, Particularly preferably, 1.0 to 1.4% by mass is used.
- the Sr content is preferably 0.001 to 0.03% by mass, more preferably 0.001 to 0.02% by mass, still more preferably 0.001 to 0.015% by mass, and particularly preferably. Is 0.001 to 0.01% by mass.
- the Mo content is preferably 0.004% by mass or less, more preferably 0.003% by mass or less, still more preferably 0.002% by mass or less, and particularly preferably 0.001% by mass or less. Is used.
- the MgO content is preferably 0.1 to 3.0% by mass, more preferably 0.15 to 2.0% by mass, still more preferably 0.15 to 1.5% by mass, particularly Preferably 0.2 to 1.5% by mass is used.
- the R 2 O content is preferably 0.002 to 1.0% by mass, more preferably 0.004 to 0.8% by mass, still more preferably 0.006 to 0.6% by mass, Particularly preferably, 0.008 to 0.4% by mass is used.
- the cement clinker can be manufactured using an existing cement manufacturing facility such as an SP system (multistage cyclone preheating system) or an NSP system (multistage cyclone preheating system equipped with a calcining furnace).
- SP system multistage cyclone preheating system
- NSP system multistage cyclone preheating system equipped with a calcining furnace
- a sample for quality control is taken at the time of firing the cement clinker, the Sr and Mo contents of the cement clinker of this sample are measured, and based on the Sr and Mo contents in each raw material.
- the usage ratio (raw material basic unit) of each raw material is adjusted so that the Sr content in the cement clinker is 0.02 to 0.06% by mass and the Mo content is 0.0002 to 0.0023% by mass.
- coal ash has a relatively high Sr content
- construction generated soil has a relatively low Sr content.
- the Sr content in a cement clinker sampled for a sample is less than 0.02% by mass.
- Mo content in the cement clinker sampled for the sample exceeds 0.0023% by mass, among the iron sources of the cement clinker raw material, the raw material unit of the copper tangled with a relatively high Mo content is used. Reduce and conversely increase the raw material intensity of blast furnace dust.
- Mo content can be adjusted without changing the mineral composition of a cement clinker by adjusting the raw material basic unit of each raw material used as an iron source among cement clinker raw materials.
- the MgO content of the cement composition a sample for quality control is taken at the time of firing the cement clinker, the MgO content in the cement clinker of this sample is measured, and based on the MgO content in each raw material.
- the use ratio (raw material basic unit) of each raw material is adjusted so that the MgO content of the cement composition is 0.7 to 1.8% by mass.
- blast furnace slag and / or hydrocake has a relatively high MgO content
- coal ash and / or construction generated soil has a relatively low MgO content.
- the raw material intensity of blast furnace slag and / or hydrocake is increased, and the raw material intensity of coal ash and / or construction generated soil is reduced.
- the MgO content in the cement clinker collected for the sample exceeds 1.8% by mass, the raw material intensity of blast furnace slag and / or hydrocake is reduced, and the coal ash and / or construction generated soil Increase raw material intensity.
- each raw material of the cement clinker is not particularly limited, but it is preferable to pulverize and mix with a raw material pulverization mill or the like, and further to mix with a blending silo.
- the cement clinker raw material that has been pulverized and mixed can be further fired using a suspension preheater and a rotary kiln, which are existing facilities.
- the firing conditions such as the firing temperature and firing time of the cement clinker
- the Sr content becomes 0.02 to 0.06% by mass
- the Mo content becomes 0.0002 to 0.0023% by mass.
- a cement clinker for producing the cement composition obtained can be obtained.
- the firing temperature of the cement clinker is not particularly limited, but when an NSP type cement production facility is used, the temperature of the cement clinker in the vicinity of the rotary kiln outlet is preferably 800 to 1700 ° C, more preferably 900 to 1600 ° C. More preferably, it is 1000 to 1500 ° C.
- the firing time is 20 minutes to 2 hours, more preferably 30 minutes to 2 hours, and still more preferably 45 minutes to 1.5 hours.
- the obtained cement clinker is preferably cooled to about 100 to 200 ° C., for example, by a clinker cooler provided on the downstream side of the rotary kiln.
- the cooling rate is preferably 10 to 60 ° C./min, more preferably 15 to 45 ° C./min, and further preferably 15 to 30 ° C./min.
- the cooling rate is in the range of 10 to 60 ° C./min, a cement composition capable of producing mortar and concrete having excellent strength development can be obtained.
- the cement composition is pulverized by mixing cement clinker and gypsum having an Sr content of 0.02 to 0.06 mass% and an Mo content of 0.0002 to 0.0023 mass%. Can be manufactured.
- the gypsum desirably satisfies the quality specified in JIS R 9151 “Natural gypsum for cement”. Specifically, dihydrate gypsum, hemihydrate gypsum, and insoluble anhydrous gypsum are preferably used.
- the SO 3 content in the cement composition is compared with the cement clinker having the Sr content of 0.02 to 0.06 mass% and the Mo content of 0.0002 to 0.0023 mass%.
- pulverization method The method of using classifiers, such as grinders, such as a ball mill, and a separator, is mentioned.
- the cement clinker content is 95 to 97% by mass with respect to the total mass of the cement composition, and the gypsum content is 3 to 5% by mass.
- the cement composition may further contain a mixed material.
- a mixed material blast furnace slag defined by JIS R 5211 “Blast Furnace Cement”, siliceous mixed material defined by JIS R 5212 “Silica Cement”, fly ash defined by JIS A 6201 “Fly Ash for Concrete”.
- Limestone fine powder can be used.
- the total content (% by mass) of the mixed material is preferably 5% by mass or less with respect to the total mass of the cement composition. Since the content ratio of the mixed material is as small as 5% by mass or less, even when the mixed material is added, the Sr content, the Mo content, the MgO content, and the R 2 O content of the cement composition are almost affected. Does not reach.
- the R 2 O content of the cement composition after the pulverization step is preferably 0.3 to 0.6% by mass, preferably 0.3 to 0.6% by mass, more preferably 0.35 to 0.55% by mass. %, More preferably 0.37 to 0.54 mass%, particularly preferably 0.35 to 0.52 mass%.
- the R 2 O content of the cement composition is obtained by taking a sample for quality control at the time of firing the cement clinker, measuring the R 2 O content in the cement clinker of the sample, By adjusting raw material basic units such as ash, clay, construction generated soil and sewage sludge, the R 2 O content of the cement composition can be within the above range.
- the brane specific surface area of the cement composition according to this embodiment is preferably 2800 to 4000 cm 2 / g. When the brain specific surface area is within the above range, it is possible to produce mortar or concrete having further excellent strength development.
- the brane specific surface area of the cement composition is more preferably 3000 to 3800 cm 2 / g, and still more preferably 3000 to 3500 cm 2 / g.
- cement clinker ingredients As cement clinker raw materials, Sr content, Mo content and MgO content of limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake and iron source (copper tangled, blast furnace dust) Measure in advance, and in advance collect a sample for quality control during cement clinker firing, measure the Sr content, Mo content, MgO content and R 2 O content in the cement clinker of this sample, in each raw material Based on the Sr content, Mo content, MgO content and R 2 O content, the Sr content is 0.02 to 0.06 mass%, and the Mo content is 0.0002 to 0.0023.
- the use ratio (raw material basic unit) of each raw material was adjusted so that a cement clinker having a mass% was obtained.
- the usage ratio (raw material basic unit) of each raw material was adjusted so that a cement clinker having an MgO content of 0.7 to 1.8% by mass was obtained.
- the usage ratio (raw material basic unit) of each raw material was adjusted so that a cement clinker having an R 2 O content of 0.3 to 0.6% by mass was obtained.
- Table 1 shows the Sr content, Mo content, and MgO content of each raw material used in Examples and Comparative Examples.
- the chemical components and raw material basic units shown below are dry base (water-free state) raw material basic units. In Table 1, “ ⁇ 0.00025” indicates that the Mo content is 0.00025% by mass or less.
- the use ratio (raw material basic unit) of the cement clinker raw material is adjusted as follows. did.
- the Sr content of the cement clinker was adjusted by increasing / decreasing the use ratio of coal ash having a high Sr content of 0.106% by mass and construction soil having a low Sr content of 0.0272% by mass.
- the coal ash was reduced to increase the amount of construction generated soil, and the Sr content of the cement clinker was confirmed while confirming.
- the Mo content of the cement clinker was adjusted by increasing or decreasing the usage ratio of the blast furnace dust having a Mo content as small as 0.266 mass% and a Mo content as small as 0.001 mass%.
- the copper tangling was reduced to increase the blast furnace dust, and adjustment was performed while confirming the Mo content of the cement clinker.
- the MgO content of the cement clinker was adjusted by increasing or decreasing the usage ratio of the blast furnace slag having a high MgO content of 5.12% by mass and the hydrocake having a high MgO content of 14.19% by mass.
- cement clinker ingredients The basic unit of each raw material used as a cement clinker raw material was limestone 800-1300 kg / t-clinker, meteorite 20-100 kg / t-clinker, coal ash 10-250 kg / t-clinker, clay 0-80 kg / t-clinker, Blast furnace slag 5-50kg / t-clinker, construction generated soil 20-150kg / t-clinker, sewage sludge 0-70kg / t-clinker, hydrocake 20-80kg / t-clinker and iron source 30-60kg / t-clinker (5 to 50 kg / t-clinker from copper tangled, 25 to 55 kg / t-clinker from blast furnace dust).
- the cement clinker raw material was prepared, and the prepared raw material was baked in an NSP kiln at a maximum temperature of 1200 to 1500 ° C. to produce a cement clinker.
- the temperature of the cement clinker in the vicinity of the NSP kiln outlet was 1000-1500 ° C.
- the cement clinker was cooled from 1000-1400 ° C. to 100-200 ° C. at a cooling rate of 10-60 ° C./min with a clinker cooler provided on the downstream side of the rotary kiln.
- the obtained cement clinker is blended with dihydrate gypsum so that the content of SO 3 in the cement composition is 2% by mass, and further mixed material (limestone, blast furnace slag) is 4% by mass of limestone and 1% by mass of blast furnace slag. And pulverized with an actual mill so that the specific surface area of the brain was 3100 to 3400 cm 2 / g to obtain a cement composition.
- the standard soft water amount is an amount of water necessary for making the softness (softness) of the cement paste constant, and the larger the amount, the lower the fluidity of the cement.
- the measuring method is as follows. 500 g of cement composition is put in a kneading bowl, water is added and kneaded, cement paste is put into a container, the surface is smoothed, the standard bar is lowered, and after 30 seconds the standard bar The distance between the tip and the bottom plate was measured, and the amount of water at which the distance was 6 ⁇ 1 mm (standard softness) was measured to obtain the standard soft water amount.
- the Mo content is less than 0.0023 mass% (specifically, the Mo content is 0.0007 to 0.0022 mass%), and the Sr content is 0.02 to 0.06 mass%.
- the relationship between the Sr content of the cement compositions of Examples 1 to 4 having an Sr content of 0.0262 to 0.058 mass%) and the compressive strength of the mortar using this cement composition Indicates.
- FIG. 1 also shows the Sr content of the cement compositions of Comparative Examples 1 to 7 in which the Mo content exceeds 0.0023 mass% and the Sr content is 0.02 to 0.06 mass%. The relationship with the compressive strength of the mortar using a composition is shown.
- the cement compositions of Examples 1 to 4 had a standard soft water amount (a constant amount of cement paste) compared to the cement compositions of Comparative Examples 1 to 7, although the mortar compressive strength was increased. The amount of water necessary to obtain the softness of the water is maintained, there is no significant difference in fluidity, and the setting time has not changed significantly.
Abstract
Description
セメント組成物のR2O含有量=Na2O含有量+0.658×K2O含有量 (1)
セメント組成物のR2O含有量は、好ましくは0.3~0.6質量%、より好ましくは0.35~0.55質量%、更に好ましくは0.37~0.54質量%であり、特に好ましくは0.38~0.52質量%である。セメント組成物のR2O含有量が、上記範囲内であると、適度な流動性、凝結時間を維持しつつ、セメント組成物を用いたセメントペースト、モルタル又はコンクリートの強度発現性を向上させることができる。セメント組成物のR2O含有量は、セメント組成物の全体質量に対する含有割合(質量%)であり、この含有割合は、JIS R 5202:1998「ポルトランドセメントの化学分析方法」に準じて測定することができる。 The R 2 O (alkali) content of the cement composition refers to an amount represented by the following formula (1).
R 2 O content of cement composition = Na 2 O content + 0.658 × K 2 O content (1)
The R 2 O content of the cement composition is preferably 0.3 to 0.6% by mass, more preferably 0.35 to 0.55% by mass, and still more preferably 0.37 to 0.54% by mass. Particularly preferred is 0.38 to 0.52 mass%. When the R 2 O content of the cement composition is within the above range, the strength development of cement paste, mortar or concrete using the cement composition is improved while maintaining appropriate fluidity and setting time. Can do. The R 2 O content of the cement composition is a content ratio (mass%) with respect to the total mass of the cement composition, and this content ratio is measured according to JIS R 5202: 1998 “Chemical analysis method of Portland cement”. be able to.
C2S含有量(質量%)=2.87×SiO2含有量(質量%)-0.754×C3S含有量(質量%) ・・・[2]
C3A含有量(質量%)=2.65×Al2O3含有量(質量%)-1.69×Fe2O3含有量(質量%) ・・・[3]
C4AF含有量(質量%)=3.04×Fe2O3含有量(質量%) ・・・[4] C 3 S content (mass%) = 4.07 × CaO content (mass%) − 7.60 × SiO 2 content (mass%) − 6.72 × Al 2 O 3 content (mass%) − 1.43 × Fe 2 O 3 content (mass%) − 2.85 × SO 3 content (mass%) [1]
C 2 S content (mass%) = 2.87 × SiO 2 content (mass%) − 0.754 × C 3 S content (mass%)... [2]
C 3 A content (mass%) = 2.65 × Al 2 O 3 content (mass%) − 1.69 × Fe 2 O 3 content (mass%)... [3]
C 4 AF content (mass%) = 3.04 × Fe 2 O 3 content (mass%) (4)
石炭灰は、石炭火力発電所等から発生するものであり、シンダアッシュ、フライアッシュ、クリンカアッシュ及びボトムアッシュが挙げられる。建設発生土としては、建設工事の施工に伴い副次的に発生する残土や泥土、廃土等が挙げられる。下水汚泥としては、汚泥単味のほか、これに石灰石を加えて乾粉化したものや、焼却残渣等が挙げられる。ハイドロケーキとしては、海水マグネシアクリンカーを製造する際の、海水に少量の水酸化カルシウムを加え、海水中の炭酸ガスを除去する工程で発生する副産物であり、カルシウム及びマグネシウムそれぞれの水酸化物及び炭酸塩を主成分とするものが挙げられる。鉄源としては、銅からみ、高炉ダスト等が挙げられる。なお、Srをある程度含有する原料であれば、上記の石灰石、硅石、石炭灰、粘土、高炉スラグ、建設発生土、下水汚泥、ハイドロケーキ及び鉄源以外であっても良い。 Examples of the raw material for the cement clinker in the step (A) include limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake, and iron source.
Coal ash is generated from a coal-fired power plant or the like, and includes cinder ash, fly ash, clinker ash, and bottom ash. Examples of construction generated soil include residual soil, mud, and waste soil that are generated as a result of construction work. Examples of sewage sludge include sludge, dry pulverized limestone, and incineration residues. Hydrocake is a by-product generated in the process of adding a small amount of calcium hydroxide to seawater when removing seawater magnesia clinker, and removing carbon dioxide in seawater. The thing which has a salt as a main component is mentioned. Examples of the iron source include copper tangling and blast furnace dust. In addition, as long as it is a raw material which contains Sr to some extent, it may be other than said limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake, and iron source.
銅からみとしては、Sr含有量が、好ましくは0.005~0.05質量%、より好ましくは0.005~0.04質量%、更に好ましくは0.005~0.03質量%、特に好ましくは0.005~0.02質量%のものを使用する。銅からみとしては、Mo含有量が、好ましくは0.0002~0.8質量%、より好ましくは0.0002~0.6質量%、更に好ましくは0.0002~0.4質量%、特に好ましくは0.0002~0.3質量%のものを使用する。銅からみとしては、MgO有量が、好ましくは0.5~3.0質量%、より好ましくは0.5~2.5質量%、更に好ましくは0.6~2.0質量%、特に好ましくは0.7~1.5質量%のものを使用する。銅からみとしては、R2O含有量が、好ましくは0.04~2.0質量%、より好ましくは0.06~1.8質量%、更に好ましくは0.08~1.6質量%、特に好ましくは1.0~1.4質量%のものを使用する。 When using copper tangled and blast furnace dust as the iron source, it is preferable to use those materials whose Sr content, Mo content and MgO content are in the following ranges.
The copper content is preferably 0.005 to 0.05% by mass, more preferably 0.005 to 0.04% by mass, still more preferably 0.005 to 0.03% by mass, and particularly preferably Sr content. Is 0.005 to 0.02% by mass. From the viewpoint of copper, the Mo content is preferably 0.0002 to 0.8 mass%, more preferably 0.0002 to 0.6 mass%, still more preferably 0.0002 to 0.4 mass%, particularly preferably. Is 0.0002 to 0.3% by mass. As for the copper entanglement, the content of MgO is preferably 0.5 to 3.0% by mass, more preferably 0.5 to 2.5% by mass, still more preferably 0.6 to 2.0% by mass, particularly preferably. Is 0.7 to 1.5% by mass. The copper entanglement has an R 2 O content of preferably 0.04 to 2.0% by mass, more preferably 0.06 to 1.8% by mass, still more preferably 0.08 to 1.6% by mass, Particularly preferably, 1.0 to 1.4% by mass is used.
[セメントクリンカーの原料]
セメントクリンカー原料としては、石灰石、硅石、石炭灰、粘土、高炉スラグ、建設発生土、下水汚泥、ハイドロケーキ及び鉄源(銅からみ、高炉ダスト)のSr含有量、Mo含有量及びMgO含有量を予め測定し、更に予めセメントクリンカー焼成時に品質管理用のサンプルを採取し、このサンプルのセメントクリンカー中のSr含有量、Mo含有量、MgO含有量及びR2O含有量を測定し、各原料中のSr含有量、Mo含有量、MgO含有量及びR2O含有量に基づいて、Sr含有量が0.02~0.06質量%であり、且つMo含有量が0.0002~0.0023質量%であるセメントクリンカーが得られるように各原料の使用比率(原料原単位)を調整した。また、MgO含有量が0.7~1.8質量%であるセメントクリンカーが得られるように各原料の使用比率(原料原単位)を調整した。更に、R2O含有量が0.3~0.6質量%であるセメントクリンカーが得られるように各原料の使用比率(原料原単位)を調整した。実施例及び比較例で使用した各原料のSr含有量、Mo含有量及びMgO含有量を表1に記載する。なお、以下に示す化学成分および原料原単位は、ドライベース(水分を含まない状態)の原料原単位である。また、表1中、「<0.00025」は、Mo含有量が0.00025質量%以下であることを示す。 (Examples 1 to 4, Comparative Examples 1 to 7)
[Cement clinker ingredients]
As cement clinker raw materials, Sr content, Mo content and MgO content of limestone, meteorite, coal ash, clay, blast furnace slag, construction generated soil, sewage sludge, hydrocake and iron source (copper tangled, blast furnace dust) Measure in advance, and in advance collect a sample for quality control during cement clinker firing, measure the Sr content, Mo content, MgO content and R 2 O content in the cement clinker of this sample, in each raw material Based on the Sr content, Mo content, MgO content and R 2 O content, the Sr content is 0.02 to 0.06 mass%, and the Mo content is 0.0002 to 0.0023. The use ratio (raw material basic unit) of each raw material was adjusted so that a cement clinker having a mass% was obtained. In addition, the usage ratio (raw material basic unit) of each raw material was adjusted so that a cement clinker having an MgO content of 0.7 to 1.8% by mass was obtained. Furthermore, the usage ratio (raw material basic unit) of each raw material was adjusted so that a cement clinker having an R 2 O content of 0.3 to 0.6% by mass was obtained. Table 1 shows the Sr content, Mo content, and MgO content of each raw material used in Examples and Comparative Examples. The chemical components and raw material basic units shown below are dry base (water-free state) raw material basic units. In Table 1, “<0.00025” indicates that the Mo content is 0.00025% by mass or less.
セメントクリンカー原料として使用した各原料の原単位は、石灰石800~1300kg/t-クリンカー、硅石20~100kg/t-クリンカー、石炭灰10~250kg/t-クリンカー、粘土0~80kg/t-クリンカー、高炉スラグ5~50kg/t-クリンカー、建設発生土20~150kg/t-クリンカー、下水汚泥0~70kg/t-クリンカー、ハイドロケーキ20~80kg/t-クリンカー及び鉄源30~60kg/t-クリンカー(銅からみ5~50kg/t-クリンカー、高炉ダスト25~55kg/t-クリンカー)であった。 [Cement clinker ingredients]
The basic unit of each raw material used as a cement clinker raw material was limestone 800-1300 kg / t-clinker, meteorite 20-100 kg / t-clinker, coal ash 10-250 kg / t-clinker, clay 0-80 kg / t-clinker, Blast furnace slag 5-50kg / t-clinker, construction generated soil 20-150kg / t-clinker, sewage sludge 0-70kg / t-clinker, hydrocake 20-80kg / t-clinker and iron source 30-60kg / t-clinker (5 to 50 kg / t-clinker from copper tangled, 25 to 55 kg / t-clinker from blast furnace dust).
上記セメントクリンカー原料を調合し、調合した原料をNSPキルンで最高温度1200~1500℃で焼成し、セメントクリンカーを製造した。NSPキルン出口付近におけるセメントクリンカーの温度は1000~1500℃であった。このセメントクリンカーを、ロータリーキルンの下流側に設けられたクリンカークーラーで、1000~1400℃から100~200℃まで、10~60℃/分の冷却速度で冷却した。 [Manufacture of cement clinker]
The cement clinker raw material was prepared, and the prepared raw material was baked in an NSP kiln at a maximum temperature of 1200 to 1500 ° C. to produce a cement clinker. The temperature of the cement clinker in the vicinity of the NSP kiln outlet was 1000-1500 ° C. The cement clinker was cooled from 1000-1400 ° C. to 100-200 ° C. at a cooling rate of 10-60 ° C./min with a clinker cooler provided on the downstream side of the rotary kiln.
得られたセメント組成物中のSiO2、Al2O3、Fe2O3、CaO、MgO及びSO3について、全体質量に対する含有割合(質量%)を測定した。これらの含有割合は、JIS R 5202:1998「ポルトランドセメントの化学分析方法」に準じて測定した。また、セメント組成物中のSr及びMo含有量を、セメント協会標準試験方法JCAS I-52 2000「ICP発光分光分析及び電気加熱式原子吸光分析によるセメント中の微量成分の定量方法」に準じて測定した結果を表2に示す。 [Chemical composition of cement composition (1)]
SiO 2 of the resulting cement composition, Al 2 O 3, Fe 2 O 3, CaO, for MgO and SO 3, was measured the content to the total mass ratio (% by weight). These content ratios were measured according to JIS R 5202: 1998 “Chemical analysis method of Portland cement”. In addition, the Sr and Mo contents in the cement composition were measured according to the Cement Association standard test method JCAS I-52 2000 “Method for quantifying trace components in cement by ICP emission spectroscopic analysis and electric heating atomic absorption spectrometry”. The results are shown in Table 2.
得られたセメント組成物中のNa2O、K2O及びR2Oについて、全体質量に対する含有割合(質量%)を測定した。これらの含有割合は、JIS R 5202:1998「ポルトランドセメントの化学分析方法」に準じて測定した。結果を表3に示す。 [Chemical composition of cement composition (2)]
Na 2 O of the resulting cement composition, the K 2 O and R 2 O, were determined content to the total mass ratio (% by weight). These content ratios were measured according to JIS R 5202: 1998 “Chemical analysis method of Portland cement”. The results are shown in Table 3.
<セメント組成物の鉱物組成>
得られたセメント組成物の鉱物組成(C3S含有量、C2S含有量、C3A含有量及びC4AF含有量)を、ボーグ式[1]~[4]に基づいて測定した。結果を表4に示す。 [Mineral composition of cement composition]
<Mineral composition of cement composition>
The mineral composition (C 3 S content, C 2 S content, C 3 A content and C 4 AF content) of the obtained cement composition was measured based on the Borg equation [1] to [4]. . The results are shown in Table 4.
<セメント組成物の粉末特性>
セメントの粉末特性(ブレーン比表面積及び45μm残分)について、JIS R 5201:1997「セメントの物理試験方法」に準じて測定した。結果を表5に示す。
<色調b値>
セメント組成物の色調b値は、測色色差計(日本電色製Spectro Color Meter Se2000)を用いて測定した結果を表5に示す。
<凝結時間、モルタル圧縮強さ>
凝結時間、モルタル圧縮強さは、得られたセメント組成物を用いて、JIS R 5201:1997「セメントの物理試験方法」に準じて測定した。結果を表5に示す。
<標準軟度水量>
標準軟度水量は、セメントペーストの軟らかさ(軟度)を一定にするために必要な水量のことであり、これが多いほどセメントの流動性が低下する。測定方法は、セメント組成物500gを練り鉢に入れ、水を加えて練り混ぜた後、セメントペーストを容器に投入し、表面を平滑にした後、標準棒を降下させて、30秒後に標準棒の先端と底板との間隔を測定し、この間隔が6±1mm(標準軟度)となる水量を測定し、標準軟度水量とした。 [Physical properties of cement composition]
<Powder characteristics of cement composition>
The powder characteristics (brane specific surface area and 45 μm residue) of the cement were measured according to JIS R 5201: 1997 “Cement physical test method”. The results are shown in Table 5.
<Color tone b value>
The color tone b value of the cement composition is shown in Table 5 as a result of measurement using a colorimetric color difference meter (Nippon Denshoku Spectro Color Meter Se2000).
<Setting time, mortar compressive strength>
The setting time and the mortar compressive strength were measured according to JIS R 5201: 1997 “Physical Test Method for Cement” using the obtained cement composition. The results are shown in Table 5.
<Standard soft water volume>
The standard soft water amount is an amount of water necessary for making the softness (softness) of the cement paste constant, and the larger the amount, the lower the fluidity of the cement. The measuring method is as follows. 500 g of cement composition is put in a kneading bowl, water is added and kneaded, cement paste is put into a container, the surface is smoothed, the standard bar is lowered, and after 30 seconds the standard bar The distance between the tip and the bottom plate was measured, and the amount of water at which the distance was 6 ± 1 mm (standard softness) was measured to obtain the standard soft water amount.
Claims (6)
- Sr含有量が0.02~0.06質量%であり、且つMo含有量が0.0002~0.0023質量%であるセメント組成物。 A cement composition having an Sr content of 0.02 to 0.06% by mass and an Mo content of 0.0002 to 0.0023% by mass.
- R2O含有量が0.3~0.6質量%である、請求項1記載のセメント組成物。 The cement composition according to claim 1, wherein the R 2 O content is 0.3 to 0.6 mass%.
- MgO含有量が0.7~1.8質量%であり、且つSO3含有量が1.6~2.5質量%である、請求項1又は2記載のセメント組成物。 The cement composition according to claim 1 or 2, wherein the MgO content is 0.7 to 1.8% by mass and the SO 3 content is 1.6 to 2.5% by mass.
- C3S含有量が45~70質量%、C2S含有量が5~25質量%、C3A含有量が6~15質量%及びC4AF含有量が7~15質量%である、請求項1~3のいずれか1項記載のセメント組成物。 The C 3 S content is 45 to 70% by mass, the C 2 S content is 5 to 25% by mass, the C 3 A content is 6 to 15% by mass, and the C 4 AF content is 7 to 15% by mass. The cement composition according to any one of claims 1 to 3.
- セメント組成物のSr含有量が0.02~0.06質量%であり、且つMo含有量が0.0002~0.0023質量%となるように、石灰石、硅石、石炭灰、粘土、高炉スラグ、建設発生土、下水汚泥、ハイドロケーキ及び鉄源からなる群より選ばれる原料の原料原単位を調整し、調整した原料を焼成してセメントクリンカーを製造する工程(A)と、セメントクリンカーと、石膏と、混合材として石灰石及び高炉スラグを粉砕する工程(B)を含むことを特徴とするセメント組成物の製造方法。 Limestone, meteorite, coal ash, clay, blast furnace slag so that the Sr content of the cement composition is 0.02 to 0.06 mass% and the Mo content is 0.0002 to 0.0023 mass%. Adjusting the raw material intensity of the raw material selected from the group consisting of construction generated soil, sewage sludge, hydrocake and iron source, and firing the adjusted raw material to produce a cement clinker (A), The manufacturing method of the cement composition characterized by including the process (B) which grind | pulverizes gypsum and limestone and blast furnace slag as a mixed material.
- 工程(A)におけるセメントクリンカー原料として、セメントクリンカー1トンあたり石灰石700~1400kg、硅石20~150kg、石炭灰0~300kg、粘土0~100kg、高炉スラグ0~100kg、建設発生土10~150kg、下水汚泥0~100kg、ハイドロケーキ0~100kg及び鉄源30~80kgを配合する、請求項5記載のセメント組成物の製造方法。 As raw materials for cement clinker in step (A), 700 to 1400 kg of limestone per ton of cement clinker, 20 to 150 kg of limestone, 0 to 300 kg of coal ash, 0 to 100 kg of clay, 0 to 100 kg of blast furnace slag, 10 to 150 kg of construction soil, sewage The method for producing a cement composition according to claim 5, wherein 0 to 100 kg of sludge, 0 to 100 kg of hydrocake and 30 to 80 kg of iron source are blended.
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JP2015081209A (en) * | 2013-10-22 | 2015-04-27 | 宇部興産株式会社 | Low hydration heat cement composition and manufacturing method therefor |
CN112960919A (en) * | 2021-01-28 | 2021-06-15 | 成都市嘉瑞云建材有限公司 | Method for preparing cement mixed material by using sand washing sludge |
CN115448622A (en) * | 2022-09-16 | 2022-12-09 | 大冶尖峰水泥有限公司 | Method for producing high-strength clinker by using high-sulfur high-magnesium limestone |
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JP2013107780A (en) * | 2011-11-17 | 2013-06-06 | Taiheiyo Cement Corp | Cement clinker and cement composition |
JP6061080B2 (en) * | 2012-12-28 | 2017-01-18 | 三菱マテリアル株式会社 | Hydraulic composition containing cerium and method for suppressing strength reduction thereof |
CN104909587A (en) * | 2015-05-13 | 2015-09-16 | 张芳 | Cement clinker |
CN105152593A (en) * | 2015-07-03 | 2015-12-16 | 枞阳县天筑新型建筑材料有限公司 | Thermal insulation mortar added with novel waterproof and dampproof synergist and preparation method thereof |
CN106630738B (en) * | 2016-12-07 | 2019-08-13 | 广西金洪混凝土有限公司 | High strength concrete admixture and the preparation method and application thereof |
CN107902928A (en) * | 2017-11-02 | 2018-04-13 | 马鞍山市宝奕金属制品工贸有限公司 | A kind of method that blast furnace cinder prepares cement |
JP6638842B1 (en) * | 2019-03-29 | 2020-01-29 | 住友大阪セメント株式会社 | Cement composition and method for producing cement composition |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010222171A (en) * | 2009-03-23 | 2010-10-07 | Taiheiyo Cement Corp | Cement clinker, method for producing the same and hydraulic cement |
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JP2010222171A (en) * | 2009-03-23 | 2010-10-07 | Taiheiyo Cement Corp | Cement clinker, method for producing the same and hydraulic cement |
JP2011099730A (en) * | 2009-11-05 | 2011-05-19 | Sumitomo Osaka Cement Co Ltd | Method for estimating blending of mortar or concrete |
Non-Patent Citations (1)
Title |
---|
CEMENT NO JOSHIKI, JAPAN CEMENT ASSOCIATION, November 1998 (1998-11-01), pages 13 - 14 * |
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JP2015081209A (en) * | 2013-10-22 | 2015-04-27 | 宇部興産株式会社 | Low hydration heat cement composition and manufacturing method therefor |
CN112960919A (en) * | 2021-01-28 | 2021-06-15 | 成都市嘉瑞云建材有限公司 | Method for preparing cement mixed material by using sand washing sludge |
CN115448622A (en) * | 2022-09-16 | 2022-12-09 | 大冶尖峰水泥有限公司 | Method for producing high-strength clinker by using high-sulfur high-magnesium limestone |
CN115448622B (en) * | 2022-09-16 | 2023-09-22 | 大冶尖峰水泥有限公司 | Method for producing high-strength clinker by utilizing high-sulfur high-magnesium limestone |
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