WO2018016780A1 - Mélange à résistance initiale élevée contenant un composé de calcium pour béton de ciment et son procédé de production - Google Patents

Mélange à résistance initiale élevée contenant un composé de calcium pour béton de ciment et son procédé de production Download PDF

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Publication number
WO2018016780A1
WO2018016780A1 PCT/KR2017/007260 KR2017007260W WO2018016780A1 WO 2018016780 A1 WO2018016780 A1 WO 2018016780A1 KR 2017007260 W KR2017007260 W KR 2017007260W WO 2018016780 A1 WO2018016780 A1 WO 2018016780A1
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weight
parts
cement concrete
crude steel
calcium
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PCT/KR2017/007260
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English (en)
Korean (ko)
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이용진
남흥식
노재국
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이지스 주식회사
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Publication of WO2018016780A1 publication Critical patent/WO2018016780A1/fr

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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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/06—Oxides, Hydroxides
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/045—Alkali-metal containing silicates, e.g. petalite
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/146—Silica fume
    • 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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/06—Oxides, Hydroxides
    • C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • 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
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/121—Amines, polyamines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to a crude steel mixture for cement concrete, and more particularly, to a crude steel mixture for cement concrete, which can produce a high early strength while using less cement than conventional cement by adding a crude steel mixture containing a calcium compound to the cement concrete mixture. It is about.
  • Korean Patent No. 10-120942 discloses a method of adjusting the strength by making the submixture concrete.
  • this has a problem in that the construction cost increases significantly with the increase in the material cost and the increase in the amount of additional aggregates, etc. according to the increase in the amount of cement.
  • Korean Patent No. 10-615826 discloses a coagulation-promoting admixture composition and an early strength-expressing concrete composition containing the same.
  • Such a concrete composition has a relatively low cost increase factor and can be easily applied.
  • the composition of the admixture is high, there is a high possibility of a change in physical properties, a performance deterioration, and a change in concrete properties (air volume, slump) and the supplier.
  • quality control is not easy in the field because of quality fluctuations.
  • the present invention has been made to improve the above problems, to provide a crude steel mixture for cement concrete that can maintain the early strength of the concrete even if the cement content, including calcium oxide, calcium hydroxide, calcium carbonate, etc.
  • the cement content including calcium oxide, calcium hydroxide, calcium carbonate, etc.
  • Another object of the present invention is to provide a method for producing the crude steel mixture for cement concrete.
  • a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof,
  • 0.1 to 200 parts by weight preferably 0.1 to 100 parts by weight, more preferably 0.1 to 50 parts by weight, even more preferably 0.1 to 200 parts by weight of a compound selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof 30 parts by weight,
  • dispersant 1 to 50 parts by weight of dispersant, preferably 5 to 30 parts by weight, and
  • 0.1 to 10 parts by weight preferably 0.5 to 10 parts by weight, more preferably 1 to 10 parts by weight, and more preferably 3 to 8 parts by weight, per 100 parts by weight of cement of cement concrete, to be coarse to the cement concrete. It is characterized by giving.
  • a hydration accelerator selected from the group consisting of acetates, formates, nitrates, nitrites, sulfates, thiosulfates, carbonates, chlorides, halides, alkanolamines, iron chlorides, calcium aluminate silicates, and mixtures of alkali or alkaline earth metals, Preferably an alkali metal or alkaline earth metal nitrate, more preferably 1 to 50 parts by weight, preferably 5 to 30 parts by weight of calcium nitrate may be further included.
  • It may further comprise 10 to 100 parts by weight, preferably 20 to 70 parts by weight of a silica compound selected from the group consisting of fly ash, bottom ash, silica fume, silica, silicate, water glass, slag and mixtures thereof.
  • a silica compound selected from the group consisting of fly ash, bottom ash, silica fume, silica, silicate, water glass, slag and mixtures thereof.
  • the calcium silicate hydrate may further comprise 0.1 to 20 parts by weight.
  • the average particle diameter of the calcium compound may be 0.01 to 100 ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the average particle diameter of the cement may be 0.01 to 100 ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the average particle diameter of the silica compound may be 0.01 to 100 ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the solid content of the crude steel mixture for cement concrete is 10 to 80% by weight, preferably 20 to 70% by weight, more preferably 30 to 60% by weight, more preferably 40 to 55% by weight, even more preferred Preferably from 45 to 55% by weight.
  • a humectant may be further included.
  • the thickener may further comprise 0.001 to 5 parts by weight, preferably 0.01 to 1 part by weight.
  • Antifoaming agent may further comprise 0.001 to 5 parts by weight, preferably 0.1 to 5 parts by weight.
  • the viscosity of the crude steel mixture for cement concrete may be 100 to 3000 cPs.
  • the annual viscosity change of the crude steel mixture for cement concrete may be 0 to 1000 cPs.
  • the pH of the crude steel mixture for cement concrete may be 10 to 14.
  • 0.1 to 200 parts by weight preferably 0.1 to 100 parts by weight, more preferably 0.1 to 50 parts by weight, even more preferably 0.1 to 200 parts by weight of a compound selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof 30 parts by weight,
  • dispersant 1 to 50 parts by weight of dispersant, preferably 5 to 30 parts by weight, and
  • Preparing a subject by mixing 50 to 600 parts by weight of water, preferably 150 to 450 parts by weight of water;
  • Preparing an adjuvant by mixing 1 to 50 parts by weight of water, preferably 10 to 50 parts by weight of water;
  • a compound selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof, a calcium compound, a dispersant and water and then a compound selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures and Grinding the calcium compound to an average particle diameter of 0.01 to 100 ⁇ m may further include.
  • the method may further comprise maintaining the mixture of the subject and the adjuvant at 5-100 ° C., preferably 60-80 ° C., for 0.5-24 hours, preferably 0.5-12 hours.
  • the mixing of the step (C) may be a dropwise addition of the subject to the supplement, or a dropping aid to the subject.
  • a hydration accelerator selected from the group consisting of acetates, formates, nitrates, nitrites, sulfates, thiosulfates, carbonates, chlorides, halides, alkanolamines, iron chlorides, calcium aluminate silicates, and mixtures of alkali or alkaline earth metals, Preferably an alkali metal or alkaline earth metal nitrate, more preferably 1 to 50 parts by weight, preferably 5 to 30 parts by weight of calcium nitrate may be further included.
  • It may further comprise 10 to 100 parts by weight, preferably 20 to 70 parts by weight of a silica compound selected from the group consisting of fly ash, bottom ash, silica fume, silica, silicate, water glass, slag and mixtures thereof.
  • a silica compound selected from the group consisting of fly ash, bottom ash, silica fume, silica, silicate, water glass, slag and mixtures thereof.
  • the calcium silicate hydrate may further comprise 0.1 to 20 parts by weight.
  • the cement can also be ground together, the average particle diameter of the cement after the grinding is 0.01 to 100 ⁇ m, It may be preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the silica compound when the calcium compound is pulverized, may also be pulverized together, and the average particle diameter of the silica compound after the pulverization is 0.01 to 100. ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the solid content of the crude steel mixture for cement concrete is 10 to 80% by weight, preferably 20 to 70% by weight, more preferably 30 to 60% by weight, more preferably 40 to 55% by weight, even more preferred Preferably from 45 to 55% by weight.
  • a humectant may be further included.
  • the thickener may further comprise 0.001 to 5 parts by weight, preferably 0.01 to 1 part by weight.
  • Antifoaming agent may further comprise 0.001 to 5 parts by weight, preferably 0.1 to 5 parts by weight.
  • the crude steel mixture for cement concrete of the present invention is characterized in that produced by the above method.
  • the present invention corresponds to the recycling of industrial by-products using calcium oxide, calcium hydroxide, calcium carbonate, etc., and can reduce the content of cement, thereby reducing costs and saving energy, and reducing the generation of carbon dioxide to reduce environmental pollution. It helps.
  • the present invention can be expressed in the early strength of the concrete even in the low cement content by using the crude steel mixture, can be expected to improve the work efficiency, such as shortening the construction period, generated by the use of recycled aggregates such as industrial by-products It can solve the problem of deterioration of concrete.
  • the crude steel mixture for cement concrete is a compound selected from the group consisting of calcium compounds, silicon, aluminum, iron, magnesium, oxides and mixtures selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof , Hydroxides of alkali or alkaline earth metals, triethanolamine or mixtures thereof, dispersants, and water.
  • the crude steel mixture for cement concrete contains 100 parts by weight of a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof, and selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof.
  • a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof, and selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof.
  • 0.1 to 200 parts by weight of the compound preferably 0.1 to 100 parts by weight, more preferably 0.1 to 50 parts by weight, even more preferably 0.1 to 30 parts by weight, the hydroxide of the alkali metal or alkaline earth metal, triethanolamine Or a mixture thereof, preferably 0.5 to 30 parts by weight, preferably 2 to 20 parts by weight of sodium hydroxide.
  • the crude steel mixture for cement concrete of the present invention is 0.1 to 10 parts by weight, preferably 0.5 to 10 parts by weight, more preferably 1 to 10 parts by weight, even more preferably 3 to 8 parts by weight of cement of cement concrete Mixing parts by weight imparts roughness to the cement concrete.
  • the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof activates a base during the coagulation and curing of cement to promote the formation of calcium silicate hydrate.
  • calcium oxide absorbs moisture and carbon dioxide and decomposes into calcium hydroxide and calcium carbonate.
  • the main feature of the present invention is to provide a crude steel mixture using inexpensive raw materials.
  • the calcium compound is low in purity and necessarily contains oxides of metals such as silicon, aluminum, iron, magnesium, and the like, and the content of these oxides is 0.1 to 200 parts by weight, preferably 0.1 to 100 parts by weight of the calcium compound. To 100 parts by weight, more preferably 0.1 to 50 parts by weight, even more preferably 0.1 to 30 parts by weight.
  • the content of the oxide is less than 0.1 parts by weight, it is not a raw material intended for the present invention because it is a high-purity raw material of high purity, not the low-cost raw materials mentioned above, and if the content is more than 200 parts by weight, the crude steel mixture is not manufactured and exhibits performance This is not done properly.
  • Hydroxide, triethanolamine, or mixtures of the alkali metal or alkaline earth metal, which is one of the main components constituting the crude steel mixture of the present invention, provide a basic environment necessary for condensation and curing of cement.
  • the content of these basic substances may be 0.5 to 30 parts by weight, preferably 2 to 20 parts by weight, per 100 parts by weight of the calcium compound. If the content of the basic material is less than 0.5 parts by weight, the production rate of the crude steel mixture of the present invention is too low to take too long time to produce, on the contrary, if it exceeds 30 parts by weight, it may be advantageous for the development of early strength, alkali aggregate reaction of concrete This can affect the workability and harden too quickly, resulting in poor workability, such as on-site casting.
  • the dispersant inhibits intergranulation of calcium compounds, metal oxides, basic materials, etc. constituting the crude steel mixture of the present invention, and allows the particles to be spaced apart from each other by using electrostatic or physical repulsive force. Through this, even strength is expressed in the entire area of the cement concrete, and it is possible to secure sufficient workability while reducing the amount of water to be blended.
  • the content of such a dispersant may be 1 to 50 parts by weight, preferably 5 to 30 parts by weight, per 100 parts by weight of the calcium compound. If the content of the dispersant is less than 1 part by weight, the viscosity of the crude steel mixture becomes too high, making it difficult to use.
  • the water content may be 50 to 600 parts by weight, preferably 150 to 450 parts by weight per 100 parts by weight of the calcium compound. If the content of the water is less than 50 parts by weight, the viscosity of the crude steel mixture is too high, making it difficult to use, on the contrary, if the content exceeds 600 parts by weight, not only does the increase in logistics costs but also phase separation between components of the crude steel mixture.
  • the crude steel mixture for cement concrete of the present invention per 100 parts by weight of the calcium compound, alkali metal or alkaline earth metal acetate, formate, nitrate, nitrite, sulfate, thiosulfate, carbonate, chloride, halide, alkanolamine, Hydration reaction accelerator selected from the group consisting of iron chloride, calcium aluminate silicate, and mixtures thereof, preferably nitrates of alkali or alkaline earth metals, more preferably 1 to 50 parts by weight of calcium nitrate, preferably 5 to 30 parts by weight. It may further comprise. When the content of the hydration reaction accelerator is within the above range, it is possible to secure an appropriate hydration reaction rate, thereby obtaining the desired early strength.
  • the hydration accelerator weakens the coating around the calcium silicate hydrate to promote the crystal growth and to facilitate the coagulation and curing of the cement. These compounds are activated by the aforementioned calcium compounds to participate in the reaction.
  • Such hydration reaction accelerators include sodium acetate, calcium acetate, potassium acetate, acetate, alkalolamine, formic acid, calcium formate, and formate, and the inorganic components include calcium nitrate, calcium nitrite, calcium chloride, calcium bromide, Calcium iodide, soluble calcium salt, iron chloride, magnesium chloride, sodium chloride, sulfate, potassium hydroxide, carbonate, thiosulfate, calcium aluminate silicate and the like.
  • the crude steel mixture for cement concrete of the present invention may further include 0.01 to 5 parts by weight of cement per 100 parts by weight of the calcium compound so that the crude steel performance can be expressed more quickly.
  • content of the said cement is in the said range, it becomes possible to express roughening performance more quickly as mentioned above.
  • the crude steel mixture for cement concrete of the present invention per 100 parts by weight of the calcium compound, fly ash, bottom ash, silica ash, silica fume, silica, in order to activate the base in the cement condensation and curing process to promote the formation of calcium silicate hydrate It may further comprise 10 to 100 parts by weight, preferably 20 to 70 parts by weight of the silica compound selected from the group consisting of silicate, water glass, slag and mixtures thereof. In addition, it may further comprise 0.1 to 20 parts by weight of calcium silicate hydrate per 100 parts by weight of the calcium compound for acting as a coagulation nucleus during the coagulation and curing of cement. When the content of the silica compound and the calcium silicate hydrate is within the above range, the reaction rate of the concrete can be properly maintained to obtain the desired early strength.
  • the average particle diameter of the calcium compound, cement and silica compound may be independently from each other 0.01 to 100 ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m. These particles have a fine size as described above, which leads to an increase in filling rate, which results in not only the early strength but also the compressive strength of the final concrete structure (mould).
  • the average particle diameter is within the above range, high strength can be expressed due to a high filling rate effect, and it is possible to prevent agglomeration and phase separation due to static electricity, thereby ensuring stability of the product.
  • the solid content of the crude steel mixture for cement concrete is 10 to 80% by weight, preferably 20 to 70% by weight, more preferably 30 to 60% by weight, more preferably 40 to 55% by weight, even more preferably May be 45 to 55% by weight. It is preferable that the solid content be within the above range while lowering the logistics cost while expressing the desired roughing performance.
  • the crude steel mixture for cement concrete may further comprise 0.001 to 5 parts by weight, preferably 0.01 to 1 part by weight of wetting agent per 100 parts by weight of the calcium compound.
  • the wetting agent is to reduce the surface tension of the particles to spread the water on the surface when the content is within the above range can ensure the appropriate range of steelmaking performance considering the economics.
  • the crude steel mixture for cement concrete may further comprise 0.001 to 5 parts by weight, preferably 0.01 to 1 part by weight of a thickener per 100 parts by weight of the calcium compound.
  • a thickener per 100 parts by weight of the calcium compound.
  • the crude steel mixture for cement concrete of the present invention may further comprise 0.001 to 5 parts by weight, preferably 0.1 to 5 parts by weight of the antifoaming agent per 100 parts by weight of the calcium compound.
  • the content of the antifoaming agent is within the above range, it is possible to suppress the decrease in strength due to bubbles in the cement concrete while taking into account economics.
  • the antifoaming agent is used to remove bubbles generated when mixing the components constituting the crude steel mixture for cement concrete of the present invention.
  • bubbles occur in the crude steel mixture for cement concrete, there may be a problem that the strength of the concrete is reduced.
  • the viscosity of the crude steel mixture for cement concrete may be 100 to 3000 cPs.
  • the viscosity is within the above range, it is possible to smoothly work while suppressing phase separation of the constituents, thereby ensuring an appropriate level of workability.
  • the annual viscosity change of the crude steel mixture for cement concrete may be 0 to 1000 cPs.
  • the annual viscosity change amount is less than 1000 cPs can be secured in the appropriate range of commerciality.
  • the pH of the crude steel mixture for cement concrete may be 10 to 14.
  • the pH is within the above range it is possible to express a high-speed hydration reaction is preferred.
  • the crude steel mixture of the present invention mixes 0.1 to 10 parts by weight, preferably 0.5 to 10 parts by weight, more preferably 1 to 10 parts by weight, and even more preferably 3 to 8 parts by weight per 100 parts by weight of cement of cement concrete. It is characterized by. If the amount of the cement is less than 0.1 parts by weight per 100 parts by weight of cement, the strength of the concrete is insignificant. On the contrary, if the amount exceeds 10 parts by weight, problems such as cracking and bleeding may occur due to the heat generation of the concrete.
  • A 100 parts by weight of a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof; 0.1 to 200 parts by weight, preferably 0.1 to 100 parts by weight, more preferably 0.1 to 50 parts by weight, even more preferably 0.1 to 200 parts by weight of a compound selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof 30 parts by weight; 1 to 50 parts by weight, preferably 5 to 30 parts by weight of a dispersant; And 50 to 600 parts by weight of water, preferably 150 to 450 parts by weight of water, to prepare a main body;
  • the method for producing a crude steel mixture for cement concrete comprises first silicon, aluminum, iron, magnesium, oxides and mixtures of 100 parts by weight of a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof.
  • a calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and mixtures thereof.
  • 100 parts by weight of the calcium compound selected from and 0.1 to 200 parts by weight preferably 0.1 to 100 parts by weight, more preferably 0.1 to 50 parts by weight of the compound selected from the group consisting of silicon, aluminum, iron, magnesium, oxides and mixtures thereof. And even more preferably 0.1 to 30 parts by weight.
  • the process starts with the preparation of the subject matter by mixing 1-50 parts by weight, preferably 5-30 parts by weight, and 50-600 parts by weight of water, preferably 150-450 parts by weight of the dispersant.
  • the calcium compound may further include grinding the calcium compound to an average particle diameter of 0.01 to 100 ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • hydroxides of alkali or alkaline earth metals, triethanolamine or mixtures thereof preferably 0.5 to 30 parts by weight of sodium hydroxide, preferably 2 to 20 parts by weight, water 1 To 50 parts by weight, preferably 10 to 50 parts by weight of the adjuvant is prepared.
  • the mixing may be dropwise addition of the topical to the adjuvant, or dropping adjuvant to the topical.
  • the step of maintaining the mixture of the subject and the adjuvant at 5 to 100 ° C., preferably 60 to 80 ° C. for 0.5 to 24 hours, preferably 0.5 to 12 hours It may include.
  • the holding temperature and the holding time are within the above range, the reaction can be sufficiently progressed while preventing the vaporization of water and maintaining the economic efficiency, thereby securing the performance and stability of the crude steel mixture of the present invention.
  • the method of manufacturing a crude steel mixture for cement concrete of the present invention per 100 parts by weight of the calcium compound, alkali metal or alkaline earth metal acetate, formate, nitrate, nitrite, sulfate, thiosulfate, carbonate, chloride, halogen Hydration reaction accelerator selected from the group consisting of cargoes, alkanolamines, iron chlorides, calcium aluminate silicates, and mixtures thereof, preferably nitrates of alkali or alkaline earth metals, more preferably 1 to 50 parts by weight of calcium nitrate, preferably May further comprise 5 to 30 parts by weight.
  • halogen Hydration reaction accelerator selected from the group consisting of cargoes, alkanolamines, iron chlorides, calcium aluminate silicates, and mixtures thereof, preferably nitrates of alkali or alkaline earth metals, more preferably 1 to 50 parts by weight of calcium nitrate, preferably May further comprise 5 to 30 parts
  • the method of manufacturing a crude steel mixture for cement concrete of the present invention may further include 0.01 to 5 parts by weight of cement per 100 parts by weight of the calcium compound in the subject.
  • the manufacturing method of the crude steel mixture for cement concrete of the present invention is silica selected from the group consisting of fly ash, bottom ash, silica fume, silica, silicate, water glass, slag and mixtures thereof per 100 parts by weight of the calcium compound on the subject.
  • the compound may further comprise 10 to 100 parts by weight, preferably 20 to 70 parts by weight.
  • the method of manufacturing a crude steel mixture for cement concrete of the present invention may further comprise 0.1 to 20 parts by weight of calcium silicate hydrate per 100 parts by weight of the calcium compound in the subject.
  • the method of manufacturing a crude steel mixture for cement concrete of the present invention during the production step of the main subject, when the calcium compound is pulverized with the cement, the average particle diameter of the cement after the pulverization is 0.01 to 100 ⁇ m, It may be preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the silica compound may also be pulverized together, and the average particle diameter of the silica compound after the pulverization is 0.01 to It may be 100 ⁇ m, preferably 0.01 to 50 ⁇ m, more preferably 0.01 to 30 ⁇ m.
  • the method of manufacturing a crude steel mixture for cement concrete of the present invention may further comprise 0.001 to 5 parts by weight, preferably 0.01 to 1 part by weight, of wetting agent per 100 parts by weight of the calcium compound.
  • the method for producing a crude steel mixture for cement concrete of the present invention may further comprise 0.001 to 5 parts by weight, preferably 0.01 to 1 part by weight, of thickener per 100 parts by weight of the calcium compound.
  • the method of manufacturing a crude steel mixture for cement concrete of the present invention may further include 0.001 to 5 parts by weight, preferably 0.1 to 5 parts by weight, of the antifoaming agent per 100 parts by weight of the calcium compound.
  • the crude steel mixture for cement concrete of the present invention is characterized in that produced by the above method.
  • a main body To 200 g of water, 150 g of hydrated lime, 20 g of calcium nitrate, and 7 g of a dispersant (EGIS, Korea) were added and ground to an average particle diameter of 5 mu m to prepare a main body. Auxiliaries were prepared by adding 15 g sodium hydroxide to 15 g water separately from the subject. The subject was placed in a flask, and the auxiliary agent was added dropwise, followed by stirring at 70 ° C. for 8 hours to prepare a crude steel mixture for cement concrete of the present invention.
  • EGIS dispersant
  • a main body 150 g of hydrated lime and 7 g of a dispersant (EGIS, Korea) were added and ground to an average particle diameter of 5 mu m to prepare a main body.
  • Auxiliaries were prepared by adding 15 g sodium hydroxide to 50 g water separately from the subject.
  • 20 g of calcium nitrate was added to 30 g of water, and ground to an average particle diameter of 5 ⁇ m to prepare an aqueous calcium nitrate solution.
  • the subject was placed in a flask, and the auxiliary agent and the calcium nitrate aqueous solution were added dropwise, followed by stirring at 70 ° C. for 8 hours to prepare a crude steel mixture for cement concrete of the present invention.
  • Cement mortar was prepared in the mixing ratio of Table 1 below. (Supervisor: Aegis, Korea)
  • the compressive strength of the cement mortar prepared in Preparation Examples 1 to 6 was measured according to the addition of the crude steel mixture. The measurement was carried out after curing for 24 hours at a temperature of 15 °C, 60% relative humidity, the results are shown in Table 2.
  • the compressive strength of the cement mortar prepared in Preparation Examples 1 to 6 was measured according to the curing temperature of the crude steel mixture. Measurement was made after curing for 24 hours at 60% relative humidity, the results are shown in Table 3.
  • Test Examples 1 and 2 showed that when the amount of cement was the same, a larger early compressive strength value was obtained by adding the crude steel mixture of the present invention.
  • Cement concrete was prepared in the mixing ratio of Table 4 below. (Supervisor: Aegis, Korea)
  • Test Example 3 showed that when the amount of cement was the same, a larger early compressive strength value was obtained by adding the crude steel mixture of the present invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

La présente invention concerne un mélange à résistance initiale élevée pour béton de ciment et son procédé de production, le mélange à résistance initiale élevée contenant un composé de calcium, un oxyde métallique, un hydroxyde d'un métal alcalin, etc., un dispersant et de l'eau. En outre, du fait qu'il contient un composé de calcium, etc., le mélange à résistance initiale élevée pour béton de ciment, selon la présente invention, est utile pour le recyclage industriel de sous-produits, est économique et peut permettre une économie d'énergie en permettant la réduction de la teneur en ciment, et est écologique en permettant l'atténuation de la pollution de l'environnement par réduction de la production de dioxyde de carbone. Grâce à son inclusion dans un mélange de béton de ciment, le mélange à résistance initiale élevée a pour effet de permettre au béton de ciment de présenter une résistance initiale plus élevée.
PCT/KR2017/007260 2016-07-18 2017-07-06 Mélange à résistance initiale élevée contenant un composé de calcium pour béton de ciment et son procédé de production WO2018016780A1 (fr)

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CN115231851A (zh) * 2022-07-22 2022-10-25 广西科达新材料集团有限公司 一种高强度混凝土早强剂及其制备方法
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