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WO2001072653A1 - Procede de fabrication d'un produit de scorie durci - Google Patents

Procede de fabrication d'un produit de scorie durci Download PDF

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Publication number
WO2001072653A1
WO2001072653A1 PCT/JP2001/002150 JP0102150W WO0172653A1 WO 2001072653 A1 WO2001072653 A1 WO 2001072653A1 JP 0102150 W JP0102150 W JP 0102150W WO 0172653 A1 WO0172653 A1 WO 0172653A1
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WO
WIPO (PCT)
Prior art keywords
slag
less
fly ash
blast furnace
mass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2001/002150
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English (en)
Japanese (ja)
Inventor
Hisahiro Matsunaga
Masato Takagi
Fumio Kogiku
Makiko Aikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of WO2001072653A1 publication Critical patent/WO2001072653A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C04B5/00—Treatment of  metallurgical  slag ; Artificial stone from molten  metallurgical  slag 
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00—Foundations for pavings
    • E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
    • 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
    • C04B18/142—Steelmaking slags, converter 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • C04B28/082—Steelmaking slags; Converter 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34—Non-shrinking or non-cracking materials
    • C04B2111/343—Crack resistant materials
    • 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 method for producing a hardened slag body, and particularly to a powdery and granular material that has been difficult to effectively use as a construction material, such as roadbed material, earth and wood, artificial stone, marine block, and other concrete substitutes.
  • the present invention relates to technology that uses hot metal pretreatment slag to increase the strength of the cured product after production and to reduce cracking. '' Background technology
  • the slag generated in the steelmaking process has a high basicity and contains a large amount of CaO in the form of a primary compound (hereinafter referred to as free CaO). For this reason, it easily absorbs moisture and expands, and is not suitable for use as civil engineering and construction materials such as blast furnace slag, and its treatment and utilization have been a problem for a long time. Therefore, in order to overcome this situation, some technological developments that actively utilize steelmaking slag have been attempted. In particular, attempts have been made to utilize steelmaking slag in combination with silica-containing materials such as blast furnace slag.
  • Japanese Patent Application Laid-Open No. Hei 10-152,364 discloses that among aggregates containing steelmaking slag, silicide-containing substances having latent hydraulic properties, and silicide-containing substances having pozzolan reactivity, one of them is disclosed. Disclosed is a hydrated cured product produced by mixing 50% or more of a kind or two kinds with a binder that is cured by a hydration reaction. Also, Japanese Patent Application Laid-Open No. Hei 2-32359 discloses a steel slag obtained by pulverizing and crushing all of the binder, fine aggregate and coarse aggregate, and blast furnace slag and steelmaking slag as the binder. Made using mixed steel slag The disclosed slag block is disclosed.
  • the converter slag is ground to 5 mm or less, then magnetically separated, dried, and ground to 3000 to 5000 cm 2 / g.
  • An example of blast furnace cement using converter slag in which powder is mixed with 10 to 30% by weight is disclosed.
  • a steelmaking slag containing 50% by weight or more of steelmaking slag with a particle diameter of 5 mm or less and EPO 2 ⁇ 30 wt% in EP09941966A1.
  • Japanese Unexamined Patent Publication No. 59-169696 discloses a roadbed material in which 10 to 60% by weight of converter slag dust is added to and mixed with granulated blast furnace slag at an absolute dry weight ratio.
  • ⁇ hot metal pretreatment '' means that before hot metal is refined in a converter, various refining agents are added to the hot metal before being supplied to the converter to perform processes such as desiliconization, desilition, and desulfurization. Say you do.
  • the slag generated by this pretreatment is called “hot metal pretreatment slag” and is included in the category of steelmaking slag.
  • expressions such as “de-Si slag”, “de-P slag”, and “de-S slag” occur when hot metal is de-Si pre-treated, de-P pre-treated, and de-S pre-treated, respectively. Means slag.
  • an object of the present invention is to propose a method of manufacturing a hardened slag that does not cause insufficient strength or cracking of a manufactured hardened body even when steelmaking slag is used as a part of a raw material.
  • the present invention provides: (a) hot metal pretreatment slag having a particle size of 1.18 mm or less: 15 to 55 mass ° /. , And (b) Blast furnace slag having a particle size of 0.1 or less: This is a method for producing a hardened slag that is kneaded with water and hardened after mixing with 5 to 40 mass%.
  • the mass ratio of the hot metal pretreatment slag is more than 0.2.
  • the content described above may further include an oxide, a hydroxide, a sulfate, and a chloride of an alkali metal. Things, and Al power At least one selected from the group consisting of oxides, hydroxides, sulfates and chlorides of alkaline earth metals is added to the blast furnace slag and fly ash in an amount of 0.2 to 20 mass%. % Is preferably added.
  • At least one selected from the group consisting of naphthalenesulfonic acids and polycarboxylic acids is further added to the contents described in the above-mentioned blast furnace slag, fly ash and It is preferable to add 0.1 to 2.0 mass% to the total of the slag of the hot metal pretreatment with a particle size of 0.1 mm or less.
  • hot metal pretreatment slag is used as steelmaking slag for the following reasons. That is,
  • the hot metal pre-treatment slag is fine powder, the hydration reaction between the hot metal pre-treatment slag and the above-mentioned blast furnace slag fine powder and fly ash becomes easier, and higher strength can be achieved. .
  • the present inventors investigated in detail what particle size of the hot metal pretreatment slag greatly contributes to the hardening reaction. As a result, it has been found that those having a particle size of 1.18 mm or less have good reactivity, increase the strength of the obtained cured product, and significantly reduce the occurrence of cracks. Therefore, in the present invention, the content of the slag having a particle size of 1.18 mm or less contained in the hot metal pre-treatment slag is particularly limited among all the compounds except water. Of these, the more preferred particle size is 0.425 mm or less, and the more preferred particle size is 0 :! 00.425 mm or less.
  • Hot metal pretreated slag with a large particle size simply means that it was difficult to grind in the pulverization process.It itself has a certain level of strength, and is used as a bulking agent because of its high activity. Will also contribute.
  • the particle size referred to in the present application is a numerical value obtained by a sieving test, and can be measured by a method such as JISA1102, JISAll03.
  • a steelmaking slag which has almost no free MgO phase is used, and the amount thereof is limited to an appropriate range. Will not occur.
  • the hardened slag produced has not only high strength but also no cracks. Furthermore, cracks due to drying shrinkage of the hardened slag hardly exist.
  • the Sio 2 -containing substance that reacts with the slag is also blended in an appropriate amount. .
  • Such S i 0 2 containing materials are those having a latent hydraulic or pozzolanic reactivity are preferred.
  • blast furnace slag fine powder alone or a mixture of blast furnace slag fine powder and fly ash.
  • the blast furnace slag fine powder referred to in the present application has a particle size of 0.1 mm or less, preferably 0.07 mm or less, that is, a specific surface area by a plain method: 3000 to 5000 cm 2 / g. It is.
  • blast furnace slag fine powder granulated blast furnace slag is suitably used.
  • the particle size of the blast furnace slag is set to 0.1 mm or less because if it exceeds 0.1 mm, the reactivity with the steelmaking slag and fly ash becomes low.
  • fly ash referred to in the present application is a substance containing SiO 2 that is latently hydraulic or pozzolanic, like blast furnace slag fine powder, and is generated by burning coal.
  • the particle size of fly ash is not limited in the present application, it is generally 0.2 mm or less, that is, it corresponds to a specific surface area of 1500 cm 2 / g or more according to the Blaine method. is there.
  • blast furnace slag with a particle size of 0.1 mm or less If this is used instead of a part of blast furnace slag with a particle size of 0.1 mm or less, the reactivity with hot metal pre-treatment slag will be further improved, and the occurrence of cracks in the hardened body will be suppressed and after long-term curing. Can be improved in strength. If blast furnace slag with a particle size of 0.1 mm or less is used alone, it should be properly contained. The amount is 5 to 40 mass%.
  • the content of hot metal pre-treated slag with a grain size of 1.18 mm or less is less than 15 mass%, or the content of blast furnace slag with a grain size of 0.1 mm or less is 40 mass. /.
  • the content of hot metal pre-treated slag with a particle size of 1.18 mm or less is 55 mass. /.
  • the first invention of the present application provides (a) hot metal pretreatment slag having a grain size of 1.18 mm or less: 15 to 55 mass%, and (b) blast furnace slag having a grain size of 0.1 thigh or less: A product containing 5 to 40 mass% is kneaded with water, and then cured by a method for producing a cured slag.
  • the amount of water and the stirring means are not particularly limited. However, in order to promote the hydration reaction between the slags, it is preferable to form a slurry, and when the slurry is formed into a slurry, fluidity is imparted, so that the forming operation becomes easy.
  • the raw material slags of the present invention are all fine powders, and it is most suitable to form a slurry with water, put into a molding die, and hydrate and harden. However, this does not preclude the use of cake-shaped or molded products.
  • a suitable amount of water used to make the composition of the present invention into a slurry is 6 wt% or more, more preferably 8 to 13 wt%, based on the composition.
  • the amount of water is about 4 to 8 wt% based on the composition, a slump cake of less than 3 cm is formed.
  • the ratio of fly ash content to the total content of blast furnace slag and fly ash with a content of 1.5 mass% or more and a particle size of 0.1 mm or less is expressed as a mass ratio.
  • fly ash hardens at room temperature at lower temperatures than blast furnace slag fine powder, and has a fly ash content exceeding 30 mass% or a particle size of 0.1 dragon or less. If the mass ratio of the fly ash content to the total content of fly ash exceeds 0.75, the curing of the slag cured product as a whole is undesirably delayed. Therefore, the content of fly ash is 1.5 to 30 mass. /.
  • the fly ash content ratio is 0.1 to 0.75 in mass ratio.
  • the ratio of the content of the hot metal pre-treatment slag to the total content of the blast furnace slag having a particle size of 0.1 mm or less, the fly ash, and the hot metal pre-treatment slag having a particle size of 1.18 mm or less is a mass. More preferably, the ratio is more than 0.2.
  • the present invention improves the strength of the produced cured product and significantly reduces the occurrence of cracks by the above-mentioned composition.
  • selected from the group consisting of alkali metal oxides, hydroxides, sulfates and chlorides, and alkaline earth metal oxides, hydroxides, sulfates and chlorides It is preferable to add at least one of 0.2 to 20 mass% to the total content of blast furnace slag and fly ash having a particle size of 0.1 mm or less.
  • At least one selected from the group consisting of naphthalene sulfonic acids and polycarboxylic acids is used for blast furnace slag with a particle size of 0.1 mm or less, british slag, and hot metal pretreatment slag with a particle size of 0.1 mm or less. It is also preferable to add 0 :! to 2.0 mass% based on the total content of
  • the addition of 2 raass% or more makes it possible to accelerate the hardening of the hardened slag and shorten the time required for curing. However, the effect is saturated even if it is added in excess of 20 mass%, so the upper limit is preferably set to 20 mass%.
  • Preferred as such compounds are C a (OH) 2 , N a O H, C a O, C a SO 4 ⁇ 211 2 0 Oyopiji a C 1 2 and which may or may not be also Then added naphthalenesulfonic acids and or polycarboxylic acids, ⁇ when kneading raw materials with water The performance is improved. Therefore, the amount of water required for kneading can be reduced, and as a result, a cured product having higher strength can be obtained. At that time, 0.1 the amount relative to the total content of the following blast furnace slag ⁇ Pi fly ash particle size 0.1 mm mass e /.
  • Preferred examples of the naphthalene sulfonates include Cellflow 110 manufactured by K & D Fine Chemical Co., Ltd., and Sunflow H-60 manufactured by Sunflow Co., Ltd.
  • Preferred examples of polycarboxylic acids include Darrex Super 200 manufactured by Grace Chemicals Co., Ltd.
  • Table 1 summarizes the compositions of the hot metal pretreatment slag and converter slag used.
  • Pre-processed slag pulverized as compounding material blast furnace slag pulverized to a particle size of 0.1 mm or less (specific surface area of 4000 cmVg by plain method), and kneaded Ca (OH) 2 with water, slump 3 ⁇ It was 25 cm and poured into the formwork. After 1 to 2 B, the mold was released, and this was cured in water at 20 ° C to obtain a hard Eich body.
  • Table 2 shows the content, ratio, and amount of kneading water added for each compounded raw material.
  • Table 3 shows the strength of the obtained cured product after 28 days of curing, the specific gravity of the surface dryness, the number of surface cracks, and the strength after 91 days of curing.
  • A, B, C, and D are values indicating the mixing ratio of each raw material, and the same applies to the following examples.
  • Example 2 Pre-treated slag of hot metal pulverized as a compounding raw material, blast furnace slag finely pulverized to a particle size of 0.1 mm or less (specific surface area 4000 cm 2 / g by the Blaine method), fly ash (JIS standard type II) and C a (OH) 2
  • the mixture was kneaded with water to make a slump of 3 25 cm and poured into a mold. After 12 days, the mold was released and cured in water at 20 ° C to obtain a cured product.
  • Tables 4 and 5 show the content, ratio, and addition amount of kneading water for each compounded raw material.
  • Tables 6 and 7 collectively show the strength of the obtained cured product after curing for 28 days, the surface dry specific gravity, the number of surface cracks, and the strength after curing for 91 days.
  • Hot metal pretreated slag pulverized as compounding raw material, blast furnace slag finely pulverized to a particle size of 0.1 or less (specific surface area 4000 cm 2 / g by the Blaine method), and fly ash (JIS type III) ⁇ C a (OH) 2 was blended under a content rate condition outside the limited range of the present invention, and they were kneaded with water and poured into a mold. After 12 days, the mold was released and cured in water at 20 ° C to obtain a cured product.
  • Table 14 shows the content, ratio, and amount of kneading water added for each compounded raw material. Strength of the obtained cured product after curing for 28 days, surface specific gravity, number of surface cracks, and strength after curing for 91 days The degrees are collectively shown in Table 15.
  • Comparative Example 1 in which the content of the hot metal pretreated slag having a particle size of 1.18 mm or less did not satisfy the conditions of the present invention, the hardened slag produced had surface cracks after curing for 28 days. 3 lines / cm 2 occurred. Also, the abrasion resistance was poor, and the cured product cracked or chipped during handling. On the other hand, in the examples of the present invention, the surface cracks of all the cured products are 0.5 cm 2 or less, and the cracks are extremely small. In addition, there were no problems of wear resistance, cracking or chipping during handling.
  • the mass ratio of blast furnace slag and fly ash with a particle size of 0.1 mm or less and hot metal pre-treatment slag to the total amount of hot metal pre-treatment slag with a particle size of 0.425 mm or less (the ratio indicated by C in the table)
  • Example Nos. 1-9 to 1-21 of the present invention in which the force is too high, the number of cracks in the cured product is further reduced to 0.3 / cm 2 or less.
  • Example 2 in which fly ash was added in addition to blast furnace slag having a particle size of 0.1 mm or less, the number of cracks in the cured product was further reduced.
  • Comparative Example 4 is a cured product produced according to the blending amount and particle size corresponding to the examples described in JP-A-2-233359, but after 60 days, free MgO was obtained. Collapsed due to swelling caused by the hydration reaction. Comparative Example 6 was prepared according to the blending amount and particle size equivalent to the examples described in JP-A-10-152364, but the hydration of free CaO was observed after 35B. It collapsed due to swelling caused by the reaction.
  • B [Slag of hot metal pre-treatment slag of less than 1.18 mm / (blast furnace slag of 0.1 mm or less + fly ash + hot metal of pre-treatment slag of less than 1.18 mm 'slag)
  • C [Hot metal pre-treatment slag of 0.425 mm or less Blast furnace slag + Fly ash + Hot metal pre-treatment slag of 0.425mm or less
  • D [Metal hot metal pre-treatment slag of 0.1mm or less / (Blast furnace slag of 0.1mm or less + Fly ash + Hot metal pre-treatment slag of 0.1mm or less)
  • the present invention makes it possible to obtain a hardened slag having high strength and almost no cracks in the surface layer, even when steelmaking slag, which has conventionally had a problem in its use, can be obtained.
  • the hardened slag can be used as roadbed material, earth and wood, artificial stone, marine blocks, and other concrete substitutes, the present invention greatly contributes to resource recycling and environmental improvement. It is.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Processing Of Solid Wastes (AREA)
  • Road Paving Structures (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un produit de scorie durci, consistant à : élaborer un mélange contenant 15 à 55 % en masse d'une scorie issue d'une étape de prétraitement de métal chaud et dont le diamètre de particule est égal ou inférieur à 1,18 mm, et 5 à 40 % en masse d'un laitier de haut fourneau dont le diamètre de particule est égal ou inférieur à 0,1 mm ; malaxer le mélange avec de l'eau et faire réticuler le produit ainsi malaxé. L'invention concerne également un procédé mieux adapté, consistant à : élaborer un mélange contenant 15 à 55 % en masse d'une scorie issue d'un procédé de prétraitement de métal chaud et dont le diamètre de particule est égal ou inférieur à 1,18 mm, 3 à 36 % en masse d'un laitier de haut fourneau dont le diamètre de particule est égal ou inférieur à 0,1 mm, et 1,5 à 30 % en masse de cendre légère, le rapport de masse entre la cendre légère et la somme du laitier de haut fourneau avec la cendre légère étant de 0,1 à 0,75 ; malaxer le mélange avec de l'eau et faire réticuler le produit ainsi malaxé. Ces deux procédés mettent en oeuvre une scorie issue d'un procédé d'aciérie et permettent de fabriquer un produit de scorie durci, qui a une résistance satisfaisante et qui est exempt de criquement superficiel. Ce produit de scorie durci peut être utilisé comme matériau de soubassement d'une chaussée, comme matériau de construction, comme matériau de génie civil ou comme substitut du béton.
PCT/JP2001/002150 2000-03-28 2001-03-19 Procede de fabrication d'un produit de scorie durci Ceased WO2001072653A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-88858 2000-03-28
JP2000088858A JP3654122B2 (ja) 2000-03-28 2000-03-28 スラグ硬化体の製造方法

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WO2001072653A1 true WO2001072653A1 (fr) 2001-10-04

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JP (1) JP3654122B2 (fr)
KR (1) KR100577879B1 (fr)
CN (1) CN100360450C (fr)
TW (1) TWI241997B (fr)
WO (1) WO2001072653A1 (fr)

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AU2019314882B2 (en) * 2018-07-31 2021-12-23 Katholieke Universiteit Leuven Fe-rich binder

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JP4644965B2 (ja) * 2001-04-11 2011-03-09 Ｊｆｅスチール株式会社 スラグ硬化体の製造方法
JP2005231947A (ja) * 2004-02-19 2005-09-02 Nippon Magnetic Dressing Co Ltd 製鋼スラグの骨材化処理方法
JP4882258B2 (ja) * 2005-03-30 2012-02-22 Ｊｆｅスチール株式会社 耐塩害性に優れた鉄筋を有する水和硬化体
JP4882259B2 (ja) * 2005-03-30 2012-02-22 Ｊｆｅスチール株式会社 耐塩害性に優れた鉄筋を有する水和硬化体
JP4882257B2 (ja) * 2005-03-30 2012-02-22 Ｊｆｅスチール株式会社 耐塩害性に優れた鉄筋を有する水和硬化体
JP4827548B2 (ja) * 2006-02-10 2011-11-30 Ｊｆｅスチール株式会社 水和硬化体
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