WO2022044890A1 - Composition de ciment, son procédé de production, procédé pour l'inhibition de la carbonatation de béton armé ferraillé par addition de ladite composition de ciment et procédé pour le maintien d'un bel aspect de surface de béton armé ferraillé par addition de ladite composition de ciment - Google Patents

Composition de ciment, son procédé de production, procédé pour l'inhibition de la carbonatation de béton armé ferraillé par addition de ladite composition de ciment et procédé pour le maintien d'un bel aspect de surface de béton armé ferraillé par addition de ladite composition de ciment Download PDF

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WO2022044890A1
WO2022044890A1 PCT/JP2021/030074 JP2021030074W WO2022044890A1 WO 2022044890 A1 WO2022044890 A1 WO 2022044890A1 JP 2021030074 W JP2021030074 W JP 2021030074W WO 2022044890 A1 WO2022044890 A1 WO 2022044890A1
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cement composition
cement
reinforced concrete
sio
hydraulic compound
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PCT/JP2021/030074
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English (en)
Japanese (ja)
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泰一郎 森
拓海 前田
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デンカ株式会社
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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
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/08—Acids or salts thereof
    • 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
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

Definitions

  • the present invention relates to a cement composition used in the fields of civil engineering, construction, etc.
  • Ultra-fast hard cement hardens in a short time and has excellent initial strength development, so it is used for emergency repair work and construction in cold regions.
  • As ultrafast-hardening cement cement in which a hard-hardening material such as amorphous calcium aluminate is mixed with Portland cement and ultrafast-hardening cement having a special clinker composition are known.
  • the ultrafast-hardening cement having a special clinker composition specifically contains compounds such as calcium fluoroaluminate (C11 A7 / CaF 2 ) and elimite ( 3CaO / 3Al2O3 / CaSO4 ) as the main components. do.
  • compounds such as calcium fluoroaluminate (C11 A7 / CaF 2 ) and elimite ( 3CaO / 3Al2O3 / CaSO4 ) as the main components. do.
  • SAC calcium sulfate cement
  • Patent Document 1 proposes a cement composition containing elimite heat-treated in a carbon dioxide gas atmosphere, and by using the cement composition, the amount of CO 2 emitted during production is smaller than before. It is described that the curing time can be shortened and the fluctuation of the curing time is reduced even if it is stored for a long period of time.
  • Patent Document 2 ⁇ -2CaO ⁇ SiO 2 ( ⁇ -C 2 S), one or two kinds of steelmaking slag powder, and Portland cement are contained as powder components, and ⁇ accounts for the above total content.
  • a concrete kneaded product having a composition in which the total of -C 2S and steelmaking slag powder is 25 to 95% by mass and the water-cement ratio W / C is 80 to 250 % by mass has been proposed.
  • Precast concrete with significantly reduced total CO 2 emissions compared to conventional general concrete by utilizing the reduction of CO 2 emissions by controlling the amount of cement used and the absorption of CO 2 by carbonation curing. It states that the product has become feasible.
  • Patent Document 1 and Patent Document 2 do not disclose this neutralization at all. Further, when the cured product is formed, a powder blowing phenomenon due to elimite may occur, and it is preferable to reduce such a phenomenon from the viewpoint of maintaining the aesthetic appearance.
  • the present invention has been made to solve the above-mentioned problems, maintains good strength, exhibits excellent neutralization resistance, and reduces powder blowing when made into a cured product. It is an object of the present invention to provide a cement composition which can be produced.
  • the present inventors have found a cement composition containing a specific non-hydraulic compound and sulfoaluminate cement and containing the non-hydraulic compound in a predetermined ratio.
  • the present invention is as follows.
  • One or more non-hydraulic compounds selected from the group consisting of ⁇ -2CaO ⁇ SiO 2 , 3CaO ⁇ 2SiO 2 , ⁇ -CaO ⁇ SiO 2 , and calcium magnesium silicate, and sulfate cement.
  • the mass ratio of the non-hydraulic compound to the elimite contained in the sulfate cement and the non-hydraulic compound (non-hydraulic compound / (non-hydraulic compound + elimite) ⁇ 100) is 10 to 90 mass. %.
  • [3] The cement composition according to [1] or [2], wherein the non-hydraulic compound is ⁇ -2CaO ⁇ SiO 2 .
  • [4] The method for producing a cement composition according to any one of [1] to [3], wherein the non-hydraulic compound and the sulfate cement are simultaneously pulverized and mixed.
  • a method for producing a cement composition including.
  • [5] A method for suppressing neutralization of reinforced concrete, which comprises the cement composition according to any one of [1] to [3] as the cement composition constituting the reinforced concrete.
  • [6] A method for preserving the surface aesthetics of reinforced concrete, which comprises the cement composition according to any one of [1] to [3] as the cement composition constituting the reinforced concrete.
  • the cement composition according to the present embodiment is one or more non-hydraulic compounds selected from the group consisting of ⁇ -2CaO ⁇ SiO 2 , 3CaO ⁇ 2SiO 2 , ⁇ -CaO ⁇ SiO 2 , and calcium magnesium silicate. And contains sulfated cement. Good strength can be maintained by combining a non-hydraulic compound with a sulfoluminate cement. In addition, the carbonation reaction promotes densification of the non-hydraulic compound. In particular, when the content of the non-hydraulic compound is 5 to 40%, excellent neutralization resistance, which is one of the effects of promoting carbonation (salt), is exhibited.
  • ⁇ -2CaO ⁇ SiO 2 is a compound represented by 2CaO ⁇ SiO 2 , which is known as a low temperature phase, and is a high temperature phase ⁇ -2CaO ⁇ SiO 2 or ⁇ '-2CaO ⁇ SiO 2 , It is completely different from ⁇ -2CaO ⁇ SiO 2 . All of these are represented by 2CaO ⁇ SiO 2 , but their crystal structures and densities are different.
  • 3CaO ⁇ 2SiO 2 ) 3CaO ⁇ 2SiO 2 is a mineral containing CaO in pseudo-calcium ash and is called lanquinite. Although it is a chemically stable mineral with no hydration activity, it has a large effect of promoting carbonation (saltation).
  • ⁇ -CaO ⁇ SiO 2 ⁇ -CaO ⁇ SiO 2 ( ⁇ -type wallastnite) is a compound represented by CaO ⁇ SiO 2 , which is known as a high temperature phase, and ⁇ -CaO ⁇ SiO 2 which is a low temperature phase. It's completely different. All of these are represented by CaO ⁇ SiO 2 , but their crystal structures and densities are different.
  • the naturally occurring wallastnite is ⁇ -CaO ⁇ SiO 2 in the low temperature phase.
  • ⁇ -CaO ⁇ SiO 2 has needle-like crystals and is used as an inorganic fibrous substance such as wallastonite fiber, but carbonic acid (such as ⁇ -CaO ⁇ SiO 2 according to the present embodiment). There is no effect of promoting salting.
  • Calsim magnesium silicate is a general term for CaO-MgO-SiO 2 compounds, but in the present embodiment, it is Merwinite represented by 3CaO ⁇ MgO ⁇ 2SiO 2 (C 3 MS 2 ).
  • C 3 MS 2 Merwinite represented by 3CaO ⁇ MgO ⁇ 2SiO 2
  • a large carbonation (salt) promoting effect is achieved.
  • the non-hydraulic compound as described above may be one kind or two or more kinds, but contains 5 to 40% in the cement composition. If it is less than 5%, the neutralization suppressing effect and the surface aesthetic retention effect cannot be imparted, and if it exceeds 40%, the initial strength development is lowered.
  • the content of the non-hydraulic compound in the cement composition is preferably 7 to 35%, more preferably 10 to 30%. When there are two or more types of non-hydraulic compounds, the above-mentioned content means the total amount of two or more types of non-hydraulic compounds.
  • ⁇ -2CaO ⁇ SiO 2 in particular has a pulverization phenomenon called dusting at the time of production, so that it requires less energy for pulverization than other compounds, and is carbonated (salted) for a long period of time. It is preferable in that it has a large promoting effect and a large neutralization suppressing effect.
  • the content of ⁇ -2CaO / SiO 2 in the non-hydraulic compound is preferably 25% or more, more preferably 30% or more.
  • the non-hydraulic compound according to the present embodiment is obtained by appropriately blending a CaO raw material, a SiO 2 raw material, an MgO raw material and the like in a predetermined molar ratio and heat-treating.
  • the CaO raw material include calcium carbonate such as limestone, calcium hydroxide such as slaked lime, acetylene by-product slaked lime, and fine powder generated from waste concrete lumps.
  • the SiO 2 raw material include silica stone and clay, and various silica dusts generated as industrial by-products such as silica fume and fly ash.
  • the MgO raw material include magnesium hydroxide, basic magnesium carbonate, dolomite and the like.
  • the heat treatment method is not particularly limited, but can be performed by, for example, a rotary kiln or an electric furnace.
  • the heat treatment temperature is not uniquely determined, but is usually carried out in the range of about 1,000 to 1,800 ° C., and is often carried out in the range of about 1,200 to 1,600 ° C.
  • an industrial by-product containing the above-mentioned non-hydraulic compound can also be used.
  • impurities coexist.
  • industrial by-products include steelmaking slag and the like.
  • the CaO raw material, the SiO 2 raw material, and the MgO raw material may contain impurities, but this does not cause any particular problem as long as the effects of the present invention are not impaired.
  • impurities include, for example, Al 2 O 3 , Fe 2 O 3 , TiO 2 , MnO, Na 2 O, K 2 O, S, P 2 O 5 , F, B 2 O 3 , fluorine, chlorine and the like.
  • the coexisting compounds include free calcium oxide, calcium hydroxide, calcium aluminate, calcium aluminosilicate, calcium ferrite, calcium aluminoferrite, calcium phosphate, calcium borate, magnesium silicate, and leucite ( K2O, Na 2 ) .
  • O) ⁇ Al 2 O 3 ⁇ SiO 2 , spinel MgO ⁇ Al 2 O 3 and magnetite Fe 3 O 4 and the like can be mentioned.
  • hydraulic 2CaO / SiO 2 can be mixed in the cement composition, and can be mixed up to 35%.
  • Examples of the method for quantifying the non-hydrophilic compound include a method of identifying the crystal phase by the powder X-ray diffraction method and then calculating each crystal phase from the chemical analysis value, and a Rietveld method by the powder X-ray diffraction method. ..
  • the specific surface area of the brain of the non-hydraulic compound is not particularly limited, but is preferably 1,500 cm 2 / g or more, and the upper limit is preferably 8,000 cm 2 / g or less. Among them, 2,000 to 6,000 cm 2 / g is more preferable, and 3,000 to 6,000 cm 2 / g is most preferable.
  • the brain specific surface area is 2,000 cm 2 / g or more, good material separation resistance is obtained, and the carbonation (salting) promoting effect is sufficient. Further, when it is 8,000 cm 2 / g or less, the crushing power at the time of crushing is not increased and it is economical, and weathering is suppressed and deterioration of quality with time can be suppressed.
  • the non-hydraulic compound is ⁇ -2CaO ⁇ SiO 2 , it is particularly preferably 2,000 to 3,800 cm 2 / g, and 3,000 to 3,800 cm 2 / g in the above range. It is more preferably g.
  • Sulfoaluminate cement is obtained by mixing calcia raw material , alumina raw material, sulfur trioxide raw material, etc., and firing it in a kiln, or melting and cooling it in an electric furnace. It is a hydraulic cement crushed by adding an appropriate amount of limestone and gypsum to a clinker containing 2CaO / SiO 2 (Blite) as the main components. It is a cement specified in.
  • Sulfoaluminate cement is classified into hard-hardening type sulfoaluminate cement, low-alkali type sulfoaluminate cement, and self-stress type sulfoaluminate cement, and commercially available ones can be used.
  • a part of CaO and Al2O3 of the sulfoaluminate cement is an alkali metal oxide, an alkaline earth metal oxide, silicon oxide, titanium oxide, iron oxide, an alkali metal halide, and the like.
  • Compounds substituted with alkaline earth metal halides, alkali metal sulfates, alkaline earth metal sulfates, etc., or compounds containing CaO and Al2O3 as main components , in which a small amount of these are solid-dissolved are also available. Can be used.
  • the particle size of the sulfoluminate cement is preferably a brain specific surface area of 3,000 cm 2 / g or more, and more preferably 3,500 cm 2 / g or more in terms of initial strength development. If it is less than 3,000 cm 2 / g, the curing time becomes long and the initial strength development may decrease.
  • the mass ratio of the non-hydraulic compound to the elimite and the non-hydraulic compound contained in the sulfoluminate cement (non-hydraulic compound / (non-hydraulic compound + elimite) x 100) has the effect of suppressing neutralization and the surface aesthetics. From the viewpoint of the retention effect, it is preferably 10 to 90%, more preferably 20 to 80%.
  • the content of sulfate cement in the cement composition of the present embodiment is preferably 50% or more, more preferably 60 to 95%, from the viewpoint of initial strength development.
  • the amount of water used for the cement composition of the present embodiment is not particularly limited, and a normal range of use is used. Specifically, the amount of water is preferably 25 to 60 parts with respect to a total of 100 parts of the cement and the present admixture. Sufficient workability can be obtained when the amount is 25 parts or more, and strength development and carbonation (salting) promoting effect can be sufficiently obtained when the amount is 60 parts or less.
  • the particle size of the cement composition of the present embodiment is not particularly limited because it depends on the purpose and use of use, but usually, the brain specific surface area is preferably 2,500 to 8,000 cm 2 / g, and 3, More preferably, 000 to 6,000 cm 2 / g. When it is 2,500 cm 2 / g or more, sufficient strength development can be obtained, and when it is 8,000 cm 2 / g or less, workability can be improved.
  • aggregates such as sand and gravel, blast furnace granulated slag fine powder, blast furnace slow cooling slag powder, limestone fine powder, fly ash, and admixture materials such as natural pozzolan such as silica fume and volcanic ash, expansion.
  • the object of the present invention is substantially the same. It can be used within a range that does not inhibit the slag.
  • the cement composition of the present embodiment contains the above aggregate, the aggregate (more specifically, sand or gravel having a maximum particle size of 5 mm or less) in the cement composition may be 95% or less. It is preferably 90% or less, and more preferably 90% or less. When it is 95% or less, it is possible to exhibit better strength development while maintaining excellent neutralization resistance.
  • the cement composition of the present embodiment may be prepared by mixing the respective materials at the time of construction, or may be partially or wholly mixed in advance, but at least a non-hydraulic compound and sulfoluminum may be mixed. It is preferable to go through a pulverizing and mixing step of pulverizing and mixing the nate cement at the same time. By going through this step, a uniform surface aesthetic can be ensured after carbonation (salting).
  • the pulverizing and mixing method is not particularly limited. For example, a method using a crusher such as a roller mill, a jet mill, a tube mill, a ball mill, or a vibration mill can be mentioned.
  • each material and water is not particularly limited, and each material may be mixed at the time of construction, or a part or all of them may be mixed in advance. Alternatively, a part of the material may be mixed with water and then the rest of the material may be mixed.
  • any existing device can be used, for example, a tilting mixer, an omni mixer, a Henschel mixer, a V-type mixer, a nauta mixer, and the like can be used.
  • the curing method of the cement composition of the present embodiment is not particularly limited, and outdoor curing, underwater curing, aerial dry curing, steam curing, autoclave curing, forced carbonation (salt) curing, etc. may be adopted. It is possible.
  • the cement composition of the present invention as described above is contained as a cement composition constituting reinforced concrete and applied to a method for suppressing neutralization of reinforced concrete. It is preferable to contain it as a cement composition constituting reinforced concrete and apply it to a method for preserving the surface aesthetics of reinforced concrete.
  • Non-hydraulic compound B 3CaO ⁇ 2SiO 2 .
  • Calcium carbonate of the first grade of the reagent and silicon dioxide of the first grade of the reagent were mixed at a molar ratio of 3: 2, heat-treated at 1,400 ° C. for 2 hours, and left to room temperature to prepare.
  • the brain specific surface area was 3,500 cm 2 / g.
  • Non-hydraulic compound C ⁇ -CaO ⁇ SiO 2 .
  • Calcium carbonate of the first grade of the reagent and silicon dioxide of the first grade of the reagent were mixed at a molar ratio of 1: 1 and heat-treated at 1,500 ° C. for 2 hours, and left to room temperature to prepare.
  • the brain specific surface area was 3,500 cm 2 / g.
  • Non-hydraulic compound D 3CaO, MgO, 2SiO 2 .
  • Reagent 1st grade calcium carbonate, Reagent 1st grade magnesium oxide and Reagent 1st grade silicon dioxide are mixed at a molar ratio of 3: 1: 2, heat treated at 1,400 ° C. for 2 hours, and left to room temperature. did.
  • the brain specific surface area was 3,500 cm 2 / g.
  • Non-hydraulic compound E Non-hydraulic compound A and non-hydraulic compound B were mixed to prepare non-hydraulic compound E containing 50% of each.
  • the brain specific surface area was 3,500 cm 2 / g.
  • Non-hydraulic compound F Non-hydraulic compound E containing 33.4%, 33.3%, and 33.3% of a mixture of non-hydraulic compound A, non-hydraulic compound B, and non-hydraulic compound C, respectively. was produced. The brain specific surface area was 3,500 cm 2 / g.
  • Hydraulic compound G ⁇ -2CaO ⁇ SiO 2 .
  • Reagent 1st grade calcium carbonate and reagent 1st grade silicon dioxide are mixed at a molar ratio of 2: 1, heat treated at 1,400 ° C. for 2 hours, left at room temperature, crushed, and ⁇ -2CaO ⁇ SiO in XRD. The same heat treatment was repeated until the peak of 2 was no longer confirmed. After the peak of only ⁇ -2CaO ⁇ SiO 2 was confirmed, a hydraulic compound E having a brain specific surface area of 3,500 cm 2 / g was prepared.
  • a cement composition was prepared by mixing, and a mortar having a water / powder ratio of 0.5 was prepared according to JIS R 5201 “Physical test method for cement”. Using this mortar, compressive strength, neutralization resistance, and surface aesthetics were investigated. The results are also shown in Table 1. The environmental temperature of the test was 20 ° C.
  • the above-mentioned "powder” refers to a combination of non-hydraulic compounds A to F or hydraulic compounds G and sulfate cement.
  • each material is as follows.
  • -Sulfoluminate cement manufactured by Chungzhou Wangro Cement Industry Co., Ltd., product name "Low alkaline sulfoaluminate cement hardened type 42.5 grade", brain specific surface area 4000 cm 2 / g, SO 3 / Al 2 O 3 Molar ratio 0.6, elimite content 40%
  • the alcohol solution was sprayed and the maximum length of the non-discolored region from the surface to the inside of the specimen was measured using a caliper as the carbon dioxide depth. The smaller the carbonation depth, the higher the neutralization resistance.
  • -Aesthetic After evaluating the neutralization resistance, one surface of 4 cm x 16 cm was rubbed 10 times with a "turtle scrubbing brush", and the powdery material that had peeled off was measured with a measuring instrument. When it was 0.1 g or less, it was rated as “no”, and when it exceeded 0.1 g, it was rated as “yes”.
  • the mass ratio (X / (X + Y)) in Tables 1 to 3 is the non-hydraulic compounds A to F or the non-hydraulic compounds A to F or the non-hydraulic compounds A to F or the non-hydraulic compounds A to F contained in the sulfoluminate cement. It is the mass ratio of the hydraulic compound F, and the unit is%.
  • Example 2 A cement composition and a mortar were prepared in the same manner as in Experimental Example 1 except that the mixing ratio of the sulfoluminate cement and the non-hydraulic compound A was changed so as to have the composition shown in Table 2. Using this mortar, the compressive strength, neutralization resistance, and surface aesthetics were examined in the same manner as in Experimental Example 1. The results are shown in Table 2.
  • the sulfoaluminate cement B was prepared in the same manner as in the preparation of the sulfoluminate cement A except that the composition was such that the elimite content was 15%.
  • Sulfoluminate cement C was prepared in the same manner as in the preparation of sulphoaluminate cement A except that the composition was such that the elimite content was 7%.
  • the cement composition and mortar were prepared in the same manner as in Experimental Example 1 except that the type and composition of the sulfoluminate cement were changed as shown in Table 3. Using this mortar, the compressive strength, neutralization resistance, and surface aesthetics were examined in the same manner as in Experimental Example 1. The results are shown in Table 3.
  • the “X” of the type of sulphoaluminate cement in Table 3 refers to the sulphoaluminate cement used in Experimental Example 1.
  • the present invention can be suitably used as a cement composition particularly used in the fields of civil engineering, construction and the like.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
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Abstract

L'invention concerne une composition de ciment comprenant : un composé non hydraulique ou au moins deux composés non hydrauliques choisis dans le groupe constitué par le γ-2CaO･SiO2, le 3CaO･2SiO2, l'α-CaO･SiO2 et le silicate de calcium et de magnésium ; et du ciment de sulfoaluminate, la teneur du ou des composés non hydrauliques étant de 5 à 40 % en masse.
PCT/JP2021/030074 2020-08-24 2021-08-17 Composition de ciment, son procédé de production, procédé pour l'inhibition de la carbonatation de béton armé ferraillé par addition de ladite composition de ciment et procédé pour le maintien d'un bel aspect de surface de béton armé ferraillé par addition de ladite composition de ciment WO2022044890A1 (fr)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2023063236A1 (fr) * 2021-10-13 2023-04-20 株式会社トクヤマ PROCÉDÉ DE FABRICATION D'OBJET CUIT COMPRENANT UN γ－２ＣＡＯ・ＳＩＯ２
CN116553841A (zh) * 2023-04-18 2023-08-08 河南理工大学 一种碳固化低钙高镁熟料及其制备方法和应用

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WO2003016234A1 (fr) * 2001-08-21 2003-02-27 Denki Kagaku Kogyo Kabushiki Kaisha Adjuvant de ciment, composition de ciment, et procede destine a eliminer la carbonation au moyen de ceux-ci
JP2009537433A (ja) * 2006-05-18 2009-10-29 コミッサリア タ レネルジー アトミーク ホウ素含有水溶液を包埋するためのセメント系組成物、包埋方法及びセメントグラウト組成物
JP2016529200A (ja) * 2013-09-03 2016-09-23 ハイデルベルクセメント・アクチエンゲゼルシャフト スルホアルミン酸カルシウム複合バインダー
WO2018154890A1 (fr) * 2017-02-22 2018-08-30 デンカ株式会社 Agent de durcissement pour béton à durcissement rapide livré prêt-à-l'emploi, matériau de béton à durcissement rapide livré prêt-à-l'emploi, composition de béton à durcissement rapide livré prêt-à-l'emploi, et son procédé de préparation
JP2019058091A (ja) * 2017-09-26 2019-04-18 デンカ株式会社 防草材及びそれの使用方法
JP2020152610A (ja) * 2019-03-20 2020-09-24 デンカ株式会社 膨張混和材、セメント組成物、及び、コンクリート

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WO2023063236A1 (fr) * 2021-10-13 2023-04-20 株式会社トクヤマ PROCÉDÉ DE FABRICATION D'OBJET CUIT COMPRENANT UN γ－２ＣＡＯ・ＳＩＯ２
CN116553841A (zh) * 2023-04-18 2023-08-08 河南理工大学 一种碳固化低钙高镁熟料及其制备方法和应用
CN116553841B (zh) * 2023-04-18 2024-05-07 河南理工大学 一种碳固化低钙高镁熟料及其制备方法和应用

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