WO2014073634A1 - Mélange de pouzzolane - Google Patents

Mélange de pouzzolane Download PDF

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WO2014073634A1
WO2014073634A1 PCT/JP2013/080225 JP2013080225W WO2014073634A1 WO 2014073634 A1 WO2014073634 A1 WO 2014073634A1 JP 2013080225 W JP2013080225 W JP 2013080225W WO 2014073634 A1 WO2014073634 A1 WO 2014073634A1
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sio
cao
point
raw material
pozzolanic
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PCT/JP2013/080225
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Japanese (ja)
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前田　博人
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株式会社柏木興産
九州電力株式会社
前田建設工業株式会社
株式会社麻生
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Priority to JP2014545764A priority Critical patent/JP5873568B2/ja
Publication of WO2014073634A1 publication Critical patent/WO2014073634A1/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
    • 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
    • C04B18/12—Waste materials; Refuse from quarries, mining or the like
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
    • C04B2103/0088—Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes
    • 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 pozzolanic admixture that has pozzolanic reactivity and is mixed with a cement material such as concrete or mortar to improve the properties of the material.
  • Pozzolans themselves have very little hydraulic properties, but they are fine powders that have the property of reacting with calcium hydroxide in the presence of water at room temperature to form insoluble compounds and cure (pozzolane reactivity). It is a substance, and its pozzolanic reactivity has been used to improve it by mixing it with cement materials such as concrete and mortar.
  • pozzolanic admixtures Conventionally used as such pozzolanic admixtures are natural pozzolans derived from shirasu, white clay, volcanic ash and the like, and artificial pozzolans such as fly ash, blast furnace slag, silica fume and the like.
  • the pozzolanic admixture is required to be baked at a high temperature exceeding 1000 ° C., such as heating by a volcano or combustion heat from a thermal power plant, whether natural pozzolans or artificial pozzolans.
  • Patent Document 1 proposes to use an incinerated ash powder obtained by incinerating sewage sludge as a pozzolanic admixture.
  • Patent Document 2 discloses that an artificial pozzolan is obtained from ash generated from incineration of municipal waste, and is particularly suitable when oxidizing aluminum metal to alumina. Is fired at a temperature of 900 to 1000 ° C.
  • Patent Document 3 proposes a pozzolanic admixture obtained by adding inorganic salt or antioxidant to fly ash and silica fume, and this fly ash is subjected to a high-temperature combustion process at 1400 ° C. What collect
  • Patent Document 4 discloses a pozzolanic admixture derived from fumes (blast furnace fumes) discharged from a blast furnace having a furnace top temperature of about 1300 ° C.
  • a substance containing silica or silica and alumina which is used as a pozzolan, or pozzolanic depending on each substance. Only special measures were taken individually to make it useful as an admixture.
  • the pozzolanic admixture whether natural pozzolans or artificial pozzolans, can be obtained by firing at a temperature of about 1000 ° C. or higher, usually at a high temperature of about 1500 ° C. In the case of manufacturing, there is a problem that it is not easily obtained because an additional large-scale firing equipment investment is required, and is currently unsuitable for practical use in terms of cost.
  • An object of the present invention is to provide a new technique capable of universally obtaining pozzolanic admixtures from various raw materials at lower temperature conditions than before.
  • the present inventor mixed raw materials containing coal gangue and mixed raw materials so that the composition of pozzolanic admixture was SiO 2 , Al 2 O 3 , CaO and SO 3.
  • excellent pozzolanic admixtures can be obtained in common from various raw materials by firing raw materials containing SiO 2 , Al 2 O 3 and CaO at a specific temperature.
  • the present invention is formed from a raw material containing coal gangue, the raw material containing at least SiO 2 , Al 2 O 3 , CaO and SO 3 , and SiO 2 , Al 2 O 3 and CaO are shown in FIG. 1A.
  • O 3 0.10; CaO 0.25), point L (SiO 2 0.40; Al 2 O 3 0.10; CaO 0.50), and point M (SiO 2 0.40; Al 2 O 3 0 .30; CaO 0.30) are successively bounded by a straight line and have a composition ratio within a range surrounded by a specific surface area of 8000 cm 2 / g or more, and the composition ratio of SO 3 by weight is SiO 2 + Al 2 1/3 to 1/20 of the total amount of O 3 + CaO A run admixture is provided.
  • the SiO 2 , Al 2 O 3 and CaO contained in the raw material are the above-mentioned points J, K, and K on the SiO 2 —Al 2 O 3 —CaO system triangular coordinates.
  • the point A SiO 2 0.60; Al 2 O 3 0.30; CaO 0.10
  • the point B shown in FIG.
  • SiO 2 , Al 2 O 3, and CaO contained in the raw material are the above-mentioned points J and K on the SiO 2 —Al 2 O 3 —CaO system triangular coordinates.
  • Point B ′ (SiO 2 0.65; Al 2 O 3 0.10; CaO 0.25), point C ′ (SiO 2 0.50; Al 2 O 3 0.10; CaO 0.40), and
  • the present invention provides a pozzolanic admixture having a composition ratio within a range surrounded by connecting points D ′ (SiO 2 0.50; Al 2 O 3 0.25; CaO 0.25) sequentially in a straight line.
  • a pozzolanic admixture can be obtained from a wide variety of raw materials under a lower temperature condition than before.
  • the pozzolanic admixture of the present invention is expected to have effects such as drying shrinkage resistance, salt damage resistance, acid resistance, etc., in addition to increasing the strength of the material when mixed with a cement material such as concrete or mortar.
  • Triangular coordinates for indicating a suitable composition range of SiO 2 , Al 2 O 3 and CaO regarding the raw material of the pozzolanic admixture of the present invention when a part of the raw material coal gangue is replaced with another material (for example, shale) Indicates.
  • Triangles for indicating a suitable composition range of SiO 2 , Al 2 O 3 and CaO for the raw material of the pozzolanic admixture of the present invention when a part of the raw material coal gangue is not replaced with another material (for example, shale) Indicates coordinates.
  • the raw material composition when a part of the raw material coal gangue is replaced with shale is plotted on the triangular coordinates of SiO 2 , Al 2 O 3 and CaO (Example) 1).
  • the raw material composition when implemented without replacing part of the raw material coal gangue with other materials is plotted on the triangular coordinates of SiO 2 , Al 2 O 3 and CaO. (Example 2).
  • the flowchart for manufacturing the pozzolanic admixture of this invention is illustrated. (Example 1) which shows the XRD data in 1 sample of the pozzolanic admixture of this invention.
  • Example 1 The data which computed the particle diameter distribution and specific surface area in 1 sample of the pozzolanic admixture of this invention are shown (Example 1).
  • Example 2 which shows the XRD data in 1 sample of the pozzolanic admixture of this invention.
  • the data of the drying shrinkage test in one sample of the pozzolanic admixture of the present invention are shown (Example 2).
  • the pozzolanic admixture of the present invention is formed from a raw material containing coal gangue, exhibits an amorphous state, and contains at least SiO 2 , Al 2 O 3 , CaO and SO 3 as constituent components.
  • Coal gangue is a kind of industrial waste, also called “bota”, and is mainly discharged during the process of refining coal.
  • Coal gangue is currently considered as a causative substance causing serious environmental pollution by various forms including air pollution.
  • a pozzolanic admixture having an excellent mortar activity is obtained, but also there is an aspect of contributing to the solution of environmental pollution problems.
  • the composition of the coal gangue to be used in the present invention varies depending on the production area of the coal used as a raw material.
  • As the coal gangue used in the present invention 50 to 85% by weight of SiO 2 , and 10 to It is preferable to use a material containing 30% by weight of Al 2 O 3 and containing a small amount of coal components.
  • Coal gangue is an essential component of the raw material in the present invention. Generally, it should have 20% by weight or more in the raw material mixture, but a part of the component is composed of SiO 2 and Al 2 O 3. It can be replaced with other similar materials. Such other preferred raw materials include, but are not limited to, shale. However, when the coal gangue in the raw material is replaced with another raw material (for example, shale), the ratio of the other raw material / coal gangue is within the range of 1/4 to 3/4 by weight ratio in the raw material. It is preferable that
  • the raw material of the pozzolanic admixture according to the present invention can be prepared so as to have a desired mixing ratio of SiO 2 and Al 2 O 3. it can.
  • a coal gangue having a sufficiently high SiO 2 content for example, 70% by weight or more
  • the above-mentioned containing 60 wt% or more of SiO 2 so as to supplement the SiO 2 component. It is possible to prepare raw materials such as blending other raw materials (for example, shale).
  • the fact that the pozzolanic admixture of the present invention is amorphous means that the cement material such as concrete or mortar obtained by mixing the pozzolanic admixture exhibits an amorphous state.
  • XRD data of the cement material See the examples below).
  • One of the characteristics of the pozzolanic admixture of the present invention is formed from a raw material containing coal gangue and contains at least SiO 2 , Al 2 O 3 , CaO and SO 3 , and SiO 2 , Al 2 O 3 and CaO are contained.
  • 1A and has a composition ratio within a range surrounded by connecting points J, K, L, and M on the triangular coordinates of the SiO 2 —Al 2 O 3 —CaO system in FIG. Is a 8000 cm 2 / g or more, and the composition ratio of SO 3 is 1/6 to 1/20 of the total amount of SiO 2 + Al 2 O 3 + CaO by weight. It is to provide.
  • the points J to M represent the following respective weight fractions as shown in FIG. 1A.
  • Point J (SiO 2 0.65; Al 2 O 3 0.30; CaO 0.05)
  • Point K (SiO 2 0.65; Al 2 O 3 0.10; CaO 0.25)
  • Point L (SiO 2 0.40; Al 2 O 3 0.10; CaO 0.50)
  • Point M (SiO 2 0.40; Al 2 O 3 0.30; CaO 0.30)
  • one of the characteristics of the pozzolanic admixture of the present invention is that, particularly when a part of the raw material coal gangue is replaced with another material (for example, shale), SiO 2 , Al 2 O 3 in the raw material and A composition in which the composition ratio of CaO is within a range surrounded by connecting the above point J, point K, point L, and point M on the SiO 2 —Al 2 O 3 —CaO system triangular coordinate shown in FIG.
  • FIG. 1B a pozzolanic admixture having a composition ratio within a range surrounded by connecting points A, B, C, and D sequentially with straight lines is provided.
  • points A to D represent the following respective weight fractions as shown in FIG. 1B.
  • Point A (SiO 2 0.60; Al 2 O 3 0.30; CaO 0.10)
  • Point B (SiO 2 0.60; Al 2 O 3 0.10; CaO 0.30)
  • Point C (SiO 2 0.40; Al 2 O 3 0.10; CaO 0.50)
  • Point D (SiO 2 0.40; Al 2 O 3 0.30; CaO 0.30)
  • the pozzolanic admixture according to the present invention is more preferably SiO 2 , Al 2 O 3.
  • CaO have a composition ratio within a range surrounded by connecting points E, F, G, and H on the SiO 2 —Al 2 O 3 —CaO system triangular coordinate shown in FIG. It is.
  • points E to H represent the following respective weight fractions, as shown in FIG. 1B.
  • Point E (SiO 2 0.55; Al 2 O 3 0.25; CaO 0.20)
  • Point F (SiO 2 0.55; Al 2 O 3 0.15; CaO 0.30)
  • Point G (SiO 2 0.45; Al 2 O 3 0.15; CaO 0.40)
  • Point H (SiO 2 0.45; Al 2 O 3 0.25; CaO 0.30)
  • one of the characteristics of the pozzolanic admixture of the present invention is that the composition ratio of SiO 2 , Al 2 O 3 and CaO in the raw material is particularly when a part of the raw material coal gangue is not replaced with another material.
  • FIG. 1C a pozzolanic admixture having a composition ratio within a range surrounded by connecting points A ′, B ′, C ′, and D ′ sequentially with straight lines is provided.
  • the points A ′ to D ′ represent the following respective weight fractions.
  • Point A ′ (SiO 2 0.65; Al 2 O 3 0.25; CaO 0.10)
  • Point B ′ (SiO 2 0.65; Al 2 O 3 0.10; CaO 0.25)
  • Point C ′ (SiO 2 0.50; Al 2 O 3 0.10; CaO 0.40)
  • Point D ′ (SiO 2 0.50; Al 2 O 3 0.25; CaO 0.25)
  • the pozzolanic admixture according to the present invention contains SiO 2 , Al 2 O 3 and CaO are surrounded by connecting points E ′, F ′, G ′, and H ′ on the SiO 2 —Al 2 O 3 —CaO system triangular coordinate shown in FIG. It has a composition ratio within the range.
  • the points E ′ to H ′ represent the following respective weight fractions as shown in FIG. 1C.
  • Point E ′ (SiO 2 0.65; Al 2 O 3 0.20; CaO 0.15)
  • Point F ′ (SiO 2 0.65; Al 2 O 3 0.15; CaO 0.20)
  • Point G ′ (SiO 2 0.50; Al 2 O 3 0.15; CaO 0.35)
  • Point H ′ (SiO 2 0.50; Al 2 O 3 0.20; CaO 0.30)
  • the pozzolanic admixture of the present invention can be prepared from various raw materials including the above-described coal gangue [a part of which may be replaced by another material (for example, shale)].
  • One or more of those containing 30% by weight or more of SiO 2 and 10% by weight or more of Al 2 O 3 can be used as the main raw material. If the CaO component and SO 3 component are not sufficiently contained in the main raw material, those containing these components are used as the raw material.
  • Examples of the raw material containing calcium described above include calcium carbonate.
  • Examples of materials used as the raw material of the pozzolanic admixture of the present invention together with the above main raw materials include raw materials containing SO 3 and various raw materials known as various artificial ashes.
  • the SO 3 component is supplied mainly by using gypsum.
  • gypsum is a mineral mainly composed of calcium sulfate hydrates and anhydrides.
  • examples of materials used as the raw material for the pozzolanic admixture of the present invention together with the above main raw materials include desulfurized gypsum (GPS), fly ash (FA), and blast furnace slag (BFS). Can be mentioned.
  • coal gangue / shale / calcium carbonate / fly ash / blast furnace slag / desulfurized gypsum and coal gangue / calcium carbonate / fly ash / Examples include, but are not limited to, blast furnace slag / desulfurized gypsum.
  • the second important feature of the present invention is that a raw material (main raw material) containing 30% by weight or more of SiO 2 containing coal gangue and 10% by weight or more of Al 2 O 3 is calcined at a temperature of 650 to 850 ° C.
  • a raw material main raw material
  • SiO 2 containing coal gangue and 10% by weight or more of Al 2 O 3 is calcined at a temperature of 650 to 850 ° C.
  • the firing temperature varies depending on the type of main raw material used, the dehydration of kaolinite at a lower temperature than ordinary clay and kaolin soil due to the combustion of coal components contained in the main raw material coal gangue. It is thought that can occur. For this reason, it is not necessary to heat the firing temperature to a high temperature of 1000 ° C., but rather the performance as a pozzolanic admixture is deteriorated. The inventor has confirmed that this is the case. On the other hand, it has also been confirmed that the dehydration of kaolinite is not sufficiently obtained at a low temperature of about 500 ° C., and a firing temperature of 650 ° C. is necessary at the lowest (see Comparative Example 3 described later).
  • the pozzolanic admixture of the present invention has a specific surface area of 8000 cm 2 / g or more, preferably 9000 cm 2 / g or more, more preferably 10,000 cm, in order to exhibit a sufficient pozzolanic action effect when mixed with a cement material. It should be a fine powder with a very high specific surface area of 2 / g or more.
  • the pozzolanic admixture of the present invention can be obtained by firing one or more main raw materials containing coal gangue as described above and then mixing them with other raw materials containing at least SO 3 . At this time, after the mixing, the entire mixture is preferably subjected to a pulverization treatment to increase its surface area (specific surface area).
  • a pulverization treatment to increase its surface area (specific surface area).
  • the pulverization process is carried out by a pulverization process not containing moisture, so-called dry pulverization. Therefore, the so-called wet pulverization that includes moisture is not performed. This treatment improves the performance as a pozzolanic admixture.
  • FIG. 2 as illustrated in Example 1 below, a raw material comprising a combination of coal gangue / shale / calcium carbonate / FA (fly ash) / slag (blast furnace slag) / anhydrous gypsum (desulfurized gypsum) is used.
  • a flow chart is shown for preparing the pozzolanic admixture of the present invention by calcining coal gangue, shale, and calcium carbonate at 750 ° C.
  • the flowchart at the time of excluding the shale described in the said FIG. 2 from a raw material is applied.
  • Example 1 is an example in which part of the coal gangue was replaced with shale, which is another material.
  • Example 2 is an example in which part of the coal gangue was not replaced with another material.
  • Example 1 Composition of raw material and pozzolanic admixture
  • Samples of the pozzolanic admixture having the SiO 2 / Al 2 O 3 / CaO composition ratio shown in Table 2 below were prepared using the raw materials having the compositions shown in Table 1 below.
  • the sample also contains other components derived from raw materials.
  • the total composition (% by weight) of Sample I is SiO 2 (38.66), Al 2 O 3 (15.10), CaO (23.03), Fe 2 O 3 (3.616), MgO (3.387), SO 3 (11.67) , Na 2 O (0), K 2 O (0.803), TiO 2 (0.974), Cl (0), and the composition ratio of SO 3 (11.67) is the total amount of SiO 2 + Al 2 O 3 + CaO by weight. It was 1 / (6.6) with respect to (76.79), and it was confirmed that it was included in the range of 1/6 to 1/20.
  • the overall composition of Sample II is SiO 2 (40.52), Al 2 O 3 (19.23), CaO (22.36), Fe 2 O 3 (3.832), MgO (4.571), SO 3 (4.89), Na 2 O. (0), K 2 O (0.811), TiO 2 (0.986), Cl (0), and the composition ratio of SO 3 (4.89) is equal to the total amount of SiO 2 + Al 2 O 3 + CaO (82.11) by weight. On the other hand, it was 1 / (16.8), and it was confirmed that it was included in the range of 1/6 to 1/20. Thus, both Sample I and Sample II contained SiO 2 30% by weight or more and Al 2 O 3 10% by weight or more.
  • XRD data XRD data for the pozzolanic admixture according to the present invention was obtained from each sample listed in Table 2 above. This XRD data was obtained by X-ray diffraction measurement using CuK ⁇ rays, and was performed according to the following conditions. -X-ray output: 40 kV, 20 mA Scan speed / counting time: 4.0000 deg. / Min. Goniometer: Ultimate IV (ADS) ⁇ Detector: D / teX Ultra Filter: K ⁇ filter Step width: 0.0200 deg. Scan axis: 2 Theta / Theta Scan range: 4.0000-64.0000 deg. ⁇ Scan mode: CONTINUOUS ⁇ CBO selection slit: BB -Incident slit: 1/2 ° ⁇ Long limit slit: 10mm ⁇ Reception slit 1: Open ⁇ Reception slit 2: Open
  • FIG. 3 shows the measurement results for the sample I described in Table 2 above.
  • no sharp diffraction peak of kaolinite was observed by observing XRD data, and a broad peak indicated by region X in the figure was observed. Therefore, the pozzolanic admixture obtained above was found to be amorphous.
  • the point a in the figure is the main peak of metakaolin, it was confirmed that the pozzolanic admixture obtained above contains metakaolin.
  • the SiO 2 / Al 2 O 3 / CaO composition ratio of Samples I to VI is shown in the triangular coordinates of FIG. 1D.
  • Strength characteristics of pozzolanic admixtures Samples of pozzolanic admixtures prepared with 40 mm x 40 mm x 160 mm prisms using normal Portland cement and cement association standard sand were used to compare the compressive strength values with those of standard mortar. evaluated. The composition was as shown in Table 3, and a standard mortar and a test mortar were produced. The numerical value in a table
  • the kneading was performed using a Hobart mixer defined in JIS R 5201, and the specimen molding die and the filling machine were also those defined in JIS R 5201.
  • Coal gangue, shale, and calcium carbonate were calcined at 750 ° C., and fly ash, blast furnace slag powder, and desulfurized gypsum powder were mixed into 6 components as raw powder.
  • Table 4 shows the activity index measured for the mixture of 6 components and then pulverized to the specific surface area in each table.
  • the specific surface area in Table 4 above was measured using a laser diffraction / scattering particle size distribution analyzer (HORIBA LA-300, manufactured by Horiba, Ltd.).
  • HORIBA LA-300 manufactured by Horiba, Ltd.
  • the measurement result of the particle size distribution for one sample in the case of 6-component pulverization described in Table 4 above is shown in FIG.
  • a specific surface area of 11338 cm 2 / g were calculated by the measurement apparatus. From this, it was confirmed that the specific surface area of the pozzolanic admixture according to the present invention is 8000 cm 2 / g or more.
  • the activity index is clearly increased as compared with the reference mortar to increase the compressive strength of the mortar.
  • the six components constituting the pozzolanic admixture are mixed and then pulverized to increase the specific surface area to 8000 cm 2 / g or more, the function of increasing the strength is further enhanced.
  • the activity index of the sample I having the composition of sample I prepared in the same manner as described above and fired at 850 ° C. was measured. 112 and 105, and it was recognized that there was an effect of increasing the compressive strength.
  • point H (SiO 2 0.45; Al 2 O 3 0.25; CaO 0.30) were sequentially connected by a straight line and had a composition ratio within a range surrounded. That is, the pozzolanic admixture according to the present invention has a SiO 2 / Al 2 O 3 / CaO composition ratio within a range surrounded by connecting points J, K, L, and M in FIG.
  • the points A, B, C, and D are sequentially set.
  • the pozzolanic admixture according to the present invention has a composition ratio of SiO 2 / Al 2 O 3 / CaO in FIG. 1B above, particularly when a part of the raw material coal gangue is replaced with another material (for example, shale).
  • Comparative Example 1 As Comparative Example 1, a sample of a pozzolanic admixture having a SiO 2 / Al 2 O 3 / CaO composition ratio shown in Table 6 below was prepared using the raw materials having the compositions shown in Table 1 above.
  • Comparative Example 2 As Comparative Example 2, a pozzolanic admixture composed of only one component each of fly ash (FA) and blast furnace slag (BFS) was obtained.
  • three components of coal gangue, shale, and calcium carbonate were fired at 750 ° C., and a pozzolanic admixture composed only of the three components was obtained without mixing other components.
  • the pozzolanic admixture of the present invention is simply obtained by burning only three components of coal gangue, shale, and calcium carbonate and mixing only the three components without mixing other components.
  • a pozzolanic admixture composed of only one component each of fly ash (FA) and blast furnace slag (BFS) the pozzolanic admixture consists only of firing these three components. It was found that further compressive strength could not be obtained than the material.
  • Comparative Example 3 As Comparative Example 3, the difference in the activity of the initial age (initial age) depending on the firing temperature was confirmed.
  • the composition of sample I described above was prepared in the same manner as above, and the pozzolanic mixture obtained by firing at temperatures other than the temperature range of 650 to 850 ° C. (550 ° C., 600 ° C., 900 ° C., 1000 ° C.)
  • the activity index of the material was measured, the results shown in Table 9 below were obtained. From this result, it was found that the pozzolanic admixture according to the present invention could not obtain sufficient compressive strength when formed by heating the main raw material at a temperature other than 650 to 850 ° C.
  • Example 2 Composition of raw material and pozzolanic admixture
  • the raw material having the composition shown in the following Table 10 was used, and the pozzolanic composition having the SiO 2 / Al 2 O 3 / CaO composition ratio shown in the following Table 11
  • Admixture samples (1) to (7) were prepared.
  • FIG. 1E shows the result of plotting the samples (1) to (7) on the SiO 2 —Al 2 O 3 —CaO system triangular coordinates.
  • XRD data of the pozzolanic admixture according to the present invention was obtained from each sample shown in Table 10 by X-ray diffraction measurement using CuK ⁇ rays according to the same procedure as in Example 1.
  • XRD data a measurement result for the sample (2) described in Table 11 is shown in FIG.
  • the Y point in the figure is the main peak of metakaolin, it was confirmed that the pozzolanic admixture obtained above contained metakaolin.
  • the pozzolanic admixture according to the present invention has a SiO 2 / Al 2 O 3 / CaO composition ratio within a range surrounded by connecting points J, K, L, and M in FIG.
  • the points A ′, B ′, C ′, and D ′ are sequentially set.
  • the point E ′ SiO 2 0.65; Al 2 O 3 0.20; CaO 0.

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Abstract

La présente invention concerne une technique qui permet d'obtenir un mélange de pouzzolane de façon universelle à partir de matières premières diverses. Le mélange de pouzzolane est formé à partir de matière première contenant de la gangue de charbon. La matière première contient au moins SiO2, Al2O3, CaO et SO3. Les SiO2, Al2O3 et CaO forment une composition dans une zone délimitée par les points de connexion J, K, L et M sur les coordonnées triangulaires indiquées sur la figure 1A, et le rapport de composition de SO3, en termes de poids, est de 1/6 à 1/20 du poids total de SiO2 + Al2O3 + CaO. Après frittage, le mélange de pouzzolane prend une forme amorphe, dans laquelle la surface spécifique est d'au moins 8000 cm2/g.
PCT/JP2013/080225 2012-11-08 2013-11-08 Mélange de pouzzolane WO2014073634A1 (fr)

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WO2016159423A1 (fr) * 2015-03-31 2016-10-06 주식회사 모닝스타 Composition d'additif pour aliment pour bétail contenant de la pouzzolane, et utilisation de cette composition
JP2018002563A (ja) * 2016-07-05 2018-01-11 鹿児島県 水硬性石灰及びその製造方法
JP2018043905A (ja) * 2016-09-14 2018-03-22 住友大阪セメント株式会社 セメント混合用シリカ質焼成物及びその製造方法、セメント組成物及びその製造方法
CN108479744A (zh) * 2018-04-28 2018-09-04 孙燕霞 一种脱硫催化剂的制备方法及其应用
CN108821687A (zh) * 2018-07-16 2018-11-16 长江水利委员会长江科学院 用高密度尾矿作骨料的水工抗冲耐磨混凝土及其制备方法
CN109824311A (zh) * 2019-03-18 2019-05-31 荆门市意祥机械有限公司 一种煤矸石再生护坡砖及其制备方法
CN109824304A (zh) * 2019-03-18 2019-05-31 荆门市意祥机械有限公司 一种煤矸石再生护坡砖及其制备方法
CN109956737A (zh) * 2019-05-15 2019-07-02 中南大学 一种采用带式焙烧机球团法制备活性混合材的方法
JP2019173059A (ja) * 2018-03-27 2019-10-10 日本製鉄株式会社 高炉用非焼成塊成鉱の製造方法及びポゾラン反応性鉄含有原料の製造方法
JP2021008375A (ja) * 2019-07-01 2021-01-28 宇部興産株式会社 モルタル・コンクリート用混和材、水硬性組成物、セメント組成物及びコンクリート
CN113233842A (zh) * 2021-06-08 2021-08-10 辽宁工程技术大学 一种煤矸石保温混凝土的制备方法
CN113402246A (zh) * 2021-07-30 2021-09-17 舒新前 一种高浓度浆体材料及其制备方法和应用
JP2021147307A (ja) * 2020-03-13 2021-09-27 宇部興産株式会社 モルタル・コンクリート用混和材料、水硬性組成物、セメント組成物及びコンクリート
JP2021147308A (ja) * 2020-03-13 2021-09-27 宇部興産株式会社 モルタル・コンクリート用混和材料、水硬性組成物、セメント組成物及びコンクリート
JPWO2021260860A1 (fr) * 2020-06-24 2021-12-30
JPWO2021260859A1 (fr) * 2020-06-24 2021-12-30
CN115159957A (zh) * 2021-04-01 2022-10-11 国家能源投资集团有限责任公司 用于生产煤基固废物多孔陶瓷的组合物、煤基固废物多孔陶瓷及其制备方法和应用
JP7503680B1 (ja) 2023-03-24 2024-06-20 デンカ株式会社 混和材及びセメント組成物

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WO2016159423A1 (fr) * 2015-03-31 2016-10-06 주식회사 모닝스타 Composition d'additif pour aliment pour bétail contenant de la pouzzolane, et utilisation de cette composition
JP2018002563A (ja) * 2016-07-05 2018-01-11 鹿児島県 水硬性石灰及びその製造方法
JP2018043905A (ja) * 2016-09-14 2018-03-22 住友大阪セメント株式会社 セメント混合用シリカ質焼成物及びその製造方法、セメント組成物及びその製造方法
JP2019173059A (ja) * 2018-03-27 2019-10-10 日本製鉄株式会社 高炉用非焼成塊成鉱の製造方法及びポゾラン反応性鉄含有原料の製造方法
JP6992644B2 (ja) 2018-03-27 2022-01-13 日本製鉄株式会社 高炉用非焼成塊成鉱の製造方法及びポゾラン反応性鉄含有原料の製造方法
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CN108821687A (zh) * 2018-07-16 2018-11-16 长江水利委员会长江科学院 用高密度尾矿作骨料的水工抗冲耐磨混凝土及其制备方法
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CN109956737A (zh) * 2019-05-15 2019-07-02 中南大学 一种采用带式焙烧机球团法制备活性混合材的方法
JP2021008375A (ja) * 2019-07-01 2021-01-28 宇部興産株式会社 モルタル・コンクリート用混和材、水硬性組成物、セメント組成物及びコンクリート
JP2021147308A (ja) * 2020-03-13 2021-09-27 宇部興産株式会社 モルタル・コンクリート用混和材料、水硬性組成物、セメント組成物及びコンクリート
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WO2021260859A1 (fr) * 2020-06-24 2021-12-30 一般財団法人先端建設技術センター Procédé de fabrication d'inhibiteur d'expansion
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CN113233842A (zh) * 2021-06-08 2021-08-10 辽宁工程技术大学 一种煤矸石保温混凝土的制备方法
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