WO2022230605A1 - Matériau liquide, composition de mortier liquide, et corps durci - Google Patents

Matériau liquide, composition de mortier liquide, et corps durci Download PDF

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Publication number
WO2022230605A1
WO2022230605A1 PCT/JP2022/016666 JP2022016666W WO2022230605A1 WO 2022230605 A1 WO2022230605 A1 WO 2022230605A1 JP 2022016666 W JP2022016666 W JP 2022016666W WO 2022230605 A1 WO2022230605 A1 WO 2022230605A1
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Prior art keywords
mass
parts
less
grout
cement
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PCT/JP2022/016666
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English (en)
Japanese (ja)
Inventor
崇 佐々木
聡史 高木
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デンカ株式会社
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Priority to CN202280030079.5A priority Critical patent/CN117177952A/zh
Publication of WO2022230605A1 publication Critical patent/WO2022230605A1/fr

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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
    • 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
    • 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
    • C04B22/02—Elements
    • C04B22/04—Metals, e.g. aluminium used as blowing agent
    • 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
    • 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
    • C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
    • 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
    • C04B24/16—Sulfur-containing compounds
    • C04B24/20—Sulfonated aromatic compounds
    • C04B24/22—Condensation or polymerisation products 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete

Definitions

  • the present invention relates to a grout material, a grout mortar composition, and a hardened body using the grout mortar composition used in the civil engineering and construction industries.
  • Grouting materials are used to improve the workability and filling properties of mortar and concrete, and to facilitate grouting work.
  • the main uses are construction of underground structures, installation of bridge bearings, installation of various machinery, filling of gaps in walls and columns in seismic reinforcement, etc. To fill gaps in structures and integrate them. , (1) Fluidity required according to filling location and filling method, etc., (2) No shrinkage to prevent bleeding, settlement and voids after filling, (3) Various strengths required according to the usage conditions of the structure. etc. (see, for example, Non-Patent Document 1).
  • the expansive material used includes, for example, 3CaO.3Al 2 O 3 .CaSO 4 (auin), CaSO
  • the expansive material used includes, for example, 3CaO.3Al 2 O 3 .CaSO 4 (auin), CaSO
  • auin-based expansive agent mainly composed of 4 and CaO
  • lime-based (lime-based expansive agent) mainly composed of free lime, it contains free lime-hydraulic substance-gypsum. Inflatable materials, etc.
  • an object of the present invention is to provide a grout material, a grout mortar composition, and a hardened body that have high fluidity and can further enhance the self-healing effect.
  • the present invention has been made to solve the above problems. , the fluidity is high, the self-healing effect can be further enhanced, and the durability can be improved, leading to the completion of the present invention.
  • the gist of the present invention is as follows. [1] A grout material comprising cement, an expanding agent, a gas foaming substance, a water reducing agent, and fine aggregate, wherein the expanding agent contains ternesite. [2] The grout material according to [1] above , wherein the amount of SO3 is 0.5% by mass or more and 10.0% by mass or less, and the amount of MgO is 0.1% by mass or more and 3.0% by mass or less.
  • the rapid hardening material contains calcium aluminate, the calcium aluminate has a CaO/Al 2 O 3 molar ratio of 1.2 or more and 3.0 or less, and the calcium
  • the content of aluminate is 2 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the cement.
  • a grout material a grout mortar composition, and a hardened body that have high fluidity and can further enhance the self-healing effect.
  • grout mortar referred to in this specification is a general term for pastes without coarse aggregates and mortars containing fine aggregates.
  • the grout material of the present invention contains cement, an expanding material, a gas foaming substance, a water reducing agent, and a fine aggregate , and contains SO3 in an amount of 0.5% by mass or more and 10.0% by mass or less, MgO is preferably 0.1% by mass or more and 3.0% by mass or less. Focusing attention on the amount of SO 3 and MgO contained in the grout material of the present invention, it was found that the amount of SO 3 and MgO affects the fluidity and self-healing effect of the grout material. That is, when the amount of SO 3 contained in the grout material is less than 0.5% by mass and the amount of MgO is less than 0.1% by mass, the fluidity is lowered and the self-healing effect is lowered.
  • the amount of SO3 contained in the grout material is preferably 0.5% by mass or more , more preferably 0.7% by mass or more, from the viewpoint of increasing fluidity and improving the self-healing effect. It is more preferably 0.8% by mass or more.
  • the amount of SO3 contained in the grout material is required to be 10.0% by mass or less, but is preferably 8.0% by mass or less, and 6.0% by mass or less. is more preferable.
  • the amount of MgO contained in the grout material is preferably 0.1% by mass or more, more preferably 0.15% by mass or more, from the viewpoint of increasing fluidity and improving the self-healing effect. 0.2% by mass or more is more preferable.
  • the amount of MgO contained in the grout material is preferably 3.0% by mass or less, more preferably 2.0% by mass or less, and 1.0% by mass or less. is more preferred.
  • the amount of SO 3 and MgO contained in the grout material can be adjusted, for example, by adding an admixture containing SO 3 and MgO when producing the grout material. Also, the amounts of SO 3 and MgO can be measured by X-ray fluorescence diffraction (XRF).
  • XRF X-ray fluorescence diffraction
  • the cement used in the present invention is not particularly limited, and includes various cements such as ordinary, early-strength, ultra-early-strength, low-heat and moderate-heat cements, and blast-furnace slag, fly ash, silica fume, etc. mixed with these cements.
  • various cements such as ordinary, early-strength, ultra-early-strength, low-heat and moderate-heat cements, and blast-furnace slag, fly ash, silica fume, etc. mixed with these cements.
  • mixed cement eco-cement
  • eco-cement manufactured from municipal waste incineration ash and sewage sludge incineration ash
  • commercially available fine-particle cement e.gypsum, etc.
  • those adjusted by increasing or decreasing the amount of components for example, gypsum, etc.
  • the cement used in the present invention preferably has a Blaine specific surface area value of 2,500 cm 2 /g or more and 7,000 cm 2 /g or less, and 2,750 cm 2 from the viewpoint of production cost and strength development. /g or more and 6,000 cm 2 /g or less, and more preferably 3,000 cm 2 /g or more and 4,500 cm 2 /g or less.
  • the Blaine specific surface area value is determined according to JIS R 5201 (physical test method for cement).
  • the expansive material used in the present invention is not particularly limited, and any material can be used as long as it produces an expansive hydrate and suppresses bleeding.
  • those containing free lime, free magnesia, calcium ferrite, ettringite, lime, and ettringite-lime composite are known and not particularly limited, but from the viewpoint of long-term stability, those containing free lime are known. is preferred.
  • Those containing free lime include, for example, free lime-anhydrous gypsum system, free lime-hydraulic compound system, and free lime-hydraulic compound-anhydrous gypsum system.
  • the expansive material used in the present invention preferably contains ternesite.
  • Ternesite is a mineral represented by 5CaO.2SiO2.SO3 and promotes hydraulic reaction.
  • ternesite since ternesite itself hardly reacts, it is presumed that it plays a role like a filler and improves fluid retention. Therefore, even at high temperatures, the effect of maintaining fluidity can be maintained.
  • the content of ternesite is preferably 0.05 parts by mass or more and 20 parts by mass or less, more preferably 0.1 parts by mass or more and 18 parts by mass or less, relative to 100 parts by mass of the expanding material. 0.5 parts by mass or more and 15 parts by mass or less is more preferable. When the content of ternesite is within the above range, both acceleration of curing and retention of fluidity can be improved.
  • the hydraulic compound includes, for example, one or more of Auin, calcium ferrite, calcium aluminoferrite, calcium silicate, calcium aluminate, and the like.
  • a commercially available expanding material or a static crushing material can be used as the expanding material. Expansive materials and static crushing materials are commercially available from various companies. Pan", “N-EX”, “Bryster” and pulverized products thereof.
  • the particle size of the expansive material used in the present invention is not particularly limited, but the Blaine specific surface area value is preferably in the range of 2,000 cm 2 /g or more and 25,000 cm 2 /g or less, and 2,200 cm 2 /g or more and 15,000 cm 2 /g or less is more preferable, and 2,400 cm 2 /g or more and 10,000 cm 2 /g or less is more preferable. Bleeding can be suppressed when the Blaine specific surface area value of the expansive material is equal to or higher than the above lower limit. Further, when the Blaine specific surface area value of the expansive material is equal to or less than the above upper limit value, sufficient expansibility can be obtained.
  • the content of the expansive material used in the present invention is preferably 0.5 parts by mass or more and 20 parts by mass or less, more preferably 1.0 parts by mass or more and 18 parts by mass or less, relative to 100 parts by mass of cement, and 2 parts by mass. More preferably 15 parts by mass or less.
  • the content of the expansive material is equal to or higher than the above lower limit, it becomes easier to obtain the effect of suppressing cracks.
  • the content of the expansive material is equal to or less than the above upper limit, good strength development is achieved.
  • the content of the expansive agent is within the above range, it becomes easy to obtain a grout material that satisfies the effects of the present invention, that is, a grout mortar material that increases fluidity and improves the self-healing effect.
  • the grout material of the present invention can contain a rapid hardening material, together with cement, an expanding material, a gas foaming substance, a water reducing agent, and a fine aggregate, from the viewpoint of promoting setting and increasing strength in a short period of time.
  • the rapid hardening material used in the present invention is not particularly limited as long as it promotes setting and increases strength in a short period of time.
  • the rapid hardening material accelerates the setting, and includes calcium salts of organic acids such as calcium formate, nitrates, sulfates, carbonates, thiocyanates, amines, maleic anhydride, and silicic acid such as water glass.
  • aluminates are preferable, and calcium aluminate (CA) is preferably included from the viewpoint of strength development. Calcium aluminate is more preferable from the viewpoint of good strength development when used in combination with gypsum.
  • the amount of gypsum used is preferably 80 parts by mass or more and 250 parts by mass or less, more preferably 90 parts by mass or more and 220 parts by mass or less, relative to 100 parts by mass of calcium aluminate. It is more preferably not more than parts by mass.
  • Calcium aluminate is obtained by mixing a calcia raw material and an alumina raw material, etc., firing in a kiln, or melting and cooling in an electric furnace, and has hydration activity mainly composed of CaO and Al 2 O 3 .
  • alumina cement alumina cement
  • alumina cement No. 1 and alumina cement No. 2 can be used.
  • amorphous calcium aluminate obtained by melting and then quenching is preferable because it hardens in a shorter time than alumina cement and exhibits high initial strength thereafter.
  • the molar ratio between CaO and Al 2 O 3 is preferably 1.2 or more and 3.0 or less, more preferably 1.7 or more and 2.5. The following are more preferable.
  • the molar ratio is within the above range, the curing time can be further shortened and the initial strength development can be enhanced.
  • the impurity content in the calcium aluminate is preferably 15% by mass or less, more preferably 10% by mass or less, from the viewpoint of early strength development.
  • impurities refer to substances other than CaO and Al 2 O 3 .
  • impurities include silicon oxide, magnesium oxide, and sulfur oxide, but there are also organic substances, alkali metal oxides, alkaline earth metal oxides, titanium oxide, iron oxide, alkali metal halides, and alkaline earth.
  • Some of CaO and Al 2 O 3 are partially substituted or solid-dissolved with metal halides, alkali metal sulfates, alkaline earth metal sulfates, and the like. However, it is not limited to these.
  • the vitrification rate of the calcium aluminate used in the present invention is preferably 70% by mass or more, more preferably 90% by mass or more, in terms of reaction activity. When the vitrification rate is less than 70% by mass, the initial strength development property may deteriorate.
  • the vitrification rate of calcium aluminate is preferably 70% by mass or more, more preferably 90% by mass or more, in terms of reaction activity.
  • the main peak area S of the crystal mineral was measured in advance by the powder X-ray diffraction method for the measurement sample, then heated at 1,000 ° C. for 2 hours, and then cooled at a cooling rate of (1 to 10 ° C.) / min.
  • Vitrification rate X (% by mass) 100 x (1-S/S 0 )
  • the particle size of calcium aluminate is preferably 3,000 cm 2 /g or more, more preferably 5,000 cm 2 /g or more, in terms of initial strength development. When the particle size of the calcium aluminate is at least the above lower limit, the hardening time is shortened, thereby improving initial strength development and improving self-healing performance.
  • the content of the rapid hardening material used in the present invention is preferably 1 part by mass or more and 30 parts by mass or less, more preferably 3 parts by mass or more and 25 parts by mass or less, relative to 100 parts by mass of cement. More preferably, it is 5 parts by mass or more and 20 parts by mass or less.
  • the content of calcium aluminate is preferably 2 parts by mass or more and 20 parts by mass or less, and 3 parts by mass or more and 18 parts by mass with respect to 100 parts by mass of cement. It is more preferably 4 parts by mass or more and 15 parts by mass or less.
  • the content of the rapid hardening material When the content of the rapid hardening material is equal to or higher than the above lower limit, it becomes easier to obtain early curability and crack-suppressing effects. Further, when the content of the rapid hardening material is equal to or less than the above upper limit, good strength development is achieved. When the content of the rapid hardening material is within the above range, the self-healing effect can be easily improved, and a repair mortar material that satisfies the effects of the present invention can be obtained.
  • the gas foaming substance used in the present invention refers to a substance that is used for the purpose of suppressing settlement and shrinkage due to bleeding of the grout material that has not yet hardened after applying the grout mortar composition.
  • the gas-foaming substance used in the present invention is not particularly limited as long as it generates a gas after being kneaded with water.
  • Gas foaming substances include oily substances such as vegetable oils and mineral oils.
  • Examples of the gas-foaming substance include powdery substances such as scaly aluminum powder surface-treated with stearic acid and aluminum powder produced by an atomizing method.
  • Examples of gas foaming substances include nitrogen gas foaming substances such as azo compounds, nitroso compounds and hydrazine derivatives, which foam nitrogen gas in an alkaline atmosphere.
  • Gas foaming substances include percarbonates such as sodium percarbonate, potassium percarbonate and ammonium percarbonate, perborate salts such as sodium perborate and potassium perborate, sodium permanganate and potassium permanganate. and permanganates such as, and peroxides such as hydrogen peroxide.
  • As the gas-foaming substance used in the present invention it is preferable to use aluminum powder surface-treated with stearic acid or the like, since it has a large effect of suppressing subsidence.
  • the nitrogen gas foaming substance used as the gas foaming substance used in the present invention contains a compound that generates nitrogen gas by reaction with alkali generated when the cement contained in the grout material is kneaded with water. and may by-produce gases such as carbon monoxide, carbon dioxide, and ammonia.
  • gases such as carbon monoxide, carbon dioxide, and ammonia.
  • the nitrogen gas foaming substance used in the present invention in order to integrate with the structure, to prevent the unset grout mortar from settling and shrinking, and to keep it in a dry state. It is not particularly limited as long as it can be used to improve the crack resistance when it is broken.
  • the content of the gas foaming substance is preferably 0.0001 parts by mass or more and 1 part by mass or less, more preferably 0.0005 parts by mass or more and 0.5 parts by mass or less, and 0.001 part by mass with respect to 100 parts by mass of cement. Above 0.2 parts by mass or less is more preferable.
  • the content of the gas foaming substance is equal to or higher than the above lower limit, a sufficient initial expansion effect can be imparted.
  • the content of the gas foaming substance is equal to or less than the above upper limit, good strength development is achieved.
  • the water reducing agent used in the present invention helps disperse each material and also plays a role in imparting fluidity to the kneaded grout mortar.
  • the water reducing agent used in the present invention is not particularly limited, and examples thereof include naphthalene-based water reducing agents, melamine-based water reducing agents, aminosulfonic acid-based water reducing agents, and polycarboxylic acid-based water reducing agents. One or two or more of these water reducing agents can be used.
  • Specific examples of the water reducing agent include, for example, naphthalene-based water reducing agents such as NMB Co., Ltd. under the trade name of "Leobuild SP-9 Series", Kao Corporation under the trade name of "Mighty 2000 Series", and Nippon Paper Industries Co., Ltd. under the trade name of "San Flow HS-100” and the like.
  • Examples of melamine-based water reducing agents include those manufactured by Nippon Sika Co., Ltd. under the trade name of "Sikament 1000 series” and those manufactured by Nippon Paper Industries under the trade name of "Sunflow HS-40".
  • Examples of aminosulfonic acid-based water reducing agents include products manufactured by Fujisawa Pharmaceutical Co., Ltd. under the trade name of “Paric FP-200 Series”.
  • As the polycarboxylic acid-based water reducing agent NMB Co., Ltd. trade name "Leobuild SP-8 Series", Grace Chemicals Co., Ltd. trade name "Dalex Super 100 PHX”, and Takemoto Yushi Co., Ltd. trade name "Tupole HP-8 Series”. , “Tupole HP-11 series” and the like.
  • Water reducing agents also exist in powder form. Specifically, as the naphthalene-based water reducing agent, the trade name "Mighty 100" manufactured by Kao Corporation, the trade name “Sanyo Levelon P” manufactured by Sanyo Chemical Industries, and the trade name “Cellflow 110P” manufactured by Daiichi Kogyo Seiyaku Co., Ltd., etc. mentioned.
  • Melamine-based water reducing agents include “Melment F10M” manufactured by BASF Pozzolith.
  • Examples of the polycarboxylic acid-based water reducing agent include "Quinflow 750" (trade name) manufactured by Mitsubishi Kasei Corporation and "CAD9000P” (trade name) manufactured by Kao Corporation.
  • the content of the water reducing agent is preferably 0.1 parts by mass or more and 2 parts by mass or less, more preferably 0.2 parts by mass or more and 1.8 parts by mass or less in terms of solid content, with respect to 100 parts by mass of cement. 3 parts by mass or more and 1.0 parts by mass or less is more preferable. Sufficient fluidity can be obtained when the content of the water reducing agent is equal to or higher than the above lower limit. Moreover, material separation can be suppressed by the content rate of a water reducing agent being below the said upper limit.
  • the proportion of CaO is 85 mass % or more and the proportion of SiO 2 is 0.2 mass % or more and 15 mass % or less.
  • the ratio of CaO and the ratio of SiO 2 are within the above ranges, so that a grout material with high fluidity, neutralization resistance, adhesion strength with reinforcing bars, and excellent rust prevention can be obtained.
  • the proportion of CaO is preferably 87% by mass or more, more preferably 89% by mass or more, and even more preferably 91% by mass or more.
  • the upper limit of the CaO ratio is not particularly limited, it is preferably 99% by mass or less, more preferably 98.5% by mass or less.
  • the proportion of SiO2 is preferably 0.25% by mass or more and 13% by mass or less, more preferably 0.3% by mass or more and 11% by mass or less, and 0.4% by mass or more and 10% by mass or less. It is even more preferable to have Silica sand, calcite, metamorphic rock scapolite, igneous rock quartz, potassium feldspar, etc. are mixed to prepare the fine aggregate so that the chemical components thereof fall within the ranges described above and later described. The chemical components are adjusted by mixing each rock while confirming by fluorescent X-ray diffraction so that they fall within the scope of the present invention.
  • the chemical components of fine aggregates used in the present invention are calculated in terms of oxides.
  • fine aggregate used in the present invention fine aggregate similar to that used for ordinary cement mortar and concrete can be used. That is, river sand, crushed stone, crushed sand, lime sand, silica sand, colored sand, artificial lightweight aggregate, etc. can be used, and these can also be combined.
  • siliceous silica sand or lime sand for purposes of increasing fluidity and self-healing effect, it is preferable to use siliceous silica sand or lime sand. Sufficient fluidity and self-healing effect can be obtained when the particle size of the fine aggregate is within the above range.
  • the content ratio of the fine aggregate is preferably 40 parts by mass or more and 300 parts by mass or less, more preferably 45 parts by mass or more and 275 parts by mass or less, and 50 parts by mass or more and 250 parts by mass with respect to 100 parts by mass of cement. It is more preferably not more than parts by mass. Sufficient fluidity and self-healing effect can be obtained when the content of fine aggregate is within the above range.
  • the grout material of the present invention can contain nitrite from the viewpoint of improving the self-healing effect, along with cement, expansive material, gas foaming substance, water reducing agent, and fine aggregate.
  • nitrites include, but are not limited to, lithium nitrite, sodium nitrite, potassium nitrite, calcium nitrite, magnesium nitrite, and barium nitrite. , lithium nitrite and calcium nitrite, which have no effect on the alkali-aggregate reaction.
  • the form of nitrite is not particularly limited, whether it is powder or solution.
  • the content of nitrite is preferably 2 to 20 parts by mass, more preferably 5 to 18 parts by mass, and even more preferably 7 to 16 parts by mass with respect to 100 parts by mass of cement.
  • the content of nitrite is within the above range, the fluidity can be increased and the self-healing effect can be improved.
  • the grout material of the present invention together with cement, expansive material, gas foaming substance, water reducing agent, and fine aggregate, improves strength development, acid resistance, secures usable life, and has good dimensional stability. It is possible to contain siliceous fine powder from the viewpoint of
  • siliceous fine powder examples include latent hydraulic substances such as blast furnace granulated slag fine powder, fly ash, and pozzolanic substances such as silica fume, among which silica fume is preferred.
  • latent hydraulic substances such as blast furnace granulated slag fine powder, fly ash, and pozzolanic substances
  • silica fume among which silica fume is preferred.
  • the type of silica fume is not limited, it is preferable to use silica fume containing 10% or less of ZrO 2 as an impurity or acidic silica fume from the viewpoint of fluidity.
  • Acidic silica fume means that when 1 g of silica fume is added to 100 cc of pure water and stirred, the pH of the supernatant liquid shows acidity of 5.0 or less.
  • the fineness of the siliceous fine powder is not particularly limited, the Blaine value of the granulated blast furnace slag and fly ash is usually in the range of 3,000 cm 2 /g or more and 9,000 cm 2 /g or less. Silica fume has a BET specific surface area in the range of 20,000 cm 2 /g or more and 300,000 cm 2 /g or less.
  • the content of the siliceous fine powder is preferably 1 part by mass or more and 20 parts by mass or less, more preferably 2 parts by mass or more and 15 parts by mass or less, and further preferably 3 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of cement. preferable.
  • the content of the siliceous fine powder is equal to or higher than the above lower limit, it is possible to improve the strength development, the acid resistance, the working life, and the dimensional stability. Further, when the content of the siliceous fine powder is equal to or less than the above upper limit, the fluidity can be improved and the self-healing effect can be improved.
  • a set modifier an AE agent, a rust inhibitor, a water repellent, an antibacterial agent, a coloring agent, an antifreeze, limestone fine powder, blast furnace slow-cooled slag fine powder, and sewage sludge are used as long as they do not adversely affect performance.
  • Combustion ash and its molten slag Municipal waste incineration ash and its molten slag, admixtures such as pulp sludge incineration ash, antifoaming agents, thickeners, shrinkage reducing agents, steel fibers, vinylon fibers, carbon fibers, and wollaston
  • fibrous materials such as night fibers, polymers, clay minerals such as bentonite and sepiolite, and anion exchangers such as hydrotalcite, etc., within a range that does not substantially hinder the object of the present invention. It is possible to use
  • each material is not particularly limited, and each material may be mixed at the time of construction, or part or all may be mixed in advance.
  • a mixing device any existing device such as a tilting mixer, an omni mixer, a Henschel mixer, a V-type mixer, and a Nauta mixer can be used.
  • the grout mortar composition of the present invention contains the grout material of the present invention described above and water, and is obtained by kneading the grout material and water.
  • the amount of water for kneading in the present invention is not particularly limited because it changes depending on the purpose and application of use and the content ratio of each material, but it is 10 parts by mass or more and 70 parts by mass or less with respect to 100 parts by mass of the grout material. more preferably 14 parts by mass or more and 65 parts by mass or less, and even more preferably 16 parts by mass or more and 60 parts by mass or less.
  • the amount of water for kneading is equal to or more than the above lower limit, it is possible to suppress a decrease in fluidity and an extremely large calorific value.
  • the amount of water for kneading is equal to or less than the above upper limit, it is possible to ensure strength development.
  • the method of kneading the grout material and water is not particularly limited, but a hand mixer with a rotation speed of 900 rpm or more, a normal high-speed grout mixer, or a twin-screw forced mixer can be used. preferable.
  • a predetermined amount of water is put in a container such as a pail or a mixer in advance, and then the grout mortar composition is added while rotating the mixer, and kneaded for 3 minutes or more.
  • a forced mixer for example, it is preferable to previously charge the grout mortar composition into the mixer, add a predetermined amount of water while rotating the mixer, and knead for at least 4 minutes or longer. If the kneading time is less than the predetermined time, the grout mortar may not have adequate fluidity due to insufficient kneading.
  • the kneaded grout mortar is usually pressure-fed to the construction site by a manual injection gun, a diaphragm-type hand pump, or a squeeze-type mortar pump, and filling construction is performed to obtain the grout mortar composition of the present invention. It becomes the hardening body which uses.
  • Experimental example 1 100 parts by mass of cement containing 11.1 parts by mass of expansive material, 0.0025 parts by mass of gas foaming material, 0.5 parts by mass of water reducing agent, and 100 parts by mass of cement containing rapid hardening material, fine aggregate, and nitrite
  • a grout material was obtained by preparing to contain parts by mass shown in Table 1 with respect to parts. Next, for the grout material, the SO 3 content is measured by fluorescent X-ray diffraction, and the MgO content is measured by fluorescent X-ray diffraction.
  • a grout material is prepared by mixing SO3 - containing admixture (material name: potassium sulfate) and MgO-containing admixture (material name: magnesium carbonate) so that the SO3 content and MgO content are as shown in Table 1 below. did. 100 parts by mass of the obtained grout material was kneaded with 23 parts by mass of water to prepare a grout mortar composition. Fluidity and self-healing effect of the prepared grout mortar composition were measured. The results are also shown in Table 1.
  • Table 1 shows the content of ternesite contained in 100 parts by mass of the expanding material.
  • ⁇ Gas foaming substance scaly aluminum powder surface-treated with stearic acid, commercial product
  • Water reducing agent naphthalene-based water reducing agent, commercial product ("CELLFLOW-110P" manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
  • ⁇ Water Tap water
  • ⁇ Fine aggregate Lime sand, 50% below 0.6 mm and 50% between 0.6 and 1.2 mm were used.
  • Rapidly hardened material A Amorphous calcium aluminate adjusted to 43% CaO and 53% Al 2 O 3 , melted and quenched in an electric furnace, vitrification rate of 98% or more, Blaine specific surface area 6,050 cm 2 /g, and a mixture of 100 parts by mass of calcium aluminate and 150 parts by mass of gypsum was used.
  • ⁇ Quick hardening material B calcium formate
  • reagent ⁇ Quick hardening material C calcium nitrate
  • reagent ⁇ Nitrite Lithium nitrite aqueous solution, solid content concentration 40%, parts by mass shown in Table 1 indicate the amount of solid content .
  • ⁇ Measurement items> ⁇ Fluidity: Measured immediately after kneading and 30 minutes after kneading with a J14 funnel run-down value in a 30° C. environment in accordance with JSCE-F 541.
  • the grout material of the present invention contains a specific amount of SO 3 and MgO, so that it is possible to provide a grout material having high fluidity and a self-healing effect, a grout mortar composition, and a grouting method thereof. It can be used in a wide range of applications, such as winding method, filling method of large-sized tassel, anchoring material for reinforcing reinforcing bars, filling other gaps, repairing concrete cross-section, self-leveling floor material, etc., and civil engineering and construction applications.

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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)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

L'invention concerne un matériau liquide qui est constitué d'un ciment, d'une matière expansive, d'une substance moussante au gaz, d'un plastifiant-réducteur d'eau et d'un granulat fin. Ladite matière expansive comprend un ternésite.　Ainsi, l'invention permet de fournir un matériau liquide doté d'une grande fluidité et permettant d'améliorer un effet d'autopolymérisation, une composition de mortier liquide, et un corps durci.
PCT/JP2022/016666 2021-04-26 2022-03-31 Matériau liquide, composition de mortier liquide, et corps durci WO2022230605A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001328856A (ja) * 2000-05-17 2001-11-27 Denki Kagaku Kogyo Kk 無収縮モルタル組成物及び速硬性無収縮モルタル組成物
JP2014525890A (ja) * 2011-08-18 2014-10-02 ハイデルベルクセメント・アクチエンゲゼルシャフト テルネサイト−ベライト−スルホアルミン酸カルシウムクリンカーの製造方法
JP2015187068A (ja) * 2014-03-12 2015-10-29 太平洋セメント株式会社 セメント混和材及びセメント組成物
WO2021039133A1 (fr) * 2019-08-23 2021-03-04 日本高圧コンクリート株式会社 Matériau de type coulis de ciment et procédé de mise en place de celui-ci

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001328856A (ja) * 2000-05-17 2001-11-27 Denki Kagaku Kogyo Kk 無収縮モルタル組成物及び速硬性無収縮モルタル組成物
JP2014525890A (ja) * 2011-08-18 2014-10-02 ハイデルベルクセメント・アクチエンゲゼルシャフト テルネサイト−ベライト−スルホアルミン酸カルシウムクリンカーの製造方法
JP2014527014A (ja) * 2011-08-18 2014-10-09 ハイデルベルクセメント・アクチエンゲゼルシャフト テルネサイトの製造方法
JP2015187068A (ja) * 2014-03-12 2015-10-29 太平洋セメント株式会社 セメント混和材及びセメント組成物
WO2021039133A1 (fr) * 2019-08-23 2021-03-04 日本高圧コンクリート株式会社 Matériau de type coulis de ciment et procédé de mise en place de celui-ci

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