WO2011115245A1 - Matériau à injecter pour la réparation de fissures dans le béton, son procédé de fabrication et méthode d'injection dudit matériau - Google Patents

Matériau à injecter pour la réparation de fissures dans le béton, son procédé de fabrication et méthode d'injection dudit matériau Download PDF

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WO2011115245A1
WO2011115245A1 PCT/JP2011/056528 JP2011056528W WO2011115245A1 WO 2011115245 A1 WO2011115245 A1 WO 2011115245A1 JP 2011056528 W JP2011056528 W JP 2011056528W WO 2011115245 A1 WO2011115245 A1 WO 2011115245A1
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Prior art keywords
injection
concrete
water
dispersant
silica
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PCT/JP2011/056528
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English (en)
Japanese (ja)
Inventor
石田秀朗
八木徹
室川正範
小澤崇志
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電気化学工業株式会社
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Priority to JP2012505761A priority Critical patent/JP5909178B2/ja
Publication of WO2011115245A1 publication Critical patent/WO2011115245A1/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
    • 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
    • C04B28/18—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 mixtures of the silica-lime type
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like

Definitions

  • the present invention is an injection material for repairing concrete cracks, a method for producing the same, and an injection method using the same, and in particular, has excellent permeability even for fine concrete cracks of 100 ⁇ m or less, and has a high water-stopping effect. Further, the present invention relates to an injection material for repairing cracks in concrete that can obtain durability and durability, a manufacturing method thereof, and an injection method using the same.
  • Concrete cracks often occur due to temperature shrinkage during curing, temperature changes after curing, and drying. And even if it is a fine crack of 100 ⁇ m or less, which does not cause a problem in appearance, water penetrates from the crack of the concrete or leaks the contained gas, so repair the fine crack of concrete of 100 ⁇ m or less. There is a need for an injection material.
  • a solution-type silica injection material using water glass as a raw material is known as a highly permeable injection material for cracks in concrete.
  • a water glass alkaline injection material an injection material mainly composed of acidic silica sol, an injection material mainly composed of active silica obtained by treating water glass with a cation exchange resin or an ion exchange membrane, and active silica
  • a silica colloid injection material that has been concentrated and increased in size and has a pH of 9 to 10 and has been stabilized with weak alkali has been used (Patent Documents 1 and 2).
  • the above-described solution-type silica injecting material has a strength (homogen strength) of the injecting material as small as 0.01 N / mm 2 or less. There was a problem that water stoppage and long-term durability were reduced.
  • Ultrafine cement may be used in place of the solution type silica injection material, but the average particle size of the fine particle cement is as large as about 5 ⁇ m. Therefore, the permeability to concrete cracks of 100 ⁇ m or less is poor and better. Therefore, there is a demand for an injection material having high permeability, water stop effect, and durability (Patent Document 3).
  • Patent Document 4 an injection material mainly composed of fine-particle silica has been proposed (Patent Document 4).
  • Patent Document 4 describes that an injection material mainly composed of fine particle silica, which is a material A, is injected into the ground.
  • the fine particle silica when it is injected into the cracks in the concrete, it may react instantaneously with the alkali in the concrete, and the permeability to the cracks in the concrete may not be ensured.
  • pours into the crack of concrete there is no description about the permeability
  • the ground injection material which consists of fine particle silica, an alkaline hardening material, water, and carboxylic acid or its salt was proposed (patent document 5).
  • the above ground injection material has a very long curing time, has no fluidity even at a material age of 3 days, and is so small that the compressive strength cannot be measured.
  • the permeability to a crack of concrete and water stoppage not reducing without the injection material being extruded by water pressure. There is no.
  • Patent Document 6 includes "a method for applying an injection material in which a material A previously containing a pozzolanic substance and water and a material B previously containing a calcium-containing material and water are separately injected” (Claim 1); The invention according to claim 1, wherein the A material contains a dispersant in advance.
  • the average particle size of silica is 1 ⁇ m or less. Neither is it shown that the calcium-containing material is ground and dispersed to 1 ⁇ m or less. That is, in Example 2 of Patent Document 6, the dispersant is used in combination with the A material, but not in the B material. If the A material and the B material are mixed as they are, the A material and the B material need to be injected separately, and the uniformity of the injected material could not be maintained. Further, Patent Document 6 does not show that the calcium-containing substance is pulverized to 1 ⁇ m or less and dispersed.
  • Patent Document 7 there are descriptions of silica, lime, and a dispersant, but there is no description that each of a suspension containing silica and a suspension containing lime contains a dispersant.
  • Patent Document 8 states that “the addition of water and a dispersant to a powdered ultrafine particle material, pulverizing and stirring the ultrafine particle material, adding a dispersant, pulverizing and stirring the ultrafine particle material.
  • a dispersant is added, and the ultrafine particle material is crushed and mixed with the second highly dispersed low viscosity ultrafine particle slurry, and the ultrafine particle material is crushed and stirred.
  • an ultrasonic dispersion process is usually performed as a pre-processing, and therefore, a laser diffraction / scattering type particle size analyzer without performing the ultrasonic dispersion process.
  • the average particle size when measured using is not clear.
  • fine silica powders other than silica fume as the ultrafine particle material, and there is no description about durability when a highly dispersed low viscosity ultrafine particle slurry is used as an injection material.
  • a slurry in which a metal silicon powder concentration in which metal silicon powder is dispersed in water is 20 to 70%, or 5 to 60%, in a flame is at least 10 m / second or more, or at least 20 m.
  • a fine silica powder (fine spherical silica) produced by a method of injecting, burning, and oxidizing at a protruding speed of at least / sec is shown, it is not shown that these fine spherical silicas are used as an injection material.
  • Non-Patent Document 1 describes a grout material (injection material) comprising a mixture of agent A containing ultrafine spherical silica and water, and agent B containing ultrafine calcium hydroxide, a dispersant and water.
  • agent A containing ultrafine spherical silica and water
  • agent B containing ultrafine calcium hydroxide, a dispersant and water.
  • the particle sizes of ultrafine spherical silica and ultrafine calcium hydroxide are each shown to be approximately 1 ⁇ m or less.
  • ultrasonic dispersion treatment is usually performed as a pretreatment. The average particle size when the particle size distribution is measured without performing ultrasonic dispersion treatment is not clear.
  • An object of the present invention is to provide a concrete crack repairing injection material that exhibits high water permeability and exhibits excellent water-stopping effect and durability even for cracks in concrete of 100 ⁇ m or less, a method for producing the same, and a method for using the same. It is to provide an injection method.
  • the above-mentioned fine particle silica is manufactured by a method in which a slurry in which metal silicon powder is dispersed in water is injected into a flame, burned, and oxidized, for repairing a crack in concrete according to (1) It is an injection material.
  • the average particle size of the fine particle silica and the calcium compound is an average particle size measured using a laser diffraction particle size distribution meter without performing ultrasonic dispersion treatment, (1) or (2) Concrete injection material for repairing cracks in concrete.
  • the use amount of the dispersant for the A material is 0.1 to 30 parts by mass in terms of solid content with respect to 100 parts by mass of fine particle silica.
  • the amount of the dispersant for the B material used is 1 to 30 parts by mass in terms of solid content with respect to 100 parts by mass of the calcium compound.
  • An injection material for repairing cracks in concrete according to any one of the items. (10) The concrete crack repairing injection material according to any one of the above (1) to (9), further comprising a curing time adjusting agent. (11) The concrete crack repairing injection material according to any one of (1) to (10), further comprising a polymer dispersion.
  • a suspension containing fine particle silica having an average particle size of 1.0 ⁇ m or less and water is prepared, and a dispersion is added to this suspension, and water is mixed as necessary to perform wet dispersion.
  • a treated A material is produced, while a suspension containing a calcium compound having a mean particle size of 1.0 ⁇ m or less, a dispersing agent, and water is prepared. It is a method for producing a concrete crack repairing injection material, characterized in that water B is mixed and wet pulverized and dispersed to produce material B and the material A and material B are mixed.
  • the above-mentioned fine particle silica is manufactured by a method in which a slurry in which metal silicon powder is dispersed in water is injected into a flame, burned, and oxidized, for repairing a crack in concrete according to (12) It is a manufacturing method of an injection material.
  • the average particle size of the fine particle silica and the calcium compound is an average particle size measured using a laser diffraction particle size distribution meter without performing ultrasonic dispersion treatment (12) or It is a manufacturing method of the injection material for cracking repair of the concrete of said (13).
  • the amount of the dispersant used in the A material is 0.1 to 30 parts by mass in terms of solid content with respect to 100 parts by mass of the fine particle silica (12) to (18) It is a manufacturing method of the injection material for crack crack repair of any one of these.
  • the amount of the dispersant used in the B material is 1 to 30 parts by mass in terms of solid content with respect to 100 parts by mass of the calcium compound The method for producing an injection material for repairing a crack in concrete according to any one of the above.
  • the average particle size of the fine particle silica and the calcium compound is an average particle size measured using a laser diffraction particle size distribution meter without performing ultrasonic dispersion treatment (23) or This is the injection method (24).
  • the injection method according to any one of the above. (31) Of the above (23) to (30), the amount of the dispersant used in the B material is 1 to 30 parts by mass in terms of solid content with respect to 100 parts by mass of the calcium compound The injection method according to any one of the above. (32) The injection method according to any one of (23) to (31), further comprising a curing time adjusting agent. (33) The injection method according to any one of (23) to (32), further comprising a polymer dispersion. (34)
  • the A material and the B material are mixed by any one of a one-shot method, a 1.5-shot method, and a two-shot method, and injected into a crack in the concrete (23 ) To (33).
  • parts and% described in the present invention mean parts by mass and% by mass.
  • fine particle spherical silica powder produced by a method in which a slurry in which metal silicon powder is dispersed in water is injected into a flame and burned and oxidized is used as fine particle silica.
  • This fine-particle spherical silica is preferable in that it has less agglomeration (structure) and has high permeability to concrete cracks.
  • the particle size of the fine particle silica is not particularly limited as long as a desired effect is obtained, but the average particle size is 1.0 ⁇ m or less from the viewpoint of improving the permeability to concrete cracks and the compressive strength.
  • 0.05 to 0.8 ⁇ m is preferable.
  • a slurry having a metal silicon powder concentration of 5 to 70% in which metal silicon powder is dispersed in water in a high-temperature flame formed by a combustible gas and an auxiliary combustion gas is injected at a protruding speed of at least 10 m / second or more.
  • spherical silica powder is produced by melt spheronization.
  • fine particle spherical silica powder having an average particle diameter excellent in fluidity promoting effect can be collected by classification treatment. For example, it can be produced by the methods of Patent Documents 9 to 10.
  • Such fine particle silica has an average value of sphericity of preferably 90% or more, more preferably 95% or more, and particularly preferably 97% or more, from the viewpoint of improving permeability and compressive strength.
  • the sphericity can be measured using a scanning electron microscope (“JSM-T200 type” manufactured by JEOL Ltd.) and an image analyzer (manufactured by Nippon Avionics Co., Ltd.). For example, first, the projected area (A) and the perimeter (PM) of particles are measured from an SEM photograph of powder. When the area of a perfect circle corresponding to the perimeter (PM) is (B), the sphericity of the particle can be displayed as A / B ⁇ 100 (%).
  • JSM-T200 type manufactured by JEOL Ltd.
  • an image analyzer manufactured by Nippon Avionics Co., Ltd.
  • fine particle silica examples include trade names “SFP-20M” and “SFP-30M” manufactured by Denki Kagaku Kogyo Co., Ltd. and trade names “Admafine” manufactured by Admatech.
  • Examples of the calcium compound of the present invention include calcium hydroxide, calcium chloride, inorganic substances such as gypsum, and calcium salts of organic acids such as calcium formate.
  • calcium hydroxide is preferable in terms of improving compressive strength.
  • the calcium compound is calcium hydroxide, a fine calcium oxide produced by a so-called build-up method in which a soluble calcium salt such as calcium chloride and a soluble alkali salt such as sodium hydroxide and potassium hydroxide are dissolved and mixed, respectively. Calcium hydroxide can also be used.
  • the calcium compound is pulverized to an average particle size of 1.0 ⁇ m or less in terms of permeability to concrete cracks and improvement of compressive strength, but is pulverized to an average particle size of 0.05 to 0.8 ⁇ m. It is preferable.
  • the particulate silica and the calcium compound are dispersed in water, respectively, to produce the A material and the B material, respectively.
  • the concentration of fine particle silica in the A material of the present invention is preferably 80% or less, more preferably 10 to 70%, and most preferably 20 to 60%.
  • concentration of the fine particle silica exceeds 80%, the viscosity becomes high and the permeability to concrete cracks may be lowered.
  • this invention it is also possible to manufacture a high concentration fine particle silica slurry beforehand, and to dilute and use with water at the time of construction. Moreover, when it does not permeate at a high concentration, it can be surely injected into small concrete cracks by continuing to inject for a long time at a low concentration of 10% or less, and a high improvement effect can be obtained.
  • the concentration of the calcium compound in the B material of the present invention is preferably 60% or less, more preferably 5 to 50%, and most preferably 10 to 40%. If the concentration of the calcium compound exceeds 60%, the viscosity becomes high and the permeability to cracks in the concrete may decrease. Moreover, in this invention, it is also possible to manufacture a high concentration calcium compound slurry beforehand and to dilute with water at the time of construction.
  • the amount of calcium compound used in the B material of the present invention is preferably 20 to 200 parts, more preferably 50 to 100 parts, based on 100 parts of fine-particle silica. If the amount of the calcium compound is less than 20 parts, the compressive strength may be reduced, and if it exceeds 200 parts, the permeability to concrete cracks may be reduced. Moreover, in this invention, it is also possible to manufacture a high concentration calcium compound slurry beforehand and to dilute with water at the time of construction.
  • the gel time can be shortened or reduced by reducing the amount of dispersant used, which can be used for leak prevention or limited injection.
  • the reason why good permeability can be obtained when the dispersant is used for both the A material and the B material is unknown, but immediately after the dispersant reacts on the surface of the fine particle silica or calcium compound and the fine particle silica and the calcium compound come into contact with each other. This is thought to be due to the delay in curing so as not to cause hydration.
  • naphthalene sulfonic acid-based dispersant As the dispersant used in the present invention, naphthalene sulfonic acid-based dispersant, lignin sulfonic acid-based dispersant, melamine sulfonic acid-based dispersant, polycarboxylic acid-based dispersant, and polyether-based dispersant can be used. Of these, naphthalene sulfonic acid-based dispersants or melamine sulfonic acid-based dispersants are preferred from the viewpoints of permeability to concrete cracks and improvement in compressive strength.
  • the amount of the dispersant for the A material used is preferably 0.1 to 30 parts, more preferably 1 to 10 parts in terms of solid content with respect to 100 parts of the fine particle silica of the A material. If it is less than 0.1 part, it reacts and solidifies at the moment when it is mixed with the other liquid, and the permeability to cracks in concrete may be poor, and if it exceeds 30 parts, the compressive strength may be low. Fine particle silica produced by injecting a slurry of metal silicon powder in water into a flame, burning and oxidizing it has good dispersibility and can be dispersed in water without first adding a dispersant. Therefore, a dispersant may be added later. This water dispersibility is presumed to be related to the silanol group concentration.
  • the amount of the B-material dispersant used is preferably 1 to 30 parts, more preferably 5 to 20 parts in terms of solid content with respect to 100 parts of the calcium compound. If it is less than 1 part, it reacts and solidifies at the moment of mixing with the other liquid, and the permeability to cracks in the concrete may be poor, and if it exceeds 30 parts, the compressive strength may be low.
  • the fine particle silica and the calcium compound are preferably dispersed or pulverized and dispersed by various wet pulverizers.
  • the average particle size referred to here is usually a suspension obtained by wet dispersion treatment or wet pulverization dispersion treatment using a laser diffraction particle size distribution analyzer (for example, “LA-920 type” manufactured by HORIBA, Ltd.) It is the value measured in the aqueous medium without performing the ultrasonic dispersion treatment performed as the pretreatment.
  • the average particle size of the fine particle silica and calcium compound measured without performing ultrasonic dispersion treatment is 1.0 ⁇ m or less, the fine particle silica hardly aggregates.
  • the injection material of this invention improves the permeability to the crack of concrete.
  • the suspension subjected to wet dispersion treatment or wet pulverization dispersion treatment refers to, for example, A material obtained by wet dispersion treatment of fine particle silica and B material obtained by wet pulverization dispersion treatment of calcium hydroxide.
  • the wet pulverizer used when the A material is wet-dispersed and the B material is wet-pulverized and dispersed may be any of a high-speed stirrer, a medium agitating mill, and a pulverizer using high-pressure water.
  • these wet pulverizers in particular, the dispersibility of fine-particle silica is improved, and the shape after pulverization of the calcium compound becomes a cubic shape, and the permeability to concrete cracks is excellent.
  • a pulverizer using high-pressure water is preferable.
  • the high-speed stirrer a structure in which not only the stirrer simply rotates at a high speed but also a so-called turbulent state and a shearing force acts on the particles is preferable.
  • trade names “Sharp Flow Mill” manufactured by Taiheiyo Kiko Co., Ltd., trade names “Homomixer”, “Homomic Line Mill”, and “Homo Dispers” manufactured by Tokushu Kika Kogyo Co., Ltd. are similar.
  • the medium agitating mill is preferably pulverized using beads of 1 mm or less.
  • the media agitation mill for grinding using beads of 1 mm or less As the media agitation mill for grinding using beads of 1 mm or less, the product name “Star Mill” manufactured by Ashizawa Finetech Co., Ltd., the product name “SC-Mill” manufactured by Mitsui Mining Co., Ltd., and the product name “Dual Apex Mill” manufactured by Kotobuki Industries Co., Ltd. Or the like.
  • a pulverizer using high-pressure water applies a high pressure of 50 to 400 MPa to the slurry, branches the slurry into two flow paths, and pulverizes them by colliding against each other at a portion where they rejoin.
  • Such a crusher examples include Sugino Machine's product names “Starburst” and “Ultimizer”, Nanomizer's product name “Nanomizer”, and Microfluidic Corporation's product name “Microfluidizer”. .
  • “starburst” is particularly preferable in that the dispersibility of the fine particle silica is improved, and the shape of the calcium compound after pulverization becomes a cubic shape and the permeability to cracks in the concrete is excellent.
  • polymer dispersions include styrene acrylic copolymers, acrylic copolymers, epoxy resins, ethylene-vinyl acetate copolymers, ethylene-acrylic acid copolymers, ethylene-acrylic acid ester copolymers, and styrene butadiene copolymers. It is preferable to contain 1 type, or 2 or more types selected from the group consisting of coalescence. Of these, an ethylene-vinyl acetate copolymer is more preferable because it is effective in a small amount.
  • the polymer dispersion is usually blended with the A material, but when used in combination with the B material, it reacts immediately with the calcium compound and thickens. Therefore, if a predetermined viscosity is required, blend with the B material. Is also possible.
  • the amount of the polymer dispersion used is preferably 10 parts or less, more preferably 0.1 to 5 parts, and most preferably 0.5 to 3 parts in terms of solid content with respect to 100 parts of the particulate silica of the A material. When the added amount exceeds 10 parts, the viscosity becomes high and the permeability to concrete cracks may be poor.
  • the injection material of the present invention can contain a curing time adjusting agent in order to adjust the curing time.
  • a curing time regulator for example, inorganic salts, such as well-known alkali metal sulfate, alkali metal carbonate, alkali metal bicarbonate, and alkali metal phosphate, gluconic acid, tartaric acid , Citric acid, malic acid, and one or more selected from organic acids such as lactic acid or salts thereof.
  • alkali metal sulfates and / or alkali metal carbonates are preferable from the viewpoint of improving compressive strength, and alkali metal sulfates are more preferable.
  • the alkali metal sulfate include sodium sulfate and potassium sulfate.
  • the amount of the curing time adjuster used is preferably 30 parts or less, more preferably 0.1 to 30 parts, and most preferably 1 to 10 parts with respect to 100 parts of the calcium compound of the B material. If the curing time adjusting agent exceeds 30 parts, the permeability of concrete to cracks may be poor.
  • the mixing ratio of the A material and the B material is preferably 5: 1 to 1: 5, more preferably 2: 1 to 1: 2.
  • a so-called double tube is used to join the A material and the B material at the tip portion and inject them.
  • 2 shot system both A material and B material are mixed and injected on the way from the injection pump to the injection tube, so-called 1.5 shot system, and A material or B material is mixed in a mixing tank such as a mixer.
  • a mixing tank such as a mixer.
  • it can be performed by any method of so-called one-shot method, in which other liquids are added and mixed, and then injected as one liquid.
  • the injection method of the present invention is characterized by injecting the above-mentioned injection material into cracks in concrete.
  • the injection method of the present invention has excellent permeability to cracks of fine concrete of, for example, 100 ⁇ m or less, and can maintain a long-term water stoppage without extruding the injection material even when a high osmotic water pressure acts.
  • the method is related to an injection method, and the above effect can be obtained.
  • Experimental example 1 100 parts of fine particle silica with different particle sizes and types, 5 parts of dispersant ⁇ in terms of solid content, and 100 parts of water are mixed and subjected to a wet dispersion treatment with the product name “Starburst” manufactured by Sugino Machine, and polymer dispersion. Was added to prepare A material (fine particle silica S1 to S7 in A material).
  • a material fine particle silica S1 to S7 in A material.
  • 10 parts of dispersant ⁇ in terms of solid content, and 150 parts of water are mixed, and the product name “Starburst” manufactured by Sugino Machine Co., Ltd. is also used.
  • the fine particle silica was produced by a method in which a slurry in which metal silicon powder was dispersed in water was injected into a flame at a protrusion speed of 2 to 150 m / second, burned, oxidized, and melted into a spherical shape.
  • Fine particle silica S1 slurry having an average particle diameter of 0.05 ⁇ m after wet dispersion treatment, a sphericity of 97%, an amorphization rate of 100%, and a concentration of metal silicon powder in which metal silicon powder is dispersed in water is 30%
  • Fine particle spherical silica fine particle silica S2 produced by a method of injecting, burning and oxidizing at a protruding speed of 150 m / second or more: average particle size 0.1 ⁇ m after wet dispersion treatment, sphericity 97%, amorphous ratio 100%
  • Spherical silica fine particle silica S3 manufactured by a method in which a metal silicon powder dispersed in water and having a metal silicon powder concentration of 30% is injected into a flame at a protruding speed of 120 m / sec or more and burned and oxidized, wet dispersion A slurry having an average particle diameter of 0.8 ⁇ m after treatment,
  • Fine particle spherical silica fine particle silica S4 manufactured by a method of injecting, burning, and oxidizing at a protrusion speed of 100 m / second or more: average particle size 1.0 ⁇ m after wet dispersion treatment, sphericity 96%, amorphous ratio 100%, Spherical silica fine particle silica S5 produced by a method in which a metal silicon powder dispersed in water and having a metal silicon powder concentration of 30% is injected into a flame at a protruding speed of 50 m / sec or more and burned and oxidized, wet dispersion An average particle size of 3.5 ⁇ m after treatment, a sphericity of 95%, an amorphous ratio of 100%, a metal silicon powder dispersed in water with a metal silicon powder concentration of 30% in a flame is a slurry of 2 m / second or more.
  • Fine spherical silica fine particle silica S6 produced by a method of jetting, burning and oxidizing at a protruding speed Ferrosilicon by-product silica fume, average particle size 20 ⁇ m after wet dispersion treatment, reference , Average particle size 5.5 ⁇ m in the case of ultrasonic dispersion treatment, sphericity 86%
  • Fine particle silica S7 Silica sol, average particle size after wet dispersion treatment of 10.1 ⁇ m, reference value, average particle size after ultrasonic dispersion treatment of 9.8 ⁇ m, sphericity of 75%
  • C2 Average particle size after wet pulverization and dispersion treatment 0.1 ⁇ m
  • Calcium hydroxide calcium compound C3 After wet pulverization and dispersion treatment Average particle size 0.8 ⁇ m
  • calcium hydroxide calcium compound C4 average
  • Average particle diameter Laser diffraction particle size distribution meter, trade name “LA-920 type” manufactured by Horiba, Ltd. was used. The A material and the B material were measured in an aqueous medium without performing ultrasonic dispersion treatment. Curing time: The time from when the pouring material was put into the plastic container until the fluidity disappeared even when tilted was defined as the curing time. hr is (hours), min is (minutes). Compressive strength: 4 ⁇ 4 ⁇ 16 cm specimens were prepared, cured for 20 days at 20 ° C. in water, dried for 3 days at 20 ° C. and 80% relative humidity, and the compressive strength of the injected material was measured.
  • Penetration width Penetration test, a 10 ⁇ 10 ⁇ 40 cm concrete specimen centered on a reinforcing bar having a diameter of 11 mm was subjected to bending load to produce a crack of 100 ⁇ m or less, and an injection material was injected. The concrete was cut after the injection material was hardened, and the penetration of the concrete into cracks was confirmed with a stereomicroscope. The minimum crack width that can be checked for injection was defined as the penetration width. The smaller the value, the better the permeability to concrete cracks.
  • Experimental example 2 100 parts of fine particle silica S3, 5 parts of the dispersant ⁇ in terms of solid content, and 100 parts of water are mixed and subjected to a wet dispersion treatment with a product name “Starburst” manufactured by Sugino Machine Co. 3 parts of polymer dispersion P1 was added to prepare A material.
  • the curing time can be adjusted by using a curing time adjusting agent in combination.
  • Experimental example 3 100 parts of fine particle silica S3, a dispersant shown in Table 3 in terms of solid content, and 100 parts of water are mixed, and wet dispersion treatment is performed with a product name “Starburst” manufactured by Sugino Machine Co. 3 parts of polymer dispersion P1 was added to prepare A material. On the other hand, 100 parts of calcium compound C3, the dispersant shown in Table 3 in terms of solid content, and 150 parts of water were mixed, and similarly wet-pulverized and dispersed with the trade name “Starburst” manufactured by Sugino Machine Co. The same procedure as in Experimental Example 1 was conducted except that 5 parts of a curing time adjusting agent was added to 100 parts of the calcium compound C3 to prepare a B material. The results are also shown in Table 3.
  • Dispersant ⁇ Melamine sulfonic acid dispersant, commercially available product, liquid, solid concentration 40%
  • Experimental Example 4 100 parts of fine particle silica S3, 5 parts of the dispersant ⁇ in terms of solid content, and 100 parts of water are mixed and subjected to a wet dispersion treatment with a product name “Starburst” manufactured by Sugino Machine Co. 3 parts of polymer dispersion P1 was added, and A material was produced in the same manner as in Experimental Example 1.
  • 100 parts of calcium compound C3, 10 parts of dispersant ⁇ in terms of solid content, and 150 parts of water are mixed and subjected to wet pulverization and dispersion treatment under the trade name “Starburst” manufactured by Sugino Machine Co.
  • a material B was prepared in the same manner as in Experimental Example 1 by adding 5 parts of a curing time adjusting agent to 100 parts of the compound C3.
  • the manufactured A material and B material were mixed in the same manner as in Experimental Example 1 except that the amount of calcium compound used was mixed as shown in Table 4 with respect to 100 parts of fine particle silica S3 to prepare an injection material. It was. The results are also shown in Table 4.
  • Experimental Example 5 100 parts of fine particle silica S3, 5 parts of the dispersant ⁇ in terms of solid content, and water shown in Table 5 are mixed, wet dispersed with a trade name “Starburst” manufactured by Sugino Machine Co., and 100 parts of fine particle silica S3 3 parts of the polymer dispersion P1 was added to the A material in the same manner as in Experimental Example 1.
  • 100 parts of commercially available calcium hydroxide (average particle size 9.5 ⁇ m), 10 parts of dispersant ⁇ in terms of solid content, and water shown in Table 5 were mixed, and the product name “Starburst” manufactured by Sugino Machine Co., Ltd.
  • ⁇ Curing time, compressive strength, and penetration width can be adjusted by changing the concentrations of A and B materials.
  • the concrete crack repairing injection material of the present invention is used, for example, in the following applications.
  • the injection method of the present invention can be applied not only to concrete but also to fine cracks such as mortar and bedrock.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Bridges Or Land Bridges (AREA)
  • Aftertreatments Of Artificial And Natural Stones (AREA)
  • Sealing Material Composition (AREA)

Abstract

Matériau à injecter pour la réparation de fissures dans le béton, qui est remarquable en termes de pouvoir d'arrêt de l'eau et de longévité, et qui offre une perméabilité élevée, même dans le cas de fissures microscopiques. L'invention concerne également un procédé de fabrication de ce matériau et une méthode d'injection de ce dernier. Le matériau à injecter de l'invention qui est destiné à la réparation de fissures dans le béton est constitué d'un matériau (A) comprenant de l'eau, un agent dispersant et de la silice particulaire dont la taille des particules est de 1,0 μm ou moins, et un matériau (B) comprenant de l'eau, un agent dispersant et un composé de calcium dont la taille des particules est de 1,0 μm ou moins. Ce composé de calcium et un hydroxyde de calcium. Pour la fabrication de la silice particulaire et du composé de calcium, on utilise une broyeuse à eau haute pression, un mélangeur grande vitesse et une meule à agitation de milieu. Le matériau à injecte contient une dispersion polymère et un régulateur de durcissement contrôlé dans le temps. Sont également décrits un procédé de fabrication du matériau et une technique d'injection de ce matériau.
PCT/JP2011/056528 2010-03-19 2011-03-18 Matériau à injecter pour la réparation de fissures dans le béton, son procédé de fabrication et méthode d'injection dudit matériau WO2011115245A1 (fr)

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JP2012505761A JP5909178B2 (ja) 2010-03-19 2011-03-18 コンクリートのひび割れ補修用注入材、その製造方法、及びそれを用いた注入工法

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
EP2586846A4 (fr) * 2010-06-25 2013-10-30 Denki Kagaku Kogyo Kk Matière pour injection, procédé de production de matière pour injection et procédé d'injection
JP2015040271A (ja) * 2013-08-23 2015-03-02 電気化学工業株式会社 注入工法
JP2015040272A (ja) * 2013-08-23 2015-03-02 電気化学工業株式会社 注入工法
US9261401B2 (en) * 2013-06-11 2016-02-16 Canon Kabushiki Kaisha Apparatus configured to generate terahertz wave and apparatus configured to detect terahertz wave
JP2016204924A (ja) * 2015-04-20 2016-12-08 鹿島建設株式会社 水中構造物補修用の硬化性組成物及びそれを用いて行う水中構造物の補修方法

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JP2007269536A (ja) * 2006-03-31 2007-10-18 Sumitomo Osaka Cement Co Ltd 無機系弾性ひび割れ注入材
JP2009062444A (ja) * 2007-09-05 2009-03-26 Denki Kagaku Kogyo Kk 注入材及び注入工法
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JP2006241316A (ja) * 2005-03-03 2006-09-14 Taiheiyo Material Kk 注入材
JP2007131484A (ja) * 2005-11-10 2007-05-31 Denki Kagaku Kogyo Kk 膨張材、セメント組成物、及びそれを用いたセメントコンクリート
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JP2007269536A (ja) * 2006-03-31 2007-10-18 Sumitomo Osaka Cement Co Ltd 無機系弾性ひび割れ注入材
JP2009062444A (ja) * 2007-09-05 2009-03-26 Denki Kagaku Kogyo Kk 注入材及び注入工法
JP2009299291A (ja) * 2008-06-10 2009-12-24 Denki Kagaku Kogyo Kk 注入材の施工方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2586846A4 (fr) * 2010-06-25 2013-10-30 Denki Kagaku Kogyo Kk Matière pour injection, procédé de production de matière pour injection et procédé d'injection
US9261401B2 (en) * 2013-06-11 2016-02-16 Canon Kabushiki Kaisha Apparatus configured to generate terahertz wave and apparatus configured to detect terahertz wave
JP2015040271A (ja) * 2013-08-23 2015-03-02 電気化学工業株式会社 注入工法
JP2015040272A (ja) * 2013-08-23 2015-03-02 電気化学工業株式会社 注入工法
JP2016204924A (ja) * 2015-04-20 2016-12-08 鹿島建設株式会社 水中構造物補修用の硬化性組成物及びそれを用いて行う水中構造物の補修方法

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