WO2005026073A1 - Article forme partiellement hydrolyse obtenu a partir d'une composition hydraulique, son procede de production et son procede d'utilisation - Google Patents

Article forme partiellement hydrolyse obtenu a partir d'une composition hydraulique, son procede de production et son procede d'utilisation Download PDF

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Publication number
WO2005026073A1
WO2005026073A1 PCT/JP2004/005558 JP2004005558W WO2005026073A1 WO 2005026073 A1 WO2005026073 A1 WO 2005026073A1 JP 2004005558 W JP2004005558 W JP 2004005558W WO 2005026073 A1 WO2005026073 A1 WO 2005026073A1
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WO
WIPO (PCT)
Prior art keywords
hydraulic composition
partially hydrated
water
molded product
hydrated molded
Prior art date
Application number
PCT/JP2004/005558
Other languages
English (en)
Japanese (ja)
Inventor
Noriyuki Kosakai
Tetsuya Sakaki
Takayuki Kaneyoshi
Akihiro Kusatsu
Yoshii Koyama
Original Assignee
Sumitomo Osaka Cement Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Osaka Cement Co., Ltd. filed Critical Sumitomo Osaka Cement Co., Ltd.
Publication of WO2005026073A1 publication Critical patent/WO2005026073A1/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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C04B7/40—Dehydrating; Forming, e.g. granulating
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/02—Selection of the hardening environment
    • C04B40/0277—Hardening promoted by using additional water, e.g. by spraying water on the green concrete element
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/02—Portland cement
    • 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
    • C04B2103/0075—Anti-dusting agents
    • 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
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00077—Partially hardened mortar or concrete mixtures

Definitions

  • the present invention relates to a partially hydrated molded product of a hydraulic composition, a method for producing the same, and a method for using the same.
  • various uses in which the hydraulic composition is used for example, crack fillers, static crushed materials, Partial hydration of hydraulic compositions that can be distributed and used in a simple form as various mortar premix products, various concrete premix products, various filling materials, backfilling materials, etc.
  • the present invention relates to a molded article, a method for producing the same, and a method for using the same. Background art
  • a hydraulic composition is packaged in a moisture-proof paper bag, a plastic bag, or the like, as its own powder, or as a mixed powder obtained by premixing these materials with aggregates and various additives. It is in circulation.
  • cement-based materials are currently distributed in packages of 20 to 25 kg.
  • the bagged hydraulic composition is generally opened in a bag, charged into a stirring vessel or a stirring mixer, and kneaded by adding a predetermined amount of water.
  • the kneaded mortar or concrete is prepared in advance. It is poured or poured into a mold, and is appropriately compacted, for example, by vibrating a vibrator or the like to adjust material separation and the like, and then left to cure.
  • the hydraulic composition has a true specific gravity of 2 to 3, it has a bulk specific gravity of about 1 and requires twice the volume of its actual weight, making it difficult to fill bags into compacts, and transporting and handling on-site. However, it is extremely hard work.
  • the hydraulic composition is contained in a moisture-proof bag, it has a high reactivity to moisture and moisture in the air. For this reason, the storage period is currently at most about 6 months.
  • bags containing the hydraulic composition are generated, which is a waste of resources and waste.
  • bags containing hydraulic compositions such as cement are difficult to burn and are difficult to incinerate.
  • a method for repairing and reinforcing concrete cracks generally, first, the area around the cracks is cleaned to remove foreign matter, and depending on the width of the cracks, equipment such as a cut-off tool may be used. The area around the crack is cut into a V-shape, and then sealed with a resin-based sealing agent, etc., to crack the main hydraulic composition. The method of injecting the material is used.
  • the conventional method is excellent in repairing cracks, but the repaired part often differs in color from the original body, and is not satisfactory from the viewpoint of the aesthetic appearance of the structure.
  • the hydraulic composition is quickly kneaded with water in a rubber container or the like, and the kneaded material is rubbed by hand by pressing the kneaded material into a predetermined water leakage location.
  • this method is extremely inefficient.
  • the hydraulic composition In the case of statically crushed materials, the hydraulic composition is mixed with water and poured into pre-drilled rocks and concrete holes, and the crushing effect is enhanced by the strong expansion force accompanying hydration. It has gained.
  • a paste obtained by kneading a static crushing agent and water has a specific gravity of 2 or more and is heavier than water.
  • a method is used in which water is replaced due to a difference in specific gravity, and the paste can be filled in the perforation.
  • a method is used in which a sachet is filled with a static crushing agent and the bag is directly pushed into the perforation.
  • the water required for hydration and expansion of the static crushing agent is supplied through a filled cloth bag.
  • Such a method can prevent the static crushing agent from diffusing, but it is extremely difficult and inefficient to pack the bag tightly into the hole in the water, and it is not always necessary to follow the shape of the hole. Unnecessary voids have been created in the holes due to the lack of close packing.
  • the hole-in anchor is a general-purpose tool that is used for many purposes in concrete work on a daily basis, such as holding the formwork during concrete work. It is often removed when construction is completed. After removal, many holes with a diameter of usually 6 to 20 mm and a depth of about 100 mm remain as traces on the concrete surface.
  • cement, sand, an appropriate amount of water, and premix mortar material for repairs are manually filled, and post-filling is currently performed.
  • Patent No. 25146468 discloses a method of molding and solidifying a hydraulic composition powder, which includes cement, slag, 5 to 95 parts by weight of a hydraulic composition composed of at least one of gypsum, 5 to 95 parts by weight of quicklime or magnesia lime or a mixture thereof, and a disintegration aid for the above hydraulic composition
  • a molded article which is prepared by mixing 0.5 to 1.5% by weight of an agent, pressing the mixture, and molding the mixture into a briquette.
  • a molded article contains a hydraulic composition, but the molded article is produced by simply pressing and compressing the raw material powder, and is fragile and in a distribution form. The form of use is not enough to solve the above problems.
  • An object of the present invention is to solve the above problems, reliably prevent the generation of dust of the hydraulic composition powder during distribution and use, enable long-term storage, and simplify the form of use.
  • An object of the present invention is to provide a partially hydrated molded article of a hydraulic composition.
  • Another object of the present invention is to provide a method for producing a partially hydrated molded body of a hydraulic composition, which can efficiently, easily and economically mold the above partially hydrated molded body. That is.
  • Another object of the present invention is to provide a method for using a partially hydrated molded body of a hydraulic composition, which can easily and effectively utilize the above partially hydrated molded body for various uses. To provide. Disclosure of the invention
  • the present inventors can solidify the hydraulic composition to such an extent that the hydraulic composition maintains its self-form even with a water amount less than the theoretical water amount, and furthermore, allows the hydration activity to remain in the partially hydrated molded body. , Use by this And found that by supplying water at a desired timing later, a fully hydrated cured product can be obtained by utilizing the remaining hydration activity, and reached the present invention. did.
  • a hydrated cured product of a hydraulic composition is a molded product that is poured into a mold and cured, so that a hydration reaction is inseparable to form a molded product. It was thought that a compact could not be obtained without it.
  • the present invention separates the hydration reaction into two parts, a "part necessary for maintaining the shape" and a "physical performance value such as strength and durability".
  • a molded article is formed by using a hydration reaction of a degree necessary for maintaining the shape of the self-formed form, and the latter hydration reaction uses the hydration activity remaining in the molded article to reduce the hydration activity during use. It is said that "water is supplied later" for use at the free timing in this case, and thereby it is possible to obtain the same curing performance as the conventional hydrate cured product. It is based on knowledge.
  • the partially hydrated molded article of the hydraulic composition of the present invention is characterized in that the hydraulic composition is partially hydrated and hardened to the extent that the shape can be maintained.
  • the hydraulic composition and water are mixed at a weight ratio of 99 ::! To 50:50 parts by weight, and the weight ratio of the added water at this time is If the hydraulic hydration of the hydraulic composition is more than the theoretical hydration amount, that is, if the weight ratio of water to 100 parts by weight of the hydraulic composition is about 27 to 28 parts by weight or more, the hydration reaction in progress During the process, the amount of water is less than the theoretical hydration amount, Water is forcibly evaporated and removed so that the weight ratio becomes less than 28 parts by weight, the shape is maintained, and the unhydrated portion remains. .
  • the partially hydrated molded product of the hydraulic composition of the present invention is preferably further characterized by further containing a polymer compound.
  • the method for producing a partially hydrated molded product of the hydraulic composition of the present invention comprises molding a hydraulic composition by mixing a hydraulic composition with a stoichiometric amount or more of water at which the hydraulic composition exhibits a complete hydration reaction.
  • the hydration progresses to a stage where the self-shape can be maintained, the hydration is forcibly dried to partially retain the hydration activity.
  • another method for producing a partially hydrated molded product of the hydraulic composition of the present invention comprises the steps of: preparing a hydraulic composition and water in an amount smaller than the theoretical amount at which the hydraulic composition exhibits a complete hydration reaction. It is characterized in that the mixture is mixed, the hydration reaction of the obtained mixture is allowed to proceed, and the hydration reaction is advanced to form the mixture, and hydration activity is partially left.
  • the molding is performed by press molding, extrusion molding, or injection molding.
  • a polymer compound is further substituted for part of the water and contained.
  • the method of using the partially hydrated molded product of the hydraulic composition of the present invention is as follows: water is added to the partially hydrated molded product of the hydraulic composition of the present invention to complete and harden the remaining hydration activity. Crack repair material It is characterized by being effectively used for various purposes such as.
  • the partially hydrated molded product of the hydraulic composition is filled and applied to a surface of a crack of a structure, and then a conventional crack is formed. It is characterized in that an injection material is used as a crack filler for filling the inside of the crack and repairing the crack.
  • the partially hydrated molded article of the hydraulic composition of the present invention is obtained by partially hydrating and hardening the hydraulic composition to such an extent that the shape can be maintained. It is hydrated and hardened, and contains the unhydrated part.
  • the partially hydrated molded article of the present invention which maintains its morphology while maintaining its hydration activity can be formed by conventional hydration hardening at the time of use, that is, by "adding water later". It can be used for various purposes by completing the hydration reaction to the same performance as the body and hardening it.
  • the “partially hydrated molded article” in the present specification refers to
  • JISR 5202 “Cement loss on ignition” is 25% by weight or less, preferably 15% by weight or less, Molded so that it can be used for the method of use described in the examples described later. Shall mean.
  • the partially hydrated molded article of the present invention has, for example,
  • the hydraulic composition used in the partially hydrated molded article of the present invention can consist only of hydraulic powder as a powder material.
  • hydraulic powder refers to a powder that hardens when exposed to water, and is preferably ordinary cement, jet cement, aluminum cement, or ultra-fast cement.
  • the particle size of the hydraulic powder is not particularly limited, an average particle size of about 10 to 40 m is preferable from the viewpoint of the pot life during molding and the strength of the obtained molded body.
  • the specific surface area of the branes is 250 cm 2 / g or more.
  • hydraulic composition used in the present invention may contain a non-hydraulic powder in addition to the above-mentioned hydraulic powder.
  • the non-hydraulic powder alone hardens even when it comes into contact with water.
  • a powder that does not have a solid content but also includes a powder that elutes in an alkaline or acidic state or in a high-pressure steam atmosphere and reacts with other already-eluted components to form a product. It is.
  • Non-hydraulic powders include calcium hydroxide powder, gypsum gypsum powder, calcium carbonate powder, slag powder, fly powder, silica powder, clay powder and silica fume powder. At least one kind of powder selected from the group can be suitably used.
  • non-hydraulic powders have a function of increasing the strength by the Pozzolanic reaction or the microfiller effect.
  • the average particle size of these non-hydraulic powders is preferably at least one order of magnitude smaller than the average particle size of the hydraulic composition powder, and more preferably at least two orders of magnitude smaller. It is preferable because it fills the gaps of the hydraulic powder and the compact becomes dense, but the lower limit of the fineness is not particularly limited, and is particularly limited unless the effect of the present invention is impaired. However, it is usually preferred that the average particle diameter of the hydraulic powder is about 1Z500 from the viewpoint of maintaining good moldability.
  • the shape maintenance of the formed body can be further improved.
  • the hydraulic composition and water are in a weight ratio of 99 ::! To 50:50:50 parts by weight, preferably 8:50. 0: 20 to 95: 5 parts by weight.
  • the weight ratio of the water added at this time is In the case where the amount of water is more than the theoretical hydration amount of the composition, that is, when the weight ratio of water to 100 parts by weight of the hydraulic composition is about 27 to 28 parts by weight or more, during the hydration reaction,
  • the hydraulic composition is formed by forcibly evaporating and removing water so that the water content is less than the theoretical hydration amount, that is, the water content is less than 28 parts by weight. .
  • the theoretical hydration amount of the hydraulic composition is, for example, in the case of ordinary ordinary Portland cement, the theoretical amount of ordinary Portland cement, that is, The amount of water required for the entire mineral composition of Portland cement to be hydrated by the hydration reaction, for example, usually 100 parts by weight of Portland cement Water is 27 to 28 parts by weight. Specifically, if 100 g of ordinary Portland cement and 28 g of water are mixed and cured well, hydration proceeds completely over time and complete water Although a sum-cured product is obtained, it represents the amount of water enough to obtain this fully hydrated cured product.
  • the droplet diameter of water added to the hydraulic composition is smaller than or equal to the powder diameter of the hydraulic composition. It is preferable because a uniform mixture can be obtained without forming so-called "kneading dough" in the mixed wet powder.
  • the partially hydrated molded article is used for various purposes and is brought into contact with water to proceed with the hydration reaction, for example, in repairing cracks, no trace of the color of water is left, and it is almost the same as the original body. The same colors can be obtained, and good aesthetics can be maintained.
  • a static crushing material appropriate expansion is obtained, and crushing efficiency is improved.
  • a polymer compound such as a water-soluble polymer compound can be mixed and dispersed as necessary, and is preferably kneaded with the hydraulic composition.
  • the flowability can be reduced.
  • Such a polymer compound has a function of contributing to the improvement of the moldability, the performance improvement in the final use phase, and, for example, the enhancement of the adhesive strength in the partially hydrated molded article of the present invention.
  • water-soluble polymers examples include polyalkylene glycols represented by poly (ethylene glycol), polymethylene glycol, etc .; polyvinyl alcohols such as poval; Cellulose or cellulose ethers such as oxymethylcellulose, hydroxycetylcellulose, and thiothionated cellulose; methyl vinyl ether such as VEMA (Vema) and maleic anhydride copolymer; starches; and alcohols And poly (ethylene oxide) obtained by ring-opening polymerization of ethylenoxides such as those described above.
  • these polymer compounds are used as such or mixed as a polymer emulsion. be able to.
  • the partially hydrated molded product of the hydraulic composition of the present invention is obtained by kneading and mixing water and the hydraulic composition at the mixing ratio described above, then molding, and hydrating to a level that maintains an original shape after molding. It is manufactured by demolding and forced drying at the stage where it has advanced.
  • a molding method an injection molding method, an extrusion molding method, a pressure molding method, a casting method, or the like can be used, but the molding method is not limited thereto.
  • a known molding method can be used.
  • the above-mentioned hydraulic composition and water are mixed at the above-mentioned mixing ratio, and the mixing method is arbitrary. It is possible to mix using a known method.
  • a mixing method capable of applying a strong shear force is used. It is preferable to employ a method, for example, kneading using a pro-share mixer or the like. The time required for mixing can be reduced by kneading using a mixer having such a high shearing force.
  • the hydraulic composition is mixed with a smaller amount of water than the theoretical amount at which the hydraulic composition exhibits a complete hydration reaction. Thereby, a wet powder is obtained, and the hydration reaction of the powder proceeds to form a molded body capable of maintaining its own shape. Is left. If the hydration reaction proceeds to a stage where the self-form can be maintained, forced drying can be performed at some stage during the hydration reaction, if necessary.
  • any method can be used as long as the method is a method of uniformly adding the hydraulic composition and water.However, the wet powder obtained by adding the above amount of water to the hydraulic composition is used. For stable production, care must be taken to avoid so-called kneading.
  • the droplet diameter of the water to be added be smaller than the particle diameter of the hydraulic composition powder.
  • a special spray nozzle which is preferably a commercially available dry fog nozzle and can spray a droplet having a diameter equal to or smaller than that of powder particles.
  • a method in which the powder of the hydraulic composition is charged into a mixer, and the mixer is rotated or mixed to continuously spray and supply the dry fog is preferably used.
  • the forced drying in the hydration step can be performed by means such as heating or pressurization.
  • the forced drying may cause harmful conditions such as cracks, but for example, forming a very small cross-sectional shape with a diameter of about 10 mm If it is a body, the desired partially hydrated molded body can be obtained without causing harmful cracks.
  • Such a method for producing a partially hydrated molded article involving a forced drying step can be used not only for casting but also for extrusion molding and the like.
  • the hydraulic composition is mixed with a sufficient amount of water that is sufficient for the hydraulic composition to be completely hydrated, and the hydration is performed until the self-form can be maintained.
  • the present invention A partially hydrated molded product of the hydraulic composition can also be produced.
  • a mixture in the form of a wet powder obtained by adding about 100 parts by weight of water to 100 parts by weight of a hydraulic composition is not suitable for conventional casting molding or the like.
  • water is added to and mixed with 100 parts by weight of the hydraulic composition up to about 50 parts by weight so that cast molding is possible, and the mixture is formed into a mold having a desired shape.
  • the mold is demolded, and is further forcibly dried to remove water used for the subsequent hydration reaction.
  • pressure molding is used as a molding method capable of obtaining the partially hydrated molded object of the present invention, the obtained hydraulic composition is used.
  • a molding pressure of, for example, about 500 kg Zcm 2 or less, and solidifying the mold.
  • the surface of the obtained partially hydrated molded article can be subjected to an extremely thin coating treatment such as paraffin wax or an organic paint.
  • an extremely thin coating treatment such as paraffin wax or an organic paint.
  • the partially hydrated molded article obtained in this manner maintains the shape of the molded article and has a moderate disintegration property when used, so that the water stopping material, crack filler, static crushed material, It can be used as various mortar premix products, various concrete premix products, various hole filling materials and backfilling materials, and can improve the work efficiency.
  • the partially hydrated molded article of the present invention has a value of about 0.5 to 1.7 in bulk specific gravity from the viewpoint of shape maintenance and working efficiency.
  • the partially hydrated molded product of the hydraulic composition of the present invention is given a shape in a state where water is theoretically insufficient, and realizes demolding in a short time.
  • the partially hydrated molded product of the hydraulic composition of the present invention is required to have a water-stopping material, a crack filling material, a static crushed material, various mortar premix products. After it is used as various concrete premix products, various filling materials and backfilling materials, it is necessary to supply water and harden it.
  • a partially hydrated molded product of the hydraulic composition of the present invention is manufactured into a desired shape, for example, a chalk-shaped molded product.
  • Such a chalk-like partially hydrated molded product can be used to reduce cracks generated in concrete, tiles, or painted walls. By rubbing along, it collapses easily and is effectively filled with cracks.
  • the filled material is a partially hydrated material, that is, the hydration reaction is rapidly performed since the hydration activity still remains. It starts and hardens within the crack, which completes the crack filling.
  • the tip of the partially hydrated molded article of the present invention formed into a desired shape for example, a chalk
  • a desired shape for example, a chalk
  • the hydration reaction is completed in a short time.
  • the hydration reaction is completed within a few minutes, which makes it possible to repair cracks in a short time and easily.
  • anyone can repair cracks easily.
  • the partially hydrated molded article of the present invention does not contain a binder, powder that has protruded or adhered to the periphery during repair can be easily removed with, for example, a brush or a brush. For example, it is extremely excellent in aesthetics after being used as a crack filler.
  • the repaired part obtained is excellent in waterproofness, the color difference after the repair is almost the same as that of the original body, and the aesthetic appearance can be maintained extremely effectively.
  • the partially hydrated crack filler of the present invention is rubbed against a target crack, and at this time, the surface portion is used as a filling port for a conventional crack filler to be filled later.
  • the surface portion is used as a filling port for a conventional crack filler to be filled later.
  • the crack filler of the present invention is left without being rubbed.
  • water is provided by removing a portion of the crack filler of the present invention that has protruded from the crack with a brush or the like, and pressing a sponge or the like containing water against the filled crack filler of the present invention.
  • the partial hydrate is referred to as a complete hydrate.
  • the crack filler of the present invention for example, ultra-rapid hardened cement is used, the curing is quickly completed, and at this point, the aesthetic appearance of the cracked portion is maintained and a part is closed. Is completed.
  • the crack filling material for example, product name: Ultrafine cement-based crack injection material refill filler, Sumitomo Osaka Cement Co., Ltd. Kneaded into the cracks, for example, with an Acryl syringe.
  • the method fills the inside of the crack with the conventional crack-injected material densely and reliably repairs the crack, while the crack-filling material of the present invention is applied to the surface of the crack.
  • This sealant keeps the surface aesthetically pleasing and prevents the conventional crack injection material from leaching. It is possible to express the function as a material. By blocking the cracks in this way, it is possible to prevent water from penetrating into the concrete body from the cracks, and to prevent corrosion of the internal reinforcing steel, and as a result, the concrete The durability of the frame is improved.
  • the partially hydrated molded product of the hydraulic composition of the present invention is formed into a desired shape, for example, a hollow cylindrical shape.
  • underwater crushing refers to, for example, the crushing of existing underwater concrete structures in the extension or renovation of underwater concrete structures in ports and harbors.
  • the statically crushed material composed of the partially hydrated molded product of the hydraulic composition of the present invention is formed in advance in a partially hydrated state, for example, in the form of a rod to form a hole. Since the insertion into the inside is only insertion of such a rod-shaped molded body, it can be made extremely simple.
  • a hydration reaction can be carried out efficiently by forming a small water passage hole of about 1 to 2 mm in the length direction of the center of the partially hydrated molded product. it can.
  • the anchor mark is left as it is, holes will be formed in the concrete.
  • the anchor marks are usually small holes with a diameter of about 17 mm and a depth of about 120 mm.
  • the upper part of one bridge a bridge girder on a pier
  • thousands of anchor traces may be backfilled during the work.
  • mortars kneaded in small amounts are manually filled one by one using thin rods or saji.
  • such an approach is extremely inefficient.
  • the partially hydrated molded article of the present invention having substantially the same dimensions as the anchor mark is formed in advance into, for example, a diameter of about 17 mm and a length of about 120 mm, and this is hammered into the hole.
  • a certain amount of water for example, about 30% by weight of the weight of the compact, hydration occurs and the backfilling operation can be completed.
  • the partially hydrated molded article of the present invention may be immersed in water for several minutes to several hours in advance, and when it becomes soft by absorbing water, it may be hammered into the hole with a hammer or the like as described above. With this, the backfill work can be completed.
  • the partially hydrated molded product of the hydraulic composition of the present invention can be immediately water-adjusted by adjusting the amount of water added at the time of initial molding and the molding pressure at the time of pressure molding in order to maintain its original shape. It can be made into a “sparse” compact that can penetrate. Such a sparsely formed body has a void inside itself that allows water to quickly penetrate.
  • kneading can be performed in the same manner as when powder is charged. Less mortar (still unconsolidated mortar) can be obtained in a short time.
  • the partially hydrated molded article of the present invention can be rapidly mixed with water to produce a uniform fresh mortar, and the obtained mortar has the same level of strength development as conventional products.
  • the amount of water is less than 3% by weight, the formability and the shape retention are difficult, so that the amount of water is particularly preferably about 3 to 10% by weight.
  • the partially hydrated molded article of the hydraulic composition of the present invention can maintain its shape as a molded article, can be easily disintegrated at the time of use, and can improve its working efficiency. it can. Further, since the hydraulic composition can be easily formed into a desired shape and solidified, it can be used for various uses other than those described above. In this case, no dust is generated and the environment can be maintained extremely well.
  • the partially hydrated molded product of the hydraulic composition of the present invention can prevent long-term storage by preventing weathering.
  • the method for producing a partially hydrated molded product of the hydraulic composition of the present invention comprises efficiently, simply and economically producing the partially hydrated molded product. Enable to shape.
  • the method of using the partially hydrated molded product of the hydraulic composition of the present invention can achieve curing of the hydraulic composition by replenishing water when used.
  • it can be used in a wide range of applications and can be easily handled.
  • any person can easily and reliably fill and repair cracks and the like without any special tools or techniques. It is possible to prevent moisture from entering into the concrete and prevent the internal rebar from developing, thereby preventing deterioration and breakage of the concrete and the like. can do.
  • Water-blocking material made from ultra-rapid cement as a hydraulic composition
  • the wet mixture is put into an extruder and formed into a slender columnar shape having a diameter of 17 mm and a length of 90 mm, just like a choke, and is used as a crack filler of the present invention.
  • a partially hydrated molded product of the hydraulic composition was produced.
  • the obtained partially hydrated molded article had an ignition loss value (Idanishion loss) of 18% by weight specified in “Ice loss on ignition of cement” in JIS522. Comparative Examples 1 to 3
  • Water-stopping material (trade name: Lioncis 101, manufactured by Sumitomo Osaka Cement Co., Ltd.) and a water-soluble polymer (trade name: PEO) made from ultra-fast cement as a hydraulic composition -1, manufactured by Sumitomo Seika Co., Ltd.) and weighed so that the water-blocking material (powder): water-soluble polymer (powder) has a weight ratio of 9: 1, and coarsely mixed. Mix at 85 for 15 minutes to obtain a uniform flowing mixture.
  • the mixture is introduced into an extruder, extruded in a molten fluid state while maintaining the temperature of the screw and the extrusion die at 80, cooled, and cooled to a diameter of 17 mm and a length of 90 mm.
  • Test example in which an unhydrated molded body of a hydraulic composition as a crack filler was produced by molding into an elongated cylindrical shape of mm, just like a chalk.
  • a mock test specimen modeled on a concrete detached house concrete foundation with a total length of 15 m, a height of 45 cm and a thickness of 10 cm was made using concrete containing excess inflation material. Cracking was intentionally caused by casting and restraining the bottom surface with a reinforcing bar. Crack width 0.3 to: 1.0 mm cracks were generated at a total of 38 locations at intervals of approximately 30 cm. Most of these cracks Penetration cracks were found in both the height and thickness directions.
  • the specimen with such a penetration crack was used as the test object.
  • the tip of the chalk-shaped crack repair material obtained in Example 1 was softened by immersing it in water for 5 to 30 seconds, and the softened chalk-shaped crack filler was removed from the remaining material. Cracks 15 Rubbed along 5 locations to fill and repair cracks.
  • the repair method can be remarkably simplified, and a commercially available ultrafine particle cement-based crack is provided. It can be seen that the same anti-cracking effect of the rebar as the repair material can be provided.
  • the cracks to be tested are concrete cracks whose width is 0.1, 0.3, 0.5, 0.9, 1.3 mm measured with a crack gauge. It is. For each of these cracks, the average depth of filling was measured by rubbing each of the chalk-shaped compacts and rubbing them 5 times while “sharpening” them.
  • the filled depth is defined as the part that has been repaired after water is supplied to the cracked filler powder filled with a spray or wet cloth after being rubbed in and then cured.
  • the packed section was broken to allow observation, and the filling, that is, the repaired depth was measured with a vernier caliper, and the average value was determined.
  • the cracks to be tested are concrete cracks.
  • the time required to repair 10 cracks with a large crack width of 2 mm and a length of 15 cm and the time required per crack were measured.
  • the repair time is the sum of the time required for performing the work up to a state where it is judged that the restoration of the aesthetic appearance and the waterproof performance are satisfactory, for a total of 10 pieces.
  • this time does not include the time required to provide moisture and to harden each hydraulic composition.
  • the partially hydrated crack repair material of the present invention is 3.5 times as large as the crack filler of Comparative Example 4 in repairing relatively small cracks having a crack width of about 0.1 to 0.3 mm, and has a crack width of 3.5 times. It can be seen that the work efficiency has been improved up to 2.6 times in repairing thick cracks of 0.5 to 1.2 mm.
  • Example 2 The same procedure as in Example 1 was repeated except that the water-stopping material in Example 1 was replaced with static crushed material powder (trade name: S-Might VB, manufactured by Sumitomo Osaka Cement Co., Ltd.). A mixture was obtained. The mixture was charged into an extruder in the same manner as in Example 1, and extruded into a cylindrical shape having a diameter of 4 Omm and a length of 50 Omm by extrusion. A partially hydrated molded product of the hydraulic composition as a crushed material was produced.
  • static crushed material powder trade name: S-Might VB, manufactured by Sumitomo Osaka Cement Co., Ltd.
  • the obtained partially hydrated molded product had a loss on ignition value (Idanishion loss) of 17% by weight as specified in “Ice loss on ignition of cement” in JIS522. Comparative Example 5
  • Example 2 Next, the static crushed material obtained in Example 2 was filled in the holes of the concrete test object. The filling was very easy and delicate.
  • Example 2 the homogeneous mixture obtained in the same manner as in Example 1 was formed into a hollow cylinder having an outer diameter of 49.9 mm and an inner diameter of 2 mm by extrusion. This was inserted and loaded into the steel pipe, and then water for hydration reaction was injected into a 2 mm inner diameter hole.
  • Table 5 shows that the crushing by the partially hydrated static crushing material of the present invention can be performed with a remarkably simple crushing method and can be crushed almost in the same manner as a conventional product.
  • the mixing ratio of the hydraulic composition to the initially added water required to maintain the original shape was 80:20 parts by weight, and the obtained mixture was put into an extruder. And extruded into a cylinder having a diameter of 17 mm, and cut into a predetermined length of 120 mm. This partially hydrated molded body was left to cure for 7 hours at a humidity of 54% and 23 to form a rod-shaped molded body sufficient to maintain its original shape.
  • the rod-shaped compact was stored in a dryer held at 250 for 5 hours, and water not consumed in the hydration reaction at this time, that is, free water, was forcibly evaporated and removed.
  • Hydration hardening was forcibly stopped in a hydration reaction state of about 7 hours of age, a partially hydrated molded body was obtained, and a hole-in-anchor backfill material was manufactured.
  • the obtained partially hydrated molded product had a loss on ignition value (Idanishon loss) defined in “Ice loss on ignition of cement” in JIS5222 of 22% by weight. Comparative Example 6
  • the size of one hole after extracting many anchors had a cylindrical shape with a diameter of 17 mm and a depth of 120 mm. Hammering the hole-in-anchor backfill material obtained in the above Example 3 into the anchor trace of the concrete having a large number of anchor traces having such a shape, By supplying 30% by weight of water to the filled hole anchor / backfill material, the filled hole anchor / backfill material is cured, and the anchor mark backfill operation is performed. Completed. On the other hand, the mortar backfill material of Comparative Example 6 was manually backfilled on each of the anchor marks.
  • Table 6 shows the work efficiency of both cases.
  • Example 2 The same as in Example 1 except that the hydraulic composition used was a water-stopping material (trade name: Lioncis 101, manufactured by Sumitomo Osaka Cement Co., Ltd.) made of ultra-hard cement. According to the method, water was mixed in the mixing ratio shown in Table 7 to produce a partially hydrated molded product.
  • a water-stopping material trade name: Lioncis 101, manufactured by Sumitomo Osaka Cement Co., Ltd.
  • the loss on ignition value (Idanishyon) of each obtained partially hydrated molded product specified in “Loss on ignition of cement” in JISR 5202 (Loss) was 6% by weight, 17% by weight and 22% by weight, respectively.
  • Example 4 to 6 and Comparative Example 7 were mixed with kneading water in the amounts shown in Table 8 and charged into a mixer, and kneaded uniformly to prepare a fresh mortar. A test specimen of 50 mm X 100 mm was obtained, and was cured in air until a predetermined age shown in Table 8, and the compressive strength of each test specimen was measured.
  • the mortar product of the present invention had a specific strength of 90% of that of the conventional mortar premix product at a short-time strength of 3 hours at an age of 3 hours. It can be seen that the strength changes and the strength is almost the same. In addition, it can be seen that even at the long-term age of 91 days, stable strength elongation and maintenance are shown.
  • the partially hydrated molded article of the present invention has good shape maintainability, can be easily disintegrated at the time of use, is excellent in environmental friendliness, and requires special tools and techniques. For example, many people It can be easily applied to filling and repairing cracks as a concrete crack filler. In addition, it can be used for various applications such as static crushing materials, various mortar premix products, various concrete premix products, various filling materials and backfilling materials.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

L'invention concerne un article formé partiellement hydrolysé obtenu à partir d'une composition hydraulique, se caractérisant par le fait qu'il contient une partie non hydrolysée et conserve une activité d'hydrolyse, la composition hydraulique étant partiellement hydrolysée jusqu'à un point où la forme peut être maintenue. L'invention concerne également un procédé destiné à la production de cet article, ainsi qu'un procédé d'utilisation de cet article. Cet article formé partiellement hydrolysé peut être davantage hydrolysé et durci par addition d'eau jusqu'à un point où il présente les mêmes caractéristiques de performance que celles d'un article conventionnel hydrolysé et durci, l'article étant destiné à diverses applications. L'article formé partiellement hydrolysé permet d'éviter que de la poussière d'une composition hydraulique ne soit produite durant la distribution et l'utilisation de la composition et permet un stockage à long terme et une simplification de la forme d'utilisation de la composition.
PCT/JP2004/005558 2003-09-11 2004-04-19 Article forme partiellement hydrolyse obtenu a partir d'une composition hydraulique, son procede de production et son procede d'utilisation WO2005026073A1 (fr)

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JP2003320208A JP3678732B2 (ja) 2003-09-11 2003-09-11 水硬性組成物の部分水和成形体、その製造方法およびその利用方法

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JP5169368B2 (ja) * 2008-03-25 2013-03-27 住友大阪セメント株式会社 自己治癒性水和硬化物及び低反応活性セメント材料
JP5278265B2 (ja) * 2009-09-18 2013-09-04 住友大阪セメント株式会社 自己修復コンクリート混和材、その製造方法及び該混和材を用いた自己修復コンクリート材料
KR101545635B1 (ko) * 2013-10-25 2015-08-19 주식회사 휴리스 방수용 몰탈 조성물 및 그 제조방법
JP6358139B2 (ja) * 2015-03-24 2018-07-18 住友大阪セメント株式会社 無機系アンカー材料及び該アンカー材料を用いたアンカー筋の定着方法
JP6792430B2 (ja) * 2016-11-28 2020-11-25 前田建設工業株式会社 ３ｄプリント技術を用いた建設構造物の構築装置
CN112592107B (zh) * 2019-11-29 2021-11-02 中国建筑标准设计研究院有限公司 可再溶散的砂浆固结体及其制备方法以及砂浆产品和应用
JP7122792B1 (ja) * 2022-06-07 2022-08-22 株式会社石橋建築研究所 防水用混和材

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JPS62236884A (ja) * 1986-04-08 1987-10-16 Shimizu Constr Co Ltd コンクリート構造物の止水方法
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JP2003246652A (ja) * 2002-02-25 2003-09-02 Uchiyama Advance:Kk まだ固まらない水和系混合物の真空凍結乾燥による保存方法及び多目的再使用方法
JP2003291131A (ja) * 2002-03-29 2003-10-14 Uchiyama Advance:Kk まだ固まらない水和系混合物の高温乾燥による混合物構成材の分離収集方法

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JPS62162506A (ja) * 1985-11-08 1987-07-18 サンド・アクチエンゲゼルシヤフト 水硬性結合剤及びセメント質混合物製造方法
JPS62236884A (ja) * 1986-04-08 1987-10-16 Shimizu Constr Co Ltd コンクリート構造物の止水方法
JPH0354137A (ja) * 1989-07-21 1991-03-08 Toda Constr Co Ltd 解体コンクリートの再利用方法
JPH041366A (ja) * 1990-04-18 1992-01-06 Nitto Chem Ind Co Ltd 複合式裏込め注入止水工法
JPH05238794A (ja) * 1992-02-29 1993-09-17 Sumitomo Cement Co Ltd セメントの硬化促進組成物およびその製造方法
JPH0986983A (ja) * 1995-09-29 1997-03-31 Shimizu Corp ひびわれ自己修復性水和硬化物及びそのひびわれ補修方法
JP2003246652A (ja) * 2002-02-25 2003-09-02 Uchiyama Advance:Kk まだ固まらない水和系混合物の真空凍結乾燥による保存方法及び多目的再使用方法
JP2003291131A (ja) * 2002-03-29 2003-10-14 Uchiyama Advance:Kk まだ固まらない水和系混合物の高温乾燥による混合物構成材の分離収集方法

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KR100860451B1 (ko) 2008-09-25
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KR20050026977A (ko) 2005-03-17
CN1594172A (zh) 2005-03-16
CN100395205C (zh) 2008-06-18

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