WO2020026766A1 - Procédé de production de corps en masse de verre - Google Patents

Procédé de production de corps en masse de verre Download PDF

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Publication number
WO2020026766A1
WO2020026766A1 PCT/JP2019/027715 JP2019027715W WO2020026766A1 WO 2020026766 A1 WO2020026766 A1 WO 2020026766A1 JP 2019027715 W JP2019027715 W JP 2019027715W WO 2020026766 A1 WO2020026766 A1 WO 2020026766A1
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Prior art keywords
glass
laser
bulk body
glass layer
concrete
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PCT/JP2019/027715
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English (en)
Japanese (ja)
Inventor
秀 阪口
川人　洋介
由弦 山本
修 桑野
公則 和鹿
達己 川渕
Original Assignee
国立研究開発法人海洋研究開発機構
株式会社ヒロテック
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Application filed by 国立研究開発法人海洋研究開発機構, 株式会社ヒロテック filed Critical 国立研究開発法人海洋研究開発機構
Priority to JP2020533389A priority Critical patent/JP7279883B2/ja
Publication of WO2020026766A1 publication Critical patent/WO2020026766A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • B23K26/354—Working by laser beam, e.g. welding, cutting or boring for surface treatment by melting
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
    • C04B41/61—Coating or impregnation
    • C04B41/65—Coating or impregnation with inorganic materials
    • C04B41/68—Silicic acid; Silicates
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/04—Treating liquids
    • G21F9/06—Processing
    • G21F9/16—Processing by fixation in stable solid media

Definitions

  • the present invention relates to a method for producing a glass bulk body, and more specifically, to a method for producing a glass bulk body capable of vitrifying an arbitrary region on the surface of aggregates of rock, rock or concrete.
  • laser processing can be basically performed without noise and without vibration, and attention has been paid not only to processing and welding of metal materials, but also to processing of concrete materials. A survey has been started on the applicability of this.
  • Patent Document 1 JP-A-6-80485
  • a surface adhering material mainly composed of an inorganic substance is arranged on the surface of a building material base material, and the surface layer is melted by irradiating a laser.
  • a surface treatment method for obtaining a building material on which a strong film is formed has been proposed.
  • a hardened cured film can be formed because both the building material base material and the surface adhering material are melted, and a colored cured film is formed on the surface of the construction material. It can be easily formed, and the surface of the construction material can be provided with heat insulation and sound insulation effects.
  • Patent Document 2 Japanese Patent Application Laid-Open No. H11-19785
  • a method of perforating a hardened cement body characterized in that perforation is performed by the method.
  • a low-noise, low-vibration apparatus is used to form a fragile layer having sufficiently reduced strength on the hardened cement body to be pierced, and then to form the fragile layer.
  • the fragile layer can be removed using a slow rotating mechanical or manual tool. As a result, generation of vibration and noise during drilling can be suppressed as much as possible, and the working environment and surrounding environment during drilling can be improved.
  • the construction material and the surface treatment method described in Patent Document 1 described above require the use of a surface-adhering material mainly composed of an inorganic substance whose components are adjusted for laser irradiation.
  • the surface adhering material is melted by irradiation, and is coated on the surface of the building material base material.
  • the surface treatment method described in Patent Document 1 is a method of coating an inorganic substance using laser irradiation, and uses a silica (SiO 2 ) component contained in an aggregate of sand particles, rock or concrete as a raw material, This is completely different from the method for manufacturing a glass bulk body in which a glass layer is formed in the region.
  • the method for perforating a hardened cement body described in Patent Document 2 is to form a fragile layer in the hardened cement body by using laser irradiation, and to form a dense glass layer in which formation of defects and the like is suppressed.
  • This is a technique having a direction completely opposite to that of the method of forming a region.
  • the formation of the fragile layer is limited to a narrow region corresponding to the perforated region, and it is not necessary to form the fragile layer continuously. That is, in the known prior art, a silica (SiO 2 ) component contained in an aggregate of sand grains, rock or concrete is used as a raw material, and a dense glass layer is continuously formed in an arbitrary area (particularly in a wide area). There is no way to do this.
  • an object of the present invention is to irradiate a laser to an aggregate of sand particles, rock or concrete, and use silica (SiO 2) contained in the aggregate of these sand particles, rock or concrete. It is an object of the present invention to provide a simple method for producing a glass bulk body in which a dense glass layer is continuously formed in an arbitrary region (particularly in a wide region) using a component as a raw material. Another object of the present invention is to provide a glass bulk body in which the surface of a substrate made of an aggregate of sand grains, rock or concrete is vitrified, and a glass layer is continuously formed in an arbitrary region.
  • the present inventor has conducted intensive studies on a laser irradiation method capable of forming a dense glass layer continuously and over a wide area in order to achieve the above object. After the formation of, the present inventors have found that it is extremely important to continuously expand the melted portion by laser scanning, and have reached the present invention.
  • the present invention An aggregate of sand grains, a method for producing a glass bulk body for vitrifying the surface of rock or concrete,
  • the aggregate of sand grains, the rock and the concrete include a silica (SiO 2 ) component, A first step of irradiating the surface with a laser at a fixed point and forming a fused portion, The second step of moving the irradiation position of the laser at a scanning speed at which the melting portion continuously expands, and forming a glass layer, Performing the first step and the second step continuously,
  • a method for producing a glass bulk body characterized in that:
  • a molten portion serving as a seed of a glass layer can be formed.
  • the melted portion can be expanded.
  • the scanning speed is too fast, the melted portion is divided or narrowed, and a dense glass layer cannot be formed continuously.
  • dense silica (SiO 2 ) components required for forming the glass layer steam explosion, aggregates of sand particles serving as a base material, changes in the shape of rock or concrete, and the like will cause a dense structure.
  • the glass layer cannot be formed continuously.
  • a powder containing a silica (SiO 2 ) component is disposed on the surface as the preliminary treatment step of the first step.
  • the pretreatment step, the first step, and the second step are performed on the glass layer to increase the thickness of the glass layer.
  • the glass layer can be formed by performing the first step and the second step once, respectively. However, by supplying the silica (SiO 2 ) component again by powder and performing the first step and the second step, the glass layer can be formed. The thickness and area of the layer can be increased.
  • the processing is not limited to one time, and a glass layer having an arbitrary thickness and area can be formed by repeating the processing a plurality of times as necessary.
  • the powder is supplied to the melting portion.
  • a powder containing a silica (SiO 2 ) component to the fusion zone in the second step, a dense glass layer can be formed more stably and efficiently.
  • the method of supplying the powder is not particularly limited, and may be supplied by various conventionally known methods. For example, it is possible to use a powder supply method used in laser cladding (a nozzle for supplying powder near the melting portion, a nozzle for supplying powder coaxially with laser irradiation, and the like).
  • the power density of the laser on the surface is 3 to 15 W / mm 2 .
  • the silica (SiO 2 ) component and the like contained in the base material can be sufficiently melted to form a seed region of the glass layer.
  • the power density of the laser on the surface be 20 to 40 W / mm 2 .
  • the power density of the laser is set to 20 W / mm 2 or more, the molten state can be sufficiently maintained even when the irradiation position of the laser is moved, and the molten portion can be continuously enlarged.
  • the wattage to 40 W / mm 2 or less it is possible to suppress evaporation of the silica (SiO 2 ) component, steam explosion, deformation of the base material, and the like.
  • the scanning speed is 0.01 to 2.0 m / min.
  • the scanning speed of the laser it is preferable that in the second step, the scanning speed is 0.01 to 2.0 m / min.
  • the scanning speed of the laser it is preferable that in the second step, the scanning speed is 0.01 to 2.0 m / min.
  • the scanning speed of the laser it is preferable that in the second step, the scanning speed is 0.01 to 2.0 m / min.
  • the scanning speed of the laser is 0.01 m / min or more, evaporation of a silica (SiO 2 ) component, steam explosion, deformation of a substrate, and the like can be suppressed.
  • the irradiation speed is 2.0 m / min or less, the molten state can be sufficiently maintained even when the irradiation position of the laser is moved, and the molten portion can be continuously enlarged.
  • the aggregate of sand and / or the rock is present at an outer edge of an excavation area when excavating the ground or the seabed.
  • the outer edge of the excavation area collapses with the excavation.
  • excavation is carried out using a casing.
  • a stratum eg, an oil field stratum
  • the casing easily collapses, and there are cases where a casing cannot be formed.
  • vitrifying the easily collapsed region the inner diameter becomes constant, and the casing can be easily installed.
  • the inner diameter becomes smaller as the excavation depth increases. Disappears.
  • high-level radioactive waste is introduced into the melting portion.
  • high-level radioactive waste is enclosed in a stainless steel container together with molten glass to form a vitrified material, and the container is buried in an underground facility.
  • large burial sites are required.
  • incorporation of high-level radioactive waste into the melting portion makes it possible to extremely easily form a vitrified body, and a large-sized stainless steel container is not required.
  • the vitrified body can be formed deep underground, and a large-scale burial site is not required.
  • the powder is disposed in a groove of a concrete member, and the groove is filled with the glass layer.
  • the groove of the concrete member By filling the groove of the concrete member with the glass layer, it is possible to improve the corrosion resistance, aesthetic appearance, and the like of the concrete member.
  • these concrete members can be joined via the glass layer by filling the groove with a glass layer. Simple joining can also be achieved by butting concrete members together and forming a glass layer along the joining line.
  • the present invention An aggregate of sand grains, a base material made of rock or concrete, And a glass layer, The base member and the glass layer are continuously integrated via a boundary region having bubbles,
  • the present invention also provides a glass bulk body characterized in that:
  • a glass layer is formed from a silica (SiO 2 ) component contained in a base material portion made of an aggregate of sand grains, rock or concrete, and therefore, the base material portion and the dense glass layer are formed. Are continuously integrated.
  • bubbles are present in the boundary region between the base material portion and the glass layer, and the difference in physical properties between the base material portion and the glass layer is effectively reduced by the bubbles.
  • the glass layer has transparency. Since the glass layer formed in the glass bulk body of the present invention is dense and the glass layer has transparency, for example, a building member (external wall or the like) having an excellent appearance utilizing light transmission ). In addition, the glass bulk body of this invention can be suitably obtained by the manufacturing method of the glass bulk body of this invention.
  • an aggregate of sand particles, rock or concrete is irradiated with a laser, and a silica (SiO 2 ) component contained in the aggregate of sand particles, rock or concrete is used as a raw material.
  • a silica (SiO 2 ) component contained in the aggregate of sand particles, rock or concrete is used as a raw material.
  • an aggregate of sand particles, a surface of a base material made of rock or concrete is vitrified, and a glass bulk body in which a dense glass layer is continuously formed in an arbitrary region. Can be provided.
  • FIG. 2 is a cross-sectional view of a sample obtained in Example 1.
  • 3 is a photograph showing a state in which light passes through the glass layer formed in Example 1.
  • 6 is an external appearance photograph of a sample obtained in Example 2.
  • 4 is a photograph of the appearance of a sample obtained in Example 3. It is a photograph of the appearance of the concrete piece in which the groove used in Example 4 was formed. It is an enlarged photograph of the groove formed in the concrete piece. It is an appearance photograph of a groove filled with powder. It is an external appearance photograph which shows the state which vitrified the powder.
  • 14 is an appearance photograph of a processing region finally obtained in Example 4.
  • 9 is a photograph of the appearance of a concrete joint obtained in Example 5.
  • the method for producing a glass bulk body of the present invention is a method for producing a glass bulk body for vitrifying a surface of an aggregate of sand particles, rock or concrete, and includes a method of irradiating a fixed point with a laser. It has one step and a second step of scanning with a laser.
  • a method for producing a glass bulk body for vitrifying a surface of an aggregate of sand particles, rock or concrete includes a method of irradiating a fixed point with a laser. It has one step and a second step of scanning with a laser.
  • each step and the like will be described in detail.
  • the first process (fixed point irradiation of laser)
  • the first step is a step for irradiating a surface of an aggregate of sand particles, rock or concrete with a laser at a fixed point to form a seed (melted portion) which will later become a glass layer.
  • the aggregate of sand grains, rock, or concrete serving as the base material on which the glass layer is formed contains a silica (SiO 2 ) component, and the silica (SiO 2 ) component becomes the glass layer.
  • the “aggregate of sand grains” means a broad aggregate of sand grains, and includes, for example, a solidified body of sand aggregates by applying pressure, and sand grains existing on the ground or the seabed.
  • the aggregate of sand grains, rock or concrete is not particularly limited as long as it contains a silica (SiO 2 ) component, and conventionally known aggregates of various sand grains, rocks or concrete can be used.
  • silica sand, masago, or the like can be used for the sand particles, and granite, sandstone, mudstone, tuff, or the like can be used for the rock.
  • chimney which is a structure formed by depositing and precipitating metal contained in hot water ejected from the sea floor, can also be targeted.
  • the type of laser used for irradiation is not particularly limited as long as the silica (SiO 2 ) component contained in the aggregate of sand particles, rocks or concrete can be sufficiently melted, and various conventionally known lasers may be used. Can be.
  • a laser that can be preferably used a semiconductor-excited solid-state laser can be given, and for example, a semiconductor laser can be used.
  • the power density of the laser on the surface of the base material is preferably 3 to 15 W / mm 2 .
  • the silica (SiO 2 ) component and the like contained in the base material can be sufficiently melted to form a seed region of the glass layer.
  • the power density of the laser is more preferably 5 to 10 W / mm 2 .
  • a powder containing a silica (SiO 2 ) component on the surface of the base material.
  • the silica (SiO 2 ) component By supplying the silica (SiO 2 ) component from the powder in addition to the silica (SiO 2 ) component contained in the base material, the glass layer can be formed more stably and efficiently.
  • the powder is not particularly limited as long as it contains a silica (SiO 2 ) component.
  • glass powder, silica particles, silica sand, masago, and the like can be used. Is also good.
  • the method of the arrangement is not particularly limited.For example, after arranging an appropriate amount of powder in a laser irradiation region, the powder is knife-edged. And the like.
  • the second step is a step for scanning the laser continuously from the fixed point irradiation of the laser in the first step to enlarge the molten portion (the seed region of the glass layer).
  • the power density of the laser on the surface of the base material is preferably set to 20 to 40 W / mm 2 .
  • the power density of the laser is set to 20 W / mm 2 or more, the molten state can be sufficiently maintained even when the irradiation position of the laser is moved, and the molten portion can be continuously enlarged.
  • the wattage to 40 W / mm 2 or less, it is possible to suppress evaporation of the silica (SiO 2 ) component, steam explosion, deformation of the base material, and the like.
  • the more preferable power density of the laser is 25 to 35 W / mm 2 .
  • the scanning speed of the laser is preferably 0.01 to 2.0 m / min.
  • the scanning speed of the laser is preferably 0.01 m / min or more.
  • evaporation of a silica (SiO 2 ) component can be suppressed.
  • the irradiation speed is 2.0 m / min or less, the molten state can be sufficiently maintained even when the irradiation position of the laser is moved, and the molten portion can be continuously enlarged.
  • a more preferable laser scanning speed is 0.1 to 1.0 m / min.
  • the second step it is preferable to supply a powder containing the above-mentioned silica (SiO 2 ) component to the melting part.
  • a powder containing a silica (SiO 2 ) component By supplying a powder containing a silica (SiO 2 ) component to the fusion zone in the second step, a dense glass layer can be formed more stably and efficiently.
  • the method of supplying the powder is not particularly limited, and may be supplied by various conventionally known methods. For example, it is possible to use a powder supply method used in laser cladding (a nozzle for supplying powder near the melting portion, a nozzle for supplying powder coaxially with laser irradiation, and the like).
  • the thickness of the glass layer can be increased.
  • the glass layer can be formed by performing the first step and the second step once, respectively. However, by supplying the silica (SiO 2 ) component again by powder and performing the first step and the second step, the glass layer can be formed. The thickness and area of the layer can be increased.
  • the processing is not limited to one time, and a glass layer having an arbitrary thickness and area can be formed by repeating the processing a plurality of times as necessary.
  • the atmosphere in the laser irradiation region is not particularly limited in both the first step and the second step, and can be performed, for example, in the air or in an inert gas atmosphere.
  • the manufacturing method of the glass bulk body of the present invention is not only capable of forming a dense glass layer on an aggregate of sand particles, an arbitrary region of the surface of rock or concrete, but also various methods. There are effective applications of.
  • vitrified waste containing high-level radioactive waste not only eliminates the need for large-scale production equipment, but also enables the use of a minimum number of burial sites. High-level radioactive waste can be reduced very effectively.
  • the timing of taking the high-level radioactive waste into the glass layer and the like are not particularly limited, for example, when arranging the powder on the surface of the substrate as a preliminary treatment of the first step, between the powder and the substrate By arranging the high-level radioactive waste and then performing the first step and the second step, the high-level radioactive waste can be incorporated into the glass layer.
  • a high-level radioactive substance may be supplied at the same time.
  • a concrete member can be repaired and / or reinforced by placing a powder containing a silica (SiO 2 ) component in a groove of the concrete member and filling the groove with a glass layer.
  • the groove may be intentionally formed, or a crack or the like which has occurred naturally may be used as the groove.
  • the formation of the glass layer not only improves the mechanical properties and corrosion resistance, but also improves the appearance.
  • a groove when a groove is present between two or more concrete members, by forming a glass layer in the groove, these concrete members can be joined via the glass layer. Furthermore, simple joining can also be achieved by butting concrete members and forming a glass layer along the butting line.
  • FIG. 1 shows a schematic cross-sectional view of the glass bulk body of the present invention.
  • the glass bulk body 2 has a base portion 4 made of an aggregate of sand grains, rock or concrete, and a glass layer 6, and the base portion 4 and the glass layer 6 are interposed via a boundary region having bubbles 8. Continuously integrated.
  • the base member 4 is made of an aggregate of sand grains, rock or concrete, and contains a silica (SiO 2 ) component.
  • the aggregate of sand grains, rock or concrete is not particularly limited as long as it contains a silica (SiO 2 ) component, and is a conventionally known aggregate of various sand grains, rock or concrete.
  • the sand grains are quartz sand or masago, and the rocks are granite, sandstone, mudstone, tuff, and the like.
  • concrete contains silica sand and clay, and these components have silica (SiO 2 ).
  • the size of the bubbles 8 is preferably 50 to 2000 ⁇ m, more preferably 100 to 1500 ⁇ m.
  • the size of the bubble 8 is 50 ⁇ m or more, the difference between the glass layer 6 and the base member 4 can be reduced, and when the size is 2000 ⁇ m or less, embrittlement of the boundary region can be suppressed.
  • the glass layer 6 preferably has transparency. Since the glass layer 6 has transparency, it can be used, for example, as a building member (outer wall or the like) having an excellent appearance utilizing light transmission. In addition, the glass bulk body of this invention can be suitably obtained by the manufacturing method of the glass bulk body of this invention.
  • Example 1 Laser irradiation was performed on the surface of the sandstone using a semiconductor laser manufactured by Laser Line. Specifically, the laser output was 800 W, the laser beam diameter on the surface of the sandstone was 2 ⁇ 39 mm, and fixed-point irradiation was performed for 60 seconds (first step). The laser power density in the first step is 10 W / mm 2 .
  • FIG. 2 shows a cross-sectional photograph of the sandstone after the treatment.
  • a dense glass layer is formed in a wide area in the surface region of the sandstone. Further, the glass layer is formed continuously from sandstone as a base material, and bubbles are formed at the boundary between the glass layer and the base material.
  • the cracks generated in the sandstone were mainly generated during the preparation of the cross-sectional sample.
  • FIG. 3 shows a state in which the obtained glass layer is separated and light is irradiated from the back surface. Light emitted from the back surface has transmitted through the glass layer, and it can be confirmed that the formed glass layer has transparency.
  • Example 2 Laser irradiation was performed on the surface of the tuff using a semiconductor laser manufactured by Laser Line. Specifically, the laser output was 800 W, the laser beam diameter on the surface of the tuff was 2 ⁇ 39 mm, and fixed-point irradiation was performed for 60 seconds (first step). The laser power density in the first step is 10 W / mm 2 .
  • the laser output was increased to 2800 W, and the laser irradiation position was moved at a moving speed of 48 mm / min (second step).
  • the laser power density in the second step is 35 W / mm 2 .
  • FIG. 4 shows a photograph of the appearance of the tuff after the treatment.
  • a dense and bulky glass body having transparency is formed in a wide area in the surface region of the tuff. Further, the glass bulk body is formed continuously from the tuff as the base material, and no defect such as a crack is recognized at the boundary between the glass bulk body and the base material.
  • Example 3 The surface of the concrete was irradiated with laser using a semiconductor laser manufactured by Laser Line. Specifically, the laser output was 2800 W, the laser beam diameter on the concrete surface was 2 ⁇ 39 mm, and fixed-point irradiation was performed for 1 second (first step). The laser power density in the first step is 35 W / mm 2 .
  • the laser irradiation position was moved at a moving speed of 48 mm / min (second step). In this embodiment, the laser output in the second step is not increased from that in the first step.
  • Example 3 An appearance photograph of the obtained sample is shown in FIG. In Example 3, it can be seen that the black glass layer is formed in a wide area.
  • Example 4 An attempt was made to fill a groove (depth: 20 mm, length: 100 mm) formed on the concrete surface with a glass layer using a semiconductor laser manufactured by Laser Line.
  • FIG. 6 shows a photograph of the appearance of a concrete piece having a groove.
  • FIG. 7 shows an enlarged photograph of the groove.
  • the first layer directly irradiates a laser to the bottom of the groove to form a glass layer
  • the second to fifth layers fill the groove with sand-like powder obtained by pulverizing silica sand, and apply laser to the area.
  • To form a glass layer sequentially.
  • the laser output was set to 540 W, the laser beam diameter at the bottom of the groove was set to 2 ⁇ 27 mm, and fixed-point irradiation was performed for 1 second (first step).
  • the laser power density in the first step is 10 W / mm 2 .
  • the laser output was set to 1900 W and the laser was scanned at a speed of 48 mm / min.
  • the laser power density in the second step is 35 W / mm 2 .
  • sandy powder obtained by pulverizing silica sand was supplied to the melting portion, the laser output was set to 1900 W, and laser scanning was performed at a speed of 48 mm / min.
  • the laser power density in this step is 35 W / mm 2 .
  • FIGS. 8 and 9 show an external appearance photograph of the groove filled with the powder and an external appearance photograph after vitrifying the region. It can be seen that the filled powder (silica sand powder) is turned into a dense glass by laser irradiation.
  • FIG. 10 shows an enlarged photograph of the groove of the sample finally obtained. It can be seen that the grooves are completely filled with the dense glass layer, and even the deep grooves can be filled up to the surface by the multilayer glass layer.
  • Example 5 The joining of concrete pieces was attempted using a semiconductor laser manufactured by Laser Line. The concrete pieces were brought into contact with each other at the end face, and the outer peripheral area of the end face was joined by vitrification. Here, a powder having a height of about 3 mm to 5 mm was supplied to the laser irradiation surface, and a sand-like powder obtained by pulverizing sandstone was used as the powder.
  • the laser output was 1900 W
  • the laser beam diameter on the concrete surface was 2 ⁇ 27 mm
  • fixed-point irradiation was performed for 1 second (first step).
  • the laser power density in the first step is 35 W / mm 2 .
  • the laser irradiation position was moved at a speed of 48 mm / min along the outer peripheral area of the end face (second step). In this embodiment, the laser output in the second step is not increased from that in the first step.
  • FIG. 11 shows an external appearance photograph of the sample after irradiating the outer peripheral region of the end face with the laser for two rounds. It can be confirmed that the outer peripheral area of the butted end face is vitrified, and two concrete pieces are joined.

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  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

L'invention concerne un procédé de production simple d'un corps en masse de verre, comprenant l'irradiation d'un agrégat de granulés de sable, d'une roche ou d'un béton au laser pour former une couche de verre dense de manière contiguë dans une région arbitraire à l'aide d'un constituant de silice (SiO2) contenu dans l'agrégat de granulés de sable, la roche ou le béton en tant que matière première. L'invention concerne également un corps en masse de verre dans lequel la surface d'un matériau de base composé d'un agrégat de granulés de sable, d'une roche ou d'un béton est vitrifiée et une couche de verre est formée de manière contiguë dans une région arbitraire. L'invention concerne également un procédé de production d'un corps en masse de verre par vitrification de la surface d'un agrégat de granulés de sable, d'une roche ou d'un béton, le procédé étant caractérisé en ce qu'il comprend une première étape de réalisation de l'irradiation ponctuelle fixe de la surface avec un laser pour former une partie fondue, chacun de l'agrégat de granulés de sable, de la roche et du béton contenant un constituant de silice (SiO2), et une seconde étape de décalage de la position de l'irradiation avec le laser à une vitesse de balayage telle que la partie fondue peut être agrandie de façon continue pour former une couche de verre, la première étape et la seconde étape étant réalisées de manière séquentielle.
PCT/JP2019/027715 2018-07-31 2019-07-12 Procédé de production de corps en masse de verre WO2020026766A1 (fr)

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JPS63100085A (ja) * 1986-10-16 1988-05-02 株式会社イナックス 長寸法の施釉プレストレスコンクリ−ト材および製法
JPH03174376A (ja) * 1989-09-04 1991-07-29 Taisei Corp 石材やコンクリート製材の表面溶融硬化処理法と表面溶融硬化処理した建築用材
JPH10507275A (ja) * 1995-07-26 1998-07-14 ブリティッシュ・ニュークリア・フューエルズ・パブリック・リミテッド・カンパニー 廃棄物処理方法および同処理装置
JP2017141581A (ja) * 2016-02-09 2017-08-17 前田建設工業株式会社 トンネルの構築方法およびトンネル掘削機

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JPS60161318A (ja) * 1984-01-30 1985-08-23 Hitachi Chem Co Ltd 溶融アモルフアスシリカの製造方法および装置
JPS61121113A (ja) * 1984-11-19 1986-06-09 Hitachi Ltd 自動分析装置の位置制御機構
JP2012500350A (ja) * 2008-08-20 2012-01-05 フォロ エナジー インコーポレーティッド 高出力レーザーを使用してボーリング孔を前進させる方法及び設備
WO2011077559A1 (fr) * 2009-12-25 2011-06-30 日本海洋掘削株式会社 Procédé de travail de la roche au moyen d'un laser, et dispositif associé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63100085A (ja) * 1986-10-16 1988-05-02 株式会社イナックス 長寸法の施釉プレストレスコンクリ−ト材および製法
JPH03174376A (ja) * 1989-09-04 1991-07-29 Taisei Corp 石材やコンクリート製材の表面溶融硬化処理法と表面溶融硬化処理した建築用材
JPH10507275A (ja) * 1995-07-26 1998-07-14 ブリティッシュ・ニュークリア・フューエルズ・パブリック・リミテッド・カンパニー 廃棄物処理方法および同処理装置
JP2017141581A (ja) * 2016-02-09 2017-08-17 前田建設工業株式会社 トンネルの構築方法およびトンネル掘削機

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