CN114683532B - In-situ construction method and application of pipeline in cement-based material - Google Patents
In-situ construction method and application of pipeline in cement-based material Download PDFInfo
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- CN114683532B CN114683532B CN202210297422.4A CN202210297422A CN114683532B CN 114683532 B CN114683532 B CN 114683532B CN 202210297422 A CN202210297422 A CN 202210297422A CN 114683532 B CN114683532 B CN 114683532B
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- Prior art keywords
- cement
- ink
- phase
- based material
- pipeline
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- 239000004568 cement Substances 0.000 title claims abstract description 109
- 239000000463 material Substances 0.000 title claims abstract description 90
- 238000010276 construction Methods 0.000 title claims abstract description 19
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 19
- 238000007639 printing Methods 0.000 claims abstract description 60
- 239000002002 slurry Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 83
- 239000000839 emulsion Substances 0.000 claims description 12
- 239000003381 stabilizer Substances 0.000 claims description 10
- 230000007547 defect Effects 0.000 claims description 5
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- 238000010146 3D printing Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
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- 239000012815 thermoplastic material Substances 0.000 description 17
- 230000008859 change Effects 0.000 description 16
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 8
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- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 125000002843 carboxylic acid group Chemical group 0.000 description 6
- KWLMIXQRALPRBC-UHFFFAOYSA-L hectorite Chemical compound [Li+].[OH-].[OH-].[Na+].[Mg+2].O1[Si]2([O-])O[Si]1([O-])O[Si]([O-])(O1)O[Si]1([O-])O2 KWLMIXQRALPRBC-UHFFFAOYSA-L 0.000 description 6
- 230000036571 hydration Effects 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
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- XRWMGCFJVKDVMD-UHFFFAOYSA-M didodecyl(dimethyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCC XRWMGCFJVKDVMD-UHFFFAOYSA-M 0.000 description 4
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 229910000271 hectorite Inorganic materials 0.000 description 4
- 229910010272 inorganic material Inorganic materials 0.000 description 4
- 239000011147 inorganic material Substances 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
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- 239000004094 surface-active agent Substances 0.000 description 4
- 230000009974 thixotropic effect Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical class CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical class OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical class OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical class CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 3
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 3
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000007957 coemulsifier Substances 0.000 description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
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- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 3
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 2
- 239000005639 Lauric acid Substances 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical class CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
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- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 2
- XJWSAJYUBXQQDR-UHFFFAOYSA-M dodecyltrimethylammonium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)C XJWSAJYUBXQQDR-UHFFFAOYSA-M 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
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- 238000007789 sealing Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- OZXSTNYFZIQLOP-UHFFFAOYSA-N styrene;dihydrochloride Chemical compound Cl.Cl.C=CC1=CC=CC=C1 OZXSTNYFZIQLOP-UHFFFAOYSA-N 0.000 description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- SJIXRGNQPBQWMK-UHFFFAOYSA-N 2-(diethylamino)ethyl 2-methylprop-2-enoate Chemical compound CCN(CC)CCOC(=O)C(C)=C SJIXRGNQPBQWMK-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 102000011632 Caseins Human genes 0.000 description 1
- 108010076119 Caseins Proteins 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 102000008192 Lactoglobulins Human genes 0.000 description 1
- 108010060630 Lactoglobulins Proteins 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 238000001484 Pickering emulsion method Methods 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 102000007544 Whey Proteins Human genes 0.000 description 1
- 108010046377 Whey Proteins Proteins 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
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- RZHBMYQXKIDANM-UHFFFAOYSA-N dioctyl butanedioate;sodium Chemical compound [Na].CCCCCCCCOC(=O)CCC(=O)OCCCCCCCC RZHBMYQXKIDANM-UHFFFAOYSA-N 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
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- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
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- 150000002148 esters Chemical class 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- BOUCRWJEKAGKKG-UHFFFAOYSA-N n-[3-(diethylaminomethyl)-4-hydroxyphenyl]acetamide Chemical compound CCN(CC)CC1=CC(NC(C)=O)=CC=C1O BOUCRWJEKAGKKG-UHFFFAOYSA-N 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920000083 poly(allylamine) Polymers 0.000 description 1
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000223 polyglycerol Chemical class 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920002717 polyvinylpyridine Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229940080237 sodium caseinate Drugs 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 229940057950 sodium laureth sulfate Drugs 0.000 description 1
- 229940074404 sodium succinate Drugs 0.000 description 1
- ZDQYSKICYIVCPN-UHFFFAOYSA-L sodium succinate (anhydrous) Chemical compound [Na+].[Na+].[O-]C(=O)CCC([O-])=O ZDQYSKICYIVCPN-UHFFFAOYSA-L 0.000 description 1
- GGHPAKFFUZUEKL-UHFFFAOYSA-M sodium;hexadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCOS([O-])(=O)=O GGHPAKFFUZUEKL-UHFFFAOYSA-M 0.000 description 1
- NWZBFJYXRGSRGD-UHFFFAOYSA-M sodium;octadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCCCOS([O-])(=O)=O NWZBFJYXRGSRGD-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- KYWVDGFGRYJLPE-UHFFFAOYSA-N trimethylazanium;acetate Chemical compound CN(C)C.CC(O)=O KYWVDGFGRYJLPE-UHFFFAOYSA-N 0.000 description 1
- 235000021119 whey protein Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/10—Processes of additive manufacturing
- B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
Abstract
The invention provides an in-situ construction method and application of a pipeline in a cement-based material, and relates to the technical field of 3D printing materials. The invention provides an in-situ construction method of a pipeline in a cement-based material, which comprises the following steps: embedding a printing head of a 3D printer into a cement-based material slurry body, writing ink in the 3D printer into the cement-based material slurry body under the control of a printing program, enabling the cement-based material slurry body to flow after printing and landfill a track left by the movement of the printing head, printing a program-set structure by the ink in the cement-based material slurry body, and after the cement-based material slurry body is solidified, retaining the ink in a cement-based material to form a pipeline or sacrificing the left pipeline according to the self function. The method can be used for in-situ construction of the pipeline in the cement-based material, has good formability, and does not have adverse effect on the cement-based material.
Description
Technical Field
The invention relates to the technical field of 3D printing materials, in particular to an in-situ construction method and application of a pipeline in a cement-based material.
Background
In recent years, the 3D printing technology of cement-based materials has been developed remarkably, and has been used in the construction fields of house buildings, roads and bridges, underground engineering and the like gradually, and has become a key intelligent construction technology for pushing the development of building construction to intelligence, industrialization and informatization. However, the development of 3D printing technology for cement-based materials is still in a preliminary stage, and many problems are needed to be solved. In the layer-by-layer deposition process of the 3D printing, gaps or defects are easily generated between layers, the overall performance of the cement-based material is damaged, and a pipeline with good formability is difficult to obtain inside the cement-based material.
Disclosure of Invention
The invention aims to provide an in-situ construction method and application of a pipeline in a cement-based material. The method can be used for in-situ construction of the pipeline in the cement-based material, has good formability, and does not have adverse effect on the cement-based material.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an in-situ construction method of a pipeline in a cement-based material, which comprises the following steps:
embedding a printing head of a 3D printer into a cement-based material slurry body, writing ink in the 3D printer into the cement-based material slurry body under the control of a printing program, enabling the cement-based material slurry body to flow after printing and landfill a track left by the movement of the printing head, printing a program-set structure by the ink in the cement-based material slurry body, and after the cement-based material slurry body is solidified, retaining the ink in a cement-based material to form a pipeline or sacrificing the left pipeline according to the self function;
the ink comprises thermoplastic materials, solid-liquid phase change materials or multiphase ink; the processing temperature of the thermoplastic material is below 250 ℃; the phase change point of the solid-liquid phase change material is below 120 ℃; the multiphase ink is oil-water two-phase ink or gas-water two-phase ink.
Preferably, the cement-based slurry body has an initial setting time of greater than 10 minutes.
Preferably, the thermoplastic material comprises a thermoplastic polymer; the thermoplastic polymer comprises one or more of polylactic acid, polycaprolactone, polybutylene succinate, nylon, polycarbonate and acrylonitrile-butadiene-styrene copolymer.
Preferably, the thermoplastic material further comprises a filler; the filler comprises an inorganic material or a thermoplastic elastomer.
Preferably, the mass ratio of the filler to the thermoplastic polymer is 0.1-1.0: 1.
preferably, the solid-liquid phase change material comprises a phase change material matrix; the phase change material matrix comprises one or more of methyl palmitate, paraffin phase change materials, octadecane and fatty acid and derivatives thereof.
Preferably, the solid-liquid phase-change material further comprises a nanomaterial; the nano material comprises one or more of nano silicon dioxide, calcium carbonate, graphene oxide, carbon nano tube, montmorillonite, nano titanium dioxide and cellulose nanocrystalline.
Preferably, the mass ratio of the nano material to the phase change material matrix is 0.001-1.0: 1.
preferably, when the ink is a thermoplastic material or a solid-liquid phase material, printing is performed by using a printing head with an annular outlet;
when the ink is a multiphase ink, a printhead with a circular outlet is used for printing.
The invention provides the application of the pipeline obtained by the in-situ construction method in material transmission, wiring or defect stress restoration.
The invention provides an in-situ construction method of a pipeline in a cement-based material, which comprises the following steps: embedding a printing head of a 3D printer into a cement-based material slurry body, writing ink in the 3D printer into the cement-based material slurry body under the control of a printing program, enabling the cement-based material slurry body to flow after printing and landfill a track left by the movement of the printing head, printing a program-set structure by the ink in the cement-based material slurry body, and after the cement-based material slurry body is solidified, retaining the ink in a cement-based material to form a pipeline or sacrificing the left pipeline according to the self function; the ink comprises thermoplastic materials, solid-liquid phase change materials or multiphase ink; the processing temperature of the thermoplastic material is below 250 ℃; the phase change point of the solid-liquid phase change material is below 120 ℃; the multiphase ink is oil-water two-phase ink or gas-water two-phase ink. In the invention, when the ink is a thermoplastic material or a solid-liquid phase material, the ink keeps a flowing state when being extruded from a 3D printer, and is converted into a solid state by means of temperature change after being extruded, and the solid state is fixed in shape and remains in a cement-based material to form a pipeline; when the ink is oil-water two-phase ink, the ink is firstly used as a pipeline template after being molded, water in the oil-water two-phase ink participates in hydration along with solidification and drying of the cement-based material slurry, the ink loses stability to release an oil phase, and the released oil phase is adsorbed by the porous cement-based pipe wall to form a pipeline taking the oil phase material as the pipe wall; when the ink is gas-water two-phase ink, the gas-water two-phase ink keeps flowing state when being extruded from a 3D printer, the formed ink is formed after extrusion, the formed ink is firstly used as a pipeline template, and along with solidification and drying of a cement base material slurry body, water in the gas-water two-phase ink participates in hydration, emulsion loses stability and bubbles are broken, so that a pipeline taking the cement base material as a pipe wall is formed. The method can be used for in-situ construction of the pipeline in the cement-based material, has good formability, and does not have adverse effect on the cement-based material.
Drawings
FIG. 1 is a schematic illustration of buried 3D printing and a prepared pipeline;
FIG. 2 is an X-ray computedtomography (XCT) projection of the hollow tube prepared in example 1;
FIG. 3 is a photograph of XCT reconstruction of a hollow tube prepared in example 2;
FIG. 4 is a schematic illustration of the Zigzag pipeline prepared in example 3 and a graph of the effect of delivering an aqueous reagent;
FIG. 5 is a cross-sectional view of a Zigzag pipeline prepared in example 3.
Detailed Description
The invention provides an in-situ construction method of a pipeline in a cement-based material, which comprises the following steps:
embedding a printing head of a 3D printer into a cement-based material slurry body, writing ink in the 3D printer into the cement-based material slurry body under the control of a printing program, enabling the cement-based material slurry body to flow after printing and landfill a track left by the movement of the printing head, printing a program-set structure by the ink in the cement-based material slurry body, and after the cement-based material slurry body is solidified, retaining the ink in a cement-based material to form a pipeline or sacrificing the left pipeline according to the self function; the ink comprises thermoplastic materials, solid-liquid phase change materials or multiphase ink; the processing temperature of the thermoplastic material is below 250 ℃; the phase change point of the solid-liquid phase change material is below 120 ℃; the multiphase ink comprises oil-water two-phase ink or gas-water two-phase ink.
In the present invention, the initial setting time of the cement-based material slurry is preferably higher than 10 minutes, more preferably 10 to 200 minutes. In the present invention, the cement-based material slurry body has thixotropic properties. In the present invention, the cement-based slurry body preferably includes a silicate cement-based slurry body or a modified composite material slurry body thereof, an aluminate cement-based slurry body or a modified composite material slurry body thereof, a sulphoaluminate cement-based slurry body or a modified composite material slurry body thereof, an aluminoferrite cement-based slurry body or a modified composite material slurry body thereof, a fluorite cement-based slurry body or a modified composite material slurry body thereof, a phosphate cement-based slurry body or a modified composite material slurry body thereof.
In the present invention, the processing temperature of the thermoplastic material is 250 ℃ or less, preferably 25 to 250 ℃. In the present invention, the thermoplastic material preferably includes a thermoplastic polymer; the thermoplastic polymer preferably comprises one or more of polylactic acid (PLA), polycaprolactone (PCL), polybutylene succinate (PBS), nylon, polycarbonate and acrylonitrile-butadiene-styrene copolymer (ABS). In the present invention, the thermoplastic material preferably further comprises a filler; the filler preferably comprises an inorganic material or a thermoplastic elastomer; the inorganic material preferably comprises one or more of talcum powder, nano hydroxyapatite, expanded graphite, nano silicon dioxide, calcium carbonate, graphene oxide, carbon nano tube, montmorillonite, nano titanium dioxide and cellulose nanocrystalline; the minimum dimension of the inorganic material is preferably 0.5 to 200nm. In the present invention, the thermoplastic elastomer preferably includes one or more of thermoplastic polyurethane elastomer (TPU), polycaprolactone (PCL), polybutylene succinate (PBS), and polyvinyl alcohol (PEG).
In the present invention, when the thermoplastic material includes a thermoplastic polymer and a filler, the mass ratio of the filler to the thermoplastic polymer is preferably 0.001 to 1.0:1, more preferably 0.001 to 0.2.
In the present invention, when the ink is a thermoplastic material, printing is preferably performed using a printhead with an annular outlet. In the present invention, the thermoplastic material remains in a fluid state when extruded from a 3D printer, and changes to a solid state by means of temperature change after extrusion, fixing the shape. The invention adopts the printing head with the annular outlet to print, and directly prints the pipeline with the thermoplastic material as the pipe wall.
In the present invention, the phase transition point of the solid-liquid phase transition material is 120 ℃ or less, preferably 25 to 90 ℃. In the present invention, the solid-liquid phase change material preferably includes a phase change material matrix; the phase change material matrix preferably comprises one or more of methyl palmitate, paraffin phase change materials, octadecane and fatty acid and derivatives thereof; the fatty acid preferably comprises lauric acid or stearic acid. In the present invention, the solid-liquid phase-change material preferably further includes a nanomaterial; the nanomaterial preferably comprises one or more of nano silicon dioxide, calcium carbonate, graphene oxide, carbon nano tube, montmorillonite, nano titanium dioxide and cellulose nanocrystalline. In the present invention, the minimum dimension of the nanomaterial is 0.5 to 200nm, and more preferably 1 to 100nm.
In the present invention, when the solid-liquid phase change material includes a phase change material matrix and a nanomaterial, the mass ratio of the nanomaterial to the phase change material matrix is preferably 0.001 to 1.0:1, more preferably 0.001 to 0.2:1.
in the present invention, when the ink is a solid-liquid phase-change material, printing is preferably performed using a printhead with an annular outlet. In the invention, the solid-liquid phase change material keeps a flowing state when being extruded from a 3D printer, and is converted into a solid state and a fixed shape by means of temperature change after being extruded. The invention adopts the printing head with the annular outlet to print, and directly prints the pipeline with solid-liquid phase material as the pipe wall.
In the present invention, the multiphase ink includes an oil-water two-phase ink or a gas-water two-phase ink. In the present invention, when the ink is a multiphase ink, printing is preferably performed using a print head with a circular outlet.
In the invention, the oil-water two-phase ink is an oil-water two-phase emulsion. In the present invention, the oil-water two-phase ink preferably includes an aqueous phase, an oil phase, and a two-phase interfacial stabilizer. In the present invention, the two-phase interface stabilizer preferably includes at least one of a nanomaterial, a surfactant, and an amphiphilic polymer; the nanomaterial is preferably at least one of graphene oxide, hectorite, cellulose nanocrystals, cellulose nanofibers, carbon nanotubes, silver nanoparticles, molybdenum sulfide and MAXene carbon materials; the surfactant is preferably at least one of didodecyl dimethyl ammonium bromide, dodecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide, polydimethylsiloxane with amino end groups, amino-terminated polystyrene, sodium dodecyl sulfate, sodium hexadecyl sulfate, sodium octadecyl sulfate, sodium dioctyl succinate sulfonate and sodium dodecyl benzene sulfonate; the amphiphilic polymer is preferably at least one of polydiallyl dimethyl ammonium chloride, polyallylamine, polyvinylamine, and polyvinylpyridine. In the present invention, the oil phase preferably includes a pipe wall material, a sealing material, or a hydrophobic finishing material. In the invention, the pipe wall material is preferably at least one of epoxy resin, polyurethane and polystyrene; the sealing material is preferably at least one of methyl palmitate, paraffin, octadecane and lauric acid; the hydrophobic modification material is preferably at least one of a silane coupling agent, stearic acid and a fluorocarbon silane coupling agent.
In the invention, the volume ratio of the water phase to the oil phase in the oil-water two-phase ink is preferably 1:0.05 to 9, more preferably 1:0.2 to 9. The invention controls the volume ratio of the water phase to the oil phase in the range, can ensure that emulsion can not be demulsified, and ensures that the 3D printing multiphase ink has stable performance and obtains a pipeline with better performance.
In the invention, the two-phase interface stabilizer in the oil-water two-phase ink accounts for 0.05 to 10 weight percent of the oil phase, and more preferably 0.1 to 5 weight percent.
In the present invention, the oil-water two-phase ink preferably includes a crosslinkable oil-water two-phase ink or a thixotropic oil-water two-phase ink. In the invention, the crosslinkable oil-water two-phase ink comprises a polymer containing carboxylic acid groups, a nano material containing carboxylic acid groups and a co-emulsifier which are dispersed in the water phase, besides the water phase, the oil phase and the two-phase interface stabilizer. In the present invention, the carboxylic acid group-containing polymer preferably includes sodium alginate, cellulose acetate, or carboxymethyl cellulose; the carboxylic acid group-containing nanomaterial preferably comprises graphene oxide or cellulose acetate nanocrystals; the co-emulsifier preferably comprises n-butanol, ethylene glycol, ethanol, propylene glycol, glycerol, polyglycerol esters or tween 80. In the present invention, the mass content of the carboxylic acid group-containing polymer, the carboxylic acid group-containing nanomaterial, and the co-emulsifier in the aqueous phase is independently preferably 0.5 to 30wt%, more preferably 0.5 to 5wt%.
In the invention, the oil-water two-phase ink keeps a flowing state when being extruded from a 3D printer, and is molded after extrusion. When the oil-water two-phase ink is the crosslinkable oil-water two-phase ink, the multiphase ink is formed by ionic crosslinking in the cement-based material slurry. When the oil-water two-phase ink is thixotropic oil-water two-phase ink, the oil-water two-phase ink is formed by relying on the shear thinning effect and the high-modulus rheological property of the oil-water two-phase ink, and the shear thinning effect ensures that the ink keeps a fluid state under the action of shear stress in the extrusion process; the high modulus ensures that the ink quickly returns to a viscoelastic solid state after extrusion, thereby preserving the printed shape and structure.
In the invention, the oil-water two-phase ink is firstly used as a pipeline template after being molded, water in the oil-water two-phase ink participates in hydration along with solidification and drying of the cement-based material slurry, the ink loses stability to release an oil phase, and the released oil phase is adsorbed by the porous cement-based pipe wall to form a pipeline taking the oil phase material as the pipe wall.
In the invention, the gas-water two-phase ink is a gas-water two-phase emulsion. In the present invention, the gas-water two-phase ink preferably includes an aqueous phase, a gas phase, and an interfacial stabilizer; the interfacial stabilizer preferably comprises at least one of nanoparticles, surfactants, polymeric micro-nanoparticles, and proteins. In the present invention, the nanoparticle is preferably at least one of silica, titania, clay particles, fibrous sepiolite, anatase particles, cellulose nanocrystals, cellulose nanofibers, and surface-modified particles of the above nanoparticles; the smallest dimension of the nanoparticle is preferably 1 to 100nm. In the present invention, the surfactant is preferably at least one of didodecyl dimethyl ammonium bromide, dodecyl trimethyl ammonium bromide, cetyl trimethyl ammonium bromide, polydimethyl siloxane having amino groups as both end groups, dodecyl polyoxyethylene, sodium succinate sulfonate, sodium dodecyl sulfate, ammonium dodecyl sulfate, cationic perfluoro polyether trimethyl amine acetate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium laureth sulfate, ammonium laureth sulfate, and the like. In the present invention, the polymer micro-nano particles are preferably at least one of polystyrene hybrid particles; the polystyrene hybrid particles are preferably 2,2 '-azobisisobutylamidine dihydrochloride-styrene particles and polyethylene methacrylate-2, 2' -azobisisobutylamidine dihydrochloride-styrene particles or styrene particles of diethylaminoethyl methacrylate polymeric chains. In the present invention, the protein is preferably at least one of whey protein WPI, sodium caseinate, gelatin and pure beta-lactoglobulin. In the present invention, the gas phase is preferably at least one of air and carbon dioxide.
In the present invention, the volume ratio of the water phase and the gas phase in the gas-water two-phase ink is preferably 1:0.05 to 9, more preferably 1:2 to 9. The invention controls the volume ratio of the water phase to the gas phase in the range, can ensure that emulsion does not break, and ensures that the 3D printing multiphase ink has stable performance.
In the invention, the gas-water two-phase ink keeps a flowing state when being extruded from a 3D printer, and is molded after extrusion. The formed printing ink is firstly used as a pipeline template, and along with solidification and drying of the cement-based material slurry, water in the gas-water two-phase printing ink participates in hydration, emulsion loses stability, and bubbles are broken, so that a pipeline taking the cement-based material as a pipe wall is formed. In the present invention, the cement-based material slurry flows to fill gaps, and the net flowing water pressure is used, so that the slurry cannot flow in a large range.
In the invention, the inner diameter of the needle tube of the 3D printer is preferably 1-2 mm; the extrusion flow is preferably 1-3 mL/min; the speed of movement of the print head is preferably 5 to 45mm/s, more preferably 15 to 20mm/s.
The invention provides the application of the pipeline obtained by the in-situ construction method in material transmission, wiring or defect stress restoration. The macro-sized pipeline prepared by the invention can solve the problems of mass transmission and wiring in the 3D building structure; the micro-scale pipeline prepared by the invention can be used for transmitting a repairing agent and repairing defects and stress among 3D printing cement-based material layers. The inner diameter of the pipe prepared by the invention is preferably 0.05-50 mm, more preferably 0.1-20 mm; the inner diameter of the macro-sized pipeline is preferably 1-20 mm; the inner diameter of the microscale conduit is preferably 0.1-0.5 mm.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Dissolving sodium alginate in water to obtain sodium alginate solution; the mass content of sodium alginate in the sodium alginate solution is 2.5%;
taking the sodium alginate solution as a water phase, methyl palmitate as an oil phase and Tween 80 as a two-phase interface stabilizer to obtain oil-water two-phase ink with the volume ratio of the oil phase to the water phase being 1:2; the tween 80 accounts for 1.0 percent of the mass fraction of the oil phase.
Mixing water and P.O 42.5.42.5 cement according to a mass ratio of 0.4:1 to obtain cement paste;
and (3) taking the oil-water two-phase ink as the ink for 3D printing, burying a printing head of a 3D printer into the cement paste, writing the oil-water two-phase ink in the 3D printer into the cement paste under the control of a printing program, printing a program-set structure of the oil-water two-phase ink in the cement paste, absorbing water in the oil-water two-phase ink by cement to participate in hydration after the cement paste is solidified, losing stability of the two-phase ink, releasing an oil phase, namely methyl palmitate, and sealing and decorating the porous cement-based pipe wall to obtain the hollow pipeline.
The printing head of the 3D printer is a circular outlet; the inside diameter of the needle tube of the 3D printer is 1.64mm, the extrusion flow is 3mL/min, the moving speed of the printing head is 15mm/s, and the obtained hollow pipeline is shown in figure 2. The pipeline is spiral structure, and pipeline diameter is 2mm.
By pumping sodium silicate solution into the hollow pipeline, the sodium silicate solution can enter from the inlet of the pipeline and flow out from the outlet of the pipeline, and the volume ratio of the sodium silicate solution flowing in and flowing out is more than 98 percent, so that the pipeline has better transmission capability for the aqueous reagent.
Example 2
The thixotropic oil-water two-phase ink is prepared by taking a hectorite (Lap) aqueous solution with the mass fraction of 5% as a water phase, methyl palmitate as an oil phase, and hectorite and didodecyl dimethyl ammonium bromide as a composite interface stabilizer (the mass ratio of the hectorite to the didodecyl dimethyl ammonium bromide is 5:0.1) and using a Pickering emulsion method; the volume ratio of the oil phase to the water phase is 1:2.
Mixing water and P.O 42.5.42.5 cement according to a mass ratio of 0.4:1 to obtain cement paste;
and (3) taking the oil-water two-phase ink as the ink for 3D printing, burying a printing head of a 3D printer into the cement paste, writing the oil-water two-phase ink in the 3D printer into the cement paste under the control of a printing program, printing a programmed structure of the oil-water two-phase ink in the cement paste, absorbing water in the oil-water two-phase ink by cement after the cement paste is solidified, participating in hydration, losing stability of the two-phase ink, releasing an oil phase, namely methyl palmitate, and sealing and decorating the porous cement-based pipe wall, thereby obtaining the hollow pipeline.
The printing head of the 3D printer is a circular outlet; the inside diameter of the needle tube of the 3D printer is 1.64mm,3mL/min, the moving speed of the printing head is 20mm/s, and the obtained hollow pipeline is shown in figure 3. The pipeline is of a spiral structure, and the diameter of the pipeline is 1.54mm.
By pumping sodium silicate solution into the hollow pipeline, the sodium silicate solution can enter from the inlet of the pipeline and flow out from the outlet of the pipeline, and the volume ratio of the sodium silicate solution flowing in and flowing out is more than 98 percent, so that the pipeline has better transmission capability for the aqueous reagent.
Example 3
Silica (Lap) nano particles with the particle size of 10nm are used as an interface stabilizer and dispersed in water to form an aqueous phase dispersion liquid with the mass fraction of 5%; air was used as a gas phase, and a gas-water emulsion (foam) having a gas volume ratio of more than 95% was prepared under stirring at 400 rpm.
Mixing water and P.O 42.5.42.5 cement according to a mass ratio of 0.4:1 to obtain cement paste;
and taking the air-water emulsion as ink for 3D printing, embedding a printing head of a 3D printer into the cement paste, writing the air-water emulsion ink in the 3D printer into the cement paste under the control of a printing program, printing a structure set by the program of the air-water emulsion ink in the cement paste, and releasing a pipeline space by disproportionation (bubble cracking) of the air-water emulsion along with the diffusion of gas and the influence of high pH inside the cement-based material after the cement paste is solidified, so that a hollow pipeline without a pipe wall is obtained in the cement-based material.
The printing head of the 3D printer is a circular outlet; the inner diameter of a needle tube of the 3D printer is 1.64mm, the extrusion flow is 3mL/min, the moving speed of a printing head is 20mm/s, the obtained hollow pipeline is of a Zigzag structure, the schematic diagram is shown in figures 4-5, and the diameter of the pipeline is 1.60mm.
Example 4
Printing in cement paste (water and P.O 42.5.5 cement are mixed according to the mass ratio of 0.4:1) by using thermoplastic polymer polylactic acid (PLA) as ink, and constructing a hollow pipeline by using PLA as a pipe wall in situ.
And taking the PLA as the ink for 3D printing, embedding a printing head of a 3D printer into the cement paste, and heating the PLA to 230 ℃ under the control of a printing program to enable the PLA to be in a liquid state. Extruding PLA into an annular tubular print head and printing into the grout, the extruded PLA curing within the cementitious material to form a pipeline and to form a programmed structure. The cement paste flow fills the trace of the print head run and the gap with the PLA tube. And after the cement paste is solidified, obtaining the cement structure with the pipeline.
The printing head of the 3D printer is an annular outlet; the inner diameter of a printing head ring of the 3D printer is 1.64mm, the outer diameter of the printing head ring is 2.14mm, the extrusion flow is 3mL/min, the moving speed of the printing head is 15mm/s, and a hollow pipeline with the PLA pipe wall thickness of 0.5mm is obtained. The pipeline is spiral structure, and pipeline diameter is 2mm.
The volume ratio of the liquid flowing in and out can reach more than 99% by pumping aqueous repairing agent sodium silicate solution or oily repairing agent epoxy resin into the hollow pipeline, and the pipeline is proved to have better transmission capability for the repairing agent.
Example 5
The phase-change material (stearic acid) is used as ink, printing is carried out in cement paste (water and P.O 42.5.42.5 cement are mixed according to the mass ratio of 0.4:1), and a hollow pipeline taking stearic acid as a pipe wall is constructed in situ.
And taking the stearic acid as 3D printing ink, embedding a printing head of a 3D printer into the cement paste, and heating the stearic acid to 90 ℃ under the control of a printing program to enable the stearic acid to be in a liquid state. Extruding liquid stearic acid into an annular tubular printing head and printing the liquid stearic acid into the cement paste, cooling the extruded stearic acid in a cement-based material to solidify to form a pipeline, and forming a programmed structure. The cement paste flows to fill the mark of the operation of the printing head and the gap between the printing head and the stearic acid pipe. And after the cement paste is solidified, obtaining the cement structure with the pipeline.
The printing head of the 3D printer is an annular outlet; the inner diameter of a printing head of the 3D printer is 1.64mm, the outer diameter of the printing head is 2.14mm, the extrusion flow is 3mL/min, the moving speed of the printing head is 15mm/s, and a hollow pipeline with the wall thickness of the stearic acid pipe being 0.5mm is obtained. The pipeline is spiral structure, and pipeline diameter is 2mm.
The volume ratio of the liquid flowing in and out can reach more than 99% by pumping aqueous repairing agent sodium silicate solution or oily repairing agent epoxy resin into the hollow pipeline, and the pipeline is proved to have better transmission capability for the repairing agent.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (3)
1. An in-situ construction method of a pipeline in a cement-based material comprises the following steps:
embedding a printing head of a 3D printer into a cement-based material slurry body, writing ink in the 3D printer into the cement-based material slurry body under the control of a printing program, enabling the cement-based material slurry body to flow after printing and landfill a track left by the movement of the printing head, printing a program-set structure by the ink in the cement-based material slurry body, and sacrificing the ink to leave a pipeline after the cement-based material slurry body is solidified;
the ink is multiphase ink; the multiphase ink is gas-water two-phase ink; the gas-water two-phase ink is a gas-water two-phase emulsion; the gas-water two-phase ink comprises a water phase, a gas phase and an interface stabilizer; the volume ratio of the water phase to the gas phase in the gas-water two-phase ink is 1:0.05 to 9;
when the ink is a multiphase ink, a printhead with a circular outlet is used for printing.
2. The in situ construction method according to claim 1, wherein the cement-based material slurry body has an initial setting time of more than 10min.
3. Use of a pipe obtained by the in situ construction method according to any one of claims 1-2 for transporting a substance, wiring or defect, and for stress repair.
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