CN116516969B - Plugging method for underground concrete - Google Patents
Plugging method for underground concrete Download PDFInfo
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- CN116516969B CN116516969B CN202310329695.7A CN202310329695A CN116516969B CN 116516969 B CN116516969 B CN 116516969B CN 202310329695 A CN202310329695 A CN 202310329695A CN 116516969 B CN116516969 B CN 116516969B
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- 239000004567 concrete Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 143
- 239000000945 filler Substances 0.000 claims abstract description 92
- 239000011083 cement mortar Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000005507 spraying Methods 0.000 claims abstract description 38
- 238000001035 drying Methods 0.000 claims abstract description 27
- 229920002635 polyurethane Polymers 0.000 claims abstract description 26
- 239000004814 polyurethane Substances 0.000 claims abstract description 26
- 238000011049 filling Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000003973 paint Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 92
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 65
- 239000002202 Polyethylene glycol Substances 0.000 claims description 42
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 42
- 229920001223 polyethylene glycol Polymers 0.000 claims description 42
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 42
- -1 zirconium dioxide modified carbon fiber Chemical class 0.000 claims description 42
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 39
- 239000004917 carbon fiber Substances 0.000 claims description 39
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 38
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 37
- 239000004576 sand Substances 0.000 claims description 37
- 239000000395 magnesium oxide Substances 0.000 claims description 35
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 35
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 32
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 23
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 23
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 21
- 239000004575 stone Substances 0.000 claims description 21
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 17
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 15
- 229960001124 trientine Drugs 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000010440 gypsum Substances 0.000 claims description 7
- 229910052602 gypsum Inorganic materials 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 229940113116 polyethylene glycol 1000 Drugs 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 abstract description 16
- 238000009435 building construction Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 49
- 230000000694 effects Effects 0.000 description 45
- 238000002360 preparation method Methods 0.000 description 45
- 230000000052 comparative effect Effects 0.000 description 16
- 239000002250 absorbent Substances 0.000 description 10
- 239000000377 silicon dioxide Substances 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 230000035515 penetration Effects 0.000 description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000001856 Ethyl cellulose Substances 0.000 description 4
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 229920001249 ethyl cellulose Polymers 0.000 description 4
- 235000019325 ethyl cellulose Nutrition 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000010451 perlite Substances 0.000 description 3
- 235000019362 perlite Nutrition 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
- C08J7/0423—Coating with two or more layers, where at least one layer of a composition contains a polymer binder with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/06—Coating with compositions not containing macromolecular substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
- E02D31/04—Watertight packings for use under hydraulic pressure
-
- 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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- C04B2111/72—Repairing or restoring existing buildings or building 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The application relates to the field of building construction, and particularly discloses a plugging method of underground concrete, which comprises the following steps: s1, digging a working groove at a hole and a crack on the surface of concrete, wherein the width of the working groove is 1.2-2 times of the width of the hole or the crack, and the depth is 1.5-2.5 times of the depth of the hole or the crack; s2, spraying water-absorbing filler particles in the working groove, uniformly filling cement mortar, wherein the mass ratio of the water-absorbing filler particles to the cement mortar is 0.1-0.2:1, coating polyurethane waterproof paint on the surface after the cement mortar is solidified, and drying to complete plugging; the positions around the holes and the cracks are not easy to permeate water while the holes and the cracks are not easy to permeate water, and the underground concrete after plugging still has higher strength.
Description
Technical Field
The application relates to the field of building construction, in particular to a method for plugging underground concrete.
Background
Concrete is a building material made by mixing cement, broken stone, sand and other fillers, and is widely applied to the fields of bridge construction, house construction, underground tunnels and the like.
Underground concrete applied to houses, basements, underground parking lots and the like is often prone to leakage problems; for surface holes and cracks of some underground concrete, a plugging and leaking stoppage method is generally adopted, after a substrate is treated cleanly, working pits are dug at the positions of the holes and the cracks, and then mortar is poured for filling; but not only the positions of the holes and the cracks can be contacted with water, but also the peripheries of the holes and the cracks can be contacted with the water of the water seepage; if the working pit is too large, the strength of the whole concrete is affected, because the filled mortar is generally prepared by mixing cement, slaked lime, gypsum and other substances, the original concrete is composed of cement, coarse aggregate, fine aggregate and other substances, the mechanical strength of the concrete can be improved by adding the coarse aggregate, and the mechanical strength of the filling position is easily affected because the filling position is not provided with the coarse aggregate with larger strength, so that the strength of the underground concrete after the whole leakage is affected; if the working pit is too small, the problem of rapid water seepage is easy to occur again at the surrounding positions of the hole and the crack after plugging.
Therefore, when the underground concrete is plugged, the positions around the holes and the cracks are not easy to permeate water while the holes and the cracks are not easy to permeate water, and the plugged underground concrete still has higher strength.
Disclosure of Invention
In order to ensure that the positions around the holes and the cracks are not easy to permeate water while the holes and the cracks are not easy to permeate water, and the underground concrete after plugging still has higher strength, the application provides a plugging method of the underground concrete.
The application provides a plugging method of underground concrete, which adopts the following technical scheme:
a plugging method of underground concrete comprises the following steps:
s1, digging a working groove at a hole and a crack on the surface of concrete, wherein the width of the working groove is 1.2-2 times of the width of the hole or the crack, and the depth is 1.5-2.5 times of the depth of the hole or the crack;
s2, spraying water-absorbing filler particles in the working groove, uniformly filling cement mortar, wherein the mass ratio of the water-absorbing filler particles to the cement mortar is 0.1-0.2:1, coating polyurethane waterproof paint on the surface after the cement mortar is solidified, and drying to complete plugging.
By adopting the technical scheme, the width and the depth of the working groove are limited, so that the working groove still has a good plugging effect under the condition of smaller depth and width of the working groove; spraying water-absorbing filler particles in the working groove, filling cement mortar, and utilizing the dispersion filling effect of the water-absorbing filler particles to facilitate the absorption of water near the working groove, so that the residual water in and near the working groove can be better removed, the plugging effect is improved, and after the polyurethane waterproof paint is coated on the filling surface, the moisture absorption drying effect of the polyurethane waterproof paint and the better waterproof effect after the polyurethane waterproof paint is cured are utilized, thereby ensuring that the positions around holes and cracks are not easy to permeate water while ensuring that the positions around the holes and the cracks are also not easy to permeate water; meanwhile, the underground concrete after plugging still has higher strength by utilizing the filling effect of the water-absorbing filler particles and the cement mortar.
Preferably, the water-absorbing filler particles are prepared by the following method:
uniformly spraying polyethylene glycol ethanol solution on the surfaces of sodium polyacrylate particles, wherein the mass ratio of the sodium polyacrylate to the polyethylene glycol ethanol solution is 1:0.5-1, then spraying magnesium oxide particles, wherein the mass ratio of the sodium polyacrylate to the magnesium oxide particles is 1:1-2, and drying to obtain the water-absorbing filler particles.
By adopting the technical scheme, the sodium polyacrylate particles, the polyethylene glycol ethanol solution and the magnesium oxide particles are matched, and in the process of preparing the water-absorbing filler particles, the adhesion of the magnesium oxide particles on the surfaces of the sodium polyacrylate particles by using the viscosity of the polyethylene glycol ethanol solution can be realized because the sodium polyacrylate and the magnesium oxide are insoluble in ethanol.
Sodium polyacrylate particles, polyethylene glycol ethanol solution and magnesium oxide particles are matched, when water-absorbing filler particles are placed in a working groove, polyethylene glycol can be dissolved by utilizing the water-absorbing and water-dissolving effect of polyethylene glycol, magnesium oxide particles are separated from the surfaces of sodium polyacrylate particles, the flowability of the solution after polyethylene glycol dissolution is matched with the small particle migration effect of the magnesium oxide particles, so that the polyethylene glycol solution can move to the position nearby the working groove together with the magnesium oxide particles, the holes nearby the working groove are filled, the magnesium oxide particles and moisture gradually react to generate precipitate particles to remove water in the internal structure of the underground concrete, and meanwhile, the holes of the internal structure of the concrete are filled, and the moisture nearby the magnesium oxide particles gradually runs off, so that the moisture in the polyethylene glycol solution gradually runs off, the viscosity of the polyethylene glycol gradually rises, the precipitate generated by the reaction of the magnesium oxide particles or the magnesium oxide particles is conveniently bonded in the holes of the internal structure of the concrete, the plugging and the filling of the positions nearby the holes and the cracks are realized, the water seepage is not easy to occur at the surrounding positions, and the mechanical strength of the concrete is improved.
Meanwhile, the particle filling effect of the sodium polyacrylate is utilized to enable the sodium polyacrylate particles to be filled in holes and cracks, the holes and cracks are filled by utilizing the water absorption expansion effect of the sodium polyacrylate, and the filling effect of generating precipitation by matching with magnesia particles and magnesia particles which do not flow along with polyethylene glycol solution is utilized, so that the holes and cracks of underground concrete are not easy to permeate water, the plugging effect of the underground concrete is improved, and the mechanical strength of the underground concrete is ensured; therefore, the holes and the cracks of the underground concrete are not easy to permeate water, and the positions around the holes and the cracks are also not easy to permeate water, and the underground concrete after plugging still has higher strength.
Preferably, the particle size of the sodium polyacrylate particles is 10-40 mu m, and the particle size of the magnesium oxide particles is 40-120nm.
By adopting the technical scheme, the particle sizes of the sodium polyacrylate particles and the magnesium oxide particles are limited, so that the sodium polyacrylate particles are filled in holes and cracks, the magnesium oxide particles can be filled in small holes around the holes and the cracks, the holes, the cracks and the positions around the holes and the cracks can be filled, moisture is absorbed, the effect of difficult water seepage is achieved, and the underground concrete after plugging still has higher mechanical strength.
Sodium polyacrylate particles are matched with calcium hydroxide cementing materials, along with the water absorption expansion among sodium polyacrylate, dissolved calcium hydroxide in concrete is gradually contacted with the sodium polyacrylate particles, and the sodium polyacrylate particles can form precipitation in calcium hydroxide solution, so that the cementing materials in concrete are stabilized, the leakage blocking effect of underground concrete holes and cracks is improved by avoiding the loss of the cementing materials and the expansion filling effect of the sodium polyacrylate particles, and the mechanical strength of the concrete holes and cracks can be ensured.
Preferably, the polyethylene glycol ethanol solution is prepared by dissolving polyethylene glycol 1000 in absolute ethanol under stirring, and the concentration of the polyethylene glycol ethanol solution is 20-30%.
Through adopting above-mentioned technical scheme, utilize polyethylene glycol 1000 to dissolve the back appropriate viscidity to inject the concentration after dissolving, guarantee that magnesium oxide particle can migrate in concrete inner structure, and make it meet water and dissolve the back with the loss of moisture, can play the bonding effect, improve underground concrete inner structure density, thereby improve underground concrete's mechanical strength.
Preferably, the cement mortar comprises the following raw materials in parts by weight: 90-110 parts of cement, 650-800 parts of modified sand, 10-15 parts of gypsum, 10-20 parts of filler, 45-55 parts of water and 3.2-4 parts of water reducer; the modified sand is prepared by modifying sand stone mixed by quartz sand and medium sand by triethylene tetramine.
By adopting the technical scheme, the cement, the modified sand and the filler are matched, so that the prepared cement mortar has higher mechanical strength, and after being filled into the working pit, the working pit has higher strength, so that the underground concrete after plugging has higher mechanical strength.
The silica sand, the triethylene tetramine, the sodium polyacrylate particles and the polyethylene glycol are matched, amino groups of the triethylene tetramine are adhered to the surface of the silica sand and are connected with carboxyl groups in the sodium polyacrylate and hydroxyl groups in the polyethylene glycol in an attractive manner, so that the bonding effect of cement mortar and water-absorbent filler particles is improved, the water-absorbent filler particles can be improved under the action of the polyethylene glycol, the cement mortar and the water-absorbent filler particles are bonded with underground concrete stably and tightly, and the mechanical strength of the underground concrete is ensured while the plugging effect is realized.
Preferably, the modified sand is prepared by the following method:
weighing quartz sand and medium sand according to the mass ratio of 1:2-4, and uniformly mixing and stirring to obtain sand stone; and (3) placing the sand stone into triethylene tetramine solution for soaking and stirring, taking out the sand stone, and drying to obtain the modified sand.
By adopting the technical scheme, the triethylene tetramine solution is loaded on the surfaces of the quartz sand and the medium sand, so that the modified sand and the water-absorbing filler particles are bonded, and the cement mortar has high strength and good plugging effect.
Preferably, the filler is prepared by the following method:
uniformly spraying a polyvinyl alcohol solution on the surface of the carbon fiber, wherein the mass ratio of the carbon fiber to the polyvinyl alcohol solution is 1:0.25-0.5, then spraying zirconium dioxide, the mass ratio of the carbon fiber to the zirconium dioxide is 1:1-2, and drying to obtain the zirconium dioxide modified carbon fiber; uniformly spraying a polyvinyl alcohol solution on the surface of the carbon fiber, wherein the mass ratio of the carbon fiber to the polyvinyl alcohol solution is 1:0.25-0.5, uniformly spraying carbon nitride, wherein the mass ratio of the carbon fiber to the carbon nitride is 1:1-2, and drying to obtain the carbon nitride modified carbon fiber; uniformly mixing the zirconium dioxide modified carbon fiber and the carbon nitride modified carbon fiber according to the mass ratio of 0.5-2:1 to obtain the filler.
Through adopting above-mentioned technical scheme, zirconium dioxide modified carbon fiber, the modified carbon fiber of carbon nitride cooperate, in-process is prepared, utilize the better viscidity of polyvinyl alcohol solution, be convenient for with the stable bonding of zirconium dioxide on the carbon fiber surface, the carbon nitride also can stably bond on the carbon fiber surface, utilize carbon fiber, zirconium dioxide, the filling connection effect of carbon nitride, can improve cement mortar's mechanical strength, and the viscidity has after the polyvinyl alcohol water-soluble, can further be with the comparatively stable and underground concrete looks bonding of each raw materials in the cement mortar, improve the structural density of underground concrete after the leaking stoppage, thereby have higher mechanical strength when making underground concrete leaking stoppage effect better.
Preferably, the length of the carbon fiber in the zirconium dioxide modified carbon fiber is 3-5mm, and the grain size of the zirconium dioxide is 100-200 mu m.
Preferably, the carbon fiber length of the carbon nitride modified carbon fiber is 1-3mm, and the carbon nitride particle size is 10-50 mu m.
By adopting the technical scheme, the length of the carbon fiber in the zirconium dioxide modified carbon fiber is greater than that of the carbon fiber in the carbon nitride modified carbon fiber, the grain size of the zirconium dioxide is greater than that of the carbon nitride, meanwhile, the density of the zirconium dioxide is greater, the density of the carbon nitride is smaller, the zirconium dioxide modified carbon fiber is easy to generate in mortar, the zirconium dioxide modified carbon fiber is positioned at the middle lower part of the working pit, and the carbon nitride modified carbon fiber is positioned at the upper part of the working pit, so that the tight adhesion of the fiber filler of the working pit is realized, and the mechanical strength of cement mortar in the working pit is ensured by using the strength of the zirconium dioxide, the carbon fiber and the carbon nitride, so that the underground concrete after plugging still has higher mechanical strength.
When cement mortar is hydrated and solidified, heat at the position of the working pit close to the bottom can be transferred to carbon fibers in carbon nitride modified carbon fibers along with carbon fibers in zirconium dioxide modified carbon fibers and finally transferred to the surface of carbon nitride, and carbon nitride is easy to locate at the upper layer of the working pit due to light weight and is matched with the heat conduction effect of the carbon nitride, so that heat transfer and dissipation from the bottom to the top in the working pit are facilitated, the solidification density of the cement mortar is ensured, and the effect of leaking stoppage and mechanical strength caused by gap influence due to shrinkage are avoided as much as possible.
Preferably, the coating area of the polyurethane waterproof coating is 2-5 times of the length of the working groove and 2-5 times of the width of the working groove.
Through adopting above-mentioned technical scheme, utilize polyurethane waterproof coating to cooperate with the hydroxyl in the polyvinyl alcohol on carbon nitride modified carbon fiber surface, make the comparatively stable adhesion of polyurethane waterproof coating on cement mortar surface, utilize the hydrophobic effect of polyurethane waterproof coating, guarantee the mechanical strength of underground concrete when preventing underground concrete seepage.
In summary, the application has the following beneficial effects:
1. spraying water-absorbing filler particles in the working groove, filling cement mortar, and utilizing the dispersion filling effect of the water-absorbing filler particles to facilitate the absorption of water near the working groove, so that the residual water in and near the working groove can be better removed, the plugging effect is improved, and after the polyurethane waterproof paint is coated on the filling surface, the moisture absorption drying effect of the polyurethane waterproof paint and the better waterproof effect after the polyurethane waterproof paint is cured are utilized, thereby ensuring that the positions around holes and cracks are not easy to permeate water while ensuring that the positions around the holes and the cracks are also not easy to permeate water; meanwhile, the underground concrete after plugging still has higher strength by utilizing the filling effect of the water-absorbing filler particles and the cement mortar.
2. Sodium polyacrylate particles, polyethylene glycol ethanol solution and magnesium oxide particles are matched, the mobility of the solution after polyethylene glycol dissolution is matched with the small particle migration effect of the magnesium oxide particles, the holes near the working groove are filled, and the holes and cracks are filled by the water absorption expansion effect of sodium polyacrylate, so that the holes and the cracks of underground concrete are not easy to permeate water, the positions around the holes and the cracks are also not easy to permeate water, and the underground concrete after plugging still has higher strength.
3. The silica sand, the triethylene tetramine, the sodium polyacrylate particles and the polyethylene glycol are matched, amino groups of the triethylene tetramine are adhered to the surface of the silica sand and are connected with carboxyl groups in the sodium polyacrylate and hydroxyl groups in the polyethylene glycol in an attractive manner, so that the bonding effect of cement mortar and water-absorbent filler particles is improved, the water-absorbent filler particles can be improved under the action of the polyethylene glycol, the cement mortar and the water-absorbent filler particles are bonded with underground concrete stably and tightly, and the mechanical strength of the underground concrete is ensured while the plugging effect is realized.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation of Water-absorbent Filler particles
Preparation example 1: the water-absorbing filler particles are prepared by the following method:
uniformly spraying 0.8kg of polyethylene glycol ethanol solution on the surface of 1kg of sodium polyacrylate particles, wherein the particle size of the sodium polyacrylate particles is 20 mu m, and the molecular weight is 10000Da; the polyethylene glycol ethanol solution is prepared by dissolving polyethylene glycol 1000 in absolute ethanol under stirring, wherein the concentration of the polyethylene glycol ethanol solution is 25%, the mass fraction of the absolute ethanol is 99%, spraying 1.6kg of magnesium oxide particles with the particle diameter of 80nm, and drying to obtain the water-absorbing filler particles.
Preparation example 2: the present preparation example differs from preparation example 1 in that:
uniformly spraying 0.5kg of polyethylene glycol ethanol solution on the surface of 1kg of sodium polyacrylate particles, wherein the particle size of the sodium polyacrylate particles is 10 mu m, the concentration of the polyethylene glycol ethanol solution is 20%, then spraying 1kg of magnesium oxide particles, the particle size of the magnesium oxide particles is 40nm, and drying to obtain the water-absorbing filler particles.
Preparation example 3: the present preparation example differs from preparation example 1 in that:
uniformly spraying 1kg of polyethylene glycol ethanol solution on the surfaces of 1kg of sodium polyacrylate particles, wherein the particle size of the sodium polyacrylate particles is 40 mu m, the concentration of the polyethylene glycol ethanol solution is 30%, then spraying 2kg of magnesium oxide particles, the particle size of the magnesium oxide particles is 120nm, and drying to obtain the water-absorbing filler particles.
Preparation example of modified Sand
Preparation example 4: the modified sand is prepared by the following method:
weighing 100kg of quartz sand and 300kg of medium sand, and uniformly mixing and stirring to obtain sand stone; the quartz sand has a mud content less than 1.0%, a grain diameter of 1-2mm, a middle sand of II zone sand and an apparent density of 2660kg/m 3 The fineness modulus is 2.5, and the mud content is less than 1.0%; every 100kg of sand stone is placed in 300kg of triethylene tetramine solution, soaked and stirred for 10min, the concentration of the triethylene tetramine is 10%, then the sand stone is taken out, and the modified sand is prepared after drying.
Preparation example 5: the present preparation example differs from preparation example 4 in that:
100kg of quartz sand and 200kg of medium sand are weighed, mixed and stirred uniformly to prepare sand stone, each 100kg of sand stone is placed in 300kg of triethylene tetramine solution to be soaked and stirred for 10min, the concentration of the triethylene tetramine is 10%, then the sand stone is taken out, and the sand stone is dried to prepare the modified sand.
Preparation example 6: the present preparation example differs from preparation example 4 in that:
weighing 100kg of quartz sand and 400kg of medium sand, uniformly mixing and stirring to obtain sand stone, soaking and stirring every 100kg of sand stone in 300kg of triethylene tetramine solution for 10min, taking out the sand stone, and drying to obtain the modified sand.
Preparation of filler
Preparation example 7: the filler is prepared by the following method:
uniformly spraying 0.4kg of polyvinyl alcohol solution on the surface of 1kg of carbon fiber, then spraying 1.5kg of zirconium dioxide, and drying to obtain zirconium dioxide modified carbon fiber; the length of the carbon fiber is 5mm, and the grain diameter of the zirconium dioxide is 150 mu m; the polyvinyl alcohol solution is a polyvinyl alcohol aqueous solution with the mass fraction of 5%;
uniformly spraying 0.4kg of polyvinyl alcohol solution on the surface of 1kg of carbon fiber, uniformly spraying 1.5kg of carbon nitride, and drying to obtain carbon nitride modified carbon fiber; the length of the carbon fiber is 3mm, and the grain diameter of the carbon nitride is 20 mu m; the polyvinyl alcohol solution is a polyvinyl alcohol aqueous solution with the mass fraction of 5%;
and uniformly mixing and stirring 0.5kg of zirconium dioxide modified carbon fiber and 1kg of carbon nitride modified carbon fiber to prepare the filler.
Preparation example 8: the present preparation example differs from preparation example 7 in that:
uniformly spraying 0.25kg of polyvinyl alcohol solution on the surface of 1kg of carbon fiber, then spraying 1kg of zirconium dioxide, and drying to obtain zirconium dioxide modified carbon fiber; the length of the carbon fiber is 3mm, and the grain diameter of the zirconium dioxide is 100 mu m;
uniformly spraying 0.25kg of polyvinyl alcohol solution on the surface of 1kg of carbon fiber, uniformly spraying 1kg of carbon nitride, and drying to obtain carbon nitride modified carbon fiber; the length of the carbon fiber is 1mm, and the grain diameter of the carbon nitride is 10 mu m;
1kg of zirconium dioxide modified carbon fiber and 1kg of carbon nitride modified carbon fiber are mixed and stirred to prepare the filler.
Preparation example 9: the present preparation example differs from preparation example 7 in that:
uniformly spraying 0.5kg of polyvinyl alcohol solution on the surface of 1kg of carbon fiber, then spraying 2kg of zirconium dioxide, and drying to obtain zirconium dioxide modified carbon fiber; the length of the carbon fiber is 5mm, and the grain diameter of the zirconium dioxide is 200 mu m;
uniformly spraying 0.5kg of polyvinyl alcohol solution on the surface of 1kg of carbon fiber, uniformly spraying 2kg of carbon nitride, and drying to obtain carbon nitride modified carbon fiber; the length of the carbon fiber is 3mm, and the grain diameter of the carbon nitride is 50 mu m;
2kg of zirconium dioxide modified carbon fiber and 1kg of carbon nitride modified carbon fiber are mixed and stirred to prepare the filler.
Preparation example of Cement mortar
Preparation example 10: and (3) cement mortar:
100kg of cement, 720kg of modified sand, 13kg of gypsum, 15kg of filler, 50kg of water and 3.7kg of water reducer; the cement is Portland cement of P.O42.5, the modified sand is the modified sand prepared in preparation example 4, and the filler is the filler prepared in preparation example 7; the water reducer is a polycarboxylic acid high-efficiency water reducer;
the preparation method comprises the following steps:
and (3) weighing cement and gypsum, mixing and stirring uniformly, adding modified sand and filler, mixing and stirring uniformly, and finally adding water and a water reducing agent, mixing and stirring uniformly to obtain the finished cement mortar.
Preparation example 11: the present preparation example differs from preparation example 10 in that:
90kg of cement, 650kg of modified sand, 10kg of gypsum, 10kg of filler, 45kg of water and 3.2kg of water reducer; the modified sand is the modified sand prepared in preparation example 5, and the filler is the filler prepared in preparation example 8.
Preparation example 12: the present preparation example differs from preparation example 10 in that:
110kg of cement, 800kg of modified sand, 15kg of gypsum, 20kg of filler, 55kg of water and 4kg of water reducer; the modified sand is the modified sand prepared in preparation example 6, and the filler is the filler prepared in preparation example 9.
Examples
Example 1: a plugging method of underground concrete comprises the following steps:
s1, digging a working groove at a hole and a crack on the surface of concrete, wherein the width of the working groove is 1.6 times of the width of the hole or the crack, and the depth is 2 times of the depth of the hole or the crack;
s2, spraying the water-absorbing filler particles prepared in the preparation example 1 in a working groove, then uniformly pouring the cement mortar prepared in the preparation example 10, wherein the mass ratio of the water-absorbing filler particles to the cement mortar is 0.15:1, and the cement mortar completely fills the working groove to ensure that the surface height of the cement mortar is consistent with the height of underground concrete at other positions, and curing for 7d; and then coating polyurethane waterproof paint on the surface of the working groove filled with cement mortar, wherein the coating area of the polyurethane waterproof paint is 4 times of the length and 4 times of the width of the working groove, and drying to complete plugging.
Example 2: a plugging method of underground concrete comprises the following steps:
s1, digging a working groove at a hole and a crack on the surface of concrete, wherein the width of the working groove is 1.2 times of the width of the hole or the crack, and the depth is 1.5 times of the depth of the hole or the crack;
s2, spraying the water-absorbing filler particles prepared in the preparation example 2 in a working groove, then uniformly pouring the cement mortar prepared in the preparation example 11, wherein the mass ratio of the water-absorbing filler particles to the cement mortar is 0.1:1, and the cement mortar completely fills the working groove to ensure that the surface height of the cement mortar is consistent with the height of underground concrete at other positions, and curing for 7d; and then coating polyurethane waterproof paint on the surface of the working groove filled with cement mortar, wherein the coating area of the polyurethane waterproof paint is 2 times of the length and 2 times of the width of the working groove, and drying to complete plugging.
Example 3: a plugging method of underground concrete comprises the following steps:
s1, digging a working groove at a hole and a crack on the surface of concrete, wherein the width of the working groove is 2 times of that of the hole or the crack, and the depth of the working groove is 2.5 times of that of the hole or the crack;
s2, spraying the water-absorbing filler particles prepared in the preparation example 3 in a working groove, then uniformly pouring the cement mortar prepared in the preparation example 12, wherein the mass ratio of the water-absorbing filler particles to the cement mortar is 0.2:1, and the cement mortar completely fills the working groove to ensure that the surface height of the cement mortar is consistent with the height of underground concrete at other positions, and curing for 7d; and then coating polyurethane waterproof paint on the surface of the working groove filled with cement mortar, wherein the coating area of the polyurethane waterproof paint is 5 times of the length and 5 times of the width of the working groove, and drying to complete plugging.
Example 4: this embodiment differs from embodiment 1 in that:
polyethylene glycol ethanol solution and magnesium oxide particles are not added into the raw materials of the water-absorbing filler particles.
Example 5: this embodiment differs from embodiment 1 in that:
the sodium polyacrylate particles are replaced by perlite particles with the same mass in the water-absorbing filler particles.
Example 6: this embodiment differs from embodiment 1 in that:
the polyethylene glycol aqueous solution with the same mass is used for replacing the polyethylene glycol ethanol solution in the water-absorbing filler particles.
Example 7: this embodiment differs from embodiment 1 in that:
the particle size of the sodium polyacrylate particles and the magnesium oxide particles in the water-absorbing filler particles is 40 meshes.
Example 8: this embodiment differs from embodiment 1 in that:
the cement mortar is replaced by river sand with the same quality.
Example 9: this embodiment differs from embodiment 1 in that:
the cement mortar filler is replaced by polypropylene fiber with the same quality.
Example 10: this embodiment differs from embodiment 1 in that:
the zirconium dioxide modified carbon fiber is replaced by the carbon nitride modified carbon fiber with the same quality in the cement mortar filler.
Example 11: this embodiment differs from embodiment 1 in that:
the polyvinyl alcohol solution is replaced by ethyl cellulose ethanol solution with the same mass in the cement mortar filler, the concentration of the ethyl cellulose ethanol solution is 1%, and the ethanol is absolute ethanol with the mass fraction of 99%.
Example 12: this embodiment differs from embodiment 1 in that:
the cement mortar filler is silicon dioxide with the particle size of 10 meshes.
Comparative example
Comparative example 1: this comparative example differs from example 1 in that:
and S2, no water-absorbing filler particles are added in the working groove.
Comparative example 2: this comparative example differs from example 1 in that:
and S2, replacing the water-absorbing filler particles with silicon dioxide particles with the same mass, wherein the particle size of the silicon dioxide is 40 meshes.
Comparative example 3: this comparative example differs from example 1 in that:
and S2, not brushing polyurethane waterproof paint.
Performance test
1. Mechanical strength detection
The underground concrete was subjected to a plugging treatment by the method of reference examples 1 to 12 and comparative examples 1 to 3, and the compressive strength at the plugging position and at the plugging width 1.2 times was measured by the method of testing physical and mechanical properties of concrete standard of GB/T50081-2019, and the data was recorded.
2. Impervious performance test
The underground concrete was subjected to plugging treatment by the method of reference examples 1 to 12 and comparative examples 1 to 2, but the polyurethane waterproof paint was not applied in S2, and the water penetration depth was detected at the plugging position and at the position 1.2 times the plugging width by the method of testing the long-term performance and durability of ordinary concrete and the standard of the test method of the ordinary concrete, and the data was recorded by the reference GB/T50082-2009.
3. Waterproof performance detection
The underground concrete was subjected to plugging treatment by the method of reference examples 1 to 3, the plugging surface was soaked with water for 12 hours, and then the water penetration depth was detected and data was recorded.
Table 1 performance test table
As can be seen by combining the embodiments 1-3 and the table 1, the plugging method adopted by the application can well plug holes and cracks, so that the plugging position after plugging and the peripheral position thereof have higher mechanical strength and better waterproof effect.
As can be seen from the combination of examples 1 and examples 4 to 12 and the combination of table 1, in example 4, the polyethylene glycol ethanol solution and the magnesium oxide microparticles were not added to the raw material of the water absorbent filler particles, and compared with example 1, the compressive strength of both the plugging site and the plugging peripheral site in example 4 was smaller than that in example 1, and the water penetration depth was greater than that in example 1; the polyethylene glycol ethanol solution and the magnesia particles are matched, so that the holes around the plugging position can be conveniently filled, and the plugging position of the working pit can be filled, thereby improving the density of the plugging position and the surrounding thereof, and ensuring that the plugging position and the surrounding thereof have higher mechanical strength and better anti-seepage effect.
In example 5, the sodium polyacrylate particles are replaced by perlite particles with the same mass in the water-absorbing filler particles, compared with example 1, in example 5, the compressive strength of both the plugging position and the plugging surrounding position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; the perlite particles cannot interact with free calcium hydroxide, and the sodium polyacrylate particles not only absorb water and expand, but also can be matched with calcium hydroxide solution to generate precipitate, so that the plugging position and the surrounding positions are filled, the plugging effect is improved, and meanwhile, the mechanical strength is ensured.
In example 6, polyethylene glycol aqueous solution with the same mass is used for replacing polyethylene glycol ethanol solution in the water-absorbing filler particles, compared with example 1, in example 6, the compressive strength of both the plugging position and the plugging surrounding position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; it is explained that the water in the polyethylene glycol aqueous solution is easily absorbed by the sodium polyacrylate particles or reacts with the magnesium oxide particles, thereby affecting the function of the water-absorbing filler particles in the working tank.
In example 7, the particle diameters of the sodium polyacrylate particles and the magnesium oxide particles in the water-absorbing filler particles were 40 mesh, and compared with example 1, the compressive strength of both the plugging site and the plugging peripheral site in example 7 was smaller than that in example 1, and the water penetration depth was larger than that in example 1; the large grain diameter is not easy to permeate into micro cracks around the working groove, so that the structure density of plugging is easily affected, and the waterproof property and the mechanical strength are affected.
In the cement mortar of example 8, the modified sand is replaced by river sand with the same quality, compared with the cement mortar of example 1, the compressive strength of the cement mortar of example 8 at the leaking stoppage position and the leaking stoppage position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; after the sand stone is modified by triethylene tetramine, the sand stone can be matched with sodium polyacrylate particles and polyethylene glycol, so that the bonding effect of cement mortar and water-absorbing filler particles is improved, the cement mortar and the water-absorbing filler particles are more stable and compact to bond with underground concrete, the plugging effect is realized, and the mechanical strength of the underground concrete is ensured.
In the cement mortar filler of example 9, the polypropylene fibers with the same quality are used for replacing the carbon fibers, compared with the cement mortar filler of example 1, the compressive strength of the cement mortar filler of example 9 at the leaking stoppage position and the leaking stoppage position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; the polypropylene fiber is light in weight and does not have a heat conduction effect, the compactness of the structure is easily influenced when the cement mortar is solidified, and the waterproof effect and the mechanical strength after plugging are influenced.
In the cement mortar filler of example 10, the zirconium dioxide modified carbon fiber is replaced by the carbon nitride modified carbon fiber with the same quality, compared with the cement mortar filler of example 1, the compressive strength of the cement mortar filler of example 10 at the position of the plugging position or the position around the plugging position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; the carbon nitride modified carbon fiber and the zirconium dioxide modified carbon fiber are matched, and can be uniformly distributed in the working pit, so that the effects of uniformly dissipating heat and guaranteeing structural compactness are achieved, and the underground concrete after plugging has good waterproof effect and high mechanical strength.
In the cement mortar filler of example 11, the polyvinyl alcohol solution is replaced by the ethyl cellulose ethanol solution with the same mass, compared with the cement mortar filler of example 1, the compressive strength of the cement mortar filler of example 11 at the leaking stoppage position and the position around the leaking stoppage position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; the ethyl cellulose ethanol solution cannot be matched with the amino ethyl polyurethane waterproof coating in the modified sand, so that the mechanical strength and the waterproof effect of the plugging position are affected.
The cement mortar filler of example 12 is silica with a particle size of 10 meshes, and compared with example 1, the compressive strength of the cement mortar filler of example 12 at the leaking stoppage position and the leaking stoppage position is smaller than that of example 1, and the water seepage depth is larger than that of example 1; the silica particles have a filling effect, but cannot be matched with the water-absorbing filler particles and the polyurethane waterproof coating, so that the mechanical strength and the waterproof effect of the plugging position are affected.
As can be seen from the combination of examples 1 and comparative examples 1 to 3 and the combination of table 1, comparative example 1 was free of the addition of the water-absorbent filler particles, and compared with example 1, comparative example 1 was smaller in compressive strength at both the plugging site and the plugging peripheral site than example 1, and was greater in water penetration depth than example 1; the addition of the water-absorbing filler particles can improve the mechanical strength while guaranteeing the water resistance of the plugging position.
Comparative example 2 the replacement of the water-absorbent filler particles with silica particles, compared to example 1, comparative example 2 was smaller in compressive strength both at the plugged site and at the place around the plugged site than example 1, and was greater in water penetration depth than example 1; the silica particles are not easy to enter the micro-pores of the structure at the surrounding positions of the plugging working pit and cannot be matched with cement mortar, so that the waterproof effect and the mechanical strength of the plugging position and the surrounding positions are affected.
Comparative example 3, which is not coated with polyurethane waterproof paint, compared with example 1, comparative example 3 is smaller in compressive strength both at the leaking stoppage position and at the leaking stoppage peripheral position than example 1, and is larger in water penetration depth than example 1; the addition of the polyurethane waterproof coating is described, so that not only can the waterproof effect be improved, but also the mechanical strength can be improved.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (7)
1. The plugging method of the underground concrete is characterized by comprising the following steps of:
s1, digging a working groove at a hole and a crack on the surface of concrete, wherein the width of the working groove is 1.2-2 times of the width of the hole or the crack, and the depth is 1.5-2.5 times of the depth of the hole or the crack;
s2, spraying water-absorbing filler particles in the working groove, uniformly filling cement mortar, wherein the mass ratio of the water-absorbing filler particles to the cement mortar is 0.1-0.2:1, coating polyurethane waterproof paint on the surface after the cement mortar is solidified, and drying to complete plugging;
the water-absorbing filler particles are prepared by the following method:
uniformly spraying polyethylene glycol ethanol solution on the surfaces of sodium polyacrylate particles, wherein the mass ratio of the sodium polyacrylate to the polyethylene glycol ethanol solution is 1:0.5-1, then spraying magnesium oxide particles, wherein the mass ratio of the sodium polyacrylate to the magnesium oxide particles is 1:1-2, and drying to obtain water-absorbing filler particles;
the cement mortar comprises the following raw materials in parts by weight: 90-110 parts of cement, 650-800 parts of modified sand, 10-15 parts of gypsum, 10-20 parts of filler, 45-55 parts of water and 3.2-4 parts of water reducer; the modified sand is prepared by modifying sand stone mixed by quartz sand and medium sand by triethylene tetramine;
the filler is prepared by the following method:
uniformly spraying a polyvinyl alcohol solution on the surface of the carbon fiber, wherein the mass ratio of the carbon fiber to the polyvinyl alcohol solution is 1:0.25-0.5, then spraying zirconium dioxide, the mass ratio of the carbon fiber to the zirconium dioxide is 1:1-2, and drying to obtain the zirconium dioxide modified carbon fiber;
uniformly spraying a polyvinyl alcohol solution on the surface of the carbon fiber, wherein the mass ratio of the carbon fiber to the polyvinyl alcohol solution is 1:0.25-0.5, uniformly spraying carbon nitride, wherein the mass ratio of the carbon fiber to the carbon nitride is 1:1-2, and drying to obtain the carbon nitride modified carbon fiber;
uniformly mixing the zirconium dioxide modified carbon fiber and the carbon nitride modified carbon fiber according to the mass ratio of 0.5-2:1 to obtain the filler.
2. The method for plugging an underground concrete according to claim 1, wherein the particle size of the sodium polyacrylate particles is 10-40 μm and the particle size of the magnesium oxide particles is 40-120nm.
3. The method for plugging the underground concrete according to claim 1, wherein the polyethylene glycol ethanol solution is prepared by dissolving polyethylene glycol 1000 in absolute ethanol under stirring, and the concentration of the polyethylene glycol ethanol solution is 20-30%.
4. The method for plugging an underground concrete according to claim 1, wherein the modified sand is prepared by the following method:
weighing quartz sand and medium sand according to the mass ratio of 1:2-4, and uniformly mixing and stirring to obtain sand stone; and (3) placing the sand stone into triethylene tetramine solution for soaking and stirring, taking out the sand stone, and drying to obtain the modified sand.
5. The method for plugging an underground concrete according to claim 1, wherein the length of the carbon fiber in the zirconium dioxide modified carbon fiber is 3-5mm, and the grain size of the zirconium dioxide is 100-200 μm.
6. The method for plugging an underground concrete according to claim 1, wherein the carbon fiber length of the carbon nitride modified carbon fiber is 1-3mm, and the carbon nitride particle size is 10-50 μm.
7. The method for plugging an underground concrete according to claim 1, wherein the coating area of the polyurethane waterproof coating is 2-5 times the length and 2-5 times the width of the working groove.
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| CN113323440A (en) * | 2021-06-10 | 2021-08-31 | 上海凯顿百森建筑工程有限公司 | Concrete gap repairing and anti-seepage treatment method |
| CN113480267A (en) * | 2021-08-05 | 2021-10-08 | 高县卓越商品混凝土有限公司 | High-performance concrete applying machine-made sand and preparation method thereof |
| CN114933452A (en) * | 2022-05-24 | 2022-08-23 | 绍兴上虞南方普银混凝土有限公司 | Low-shrinkage commercial concrete and preparation method thereof |
| CN114956644A (en) * | 2022-05-24 | 2022-08-30 | 中冶武汉冶金建筑研究院有限公司 | Concrete crack self-repairing material and preparation method thereof |
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