CN112624694A - Expansion anti-crack fiber concrete and preparation method thereof - Google Patents
Expansion anti-crack fiber concrete and preparation method thereof Download PDFInfo
- Publication number
- CN112624694A CN112624694A CN202011520403.0A CN202011520403A CN112624694A CN 112624694 A CN112624694 A CN 112624694A CN 202011520403 A CN202011520403 A CN 202011520403A CN 112624694 A CN112624694 A CN 112624694A
- Authority
- CN
- China
- Prior art keywords
- parts
- fiber
- concrete
- crack
- epoxy resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000000835 fiber Substances 0.000 title claims abstract description 190
- 239000004567 concrete Substances 0.000 title claims abstract description 166
- 238000002360 preparation method Methods 0.000 title claims abstract description 52
- 239000002775 capsule Substances 0.000 claims abstract description 77
- 239000004734 Polyphenylene sulfide Substances 0.000 claims abstract description 66
- 229920000069 polyphenylene sulfide Polymers 0.000 claims abstract description 66
- 239000004576 sand Substances 0.000 claims abstract description 55
- 239000003822 epoxy resin Substances 0.000 claims abstract description 51
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- VOOLKNUJNPZAHE-UHFFFAOYSA-N formaldehyde;2-methylphenol Chemical compound O=C.CC1=CC=CC=C1O VOOLKNUJNPZAHE-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 239000004568 cement Substances 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 21
- 230000001070 adhesive effect Effects 0.000 claims abstract description 21
- IJVRPNIWWODHHA-UHFFFAOYSA-N 2-cyanoprop-2-enoic acid Chemical compound OC(=O)C(=C)C#N IJVRPNIWWODHHA-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000004830 Super Glue Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000000654 additive Substances 0.000 claims abstract description 11
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 238000001694 spray drying Methods 0.000 claims abstract description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 42
- 239000010881 fly ash Substances 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 32
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 31
- 239000011707 mineral Substances 0.000 claims description 31
- 239000000843 powder Substances 0.000 claims description 31
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 28
- 230000000694 effects Effects 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 239000001569 carbon dioxide Substances 0.000 claims description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 14
- 239000010941 cobalt Substances 0.000 claims description 14
- 229910017052 cobalt Inorganic materials 0.000 claims description 14
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 14
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000003995 emulsifying agent Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 13
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 12
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 12
- 229920000570 polyether Polymers 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 claims description 10
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000002074 melt spinning Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 239000004566 building material Substances 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 43
- 230000000052 comparative effect Effects 0.000 description 20
- 238000005336 cracking Methods 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- 239000011148 porous material Substances 0.000 description 10
- 230000001965 increasing effect Effects 0.000 description 8
- 238000009987 spinning Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000003825 pressing Methods 0.000 description 6
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000001587 sorbitan monostearate Substances 0.000 description 4
- 229940035048 sorbitan monostearate Drugs 0.000 description 4
- 235000011076 sorbitan monostearate Nutrition 0.000 description 4
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- -1 admixture Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 125000003006 2-dimethylaminoethyl group Chemical group [H]C([H])([H])N(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910021392 nanocarbon Inorganic materials 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000036318 Callitris preissii Species 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 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
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000005701 Tarchonanthus camphoratus Nutrition 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- GVXIVWJIJSNCJO-UHFFFAOYSA-L aluminum;calcium;sulfate Chemical compound [Al+3].[Ca+2].[O-]S([O-])(=O)=O GVXIVWJIJSNCJO-UHFFFAOYSA-L 0.000 description 1
- 238000010539 anionic addition polymerization reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 229920006333 epoxy cement Polymers 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007863 gel particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004180 red 2G Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006277 sulfonation reaction Methods 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/12—Multiple coating or impregnating
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/29—Frost-thaw resistance
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of building materials, and particularly discloses an expansion anti-crack fiber concrete and a preparation method thereof. The expansion crack-resistant fiber concrete comprises the following components in parts by weight: 280-360 parts of cement, 200-230 parts of river sand, 470-510 parts of artificial sand, 950-990 parts of gravel, 150-190 parts of water, 120-150 parts of admixture, 43-49.5 parts of additive, 30-50 parts of fiber capsule and 15-25 parts of accelerator; the fiber capsule is prepared by mixing and spray drying the following raw materials in parts by weight: 1-2 parts of polyphenylene sulfide fiber, 0.5-0.7 part of alpha-cyanoacrylate adhesive, 0.25-0.3 part of epoxy resin adhesive and 2-3 parts of o-cresol formaldehyde epoxy resin. The expansion anti-crack fiber concrete has the advantages that crack repair can be accelerated, repair time is shortened, and when the concrete is damaged again, the concrete still has high self-repair performance.
Description
Technical Field
The application relates to the field of building materials, in particular to expansion anti-crack fiber concrete and a preparation method thereof.
Background
Concrete is the most used building material in the world, but the brittle nature of the concrete makes the concrete have poor anti-cracking performance, and micro cracks are easy to generate during construction or long-term use, and the existence and expansion of the cracks influence the strength and durability of the concrete.
In order to reduce the influence of concrete cracking on the strength and durability of the concrete, the main form of concrete repair is post-repair or regular repair, and the main methods include 1, coating mortar on the surface and coating epoxy cement on the surface; 2. cement grouting and chemical grouting; and 3, reinforcing with steel bars, prestressing force reinforcing and the like are used, the maintenance modes mainly aim at visible cracks, and the micro cracks influencing strength and durability in concrete are difficult to repair all around in real time, so that the after repair or the regular repair cannot meet the current concrete repair requirement.
Besides traditional after-the-fact maintenance and regular maintenance, the concrete self-repairing technology is provided, namely unhydrated cementing material particles in concrete are exposed due to cracking and damage, water enters the interior of the concrete through cracks and hydrates with the cementing material, and the cracks are repaired.
In view of the above-mentioned related art, the inventors considered that when the internal cracks of the concrete are repaired by the hydration reaction of the unhydrated gel particles with water, the concrete cannot be repaired in a short time because it takes a long time for the cement to hydrate and form sufficient strength.
Disclosure of Invention
In order to accelerate crack repair of the expansive anti-crack fiber concrete and shorten repair time of the concrete, the application provides the expansive anti-crack fiber concrete and a preparation method thereof.
In a first aspect, the application provides an expansion anti-crack fiber concrete, which adopts the following technical scheme:
the expansion crack-resistant fiber concrete comprises the following components in parts by weight: 280-360 parts of cement, 200-230 parts of river sand, 470-510 parts of artificial sand, 950-990 parts of gravel, 150-190 parts of water, 120-150 parts of admixture, 43-49.5 parts of additive, 30-50 parts of fiber capsule and 15-25 parts of accelerator;
the fiber capsule is prepared by mixing and spray drying the following raw materials in parts by weight: 1-2 parts of polyphenylene sulfide fiber, 0.5-0.7 part of alpha-cyanoacrylate adhesive, 0.25-0.3 part of epoxy resin adhesive and 2-3 parts of o-cresol formaldehyde epoxy resin.
By adopting the technical scheme, as cement, broken stone, admixture, additive and the like are taken as base materials to prepare the expansive anti-crack fiber concrete, the additive has obvious water reducing effect, can improve the strength and the impermeability of the concrete, enables the concrete to have relatively proper air content, improves the construction performance of the concrete, and increases the waterproofness and the frost resistance of the concrete; the fiber capsule is prepared from raw materials such as o-cresol formaldehyde epoxy resin, polyphenylene sulfide fiber and the like, so that the fiber capsule has a repairing effect when concrete cracks, and the self-repairing process of the concrete is completed; the alpha-cyanoacrylate adhesive and the epoxy resin adhesive are wrapped on the surface of the polyphenylene sulfide fiber to form a fiber core, and then the o-cresol formaldehyde epoxy resin is wrapped on the fiber core to form a fiber capsule, because the o-cresol formaldehyde resin has high strength, but poor toughness and is brittle, when a concrete matrix is cracked under pressure, the o-cresol formaldehyde epoxy resin is cracked, the internal alpha-cyanoacrylate cementing agent contains cyano and carbonyl with strong electron-withdrawing property, when the outer surface capsule layer is cracked, and the alpha-cyanoacrylate cementing agent is contacted with water or an alkaline substance in the concrete, anionic polymerization can be carried out to realize bonding and curing of cracks, the curing speed is very high, the curing speed of the epoxy resin adhesive is moderate, but the bonding strength is high, the repairing effect of the concrete can be effectively improved, and the performance of the cured concrete is good, the epoxy resin adhesive can accelerate the curing speed of the epoxy resin adhesive by matching with the accelerator; and the polyphenylene sulfide fiber has high strength, high temperature resistance and flame retardance, and can enhance the compressive strength of concrete and improve the mechanical property of the concrete after being repaired in the self-repairing process of a concrete matrix.
Preferably, the preparation method of the fiber capsule comprises the following steps: dissolving o-cresol formaldehyde epoxy resin by using a dimethylformamide solution, adding an alpha-cyanoacrylate adhesive, an epoxy resin adhesive and polyphenylene sulfide fibers into the o-cresol formaldehyde epoxy resin, adding an emulsifier, carrying out ultrasonic dispersion for 20-30min, and carrying out spray drying to obtain a fiber capsule, wherein the spray pressure is 0.5-2MPa, the drying temperature is 150-160 ℃, and the preparation examples of the o-cresol formaldehyde epoxy resin, the dimethylformamide solution and the emulsifier are 1:0.4-0.6: 0.05-0.1.
By adopting the technical scheme, the o-cresol formaldehyde epoxy resin is dissolved by using the dimethylformamide and then is mixed with the rest substances, the mixed solution is atomized into tiny liquid drops through the atomizing nozzle, when the liquid drops are contacted with hot air, the dimethylformamide solution for dissolving the o-cresol formaldehyde epoxy resin is quickly evaporated, so that the o-cresol formaldehyde epoxy resin is solidified, the polyphenylene sulfide fiber, the alpha-cyanoacrylate adhesive and the epoxy resin adhesive are wrapped, and the fiber capsule is prepared.
Preferably, the preparation method of the polyphenylene sulfide fiber is as follows: according to the parts by weight, carrying out melt spinning on 2-5 parts of polyphenylene sulfide particles, 1-3 parts of EEA particles, 0.5-1 part of sugar filter mud and 1-2 parts of supercritical carbon dioxide to prepare blended fibers; adding 1.5-2 parts of cobalt, 2-4 parts of nano titanium dioxide and 1-3 parts of methyl methacrylate into the blended fiber, performing ultrasonic dispersion for 30-60min, and drying to obtain the polyphenylene sulfide fiber.
By adopting the technical scheme, the polyphenylene sulfide fiber is used as a main raw material for increasing the compressive strength of the concrete after self-repairing, but the polyphenylene sulfide fiber has high strength, low toughness, brittleness and easy fracture, and after the concrete is firstly damaged under pressure and the fiber capsule exerts the repairing effect and the concrete is damaged under pressure again, the polyphenylene sulfide fiber is easy to fracture and the compressive strength of the concrete is not easy to repair; EEA resin is one of polyolefine with the largest toughness and flexibility, has higher stability and strength, polyphenylene sulfide fiber is prepared by mixing polyphenylene sulfide particles and EEA particles, the performances of the polyphenylene sulfide fiber and the EEA particles are complementary, the flexibility of the polyphenylene sulfide fiber can be improved, the EEA resin and the polyphenylene sulfide are mixed and melted, supercritical carbon dioxide and sugar filter mud with calcium carbonate as a main component are used as pore-forming agents, in the process of preparing the polyphenylene sulfide fiber, the sugar filter mud forms carbon dioxide at high temperature, tiny pores are formed on the surface of the polyphenylene sulfide fiber, the polyphenylene sulfide fiber with the tiny pores is mixed with cobalt and nano titanium dioxide with high strength and high hardness, the cobalt and the nano titanium dioxide are loaded in the tiny pores of the polyphenylene sulfide, finally methyl methacrylate is used for increasing the binding force among the cobalt, the nano titanium dioxide and the polyphenylene sulfide, and the methyl methacrylate can also be filled in the pores of the polyphenylene sulfide, when the polyphenylene sulfide fiber is broken under pressure, the adhesive force among concrete cracks can be increased, so that the repairing effect is achieved; when the concrete matrix is pressed and broken again, the cobalt and the nano titanium dioxide filled in the polyphenylene sulfide fibers can play a role in enhancing the compressive strength of the concrete, and the methyl methacrylate can bond concrete cracks to play a role in repairing the concrete cracks.
Preferably, the accelerator is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol, bis- (2-dimethylaminoethyl) ether and polyether N210 according to the mass ratio of 1:1-1.5: 0.4-0.7.
By adopting the technical scheme, the 2,4, 6-tris (dimethylaminomethyl) phenol can reduce the curing temperature, shorten the curing time, promote curing and improve the curing speed, is mixed with the polyether N210 for use to promote curing and further improve the curing speed, and the bis- (2-dimethylaminoethyl) ether has good curing effect and high speed, is matched with the polyether N210, can promote the epoxy resin adhesive and the alpha-cyanoacrylate adhesive to absorb water in the air to promote the polymerization of a monomer, thereby accelerating the curing speed.
Preferably, the fiber capsule has a length of 20-25mm and a diameter of 3-6 mm.
By adopting the technical scheme, the pipe diameter of the fiber capsule is too thick, the pipe wall is too thin, the concrete matrix is not cracked, the capsule is damaged, and the aim of repairing can not be achieved, and the thickness, the wall thickness and the length of the capsule have certain influence on the macroscopic performance of concrete.
Preferably, the admixture comprises 9-9.5 parts by weight of DH-1 type high-efficiency waterproof water reducing agent, 26-30 parts by weight of SY-K high-performance expansion crack-resistant agent and 8-10 parts by weight of SY-G high-efficiency crack-resistant waterproof agent.
By adopting the technical scheme, the DH-1 high-efficiency waterproof water reducing agent is prepared by using coal tar washing oil as a main raw material and performing sulfuric acid sulfonation, formaldehyde condensation and sodium hydroxide neutralization, the SY-K high-performance expansion crack-resistant agent has the common advantages of micro-expansion performance and crack-resistant fibers, and simultaneously has a super-stack effect of high crack resistance and high impermeability, the SY-G high-efficiency crack-resistant waterproof agent has high expansion rate and low slump loss, can compensate the self-contraction of the concrete at the initial hardening stage, reduces the contraction drop and achieves the aims of effectively resisting and preventing seepage.
Preferably, the admixture comprises fly ash and mineral powder, and the mass ratio of the mineral powder to the fly ash is 2.75-3: 0.7.
By adopting the technical scheme, the active ingredients of the fly ash are silicon dioxide and aluminum oxide, and after the fly ash is mixed with cement and water, a stable cementing material can be generated, so that the concrete has high strength; the mineral powder mineral admixture has a plurality of comprehensive effects such as an activity effect, an interface effect, a micro-filling effect and a water reducing effect, and the fly ash and the mineral powder as the admixtures can improve the pore structure of the concrete and improve the compressive strength of the concrete.
Preferably, the fly ash is F-class II-grade fly ash, the fineness (the screen residue of a 45-micron square-hole screen) is less than or equal to 12 percent, the water demand ratio is 95-98 percent, the loss on ignition is less than or equal to 4.5 percent, the mineral powder is S95-grade mineral powder, and the specific surface area of the mineral powder is 400-450 m-2Kg, 28 days activity index 95%, fluidity 99%.
By adopting the technical scheme, more than 70% of particles in the fly ash are amorphous spherical glass bodies, the ball bearing effect is mainly achieved, the lubricating effect is achieved in the concrete mixture, the workability of the concrete mixture is improved, the fly ash and broken stones and the like form reasonable grading, the fly ash and the broken stones are mutually filled, the compactness of the concrete can be effectively increased, and the compressive strength of the concrete is further improved; the mineral powder admixture can improve rheological property, reduce hydration heat, reduce slump loss and reduce segregation and bleeding, and can also improve the pore structure and mechanical property of a concrete structure and improve later strength and durability.
Preferably, the river sand and the artificial sand are both sand in the II area, the fineness modulus is 2.9-3.0, the mud content of the river sand is 1.6%, the mud content of the artificial sand is 3.6%, the crushed stone is 5-31.5mm continuous gradation, and the mud content is 0.3-0.5%.
By adopting the technical scheme, the river sand has high hardness and good wear resistance, the content of clay and other harmful impurities is low, the strength of the concrete is high, the fineness modulus of the river sand and the artificial sand is proper, the concrete has better workability, the construction workability is good, the concrete is easy to stir, and the concrete can be filled in the pores between the broken stones, so that the compactness and the strength of the concrete are improved, the porosity in the concrete is reduced, the segregation and bleeding of the concrete are reduced, and the strength of the concrete is improved; the mud content in the stones is appropriate, the strength of the concrete can be effectively improved, the particles are prevented from being large, the pores among the aggregates are large, the strength of the concrete is low, reasonable grading is formed between the aggregates and river sand and fly ash, the compactness of the concrete can be improved, and the strength and the waterproofness of the concrete are improved.
In a second aspect, the application provides a preparation method of an expansion anti-crack fiber concrete, which adopts the following technical scheme: the preparation method of the expansion crack-resistant fiber concrete comprises the following steps:
s1, weighing cement, river sand, artificial sand, an admixture, broken stone, water, an admixture, a fiber capsule and an accelerator according to the proportion of the components;
s2, mixing and stirring cement, river sand, gravel, artificial sand, an admixture and an accelerant for 2-5 min;
s3, adding the fiber capsule into the mixture obtained in the step S2, and stirring for 1-3 min;
and S4, uniformly mixing the DH-3 type high-efficiency water reducing agent and water, adding the mixture obtained in the step S3, and stirring for 2-5min to obtain the expansive anti-crack fiber concrete.
By adopting the technical scheme, the cement, the broken stone, the river sand, the admixture and the accelerant are uniformly mixed, and the fiber capsule is added, so that the fiber capsule can be uniformly dispersed in the concrete matrix, and the repairing effect of the concrete matrix is improved.
In summary, the present application has the following beneficial effects:
1. because the polyphenylene sulfide fiber, the alpha-cyanoacrylate adhesive, the epoxy resin adhesive and the o-cresol formaldehyde epoxy resin are used as raw materials for preparing the fiber capsule, the curing speed of the alpha-cyanoacrylate adhesive is high, the time for healing a concrete crack can be shortened, the repairing speed is accelerated, the epoxy resin adhesive is matched with the accelerator, the healing of the concrete crack can be further accelerated, the o-cresol formaldehyde epoxy resin is high in hardness and high in brittleness, when a concrete matrix is compressed, the fiber capsule can be rapidly broken, the repairing effect is exerted, the polyphenylene sulfide fiber is high in hardness and high in strength, and the compressive strength of concrete is improved in the self-repairing process of the concrete.
2. The preparation method preferably adopts spray drying to prepare the fiber capsule, and is simple and easy to operate because the dimethylformamide solution is used for dissolving the o-cresol formaldehyde epoxy resin, and then the rest substances are added into the o-cresol formaldehyde epoxy resin, and due to the thermal evaporation effect, the dimethylformamide is volatilized, the o-cresol formaldehyde epoxy resin is solidified, and the polyphenylene sulfide fiber and other components are wrapped to form the fiber capsule.
3. The polyphenylene sulfide fiber is prepared from the polyphenylene sulfide particles, the EEA particles, the sugar filter mud, the supercritical carbon dioxide and other components, the mechanical property of the polyphenylene sulfide fiber is improved by the high toughness of the EEA, the polyphenylene sulfide fiber is flexible and not easy to break, the damage rate of concrete after being stressed again is reduced, the sugar filter mud and the supercritical carbon dioxide are used as pore-forming agents, tiny pores are formed on the surface of the polyphenylene sulfide fiber, and then cobalt, nano titanium dioxide and methyl methacrylate are loaded on the surface and in the pores of the polyphenylene sulfide fiber, so that the repair rate of concrete when being stressed and damaged again is improved, and the compressive strength of the concrete after being self-repaired again is increased.
Detailed Description
Preparation examples 1 to 10 of fiber capsules
The o-cresol formaldehyde epoxy resin in preparation examples 1 to 10 is selected from Fudakang chemical materials Co.Ltd, Changsha, and has a model of CYDCN-200; the alpha-cyanoacrylate adhesive is selected from Qinzi Intelligent science and technology Limited of Shanghai He, with model number HZ 701; the epoxy resin adhesive is selected from the Jinan Yisheng resin Co., Ltd, and the model is E-128; the polyphenylene sulfide fiber is selected from Jiacheng fiber of Taian city, the goods number is T436; sorbitan monostearate, and polyoxyethylene octylphenol ether selected from Jiangsu Maoheng chemical Co., Ltd, model number is OP-40; EEA particles are selected from Camphor wood of Dongguan city from Jinyuanlai plastic material Ministry of trade, and the trade mark is 4700; the polyphenylene sulfide particles are selected from Shanghai plastic-rubber company Limited and have the model number of P2020A; the methyl methacrylate is selected from Jinan Hua L chemical Co., Ltd, and has a model number of 2-2.
Preparation example 1: dissolving 2kg of o-cresol formaldehyde epoxy resin by using a dimethylformamide solution, adding 0.5kg of alpha-cyanoacrylate adhesive, 0.25kg of epoxy resin adhesive and 1kg of polyphenylene sulfide fiber into the o-cresol formaldehyde epoxy resin, adding an emulsifier, carrying out ultrasonic dispersion for 20min, and carrying out spray drying to obtain a fiber capsule, wherein the spray pressure is 0.5MPa, the drying temperature is 160 ℃, the preparation examples of the o-cresol formaldehyde epoxy resin, the dimethylformamide solution and the emulsifier are 1:0.4:0.05, and the emulsifier is prepared by mixing octyl phenol polyoxyethylene ether and sorbitan monostearate according to the mass ratio of 1: 0.5.
Preparation example 2: dissolving 2.5kg of o-cresol formaldehyde epoxy resin by using a dimethylformamide solution, adding 0.6kg of alpha-cyanoacrylate adhesive, 0.28kg of epoxy resin adhesive and 1.5kg of polyphenylene sulfide fiber into the o-cresol formaldehyde epoxy resin, adding an emulsifier, carrying out ultrasonic dispersion for 25min, and carrying out spray drying to obtain a fiber capsule, wherein the spray pressure is 1MPa, the drying temperature is 150 ℃, the preparation examples of the o-cresol formaldehyde epoxy resin, the dimethylformamide solution and the emulsifier are 1:0.5:0.07, and the emulsifier is prepared by mixing octyl phenol polyoxyethylene ether and sorbitan monostearate according to the mass ratio of 1: 0.6.
Preparation example 3: dissolving 3kg of o-cresol formaldehyde epoxy resin by using a dimethylformamide solution, adding 0.7kg of alpha-cyanoacrylate adhesive, 0.3kg of epoxy resin adhesive and 2kg of polyphenylene sulfide fiber into the o-cresol formaldehyde epoxy resin, adding an emulsifier, carrying out ultrasonic dispersion for 20min, and carrying out spray drying to obtain a fiber capsule, wherein the spray pressure is 2MPa, the drying temperature is 150 ℃, the preparation examples of the o-cresol formaldehyde epoxy resin, the dimethylformamide solution and the emulsifier are 1:0.6:0.1, and the emulsifier is prepared by mixing octyl phenol polyoxyethylene ether and sorbitan monostearate according to the mass ratio of 1: 0.7.
Preparation example 4: the polyphenylene sulfide fibers were pretreated as follows, which is different from preparation example 1: carrying out melt spinning on 2kg of polyphenylene sulfide particles, 1kg of EEA particles, 0.5kg of sugar filter mud and 1kg of supercritical carbon dioxide to prepare blended fibers,spinning at 310 deg.C at a speed of 50m/min, a spinneret orifice diameter of 0.7mm, a drawing temperature of 90 deg.C, a setting temperature of 160 deg.C for 8min, a supercritical carbon dioxide feeding temperature of 30 deg.C, a pressure of 16MPa, and an output flow of 0.1 mL/min; adding 1.5kg of cobalt, 2kg of nano titanium dioxide and 1kg of methyl methacrylate into the blend fiber, performing ultrasonic dispersion for 30min, and drying to obtain the polyphenylene sulfide fiber, wherein the performance parameters of EEA particles are shown in Table 1, the performance parameters of the polyphenylene sulfide particles are shown in Table 1, and the sugar filter mud comprises the following main components: SiO 22，1.52％；Fe2O3,0.26％；Al2O3，0.3％；CaO，42.83％；MgO，2.73％；Cl-，0.014％；Na2O，0.15％；SO3，2.83％；K2O，0.14％。
TABLE 1 Performance parameters of EEA particles and polyphenylene sulfide particles
Preparation example 5: the polyphenylene sulfide fibers were pretreated as follows, which is different from preparation example 1: carrying out melt spinning on 3.5kg of polyphenylene sulfide particles, 2kg of EEA particles, 0.8kg of sugar filter mud and 1.5kg of supercritical carbon dioxide to prepare blended fibers, wherein the spinning temperature is 340 ℃, the spinning speed is 50m/min, the diameter of a spinneret orifice is 0.7mm, the stretching temperature is 100 ℃, the setting temperature is 200 ℃, the time is 6min, the temperature for adding the supercritical carbon dioxide into a spinning machine is 50 ℃, the pressure is 11MPa, and the output flow is 10 mL/min; adding 1.8kg of cobalt, 3kg of nano titanium dioxide and 2kg of methyl methacrylate into the blended fiber, performing ultrasonic dispersion for 45min, and drying to obtain the polyphenylene sulfide fiber, wherein the performance parameters of EA particles are shown in Table 1, the performance parameters of the polyphenylene sulfide particles are shown in Table 1, and the sugar filter mud comprises the following main components: SiO 22，1.52％；Fe2O3,0.26％；Al2O3，0.3％；CaO，42.83％；MgO，2.73％；Cl-，0.014％；Na2O，0.15％；SO3，2.83％；K2O，0.14％。
Preparation example 6: the polyphenylene sulfide fibers were pretreated as follows, which is different from preparation example 1: carrying out melt spinning on 5kg of polyphenylene sulfide particles, 3kg of EEA particles, 1kg of sugar filter mud and 2kg of supercritical carbon dioxide to prepare blended fibers, wherein the spinning temperature is 290 ℃, the spinning speed is 50m/min, the diameter of a spinneret orifice is 0.7mm, the stretching temperature is 120 ℃, the setting temperature is 260 ℃, the time is 5min, the temperature for adding the supercritical carbon dioxide into a spinning machine is 70 ℃, the pressure is 7MPa, and the output flow is 20 mL/min; adding 2kg of cobalt, 4kg of nano titanium dioxide and 3kg of methyl methacrylate into the blended fiber, performing ultrasonic dispersion for 60min, and drying to obtain the polyphenylene sulfide fiber, wherein the performance parameters of EA particles are shown in table 1, the performance parameters of the polyphenylene sulfide particles are shown in table 1, and the sugar filter mud comprises the following main components: SiO 22，1.52％；Fe2O3,0.26％；Al2O3，0.3％；CaO，42.83％；MgO，2.73％；Cl-，0.014％；Na2O，0.15％；SO3，2.83％；K2O，0.14％。
Preparation example 7: the difference from preparation 4 is that no EEA particles are added.
Preparation example 8: the difference from preparation example 4 is that sugar sludge and supercritical carbon dioxide were not added.
Preparation example 9: the difference from preparation example 4 is that cobalt and nano titania are not added.
Preparation example 10: the difference from preparation example 4 is that methyl methacrylate was not added.
Examples
The cement in the following examples and comparative examples was selected from the sunshine kyowa new building materials ltd; the Z6060 accelerant is selected from Guangzhou Aike new material trade; the DH-1 type high-efficiency water reducing agent is selected from Qingdao Donghong spinning machine company Limited; the SY-K high-performance expansion anti-cracking agent and the SY-G high-efficiency anti-cracking waterproof agent are both selected from Wuhan three-source special building materials GmbH; the S95-grade mineral powder is selected from Qingdao Mirabilite Macro-remote Industrial trade company, Inc.; selecting a cloud crossing building material center in a yellow island area of the Qingdao by using crushed stones; river sand is selected from Chang Yu building material center in Qingdao yellow island area; the artificial sand is selected from waste disposal points of the Wulian xingsheng industry; the macadam is selected from a cloud crossing building material center in a Qingdao yellow island region; the 2,4, 6-tri (dimethylaminomethyl) phenol is selected from the group consisting of Mingri chemical technology, Inc. of Wuxi; the bis- (2-dimethylaminoethyl) ether is selected from Weimen chemical company Limited in Weifang City, with CAS number of 3033-62-3; polyether N210 is selected from Santana chemical industry (Nantong) Inc. with model number N-210.
Example 1: the raw material formulation of the expansive anti-crack fiber concrete is shown in Table 3, and the preparation method of the expansive anti-crack fiber concrete comprises the following steps:
s1, weighing 322kg of cement, 211kg of river sand, 492kg of artificial sand, 138kg of admixture, 971kg of crushed stone, 170kg of water, 46.2kg of admixture, 30kg of fiber capsule and 15kg of accelerator according to the proportion of the components, wherein the accelerator is an epoxy resin adhesive accelerator with the model number of Z6040;
s2, mixing and stirring cement, river sand, gravel, artificial sand, an admixture and an accelerant for 2min, wherein the cement is P.O42.5 Portland cement, the river sand and the artificial sand are both sands in a region II, the fineness modulus is 2.9, the mud content of the river sand is 1.6%, the mud content of the artificial sand is 3.6%, the gravel is 5-31.5mm continuous gradation, the mud content is 0.3%, the admixture comprises fly ash and mineral powder, the mass ratio of the mineral powder to the fly ash is 2.75:0.7, the mineral powder is S95-level mineral powder, and the specific surface area of the mineral powder is 400m2The activity index of 28 days is 95%, the fluidity ratio is 99%, the fly ash is F class II fly ash, the fineness (45 mu m square hole sieve residue) of the fly ash is less than or equal to 12%, the water demand ratio is 95%, and the ignition loss is less than or equal to 4.5%;
s3, adding fiber capsules into the mixture obtained in the step S2, and stirring for 1min, wherein the fiber capsules are prepared from the preparation example 1 of the fiber capsules, and the length of the fiber capsules is 20mm, and the diameter of the fiber capsules is 3 mm;
s4, uniformly mixing an additive and water, adding the mixture into the mixture obtained in the step S3, and stirring for 2min to obtain the expansive anti-cracking fiber concrete, wherein the additive comprises 9.2kg of DH-1 type efficient waterproof water reducing agent, 28kg of SY-K high-performance expansive anti-cracking agent and 9kg of SY-G efficient anti-cracking waterproof agent.
Table 3 raw material ratio of expansive crack-resistant fiber concrete in example
Example 2: the difference between the expanded anti-crack fiber concrete and the embodiment 1 is that the raw material formulation is shown in Table 3, and the preparation method of the expanded anti-crack fiber concrete comprises the following steps:
s1, weighing 280kg of cement, 190kg of river sand, 120kg of admixture, 950kg of macadam, 150kg of water, 43kg of admixture, 35kg of fiber capsule and 18kg of accelerant according to the proportion of the components, wherein the accelerant is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol, bis- (2-dimethylaminoethyl) ether and polyether N210 in a mass ratio of 1:1: 0.4;
s2, mixing and stirring cement, river sand, gravel, artificial sand, an admixture and an accelerant for 4min, wherein the cement is P.O42.5 Portland cement, the river sand and the artificial sand are both sands in a II area, the fineness modulus is 3.0, the mud content of the river sand is 1.6%, the mud content of the artificial sand is 3.6%, the gravel is 5-31.5mm continuous gradation, the mud content is 0.4%, the admixture comprises fly ash and mineral powder, the mass ratio of the mineral powder to the fly ash is 2.9:0.7, the mineral powder is S95-level mineral powder, and the specific surface area of the mineral powder is 430m2The activity index of 28 days is 95%, the fluidity ratio is 99%, the fly ash is F class II fly ash, the fineness (the screen residue of a square-hole screen with the size of 45 mu m) of the fly ash is less than or equal to 12%, the water demand ratio is 98%, and the ignition loss is less than or equal to 4.5%;
s3, adding fiber capsules into the mixture obtained in the step S2, and stirring for 2min, wherein the fiber capsules are prepared from the preparation example 2 of the fiber capsules, and the length of the fiber capsules is 23mm, and the diameter of the fiber capsules is 5 mm;
s4, uniformly mixing an additive and water, adding the mixture into the mixture obtained in the step S3, and stirring for 4min to obtain the expansive anti-crack fiber concrete, wherein the additive comprises 9kg of DH-1 type efficient waterproof water reducing agent, 26kg of SY-K high-performance expansive anti-crack agent and 8kg of SY-G efficient anti-crack waterproof agent.
Example 3: the difference between the expanded anti-crack fiber concrete and the embodiment 1 is that the raw material formulation is shown in Table 3, and the preparation method of the expanded anti-crack fiber concrete comprises the following steps:
s1, weighing 300kg of cement, 200kg of river sand, 480kg of artificial sand, 130kg of admixture, 9600kg of crushed stone, 160kg of water, 46.4kg of admixture, 40kg of fiber capsule and 20kg of accelerator according to the proportion of the components, wherein the accelerator is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol, bis- (2-dimethylaminoethyl) ether and polyether N210 in a mass ratio of 1:1.3: 0.6;
s2, mixing and stirring cement, river sand, gravel, artificial sand, an admixture and an accelerant for 5min, wherein the cement is P.O42.5 Portland cement, the river sand and the artificial sand are both sands in a region II, the fineness modulus is 3.0, the mud content is 1.6%, the mud content of the artificial sand is 3.6%, the gravel is 5-31.5mm continuous gradation, the mud content is 0.5%, the admixture comprises fly ash and mineral powder, the mass ratio of the mineral powder to the fly ash is 3:0.7, the mineral powder is S95-grade mineral powder, and the specific surface area of the mineral powder is 450m2The activity index of 28 days is 95%, the fluidity ratio is 99%, the fly ash is F class II fly ash, the fineness (the screen residue of a square-hole screen with the size of 45 mu m) of the fly ash is less than or equal to 12%, the water demand ratio is 98%, and the ignition loss is less than or equal to 4.5%;
s3, adding fiber capsules into the mixture obtained in the step S2, and stirring for 3min, wherein the fiber capsules are prepared from the preparation example 3 of the fiber capsules, and the length of the fiber capsules is 25mm, and the diameter of the fiber capsules is 6 mm;
s4, uniformly mixing an additive and water, adding the mixture into the mixture obtained in the step S3, and stirring for 5min to obtain the expansive anti-cracking fiber concrete, wherein the additive comprises 9.4kg of DH-1 type efficient waterproof water reducing agent, 28kg of SY-K high-performance expansive anti-cracking agent and 9kg of SY-G efficient anti-cracking waterproof agent.
Example 4: an expansive crack-resistant fiber concrete is different from the concrete in example 1 in that a fiber capsule is prepared from preparation example 4 of the fiber capsule, and an accelerant is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol, bis- (2-dimethylaminoethyl) ether and polyether N210 in a mass ratio of 1:1.5: 0.7;
example 5: an expansive crack-resistant fiber concrete, which is different from example 1 in that a fiber capsule is prepared from preparation example 5 of the fiber capsule.
Example 6: an expansive crack-resistant fiber concrete, which is different from example 1 in that a fiber capsule is prepared from preparation example 6 of the fiber capsule.
Example 7: an expansive crack-resistant fiber concrete, which is different from example 1 in that a fiber capsule is prepared from preparation example 7 of the fiber capsule.
Example 8: an expansive crack-resistant fiber concrete, which is different from example 1 in that a fiber capsule is prepared from preparation example 8 of the fiber capsule.
Example 9: an expansive crack-resistant fiber concrete, which is different from example 1 in that a fiber capsule is prepared from preparation example 9 of the fiber capsule.
Example 10: an expansive crack-resistant fiber concrete, which is different from example 1 in that a fiber capsule is prepared from preparation example 10 of the fiber capsule.
Example 11: an expansive crack-resistant fiber concrete is different from that in example 1 in that an accelerator is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol and bis- (2-dimethylaminoethyl) ether in a mass ratio of 1:1, and a fiber capsule is prepared by preparation example 4.
Example 12: an expansive crack-resistant fiber concrete is different from that in example 1 in that an accelerator is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol and polyether N210 in a mass ratio of 1:0.4, and a fiber capsule is prepared by preparation example 4.
Comparative example
Comparative example 1: an expansive crack-resistant fiber concrete, which is different from the concrete in example 1 in that no fiber capsule is added.
Comparative example 2: an expansive crack-resistant fiber concrete, which is different from that of example 1 in that no accelerator is added.
Comparative example 3: an expansive crack-resistant fiber concrete, which is different from example 1 in that no alpha-cyanoacrylate adhesive is added when preparing a fiber capsule.
Comparative example 4: an expansive crack-resistant fiber concrete, which is different from example 1 in that no epoxy resin adhesive is added when preparing fiber capsules.
Comparative example 5: an expansion anti-crack fiber concrete and a preparation method thereof, comprising the following steps:
a) 138kg/m first3Sand, 220kg/m3Pebbles and 38kg/m3Adding water into the stirrer at the same time, and stirring for 10 s;
b) then sequentially adding 80kg/m33kg/m of cement3Aluminum calcium sulfate expanding agent, 22kg/m3Fly ash and 20kg/m3Stirring the mineral powder for 20 s;
c) 38kg/m of the raw materials are sequentially charged3Water and 1.6kg/m3Stirring the water reducing agent for 20 s;
d) finally, 0.19kg/m of the powder is put into the reactor3The modified polypropylene fiber was stirred for 40 seconds.
Comparative example 6: the anti-cracking self-repairing concrete is prepared by uniformly mixing 500kg of cement, 78g of fly ash, 479g of sand, 1231kg of pebble, 190kg of water and 2.3kg of concrete anti-cracking self-repairing agent through the following steps: adding 35kg of calcium sulphoaluminate, 0.1kg of magnesium aluminum silicate thixotropic agent, 0.3kg of polyvinyl alcohol fiber, 1kg of nano carbon black, 2kg of glucose and 3kg of casein into a stirrer, and uniformly mixing and stirring to obtain the nano carbon black.
Performance test
Concrete was prepared according to the methods of examples and comparative examples, and cured for 28 days under standard conditions, and the compressive strength F of the concrete test pieces prepared in examples and comparative examples was examined1Then, the concrete test block is prepressed and damaged (the prepressing value is 60 percent of the compressive strength), and then the compressive strength F of each test block after prepressing and damage is detected2Then, the damaged test block is subjected to steam oxidation at 50 ℃, maintained for 1 to 3 days, and the compressive strength F of the concrete test block is detected when the concrete test block is repaired for 1 day, 2 days and 3 days3And calculating the compressive strength restoration rate of each concrete test block: w1(％)＝(F3-F2)/F2X is 100%; 10 concrete test blocks are taken in each embodiment or comparative example, the average value of the 10 concrete test blocks is taken as the detection result, and the detection result is recorded in table 4; mixing the mixture after the pre-pressing is damaged and the mixture is cured for 3 daysPrepressing and damaging the concrete test block again (the prepressing value is 60 percent of the compressive strength), detecting the compressive strength F4 after prepressing and damaging, curing the damaged test block at 50 ℃ for 3 days, detecting the compressive strength F5 after curing for 3 days, and calculating the compressive strength repair rate of the concrete test block: w2＝(F5-F4)/F4×100％。
TABLE 4 detection results of the expansive crack-resistant fiber concrete properties
As can be seen by combining the data in examples 1-4 and Table 4, the use of the commercially available epoxy resin accelerator in example 1 in combination with the fiber capsule can accelerate the repair of concrete, so that the repair rate of the concrete reaches 10.8% after the concrete is damaged and cured for 3 days; in examples 2 to 4, the accelerator is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol, bis- (2-dimethylaminoethyl) ether and polyether N210, and compared with example 1, the repair speed of the concrete is obviously increased, which can reach 9.9 to 11.5% in day 1, and is obviously improved compared with example 1.
The polyphenylene sulfide fibers in the fiber capsules incorporated in the examples 4 to 6 are made of EEA particles, sugar filter mud and the like, and the detection results show that the concrete prepared in the examples 4 to 6 can be quickly repaired after being pre-pressed and damaged, the compressive strength can reach 11.2 to 11.5 percent in day 1, and the repair rate of the concrete is not obviously increased in days 2 to 3, which indicates that the repair speed of the compressive strength of the concrete is high; in the embodiments 4 to 6, the polyphenylene sulfide fibers are made of the EEA particles, the nano titanium dioxide and the like, so that the polyphenylene sulfide fibers still have a good self-repairing effect when the concrete is subjected to self-repairing after being pre-pressed and damaged and is damaged and then is pressed and damaged again, and the repairing rate can reach 10.7 to 11.3 percent on the 3 rd day of maintenance.
In example 7, because EEA particles are not added when preparing the polyphenylene sulfide fibers, the concrete prepared in example 7 can be quickly repaired after being damaged by first prepressing, but the repair rate is low and the self-repairing performance is reduced after being damaged by second prepressing.
In example 8, since sugar filter mud and supercritical carbon dioxide were not added, much cobalt and nano titanium dioxide could not be loaded on the polyphenylene sulfide fibers, and it is known from the detection results that the self-repairing performance of the concrete was reduced after being damaged by the compressive force again, compared with examples 4 to 6, although the concrete had a fast first pre-pressing damage repairing rate.
In example 9, because cobalt and nano titanium dioxide are not added when the polyphenylene sulfide fiber is prepared, the amount of cobalt and nano titanium dioxide with high hardness on the polyphenylene sulfide fiber is small, and it can be known from the detection result that the concrete prepared in example 9 can complete self-repairing in a short time after being damaged by first pre-pressing, and the self-repairing capability of the concrete is reduced after being pressed again.
In the embodiment 10, methyl methacrylate is not added when polyphenylene sulfide is prepared, the concrete prepared in the embodiment 10 has good self-repairing effect and high repairing speed after being pre-pressed and damaged for the first time, and after being pressed again, the concrete is damaged, the self-repairing capability is reduced, and the repairing rate is reduced.
In example 11, since polyether N210 was not added to the accelerator, the test results showed that the compressive strength restoration rate of the concrete sample was low on day 1 of curing the damaged concrete, and the restoration rate in examples 1 to 3 was not reached on day 3 of curing, indicating that polyether N210 can accelerate the restoration rate of the concrete.
In example 12, bis- (2-dimethylaminoethyl) in the accelerator was not added, and the repair rate was 9.2% on the 3 rd day of curing after the concrete had been damaged by pre-compaction, while the repair rate was 12.5% on the 1 st day in example 2, which indicates that bis- (2-dimethylaminoethyl) was effective in increasing the self-repair rate of concrete.
Comparative example 1 since no fiber capsule was added, it can be seen from the data in table 4 that the compressive strength of the concrete prepared in comparative example 1 was not repaired and no repairing effect was obtained after curing for 1 to 3 days after the concrete was damaged by pre-compaction.
Compared with the prior art, the concrete repair method has the advantages that the repair effect of the concrete after the damage of the first pre-pressing is slower because no accelerator is added, and the self-repair effect is poorer when the concrete is stressed and damaged again after the damage of the first pre-pressing is realized.
In the comparative example 3, the alpha-cyanoacrylate adhesive is not added in the fiber capsule, and in the comparative example 4, the epoxy resin adhesive is not added in the fiber capsule, so that the concrete prepared in the comparative examples 3 to 4 has a low self-repairing speed after being damaged by first pre-pressing and has poor self-repairing performance after being damaged by being pressed again.
Comparative examples 5 and 6 are expansive crack-resistant fiber concrete prepared in the prior art, the self-recovery performance of the concrete prepared in comparative examples 5 to 6 is poor, the repair rate of the concrete prepared in comparative examples 5 and 6 is 3.5% and 1.6% respectively on day 1, the repair rate suddenly increases to 8.0 to 8.9% on day 3, and the repair rate is high on day 3, so that the repair rate of the concrete prepared in comparative examples 5 and 6 is slow.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The expansion anti-crack fiber concrete is characterized by comprising the following components in parts by weight: 280-360 parts of cement, 200-230 parts of river sand, 470-510 parts of artificial sand, 950-990 parts of gravel, 150-190 parts of water, 120-150 parts of admixture, 43-49.5 parts of additive, 30-50 parts of fiber capsule and 15-25 parts of accelerator;
the fiber capsule is prepared by mixing and spray drying the following raw materials in parts by weight: 1-2 parts of polyphenylene sulfide fiber, 0.5-0.7 part of alpha-cyanoacrylate adhesive, 0.25-0.3 part of epoxy resin adhesive and 2-3 parts of o-cresol formaldehyde epoxy resin.
2. The expanded crack-resistant fiber concrete according to claim 1, wherein: the preparation method of the fiber capsule comprises the following steps: dissolving o-cresol formaldehyde epoxy resin by using a dimethylformamide solution, adding an alpha-cyanoacrylate adhesive, an epoxy resin adhesive and polyphenylene sulfide fibers into the o-cresol formaldehyde epoxy resin, adding an emulsifier, carrying out ultrasonic dispersion for 20-30min, and carrying out spray drying to obtain a fiber capsule, wherein the spray pressure is 0.5-2MPa, the drying temperature is 150-160 ℃, and the preparation examples of the o-cresol formaldehyde epoxy resin, the dimethylformamide solution and the emulsifier are 1:0.4-0.6: 0.05-0.1.
3. The expansive crack-resistant fiber concrete according to claim 2, wherein the polyphenylene sulfide fiber is prepared by the following method: according to the parts by weight, carrying out melt spinning on 2-5 parts of polyphenylene sulfide particles, 1-3 parts of EEA particles, 0.5-1 part of sugar filter mud and 1-2 parts of supercritical carbon dioxide to prepare blended fibers; adding 1.5-2 parts of cobalt, 2-4 parts of nano titanium dioxide and 1-3 parts of methyl methacrylate into the blended fiber, performing ultrasonic dispersion for 30-60min, and drying to obtain the polyphenylene sulfide fiber.
4. The expansive anti-crack fiber concrete according to claim 1, wherein the accelerator is prepared by mixing 2,4, 6-tris (dimethylaminomethyl) phenol, bis- (2-dimethylaminoethyl) ether and polyether N210 in a mass ratio of 1:1-1.5: 0.4-0.7.
5. The expanded crack-resistant fiber concrete according to claim 1, wherein the fiber capsule has a length of 20-25mm and a diameter of 3-6 mm.
6. The expanded crack-resistant fiber concrete as claimed in claim 1, wherein the admixture comprises 9-9.5 parts by weight of DH-1 type high-efficiency waterproof water reducing agent, 26-30 parts by weight of SY-K high-performance expansion crack-resistant agent and 8-10 parts by weight of SY-G high-efficiency crack-resistant waterproof agent.
7. The expanded anti-crack fiber concrete according to claim 1, wherein the admixture comprises fly ash and mineral powder, and the mass ratio of the mineral powder to the fly ash is 2.75-3: 0.7.
8. According to claim 7The preparation method of the expansion anti-crack fiber concrete is characterized in that the fly ash is F-class II-grade fly ash, the fineness (the screen allowance of a 45-micron square-hole screen) is less than or equal to 12 percent, the water demand ratio is 95-98 percent, the ignition loss is less than or equal to 4.5 percent, the mineral powder is S95-grade mineral powder, and the specific surface area of the mineral powder is 400-450 m-2Kg, 28 days activity index 95%, fluidity 99%.
9. The expanded crack-resistant fiber concrete according to claim 7, wherein the river sand and the artificial sand are both sand in the zone II, the fineness modulus is 2.9-3.0, the mud content of the river sand is 1.6%, the mud content of the artificial sand is 3.6%, the crushed stone is in a 5-31.5mm continuous gradation, and the mud content is 0.3-0.5%.
10. The method for preparing the expansive crack-resistant fiber concrete according to any one of claims 1 to 9, which comprises the following steps:
s1, weighing cement, river sand, artificial sand, an admixture, broken stone, water, an admixture, a fiber capsule and an accelerator according to the proportion of the components;
s2, mixing and stirring cement, river sand, gravel, artificial sand, an admixture and an accelerant for 2-5 min;
s3, adding the fiber capsule into the mixture obtained in the step S2, and stirring for 1-3 min;
s4, uniformly mixing the admixture and water, adding the mixture into the mixture obtained in the step S3, and stirring for 2-5min to obtain the expansive anti-crack fiber concrete.
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