CN117303792B - Concrete air-tight agent and preparation method thereof - Google Patents
Concrete air-tight agent and preparation method thereof Download PDFInfo
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- CN117303792B CN117303792B CN202311587457.2A CN202311587457A CN117303792B CN 117303792 B CN117303792 B CN 117303792B CN 202311587457 A CN202311587457 A CN 202311587457A CN 117303792 B CN117303792 B CN 117303792B
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- water reducer
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- 239000004567 concrete Substances 0.000 title claims abstract description 123
- 238000002360 preparation method Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 239000000839 emulsion Substances 0.000 claims abstract description 85
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 68
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 52
- 229920005646 polycarboxylate Polymers 0.000 claims abstract description 46
- 229920000223 polyglycerol Polymers 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 22
- XPBBUZJBQWWFFJ-UHFFFAOYSA-N fluorosilane Chemical compound [SiH3]F XPBBUZJBQWWFFJ-UHFFFAOYSA-N 0.000 claims abstract description 18
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012964 benzotriazole Substances 0.000 claims abstract description 13
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims abstract description 13
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical group COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 36
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 34
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 30
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 30
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 25
- 229940047670 sodium acrylate Drugs 0.000 claims description 25
- -1 polyoxyethylene propylene oxide Polymers 0.000 claims description 23
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 18
- 229920002554 vinyl polymer Polymers 0.000 claims description 18
- 239000000178 monomer Substances 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 14
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 13
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 12
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 12
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 claims description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 12
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 12
- 230000032050 esterification Effects 0.000 claims description 12
- 238000005886 esterification reaction Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 11
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 11
- 239000004917 carbon fiber Substances 0.000 claims description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 11
- 239000002243 precursor Substances 0.000 claims description 11
- 229910000077 silane Inorganic materials 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000002041 carbon nanotube Substances 0.000 claims description 10
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 9
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 9
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 7
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims description 7
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 claims description 6
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 6
- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 claims description 6
- 239000008030 superplasticizer Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 3
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000000693 micelle Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 25
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 23
- 239000008367 deionised water Substances 0.000 description 16
- 229910021641 deionized water Inorganic materials 0.000 description 16
- 238000003756 stirring Methods 0.000 description 13
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 9
- 239000003999 initiator Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000004568 cement Substances 0.000 description 8
- 239000000654 additive Substances 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000003995 emulsifying agent Substances 0.000 description 5
- QVDTXNVYSHVCGW-ONEGZZNKSA-N isopentenol Chemical compound CC(C)\C=C\O QVDTXNVYSHVCGW-ONEGZZNKSA-N 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 238000010257 thawing Methods 0.000 description 3
- QSYYSIXGDAAPNN-UHFFFAOYSA-N trimethoxy(tridecyl)silane Chemical compound CCCCCCCCCCCCC[Si](OC)(OC)OC QSYYSIXGDAAPNN-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- DKIDEFUBRARXTE-UHFFFAOYSA-N 3-mercaptopropanoic acid Chemical compound OC(=O)CCS DKIDEFUBRARXTE-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- DHWSSXSOLMVYTR-UHFFFAOYSA-N C(CCCCCCCCCCCC)CO[Si](OC)(OC)CCCCCCCC Chemical compound C(CCCCCCCCCCCC)CO[Si](OC)(OC)CCCCCCCC DHWSSXSOLMVYTR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement 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
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 125000005605 benzo group Chemical group 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
- 229910001981 cobalt nitrate Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- ZIWRUEGECALFST-UHFFFAOYSA-M sodium 4-(4-dodecoxysulfonylphenoxy)benzenesulfonate Chemical compound [Na+].CCCCCCCCCCCCOS(=O)(=O)c1ccc(Oc2ccc(cc2)S([O-])(=O)=O)cc1 ZIWRUEGECALFST-UHFFFAOYSA-M 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004078 waterproofing Methods 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a concrete air-tight agent and a preparation method thereof, wherein the air-tight agent comprises the following raw material components in parts by weight: 35-70 parts of emulsion, 20-45 parts of modified reinforced carbon material, 5-15 parts of polycarboxylate water reducer, 1-5 parts of benzotriazole and 5-10 parts of nano slump retaining agent; the emulsion comprises the following components in percentage by mass (1-3): 1 polyacrylic emulsion and styrene-acrylic emulsion; the polycarboxylate water reducer comprises the following components in percentage by mass (1-10): 3, a polyglycerol modified polycarboxylate water reducer and a fluorosilane grafted modified polycarboxylate water reducer. When the air-tight agent prepared by adding the emulsion and the water reducing agent of specific types in specific proportions and interacting with other raw materials is used in concrete, the comprehensive performance of the concrete is better, and particularly, the durability of the concrete can be greatly improved.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a concrete air-tight agent and a preparation method thereof.
Background
Compared with cement paste and mortar, the strength and durability of concrete (hardened product obtained from concrete composition) are dominant, and the most widely used construction engineering material in the world today is an artificial stone prepared by uniformly stirring, compacting, shaping, curing and hardening cementing materials (such as lime, cement and the like), granular aggregates (also called aggregate), water and additives and admixtures added if necessary according to a certain proportion. The durability of the concrete is an important judging standard of modern high-performance green concrete, the durability of the concrete refers to the fact that the concrete is exposed to natural environment and is subjected to expansion with heat and contraction with cold after freeze thawing cycle, and particularly, when water or other corrosive media permeate into the concrete, the concrete has various influences on technical indexes such as crack resistance, rib protection, corrosion resistance, freezing resistance, impermeability and alkali-aggregate resistance, so that the performance of the concrete is damaged, and the service life of the concrete is greatly shortened.
Along with the continuous increase of investment force of civil engineering projects of the infrastructure of China, the demand of people for concrete is also kept high. On one hand, the development of social economy requires the service life of the concrete building to be longer and longer, which puts forward higher requirements on the design life of the concrete building, and whether the actual service life of the concrete building reaches the design life mainly depends on the performance of concrete materials, so the performance and the service life of the concrete are particularly important in the construction process; on the other hand, because of the geographical characteristics of wide China operators and large climate difference, especially for coal formations, gypsum salt formations, salt lakes, salt fields, coastal ports, high altitude, low air temperature, gas-rich areas, natural gas areas and the like, the service life of the poured concrete is less than half of that of the poured concrete of other formations, so that the durability of the concrete is more challenging.
Generally speaking, concrete has a certain degree of plasticity problem and constraint problem, and certain air pockets and micro holes are formed in the concrete in the process of forming and hardening, so that the capacity of the concrete in the aspects of freezing resistance and erosion and penetration resistance is greatly reduced due to the adoption of a large number of air hole structures, the compactness of the concrete is reduced due to the existence of a large number of air hole structures, the working strength of the concrete is affected, and the service life of the concrete is affected. The concrete material is easy to be damaged by freeze thawing, salt corrosion and sulfate corrosion in the environments of freeze thawing, chloride salt and chemical corrosion, so that the concrete is cracked and damaged, and serious threat is caused to the durability of the concrete. The method provides great challenges for the construction of important civil engineering such as highways, railways, bridges, airports, water conservancy projects and the like in western high-altitude areas and areas with severe climates in China. Accordingly, in the current concrete industry, there is a strong need to improve the strength and durability of concrete structures.
Numerous studies have been made by the scholars with respect to the concrete properties, in particular the durability and permeation resistance. Studies show that reducing the water content of concrete per unit volume will improve the performance of the concrete, because in the process of mixing and pouring the concrete, in order to improve the workability, mixing water which is one time more than the water required by cement hydration is often added, and the redundant water forms adsorbed water and free water after the cement is hardened, wherein the free water forms water vapor in the process of changing temperature, the capillary pore diameter of the free water increases along with the concrete, the porosity increases, the pore structure becomes straighter and coarser, the rapid passing of various external corrosive media and natural water is more facilitated, the impermeability of the concrete is obviously reduced, the acidification and carbonization speeds are greatly increased, and the concrete structure is rapidly disintegrated and destroyed. In addition, the air tightness of concrete depends on the pore structure, porosity, pore size and pore structure characteristics of the concrete; the airtight performance of the concrete can be improved by adding a certain amount of airtight agent into the concrete, and the air hole structure and size of the concrete are improved, so that the waterproof and impervious effects are achieved.
The concrete air-tight agent is a concrete additive, and can improve the durability of concrete to a certain extent, but the air-tight agent in the prior art has single function and poor comprehensive performance, and in order to meet the use requirement of concrete, various additives, such as a water reducer for improving the rheological property of concrete mixture and the like, are usually added in the preparation of the concrete; retarder, early strength agent and the like for adjusting the setting time and hardening performance of concrete; air-tight agents, waterproofing agents, rust inhibitors, etc. that improve the durability of concrete; expansion agents, antifreezes, etc. for improving other properties of concrete, which may cause deterioration of workability of concrete due to compatibility problems of different kinds of additives; in addition, the addition and metering of various additives are complex, and the operation is not easy to control.
In summary, developing a concrete air-tight agent with better comprehensive performance is a current research hotspot in the field of concrete at home and abroad.
Disclosure of Invention
In view of the above, the present invention provides a concrete air-tight agent and a preparation method thereof in order to solve the defects and drawbacks of the single-function concrete air-tight agent in the prior art.
Specifically, the method comprises the following technical scheme:
on the one hand, the concrete air-tight agent comprises the following raw material components in parts by weight:
35-70 parts of emulsion, 20-45 parts of modified reinforced carbon material, 5-15 parts of polycarboxylate water reducer, 1-5 parts of benzotriazole and 5-10 parts of nano slump retaining agent;
the emulsion comprises the following components in percentage by mass (1-3): 1 polyacrylic emulsion and styrene-acrylic emulsion;
the polycarboxylate water reducer comprises the following components in percentage by mass (1-10): 3, a polyglycerol modified polycarboxylate water reducer and a fluorosilane grafted modified polycarboxylate water reducer.
The preparation process of the polyacrylic emulsion comprises the preparation of a core pre-emulsion and the preparation of a shell pre-emulsion;
preparing a nuclear pre-emulsion: the preparation raw materials comprise the following components in mole ratio (5-10): 1: (1-2): isooctyl acrylate, N-methylolacrylamide, methacrylic acid, and methyl methacrylate of (9-16);
preparing shell pre-emulsion: the preparation raw materials comprise the following components in mole ratio (35-80): (1-2.5): 1: (15-30): butyl acrylate, N-methylolacrylamide, methacrylic acid, methyl methacrylate and sodium p-styrenesulfonate of (2-4).
The polyacrylic emulsion prepared from the raw materials in the proportion has excellent cement workability, and can obviously improve the bonding strength, tensile strength, impermeability and water resistance of concrete by coaction with other components.
The concrete air-tight agent comprises the following preparation raw materials in a mole ratio of 1 (8-25): 1 styrene, butyl acrylate and hydroxypropyl methacrylate.
Further, the present invention is not particularly limited to the process for preparing the said benzo emulsion, for example, a semi-continuous pre-emulsification seed emulsion polymerization process is adopted. The styrene-acrylic emulsion prepared from the raw materials in the molar ratio can well improve the fluidity of each component in the concrete, and is beneficial to improving the workability of the concrete.
The concrete airtight agent is prepared by activating carbon fiber precursor and hydroxyl-containing carbon nano tubes with alkali liquor; further, the mass ratio of the carbon fiber precursor to the hydroxyl-containing carbon nano tube is 1 (3-8).
The modified reinforced carbon fiber is used as a densification component and a reinforcing component in the airtight agent system, and can well fill pores in concrete by coaction with other components, and can bridge microcracks of a matrix, inhibit crack growth and remarkably improve the tensile strength of the concrete.
The preparation raw materials of the fluorosilane grafted and modified polycarboxylate water reducer comprise silane modified monomers; in the preparation of the silane modified monomer, the preparation raw materials comprise the following components in a molar ratio of 1: aminopropyl triethoxysilane and tridecafluorooctyl trimethoxysilane of (3-6).
Furthermore, the preparation raw materials of the fluorosilane grafted and modified polycarboxylate superplasticizer also comprise the following components in mole ratio (1-2): the isobutenyl polyoxyethylene ether and acrylic acid of (3-5); in the preparation of the fluorosilane grafted and modified polycarboxylate superplasticizer, the molar ratio of the isobutenyl polyoxyethylene ether to the silane modified monomer is 1: (0.1-0.5).
The preparation process of the polyglycerol modified polycarboxylate water reducer comprises the preparation of modified polyglycerol and the preparation of a modified esterification intermediate; the polyglycerol modified polycarboxylate water reducer is obtained by grafting a modified esterification intermediate onto a main chain of the polycarboxylate water reducer; the modified esterified intermediate is obtained by modifying polyglycerol and introducing the modified polyglycerol into an esterified product of maleic anhydride and ethylene glycol monoethyl ether.
The preparation raw materials of the nano slump retaining agent comprise the following components in percentage by mole: (2-5): vinyl polyethylene oxide propylene oxide ether, sodium acrylate and tertiary methyl acrylate of (5-8); wherein, the mol ratio of the vinyl polyoxyethylene propylene oxide ether to the predetermined amount of sodium acrylate is 1: (1-2), the molar ratio of the remaining amount of sodium acrylate to tertiary methyl acrylate being (1-3): (5-8).
Further, the nano slump retaining agent is a spherical nano micelle, and the particle size is 10-50nm.
On the other hand, the invention also provides a preparation method of the concrete air-tight agent, wherein the concrete air-tight agent is shown in any one of the above;
the preparation method of the concrete airtight agent comprises the following steps:
according to a preset proportion, the modified reinforced carbon material and the emulsion are uniformly mixed, and the polycarboxylate water reducer, the benzotriazole and the nano slump retaining agent are added at 30-70 ℃ and uniformly stirred, so that the concrete air-tight agent is obtained.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
(1) The airtight agent provided by the embodiment of the invention is used in concrete, so that the concrete has better comprehensive performance, and the requirement of multiple functions of the airtight concrete can be completely met without adding other additives.
(2) Particularly, the airtight agent provided by the embodiment of the invention is used in concrete, and can greatly improve the durability of the concrete under the condition of low doping amount, so that the service life of the concrete structure building is prolonged, better slump can be expressed, and the working performance of the concrete is greatly improved.
Detailed Description
In order to make the technical scheme and advantages of the present invention more apparent, the following detailed description of the embodiments of the present invention will be provided.
Further description of the technical scheme:
1. the specific preparation of the polyacrylic emulsion is as follows:
preparing a nuclear pre-emulsion: 70g of deionized water and 7g of sodium dodecyl diphenyl ether disulfonate (emulsifier) are stirred and dissolved in a pre-emulsifying kettle, then 195g of mixed monomer (including isooctyl acrylate, N-methylolacrylamide, methacrylic acid and methyl methacrylate with the mol ratio of (5-10) to (1-2) to (9-16) is added under stirring, and stirring is continued to obtain nuclear emulsion;
preparing shell pre-emulsion: stirring and dissolving 270g of deionized water and 17g of nonylphenol polyoxyethylene ether (emulsifier) in a pre-emulsifying kettle, adding 800g of mixed monomers (comprising butyl acrylate, N-methylolacrylamide, methacrylic acid, methyl methacrylate and sodium p-styrene sulfonate with a molar ratio of (35-80) to (1-2.5) to (15-30) to (2-4) under stirring, and continuing stirring to obtain a shell pre-emulsion;
polymerization: adding 276g of deionized water, 0.2g of ammonium persulfate and 13.9g of nuclear pre-emulsion into a reaction kettle, heating to 82 ℃, reacting for 30 minutes, then simultaneously dripping the residual nuclear pre-emulsion and the nuclear initiator (the nuclear initiator is obtained by mixing 57g of deionized water, 2g of ammonium persulfate and 2g of sodium bicarbonate and stirring and dissolving the mixture), dripping the nuclear pre-emulsion in 1h, dripping the nuclear initiator in 1.5h, preserving heat for 1h after dripping the pre-emulsion and the nuclear initiator, then simultaneously dripping the shell pre-emulsion and the shell initiator (the shell initiator is obtained by dripping 149g of deionized water, 3.6g of ammonium persulfate and 3.6g of sodium bicarbonate and stirring and dissolving the mixture), dripping the shell initiator in 2h, dripping the shell pre-emulsion and the shell initiator in 2.5h, preserving heat for 1h, then cooling to 40 ℃, filtering and discharging the product, thus obtaining the acrylic emulsion.
2. The styrene-acrylic emulsion is specifically prepared as follows:
preparing a pre-emulsion: 95% of emulsifier (10 g of sodium dodecyl sulfate and 15g of fatty alcohol polyoxyethylene ether are dissolved in 160g of water to obtain the mixture), and all pH buffer solution (3 g of sodium bicarbonate is dissolved in 30g of water to obtain the mixture), are added into a four-neck flask, and 200g (including styrene, butyl acrylate and hydroxypropyl methacrylate with the molar ratio of 1 (8-25): 1) of all mixed monomers are dropwise added within 30min under the conditions of water bath at 40 ℃ and the rotating speed of a stirrer of 1000 r/min. After the dripping is finished, continuing stirring for 5min to obtain a pre-emulsion; preparing seed emulsion: the temperature of the water bath kettle is adjusted to 80 ℃, 96g of water and the rest 5 percent of emulsifying agent are added into a four-neck flask, and the mixture is added into the flask under the conditions of water bath at 80 ℃ and rotating speed of 160r/min
Preparing seed emulsion: adjusting the temperature of the water bath kettle to 80 ℃, adding 96g of water and the rest 5% of emulsifying agent into a four-neck flask, firstly dripping a part of initiating agent into the flask under the conditions of water bath at 80 ℃ and 160r/min rotating speed, and then dripping 10% of pre-emulsion and 20% of initiating agent at the same time, wherein the seed emulsion is obtained after the dripping is completed for 30 min;
the reaction: continuously dripping the rest pre-emulsion and the initiator into the seed emulsion at the water bath of 80 ℃ and the rotating speed of 120r/min, after 3 hours, keeping the temperature at 90 ℃ for 1 hour, stopping heating, cooling, adjusting the pH of the emulsion cooled to room temperature to 8 by using ammonia water (26% mass concentration), and filtering by using a 120-mesh filter screen to obtain the emulsion.
3. The modified reinforced carbon material is prepared by the following method: in a protective atmosphere, carrying out heating oxidation on carbon fiber precursor, heating to 200-350 ℃, and oxidizing for 1-2h to obtain pre-oxidized precursor; immersing the pre-oxidized fiber in an ethanol solution of cobalt nitrate and nickel nitrate for 5-10min, and drying to obtain loaded pre-oxidized fiber; heating the loaded preoxidized fiber and the carbon nano tube containing hydroxyl (the mass ratio of the carbon fiber precursor to the carbon nano tube containing hydroxyl is 1 (3-8)) to 450-550 ℃ in a protective atmosphere, preserving heat for 20-30min, and then introducing hydrogen; continuously heating to 550-800 ℃, introducing chlorine and acetylene, and preserving heat for 5-10min to obtain a modified reinforced carbon material; and (3) ultrasonically dispersing the modified reinforced carbon material in 30-45wt% sodium hydroxide solution for 15-30min to obtain the modified reinforced carbon material.
4. The fluorosilane grafted and modified polycarboxylate superplasticizer is prepared as follows: dissolving isobutenyl polyoxyethylene ether in water, stirring and heating to 55-75 ℃, then dropwise adding a mixed solution of acrylic acid and silane modified monomers (which are obtained by hydrolyzing and polycondensing aminopropyl triethoxysilane and tridecafluorooctyl trimethoxysilane under isopropanol and normal temperature) and ammonium persulfate, and reacting for 1-4h under heat preservation. Then dripping mercaptopropionic acid solution, continuously carrying out heat preservation reaction for 0.5-2h, cooling to room temperature after the reaction is finished, and adding alkali for neutralization to obtain the fluorosilane grafted modified polycarboxylate superplasticizer;
wherein the mol ratio of the aminopropyl triethoxy silane to the tridecyl octyl trimethoxy silane is 1: (3-6); the molar ratio of the isobutenyl polyoxyethylene ether to the acrylic acid is (1-2): (3-5); the molar ratio of the isobutenyl polyoxyethylene ether to the silane modified monomer is 1: (0.1-0.5).
5. The preparation of the polyglycerol modified polycarboxylate water reducer is as follows: adding proper amounts of isopentenol polyoxyethylene ether and deionized water into a four-necked flask, heating to 60-70 ℃ at 50-100r/min, adding potassium persulfate after the solution becomes transparent to obtain solution A, adding acrylic acid and modified esterification intermediate (adding ethylene glycol monoethyl ether into the four-necked flask, adding maleic anhydride at 30r/min, heating to 110 ℃, adding modified polyglycerol (adding polyglycerol, solvent toluene and hydroquinone into the four-necked flask, stirring, adding acrylic acid and p-toluenesulfonic acid, reacting for 2h at 60 ℃, azeotropically distilling water and toluene to obtain modified polyglycerol), reacting at constant temperature for 5h, cooling to room temperature after the reaction is finished to obtain modified esterification intermediate), preparing solution B with deionized water, stirring solution A for 5-10min, then starting to dropwise add solution B and solution C at constant speed, dropwise adding solution C at constant speed for 3.5-4.5h, cooling for 1-3h, and discharging after dropwise adding, cooling to obtain the modified polyglycerol carboxylic acid;
wherein the mol ratio of the ethylene glycol monoethyl ether to the maleic anhydride is 1 (1.3-1.8); the modified polyglycerol accounts for 3-5% of the mass of the maleic anhydride; the mass ratio of the acrylic acid to the modified esterification intermediate to the deionized water in the solution B is 1: (0.1-0.5): (10-20); the mass ratio of the isopentenol polyoxyethylene ether to the deionized water in the solution A is 1: (8-16);
the mass ratio of the reducing agent, the chain transfer agent and the deionized water in the solution C is 1:0.6:10, and the volume ratio of solution a, solution B, and solution C is 10:3: 0.5.
6. the preparation of the nanometer slump retaining agent comprises the following steps: dropwise adding the solution B (obtained by uniformly mixing ammonium persulfate, the residual sodium acrylate and the tertiary methyl acrylate in a molar ratio of (1-3) (5-8)) into the solution A (obtained by adding polyoxyethylene lauryl ether and n-butanol into water for dissolution, adding vinyl polyethylene oxide propylene ether in a molar ratio of (1-2) and a preset amount of sodium acrylate, and uniformly stirring), keeping the temperature at 25-80 ℃, continuously adding for 3.5-4.5h, keeping the temperature for 1-2h after the dropwise adding, and adjusting the PH to 5-9 to obtain the aqueous emulsion;
wherein, the mol ratio of the vinyl polyoxyethylene propylene oxide ether, the sodium acrylate and the tertiary methyl acrylate is 1: (2-5): (5-8); the total mole number of the laurinol polyoxyethylene ether and the n-butyl alcohol is 0.5-5% of the total mole number of the vinyl polyoxyethylene propylene oxide ether, the sodium acrylate and the tertiary methyl acrylate; the molar ratio of the laurinol polyoxyethylene ether to the n-butanol is 1: (1-3.5).
Selection of raw materials in the examples:
polyacrylic emulsion a: in the preparation of the core pre-emulsion, the molar ratio of the isooctyl acrylate to the N-methylolacrylamide to the methacrylic acid to the methyl methacrylate is 5:1:1:9; in the preparation of the shell pre-emulsion, the molar ratio of butyl acrylate, N-methylolacrylamide, methacrylic acid, methyl methacrylate and sodium p-styrenesulfonate is 35:1:1:15:2;
polyacrylic emulsion B: in the preparation of the core pre-emulsion, the molar ratio of the isooctyl acrylate to the N-methylolacrylamide to the methacrylic acid to the methyl methacrylate is 10:1:2:16; in the preparation of the shell pre-emulsion, the molar ratio of butyl acrylate, N-methylolacrylamide, methacrylic acid, methyl methacrylate and sodium p-styrenesulfonate is 80:2.5:1:30:4;
polyacrylic emulsion C: in the preparation of the core pre-emulsion, the molar ratio of the isooctyl acrylate to the N-methylolacrylamide to the methacrylic acid to the methyl methacrylate is 8:1:2:12; in the preparation of the shell pre-emulsion, the molar ratio of butyl acrylate, N-methylolacrylamide, methacrylic acid, methyl methacrylate and sodium p-styrenesulfonate is 50:1.5:1:20:3.
styrene-acrylic emulsion a: the mixed monomers are styrene, butyl acrylate and hydroxypropyl methacrylate with a molar ratio of 1:8:1;
styrene-acrylic emulsion B: the mixed monomers are styrene, butyl acrylate and hydroxypropyl methacrylate with a molar ratio of 1:25:1;
styrene-acrylic emulsion C: the mixed monomers are styrene, butyl acrylate and hydroxypropyl methacrylate with a molar ratio of 1:15:1.
The emulsion A is polyacrylic emulsion A and styrene-acrylic emulsion A with the mass ratio of 1:1;
the emulsion B is polyacrylic emulsion B and styrene-acrylic emulsion B with the mass ratio of 2:1;
emulsion C is polyacrylic emulsion C and styrene-acrylic emulsion C with the mass ratio of 3:1;
emulsion D is polyacrylic emulsion A and styrene-acrylic emulsion A with the mass ratio of 2:1.
Modified reinforcing carbon material a: the mass ratio of the carbon fiber precursor to the hydroxyl-containing carbon nano tube is 1:3, a step of;
modified reinforcing carbon material B: the mass ratio of the carbon fiber precursor to the hydroxyl-containing carbon nano tube is 1:5, a step of;
modified reinforcing carbon material C: the mass ratio of the carbon fiber precursor to the hydroxyl-containing carbon nano tube is 1:8, 8;
modified reinforcing carbon material D: the mass ratio of the carbon fiber precursor to the hydroxyl-containing carbon nano tube is 1:6.
fluorosilane grafted and modified polycarboxylate water reducer A: the molar ratio of the aminopropyl triethoxysilane to the tridecyl trimethoxysilane is 1:5, a step of; the molar ratio of the isobutenyl polyoxyethylene ether to the acrylic acid is 1:3, a step of; the molar ratio of the isobutenyl polyoxyethylene ether to the silane modified monomer is 1:0.1;
fluorosilane grafted and modified polycarboxylate water reducer B: the molar ratio of the aminopropyl triethoxysilane to the tridecyl trimethoxysilane is 1:6, preparing a base material; the molar ratio of the isobutenyl polyoxyethylene ether to the acrylic acid is 2:3, a step of; the molar ratio of the isobutenyl polyoxyethylene ether to the silane modified monomer is 1:0.5;
fluorosilane grafted and modified polycarboxylate water reducer C: the molar ratio of the aminopropyl triethoxysilane to the tridecyl trimethoxysilane is 1:3, a step of; the molar ratio of the isobutenyl polyoxyethylene ether to the acrylic acid is 2:5, a step of; the molar ratio of the isobutenyl polyoxyethylene ether to the silane modified monomer is 1:0.3.
polyglycerol modified polycarboxylate water reducer A: the mol ratio of the ethylene glycol monoethyl ether to the maleic anhydride is 1:1.3; the modified polyglycerol accounts for 3% of the mass of the maleic anhydride; the mass ratio of the acrylic acid to the modified esterification intermediate to the deionized water in the solution B is 1:0.1:10; the mass ratio of the isopentenol polyoxyethylene ether to the deionized water in the solution A is 1:8, 8;
polyglycerol modified polycarboxylate water reducer B: the mol ratio of the ethylene glycol monoethyl ether to the maleic anhydride is 1:1.5; the modified polyglycerol accounts for 4% of the mass of the maleic anhydride; the mass ratio of the acrylic acid to the modified esterification intermediate to the deionized water in the solution B is 1:0.3:15; the mass ratio of the isopentenol polyoxyethylene ether to the deionized water in the solution A is 1:16;
polyglycerol modified polycarboxylate water reducer C: the mol ratio of the ethylene glycol monoethyl ether to the maleic anhydride is 1:1.8; the modified polyglycerol accounts for 5% of the mass of the maleic anhydride; the mass ratio of the acrylic acid to the modified esterification intermediate to the deionized water in the solution B is 1:0.5:20, a step of; the mass ratio of the isopentenol polyoxyethylene ether to the deionized water in the solution A is 1:10.
the polycarboxylic acid water reducer A is a polyglycerol modified polycarboxylic acid water reducer A and a fluorosilane grafted modified polycarboxylic acid water reducer A with the mass ratio of 1:3;
the polycarboxylic acid water reducer B is a polyglycerol modified polycarboxylic acid water reducer B and a fluorosilane grafted modified polycarboxylic acid water reducer B with a mass ratio of 5:3;
the polycarboxylic acid water reducer C is a polyglycerol modified polycarboxylic acid water reducer C and a fluorosilane grafted modified polycarboxylic acid water reducer C with the mass ratio of 10:3;
the polycarboxylate water reducer D is a polyglycerol modified polycarboxylate water reducer A and a fluorosilane grafted modified polycarboxylate water reducer A with the mass ratio of 7:3.
Nano slump retaining agent A: the molar ratio of the vinyl polyethylene oxide propylene oxide ether to the sodium acrylate to the tertiary methyl acrylate is 1:2:5, wherein the molar ratio of the vinyl polyethylene oxide propylene oxide ether to the predetermined amount of sodium acrylate is 1:1, and the molar ratio of the residual amount of sodium acrylate to the tertiary methyl acrylate is 1:5; the total mole number of the laurinol polyoxyethylene ether and the n-butanol is 0.5 percent of the total mole number of the vinyl polyoxyethylene propylene oxide ether, the sodium acrylate and the tertiary methyl acrylate; the molar ratio of the laurinol polyoxyethylene ether to the n-butanol is 1:1, a step of;
nano slump retaining agent B: the molar ratio of the vinyl polyethylene oxide propylene oxide ether to the sodium acrylate to the tertiary methyl acrylate is 1:5:8, wherein the molar ratio of the vinyl polyethylene oxide propylene oxide ether to the predetermined amount of sodium acrylate is 1:2; the molar ratio of the residual sodium acrylate to the tertiary methyl acrylate is 3:8; the total mole number of the laurinol polyoxyethylene ether and the n-butanol is 5 percent of the total mole number of the vinyl polyoxyethylene propylene oxide ether, the sodium acrylate and the tertiary methyl acrylate; the molar ratio of the laurinol polyoxyethylene ether to the n-butanol is 1:3.5;
nano slump retaining agent C: the molar ratio of the vinyl polyethylene oxide propylene oxide ether to the sodium acrylate to the tertiary methyl acrylate is 1:4.5:5, wherein the molar ratio of the vinyl polyethylene oxide propylene oxide ether to the predetermined amount of sodium acrylate is 1:1.5; the molar ratio of the residual sodium acrylate to the tertiary methyl acrylate is 3:5; the total mole number of the laurinol polyoxyethylene ether and the n-butanol is 2 percent of the total mole number of the vinyl polyoxyethylene propylene oxide ether, the sodium acrylate and the tertiary methyl acrylate; the molar ratio of the laurinol polyoxyethylene ether to the n-butanol is 1:2;
nano slump retaining agent D: the mol ratio of the vinyl polyoxyethylene propylene oxide ether to the predetermined amount of sodium acrylate is 1:2; the molar ratio of the rest sodium acrylate to the tertiary methyl acrylate is 1:8; the total mole number of the laurinol polyoxyethylene ether and the n-butanol is 3.5 percent of the total mole number of the vinyl polyoxyethylene propylene oxide ether, the sodium acrylate and the tertiary methyl acrylate; the molar ratio of the laurinol polyoxyethylene ether to the n-butanol is 1:3.
example 1: the concrete airtight agent comprises the following raw material components in parts by weight:
35 parts of emulsion A,20 parts of modified reinforced carbon material B,15 parts of polycarboxylate water reducer C,5 parts of benzotriazole and 5 parts of nano slump retaining agent A;
according to the proportion, the modified reinforced carbon material and the emulsion are uniformly mixed, and the polycarboxylate water reducer, the benzotriazole and the nanometer slump retaining agent are added at 30 ℃ and uniformly stirred, so that the concrete air-tight agent is obtained.
Example 2: the concrete airtight agent comprises the following raw material components in parts by weight:
50 parts of emulsion B,30 parts of modified reinforced carbon material A,10 parts of polycarboxylate water reducer A,3 parts of benzotriazole and 7 parts of nano slump retaining agent C;
according to the proportion, the modified reinforced carbon material and the emulsion are uniformly mixed, and the polycarboxylate water reducer, the benzotriazole and the nanometer slump retaining agent are added at 70 ℃ and uniformly stirred, so that the concrete air-tight agent is obtained.
Example 3: the concrete airtight agent comprises the following raw material components in parts by weight:
70 parts of emulsion C,45 parts of modified reinforced carbon material D,5 parts of polycarboxylate water reducer D,1 part of benzotriazole and 10 parts of nano slump retaining agent B;
according to the proportion, the modified reinforced carbon material and the emulsion are uniformly mixed, and the polycarboxylate water reducer, the benzotriazole and the nanometer slump retaining agent are added at 40 ℃ and uniformly stirred, so that the concrete air-tight agent is obtained.
Example 4: the concrete airtight agent comprises the following raw material components in parts by weight:
60 parts of emulsion D,35 parts of modified reinforced carbon material C,8 parts of polycarboxylate water reducer B,4 parts of benzotriazole and 6 parts of nano slump retaining agent D;
according to the proportion, the modified reinforced carbon material and the emulsion are uniformly mixed, and the polycarboxylate water reducer, the benzotriazole and the nanometer slump retaining agent are added at 55 ℃ and uniformly stirred, so that the concrete air-tight agent is obtained.
Preparing a concrete sample: concrete trial experiments were performed on the concrete air-tightness agents prepared in examples 1 to 4, respectively, and concrete mix ratios for the experiments are shown in Table 1.
Table 1: concrete mixing proportion table for experiments.
Note that: the amount of air-tight agent is defined as the percentage by weight of the cementitious material. Wherein, the cement is P.O 42.5.5 ordinary Portland cement produced by yellow petrifaction new cement; the mineral powder is produced by Wuxin mineral powder factories; the fly ash is yang patrol grade II ash; sand fineness modulus is 2.8; the crushed stone is crushed stone with the grain diameter of 5-20mm and continuous grading.
Performance test: preparing the concrete with the proportion into a standard concrete test piece, curing for 28d at room temperature, and carrying out corresponding performance test: slump (measured according to GB/T50080 method for Performance test of ordinary concrete mixtures); concrete compressive strength (according to GB/T50010 concrete structural design Specification); the air permeability coefficient of concrete (according to TB10120-2002 technical Specification for railway gas tunnels, the air permeability coefficient of concrete is detected for 28 days this time, and the detected air pressure is 0.6 Mpa); the corrosion resistance (according to GB/T749-2008 "cement sulfate erosion resistance experiment method" and TB10424-2018 "railway concrete engineering construction quality acceptance Standard", obtained by calculating the ratio of the flexural strength of a concrete test piece immersed in a sodium sulfate solution to the flexural strength of the same period in drinking water); impermeability (tested according to GB/T50082-2009 test method for Long-term Properties and durability of ordinary concrete); testing the air bubble spacing coefficient of the concrete before and after the air-tightness agent is doped by adopting a linear wire method according to the design specification of durability of railway concrete structure (TB 10005-2010); the strength of the air-tight agent-doped concrete at different ages was tested according to concrete admixture (GB 8076-2008) and the test results are shown in Table 2:
table 2: test results table.
As can be seen from Table 2, the concrete air-tight agent prepared by the invention has excellent comprehensive performance and better performance, can completely meet the requirements of multiple functions of air-tight concrete without adding other additives, and can change the pore structure of hardened concrete, reduce the air bubble spacing coefficient of the concrete, increase the compactness of the concrete, thereby improving the frost resistance and erosion resistance of the concrete and improving the durability of the concrete. Secondly, the air-tight agent can express better slump at a low mixing amount, so that the concrete has better plasticizing performance and pumpability.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. The concrete airtight agent is characterized by comprising the following raw material components in parts by weight:
35-70 parts of emulsion, 20-45 parts of modified reinforced carbon material, 5-15 parts of polycarboxylate water reducer, 1-5 parts of benzotriazole and 5-10 parts of nano slump retaining agent;
the emulsion comprises the following components in percentage by mass (1-3): 1 polyacrylic emulsion and styrene-acrylic emulsion;
the polycarboxylate water reducer comprises the following components in percentage by mass (1-10): 3, a polyglycerol modified polycarboxylate water reducer and a fluorosilane grafted modified polycarboxylate water reducer;
the preparation process of the polyacrylic emulsion comprises the preparation of a core pre-emulsion and the preparation of a shell pre-emulsion;
preparing a nuclear pre-emulsion: the preparation raw materials comprise the following components in mole ratio (5-10): 1: (1-2): isooctyl acrylate, N-methylolacrylamide, methacrylic acid, and methyl methacrylate of (9-16);
preparing shell pre-emulsion: the preparation raw materials comprise the following components in mole ratio (35-80): (1-2.5): 1: (15-30): butyl acrylate, N-methylolacrylamide, methacrylic acid, methyl methacrylate and sodium p-styrenesulfonate of (2-4);
the modified reinforced carbon material is prepared by activating carbon fiber precursors and hydroxyl-containing carbon nanotubes by alkali liquor;
the mass ratio of the carbon fiber precursor to the carbon nano tube containing hydroxyl is 1 (3-8);
the preparation raw materials of the fluorosilane grafted and modified polycarboxylate superplasticizer comprise silane modified monomers; in the preparation of the silane modified monomer, the preparation raw materials comprise the following components in a molar ratio of 1: aminopropyl triethoxysilane and tridecafluorooctyl trimethoxysilane of (3-6);
the preparation process of the polyglycerol modified polycarboxylate water reducer comprises the steps of preparing modified polyglycerol and preparing a modified esterification intermediate;
the polyglycerol modified polycarboxylate water reducer is obtained by grafting a modified esterification intermediate onto a main chain of the polycarboxylate water reducer; the modified esterification intermediate is obtained by modifying polyglycerol and introducing the modified polyglycerol into an esterification product of maleic anhydride and ethylene glycol monoethyl ether;
the preparation raw materials of the nanometer slump retaining agent comprise the following components in mole ratio of 1: (2-5): vinyl polyethylene oxide propylene oxide ether, sodium acrylate and tertiary methyl acrylate of (5-8);
wherein, the mol ratio of the vinyl polyoxyethylene propylene oxide ether to the predetermined amount of sodium acrylate is 1: (1-2), the molar ratio of the remaining amount of sodium acrylate to tertiary methyl acrylate being (1-3): (5-8).
2. The concrete air-tight agent according to claim 1, wherein the styrene-acrylic emulsion is prepared from the following raw materials in a molar ratio of 1 (8-25): 1 styrene, butyl acrylate and hydroxypropyl methacrylate.
3. The concrete air-tight agent according to claim 1, wherein the raw materials for preparing the fluorosilane graft modified polycarboxylate water reducer further comprise the following components in a molar ratio of (1-2): the isobutenyl polyoxyethylene ether and acrylic acid of (3-5);
in the preparation of the fluorosilane grafted and modified polycarboxylate superplasticizer, the molar ratio of the isobutenyl polyoxyethylene ether to the silane modified monomer is 1: (0.1-0.5).
4. The concrete air-tight agent according to claim 1, wherein the nano slump retaining agent is spherical nano micelle, and the particle size is 10-50nm.
5. A method of preparing a concrete air-tight agent according to any one of claims 1 to 4, comprising the steps of:
according to a preset proportion, the modified reinforced carbon material and the emulsion are uniformly mixed, and the polycarboxylate water reducer, the benzotriazole and the nano slump retaining agent are added at 30-70 ℃ and uniformly stirred, so that the concrete air-tight agent is obtained.
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| CN111875320A (en) * | 2020-08-19 | 2020-11-03 | 济南大学 | Super-hydrophobic microcapsule polymer cement-based anticorrosive paint and preparation method and application thereof |
| KR102338598B1 (en) * | 2021-08-04 | 2021-12-15 | 송지연 | Quick-hardening and ultra-early strength type cement concrete composition having high ductility modified by acrylic latex-based modifier and reinforcing and repairing method of road pavement using the same |
| CN116903335A (en) * | 2023-07-25 | 2023-10-20 | 青岛林海新型建材有限公司 | Early-strength quick-setting sprayed concrete material and processing technology thereof |
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2023
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| CN1557768A (en) * | 2004-01-15 | 2004-12-29 | 杨苏文 | Light high-strength heat-insulation building material and method for making same |
| KR101203919B1 (en) * | 2012-05-31 | 2012-11-22 | 최종윤 | Rapid hardening concrete composition modified with styrene-propenoate terpolymer latex, repairing method for concrete pavement using the same |
| CN109231935A (en) * | 2018-10-18 | 2019-01-18 | 中国铁道科学研究院集团有限公司金属及化学研究所 | A kind of method of polymer quick-hardening cement mortar and waterproof roll concrete cover rapid-maintenance |
| CN110330273A (en) * | 2019-05-31 | 2019-10-15 | 中国铁路总公司 | Fibre reinforced concrete raw material, fibre reinforced concrete and its preparation method and application |
| CN111875320A (en) * | 2020-08-19 | 2020-11-03 | 济南大学 | Super-hydrophobic microcapsule polymer cement-based anticorrosive paint and preparation method and application thereof |
| KR102338598B1 (en) * | 2021-08-04 | 2021-12-15 | 송지연 | Quick-hardening and ultra-early strength type cement concrete composition having high ductility modified by acrylic latex-based modifier and reinforcing and repairing method of road pavement using the same |
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