CN114956664A - Epoxy resin modified polyurethane concrete and preparation method thereof - Google Patents
Epoxy resin modified polyurethane concrete and preparation method thereof Download PDFInfo
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- CN114956664A CN114956664A CN202210709555.8A CN202210709555A CN114956664A CN 114956664 A CN114956664 A CN 114956664A CN 202210709555 A CN202210709555 A CN 202210709555A CN 114956664 A CN114956664 A CN 114956664A
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- epoxy resin
- component
- modified polyurethane
- polyurethane concrete
- agent
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- 239000003822 epoxy resin Substances 0.000 title claims abstract description 57
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 57
- 239000004567 concrete Substances 0.000 title claims abstract description 52
- 239000004814 polyurethane Substances 0.000 title claims abstract description 47
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000002808 molecular sieve Substances 0.000 claims abstract description 15
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000004970 Chain extender Substances 0.000 claims abstract description 13
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims abstract description 10
- 229910001576 calcium mineral Inorganic materials 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 32
- 239000004593 Epoxy Substances 0.000 claims description 16
- 229920005862 polyol Polymers 0.000 claims description 16
- 150000003077 polyols Chemical class 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 13
- 238000007142 ring opening reaction Methods 0.000 claims description 11
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 10
- 229920000098 polyolefin Polymers 0.000 claims description 9
- 239000005062 Polybutadiene Substances 0.000 claims description 8
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 239000007822 coupling agent Substances 0.000 claims description 8
- 229920002857 polybutadiene Polymers 0.000 claims description 8
- 239000005056 polyisocyanate Substances 0.000 claims description 6
- 229920001228 polyisocyanate Polymers 0.000 claims description 6
- 238000006555 catalytic reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- -1 phthalate ester Chemical class 0.000 claims description 5
- 239000004014 plasticizer Substances 0.000 claims description 5
- 229920000058 polyacrylate Polymers 0.000 claims description 5
- 239000012974 tin catalyst Substances 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- JCTXKRPTIMZBJT-UHFFFAOYSA-N 2,2,4-trimethylpentane-1,3-diol Chemical compound CC(C)C(O)C(C)(C)CO JCTXKRPTIMZBJT-UHFFFAOYSA-N 0.000 claims description 3
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 claims description 3
- DSKYSDCYIODJPC-UHFFFAOYSA-N 2-butyl-2-ethylpropane-1,3-diol Chemical compound CCCCC(CC)(CO)CO DSKYSDCYIODJPC-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 150000002009 diols Chemical group 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 24
- 239000010959 steel Substances 0.000 abstract description 24
- 238000010276 construction Methods 0.000 abstract description 8
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 8
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- FBUKVWPVBMHYJY-UHFFFAOYSA-N nonanoic acid Chemical compound CCCCCCCCC(O)=O FBUKVWPVBMHYJY-UHFFFAOYSA-N 0.000 description 6
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000013001 point bending Methods 0.000 description 5
- KCXZNSGUUQJJTR-UHFFFAOYSA-N Di-n-hexyl phthalate Chemical compound CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCC KCXZNSGUUQJJTR-UHFFFAOYSA-N 0.000 description 4
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid Chemical compound CCCCCCC(O)=O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 description 4
- 239000005643 Pelargonic acid Substances 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 229940005605 valeric acid Drugs 0.000 description 3
- ZRWNRAJCPNLYAK-UHFFFAOYSA-N 4-bromobenzamide Chemical compound NC(=O)C1=CC=C(Br)C=C1 ZRWNRAJCPNLYAK-UHFFFAOYSA-N 0.000 description 2
- IRIAEXORFWYRCZ-UHFFFAOYSA-N Butylbenzyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCC1=CC=CC=C1 IRIAEXORFWYRCZ-UHFFFAOYSA-N 0.000 description 2
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- ISKQADXMHQSTHK-UHFFFAOYSA-N [4-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=C(CN)C=C1 ISKQADXMHQSTHK-UHFFFAOYSA-N 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 description 2
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 2
- 229960001826 dimethylphthalate Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000003827 glycol group Chemical group 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- QGLRLXLDMZCFBP-UHFFFAOYSA-N 1,6-diisocyanato-2,4,4-trimethylhexane Chemical compound O=C=NCC(C)CC(C)(C)CCN=C=O QGLRLXLDMZCFBP-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- AWQSAIIDOMEEOD-UHFFFAOYSA-N 5,5-Dimethyl-4-(3-oxobutyl)dihydro-2(3H)-furanone Chemical compound CC(=O)CCC1CC(=O)OC1(C)C AWQSAIIDOMEEOD-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- TWLCPLJMACDPFF-UHFFFAOYSA-N cyclohexane;1,2-diisocyanatoethane Chemical compound C1CCCCC1.O=C=NCCN=C=O TWLCPLJMACDPFF-UHFFFAOYSA-N 0.000 description 1
- SDTDHTCWRNVNAJ-UHFFFAOYSA-L dimethyltin(2+);diacetate Chemical compound CC(=O)O[Sn](C)(C)OC(C)=O SDTDHTCWRNVNAJ-UHFFFAOYSA-L 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000008029 phthalate plasticizer Substances 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/16—Polyurethanes
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The application relates to the technical field of concrete materials paved on steel bridge deck, and discloses epoxy resin modified polyurethane concrete and a preparation method thereof, wherein the epoxy resin modified polyurethane concrete comprises A, B, C three components, and is characterized in that: the component A is an NCO-terminated polyurethane prepolymer; the component B is a mixture of a chain extender, a flatting agent and a functional auxiliary agent; the component C is a mixture of light aggregate, light calcium mineral powder and a molecular sieve; A. b, C, the weight ratio of the three components is 90-130: 20-60: 350-1200. The waterproof mortar has the advantages of light weight, high strength, hydrolysis resistance, good waterproof performance, excellent interface bonding capability and follow-up deformation capability, can be directly paved at normal temperature by depending on the self fluidity, and meets the construction requirements of on-site mixing and on-site paving at different temperatures.
Description
Technical Field
The invention relates to the technical field of concrete materials for paving steel bridge decks, in particular to epoxy resin modified polyurethane concrete and a preparation method thereof.
Background
The steel bridge deck pavement technology in China has been developed to the present, and the existing steel bridge deck pavement material has met the technical bottleneck of further development. The traditional paving material adopts asphalt mixture, and due to the limitation of characteristics of the asphalt mixture, the performance of the existing steel bridge deck asphalt pavement technology is greatly improved, and the difficulty of further prolonging the service life of bridge deck pavement is very huge, which still is an industrial problem. Meanwhile, asphalt pavement needs to be heated to 160-250 ℃, construction difficulty is increased, and carbon emission is high.
At present, with the increase of the span of steel bridges, such as the Sisi hong Jiang bridge main span 1700m, the Guangzhou south sand bridge main span 1688m and the Lingzhou grand bridge main span 1666m, the requirement of lightening the bridge deck pavement is increasingly increased when the span is larger. The invention discloses a polyurethane rubber porous mixture for paving a concrete bridge deck and a preparation method thereof, wherein the publication number is CN110342854A, polyurethane, rubber and mineral aggregate are utilized to form the mixture, and the self weight and the strength of the mixture cannot be applied to the construction of a large-span bridge. The density of the existing steel bridge deck pavement material reaches 2.40-2.50 g/cm 3 The lifting of the bridge span is limited by the self weight of the large pavement layer, and the light high-strength pavement of the steel bridge deck is an effective way for solving the construction of the large-span bridge.
Disclosure of Invention
The invention aims to provide epoxy resin modified polyurethane concrete and a preparation method thereof, so as to realize light weight, high strength and self-leveling construction and guarantee the interface bonding performance.
In order to achieve the purpose, the invention provides epoxy resin modified polyurethane concrete which comprises A, B, C three components, and is characterized in that:
the component A is an NCO-terminated polyurethane prepolymer;
the component B is a mixture of a chain extender, a flatting agent and a functional auxiliary agent;
the component C is a mixture of light aggregate, light calcium ore powder and a molecular sieve;
A. b, C, the weight ratio of the three components is 90-130: 20-60: 350-1200.
In order to improve the bridge span and reduce the dead weight of the paving material, the proportion of the lightweight aggregate, the lightweight calcium ore powder and the molecular sieve is 60-90: 10-40: 1 to 5.
Further, the lightweight aggregate in the component C is at least one of fly ash ceramsite sand, shale ceramsite sand and clay ceramsite sand, and the particle size of the lightweight aggregate is not more than 4.75 mm.
Preferably, in order to achieve self-leveling more easily, the leveling agent is a polyacrylate copolymer.
In order to remove moisture from the material and avoid foaming, the molecular sieve is a 4A molecular sieve.
In order to improve the mechanical strength of the material, the NCO-terminated polyurethane prepolymer comprises epoxy resin, organic acid, polyolefin polyol and polyisocyanate.
Furthermore, the epoxy resin is bisphenol A epoxy resin, and the epoxy equivalent is 170-230 g/mol.
In order to improve the reaction degree and realize the ring opening of the epoxy resin, the organic acid adopts at least one of valeric acid, pelargonic acid, heptanoic acid, oleic acid and lactic acid, the epoxy resin can be changed from one hydroxyl group into three hydroxyl groups, and the epoxy resin is used as a polyalcohol to react with polyisocyanate, so that the modification effect is improved.
Preferably, polybutadiene polyol is adopted as the polyolefin polyol, so that the stability of the material under the action of rainwater is further improved, and the durability is further improved.
Preferably, the polyisocyanate is at least one of toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, cyclohexane dimethylene diisocyanate and trimethyl-1, 6-hexamethylene diisocyanate.
In order to enable the prepolymer to have a curing reaction and change from a liquid state to a solid state, the chain extender is a glycol chain extender.
Preferably, the glycol chain extender is at least one selected from the group consisting of 1, 4-butanediol, 2-ethyl-1, 3-hexanediol, 2, 4-trimethyl-1, 3-pentanediol, and 2-butyl-2-ethyl-1, 3-propanediol.
In order to regulate and control reaction time, reduce viscosity and improve the workability of construction of materials, the functional auxiliary agents in the component B comprise organic tin catalysts, phthalate ester plasticizers, coupling agents and defoaming agents.
Preferably, the organotin catalyst is at least one selected from the group consisting of dibutyltin diacetate, dimethyltin diacetate, dibutyltin dilaurate and dimethyltin dilaurate.
Preferably, the phthalate plasticizer is at least one of dioctyl phthalate, dimethyl phthalate, butyl benzyl phthalate and dihexyl phthalate.
Preferably, the ratio of the leveling agent, the chain extender, the organic tin catalyst, the phthalate ester plasticizer, the coupling agent and the defoaming agent in the component B is 2-6: 10-35: 0.5-1.5: 15-55: 6-16: 1 to 5.
A preparation method of epoxy resin modified polyurethane concrete comprises the following steps:
(1) respectively placing polyolefin polyol and epoxy resin in a flask, and dehydrating in vacuum at 110 ℃ to remove water in the materials;
(2) adding excessive organic acid into epoxy resin, performing catalytic reaction for 4-6 hours under the protection of nitrogen atmosphere and at the temperature of 90-120 ℃ to prepare ring-opening epoxy resin;
(3) placing a mixture of polyolefin polyol and ring-opening epoxy resin in a flask, stirring in a nitrogen atmosphere, adding polyisocyanate in proportion, controlling the temperature at 70-90 ℃, and reacting for 3-6 h to obtain an NCO-terminated polyurethane prepolymer, namely a component A;
(4) uniformly mixing and stirring a flatting agent, a chain extender, an organic tin catalyst, a phthalate ester plasticizer, a coupling agent, a defoaming agent and other functional auxiliaries in proportion to obtain a component B;
(5) placing the lightweight aggregate and the lightweight calcium ore powder in an oven at 110 ℃ for 2-5 h, removing water, and then cooling to room temperature; then pouring the mixture into a stirring pot according to a proportion, stirring for 1-5 min, continuously adding the molecular sieve, and stirring until the mixture is uniform to obtain a component C;
(6) and pouring the component A, the component B and the component C into a stirring pot at room temperature, and stirring for 2-5 min to obtain the epoxy resin modified polyurethane concrete.
Has the advantages that: 1. the epoxy resin modified polyurethane concrete adopts the light aggregate and the light calcium mineral powder, so that the self weight of the material can be obviously reduced, compared with the weight of the existing material, the weight is reduced by 1/3-1/5, and meanwhile, the mechanical strength of the material is further improved through the epoxy resin modified polyurethane, so that the light weight and high strength of a steel bridge deck pavement layer are realized; the construction holding time of the epoxy resin modified polyurethane concrete is adjustable, and the construction requirements of mixing and paving at the same time under different temperatures can be met; the epoxy resin modified polyurethane concrete has good fluidity, can be directly paved at normal temperature, is green and environment-friendly, responds to the national double-carbon strategy and ecological environment protection strategy, and the novel paving material which is mixed at normal temperature and paved at the moment can provide a green low-carbon new scheme for the steel bridge deck pavement market;
2. on the basis of keeping excellent flexibility and deformability of polyurethane, the epoxy resin modified polyurethane concrete also has excellent adhesive property of epoxy resin, the adhesive strength (without adhesive) and the follow-up deformability of the concrete and a steel plate are obviously improved, a pavement layer is not easy to delaminate and damage under the repeated action of running load, and the service life of pavement of a steel bridge deck is prolonged;
3. the adoption of the polyolefin polyol, the higher sizing material ratio and the aggregate with smaller grain size can ensure the excellent waterproof effect and the water stability of the epoxy resin modified polyurethane concrete and realize the long-acting waterproof protection of the steel bridge deck.
Detailed Description
The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to these embodiments, and modifications made to the present invention are within the scope of the claims of the present invention without departing from the principle of the present invention.
Example 1
An epoxy resin modified polyurethane concrete and a preparation method thereof are as follows:
(1) respectively placing polybutadiene polyol and bisphenol A epoxy resin with epoxy equivalent of 176g/mol in a three-neck flask, vacuum dehydrating for 3h at 110 ℃, and continuing vacuum dehydrating for 1h when no obvious bubbles are generated, namely removing water in the material;
(2) adding excessive valeric acid into bisphenol A epoxy resin with epoxy equivalent of 176g/mol, carrying out catalytic reaction for 5 hours under the protection of nitrogen atmosphere and at the temperature of 100 ℃, and carrying out suction filtration on redundant valeric acid after the reaction is finished to obtain the ring-opening epoxy resin.
(3) Placing a mixture of 100 parts of polybutadiene polyol and 8 parts of ring-opening epoxy resin in a four-neck flask, stirring in a nitrogen atmosphere, adding 45 parts of toluene diisocyanate, controlling the temperature at 80 ℃, and reacting for 5 hours to obtain an NCO-terminated polyurethane prepolymer, namely a component A;
(4) putting 25 parts of 2-ethyl-1, 3-hexanediol, 4 parts of polyacrylate copolymer BYK-350, 0.9 part of dibutyltin diacetate, 20 parts of dioctyl phthalate, 11 parts of coupling agent KH-550, 2.5 parts of defoaming agent BYK-088 and the like into a flask, and mixing and stirring uniformly to obtain a component B;
(5) placing the fly ash ceramsite sand and the light calcium mineral powder in a 110 ℃ oven for 4h, removing water, and then cooling to room temperature. Then pouring the mixture into a stirring pot in proportion, stirring for 2min, and continuing adding a 4A molecular sieve, wherein the proportion of the fly ash ceramsite sand, the light calcium mineral powder and the 4A molecular sieve is 70: 30: 3, stirring for 2min until uniform to obtain a component C;
(6) pouring the component A, the component B and the component C into a stirring pot at room temperature, and stirring for 5min, wherein the component A: and the component B comprises: c component = 100: 30.5: 580, obtaining the epoxy resin modified polyurethane concrete.
The density of the epoxy resin modified polyurethane concrete is 1.67 g/cm through testing 3 (ii) a The water seepage coefficient is 0 mL/min; the compressive strength is 31 MPa; under the temperature of 25 ℃ and without the action of an adhesive, the adhesive strength of the epoxy resin modified polyurethane concrete and the steel plate is 5.7 MPa; under the temperature of 60 ℃ and without the action of an adhesive, the adhesive strength of the epoxy resin modified polyurethane concrete and the steel plate is 2.2 MPa; the five-point bending fatigue times (overload) of the composite beam test piece are more than 100 ten thousand times.
Example 2
An epoxy resin modified polyurethane concrete and a preparation method thereof are as follows:
(1) respectively placing polybutadiene polyol and bisphenol A epoxy resin with epoxy equivalent of 185g/mol into a three-neck flask, vacuum dehydrating for 3h at 110 ℃, and continuing vacuum dehydrating for 1h when no obvious bubbles are generated in the raw materials, so as to remove the water in the materials;
(2) adding excessive pelargonic acid into bisphenol A epoxy resin with epoxy equivalent of 185g/mol, carrying out catalytic reaction for 5 hours under the protection of nitrogen atmosphere and at the temperature of 100 ℃, and carrying out suction filtration on excessive pelargonic acid after the reaction is finished to prepare ring-opening epoxy resin;
(3) placing a mixture of 100 parts of polybutadiene polyol and 15 parts of ring-opening epoxy resin in a four-neck flask, stirring in a nitrogen atmosphere, adding 32 parts of hexamethylene diisocyanate, controlling the temperature at 80 ℃, and reacting for 5 hours to obtain an NCO-terminated polyurethane prepolymer, namely a component A;
(4) placing 20 parts of 2,2, 4-trimethyl-1, 3-pentanediol, 3 parts of polyacrylate copolymer BYK-356, 0.8 part of dibutyltin dilaurate, 32 parts of dimethyl phthalate, 12.2 parts of a coupling agent KH-540, 2 parts of a defoaming agent BYK-070 and the like into a flask, and uniformly mixing and stirring to obtain a component B;
(5) placing shale ceramsite sand and light calcium mineral powder in a 110 ℃ oven for 4h, removing water, and then cooling to room temperature. Then pouring the mixture into a stirring pot in proportion, stirring the mixture for 3min, and continuing adding the 4A molecular sieve, wherein the proportion of the shale ceramsite sand, the light calcium mineral powder and the 4A molecular sieve is 80: 20: 2, stirring for 3min until uniform to obtain a component C;
(6) pouring the component A, the component B and the component C into a stirring pot at room temperature, and stirring for 3min, wherein the component A: and B component: c component = 120: 42: 810, and obtaining the epoxy resin modified polyurethane concrete.
The density of the epoxy resin modified polyurethane concrete is 1.69 g/cm through testing 3 (ii) a The water seepage coefficient is 0 mL/min; the compressive strength is 36 MPa; the bonding strength of the epoxy resin modified polyurethane concrete and the steel plate is 5.9MPa at 25 ℃ without the action of a bonding agent; the bonding strength of the epoxy resin modified polyurethane concrete and the steel plate is 2.3MPa at 60 ℃ without the action of a bonding agent; the five-point bending fatigue times (overload) of the composite beam test piece are more than 100 ten thousand times.
Example 3
An epoxy resin modified polyurethane concrete and a preparation method thereof are as follows:
(1) polybutadiene polyalcohol and bisphenol A epoxy resin with epoxy equivalent of 216g/mol are respectively put into a three-neck flask, vacuum dehydration is carried out for 3h at 110 ℃, when no obvious bubbles are generated in the raw materials, the vacuum dehydration is continued for 1h, and then the water in the materials can be removed.
(2) Adding excessive heptanoic acid into bisphenol A epoxy resin with the epoxy equivalent of 216g/mol, carrying out catalytic reaction for 6 hours under the protection of nitrogen atmosphere and at the temperature of 100 ℃, and carrying out suction filtration on the excessive heptanoic acid after the reaction is finished to obtain the ring-opening epoxy resin.
(3) Placing a mixture of 100 parts of polybutadiene polyol and 18 parts of ring-opening epoxy resin in a four-neck flask, stirring in a nitrogen atmosphere, adding 37.5 parts of isophorone diisocyanate, controlling the temperature at 80 ℃, and reacting for 5 hours to obtain an NCO-terminated polyurethane prepolymer, namely the component A.
(4) 22 parts of 2-butyl-2-ethyl-1, 3-propylene glycol, 4 parts of polyacrylate copolymer BYK-359, 1.0 part of dimethyltin dilaurate, 40 parts of dihexyl phthalate, 10 parts of coupling agent KH-792, 3 parts of defoaming agent BYK-141 and the like are placed in a flask, and are mixed and stirred uniformly to obtain a component B.
(5) Placing clay ceramsite sand and light calcium mineral powder in a 110 ℃ oven for 4h, removing water, and then cooling to room temperature. Then pouring the mixture into a stirring pot according to the proportion, stirring the mixture for 4min, and continuously adding a 4A molecular sieve, wherein the proportion of the clay ceramsite sand, the light calcium mineral powder and the 4A molecular sieve is 60: 40: and 1, stirring for 4min until the mixture is uniform to obtain a component C.
(6) Pouring the component A, the component B and the component C into a stirring pot at room temperature, and stirring for 4min, wherein the component A: and B component: c component = 110: 44: 616 to obtain the epoxy resin modified polyurethane concrete.
The test shows that the density of the epoxy resin modified polyurethane concrete is 1.70 g/cm 3 (ii) a The water seepage coefficient is 0 mL/min; the compressive strength is 35 MPa; under the temperature of 25 ℃ and without the action of an adhesive, the adhesive strength of the epoxy resin modified polyurethane concrete and the steel plate is 5.3 MPa;under the temperature of 60 ℃ and without the action of an adhesive, the adhesive strength of the epoxy resin modified polyurethane concrete and the steel plate is 2.0 MPa; the five-point bending fatigue times (overload) of the composite beam test piece are more than 100 ten thousand times.
In conclusion, the density of the conventional steel bridge deck pavement concrete is 2.4-2.5 g/cm 3 The density of the epoxy resin modified polyurethane concrete prepared by the scheme is 1.7 g/cm 3 Compared with the conventional concrete, the density is reduced by about 1/3, the compressive strength is higher than 30MPa, the mechanical property is far better than that of the conventional concrete, and the light weight and high strength of the steel bridge deck pavement layer are realized. The water seepage coefficient is 0 mL/min, the pavement layer can be ensured not to seep water, and the waterproof performance is excellent. Under the condition of brushing the binder, the normal temperature bonding strength of the conventional concrete and the steel plate is not lower than 1.5MPa, and the high temperature bonding strength is not specified. The bonding strength of the epoxy resin modified polyurethane concrete prepared by the scheme and a steel plate at normal temperature and high temperature is higher than 1.5MPa under the condition that the bonding agent is not coated, and the bonding performance is obviously improved. The times of five-point bending fatigue of a composite beam test piece of epoxy resin modified polyurethane concrete and a steel plate under overload are more than 100 ten thousand, and the existing specification only requires that the times of five-point bending fatigue under standard load are more than 100 ten thousand. Meanwhile, the epoxy resin modified polyurethane concrete has good fluidity and is directly paved at normal temperature by depending on the self fluidity.
Claims (10)
1. An epoxy resin modified polyurethane concrete comprises A, B, C three components, and is characterized in that:
the component A is an NCO-terminated polyurethane prepolymer;
the component B is a mixture of a chain extender, a flatting agent and a functional auxiliary agent;
the component C is a mixture of light aggregate, light calcium mineral powder and a molecular sieve;
A. b, C, the weight ratio of the three components is 90-130: 20-60: 350-1200.
2. The epoxy resin-modified polyurethane concrete according to claim 1, characterized in that: the proportion of the light aggregate, the light calcium mineral powder and the molecular sieve is 60-90: 10-40: 1 to 5.
3. The epoxy resin-modified polyurethane concrete according to claim 1 or 2, characterized in that: the light aggregate in the component C is at least one of fly ash ceramsite sand, shale ceramsite sand and clay ceramsite sand, and the particle size of the light aggregate is not more than 4.75 mm.
4. The epoxy resin-modified polyurethane concrete according to claim 3, characterized in that: the leveling agent is polyacrylate copolymer.
5. The epoxy resin-modified polyurethane concrete according to any one of claims 1 to 4, characterized in that: the NCO-terminated polyurethane prepolymer comprises epoxy resin, organic acid, polyolefin polyol and polyisocyanate.
6. The epoxy resin-modified polyurethane concrete according to claim 5, characterized in that: the polyolefin polyol is a polybutadiene polyol.
7. The epoxy resin-modified polyurethane concrete according to any one of claims 1 to 6, characterized in that: the chain extender is a diol chain extender, and the diol chain extender is at least one of 1, 4-butanediol, 2-ethyl-1, 3-hexanediol, 2, 4-trimethyl-1, 3-pentanediol and 2-butyl-2-ethyl-1, 3-propanediol.
8. The epoxy resin-modified polyurethane concrete according to claim 7, wherein: the functional auxiliary agent in the component B comprises an organic tin catalyst, a phthalate ester plasticizer, a coupling agent and a defoaming agent.
9. The epoxy resin-modified polyurethane concrete according to claim 8, characterized in that: the ratio of the leveling agent to the chain extender to the organic tin catalyst to the phthalate ester plasticizer to the coupling agent to the defoaming agent in the component B is 2-6: 10-35: 0.5-1.5: 15-55: 6-16: 1 to 5.
10. The method for producing an epoxy resin-modified polyurethane concrete according to any one of claims 5 to 9, characterized in that:
(1) respectively dehydrating polyolefin polyol and epoxy resin in vacuum to remove water in the materials;
(2) adding excessive organic acid into the epoxy resin, performing catalytic reaction for 4-6 hours at the temperature of 90-120 ℃ under the protection of nitrogen atmosphere to obtain ring-opening epoxy resin;
(3) stirring a mixture of polyolefin polyol and ring-opening modified epoxy resin in a nitrogen atmosphere, adding polyisocyanate in proportion, controlling the temperature at 70-90 ℃, and reacting for 3-6 h to obtain an NCO-terminated polyurethane prepolymer, namely a component A;
(4) mixing and stirring the chain extender, the flatting agent and the functional auxiliary agent uniformly to obtain a component B;
(5) removing water from the lightweight aggregate and the lightweight calcium ore powder, and then cooling to room temperature; then, after mixing and stirring uniformly according to the proportion, continuously adding the molecular sieve, and stirring uniformly to obtain a component C;
(6) and (3) mixing and stirring the component A, the component B and the component C uniformly at room temperature to obtain the epoxy resin modified polyurethane concrete.
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