CN105712655A - Functional concrete admixture and preparation method and application thereof - Google Patents
Functional concrete admixture and preparation method and application thereof Download PDFInfo
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- CN105712655A CN105712655A CN201511020283.7A CN201511020283A CN105712655A CN 105712655 A CN105712655 A CN 105712655A CN 201511020283 A CN201511020283 A CN 201511020283A CN 105712655 A CN105712655 A CN 105712655A
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- 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
Abstract
The invention provides a functional concrete admixture and a preparation method and application thereof. The functional concrete admixture is composed of epoxy modified polysiloxane, polypropylmethylsilsesquioxane, alkoxy silane, nano silica, nano titanium dioxide, fatty amine polyoxyethylene ether and polyoxyethylene fatty acid. Components of the functional concrete admixture are in effective combination, generate synergistic effects and overcome respective defects, transmission of erosion media in a severe environment is efficiently inhibited, concrete electric flux is decreased, chlorine salt erosion resistance of concrete is improved, and accordingly durability of concrete is improved remarkably.
Description
Technical field
The present invention relates to concrete admixture, specifically a kind of functional concrete admixture and its preparation method and application.
Background technology
Concrete admixture is to mix in ready-mixed concrete process, accounts for cement quality less than 5%, can significantly improve the chemical substance of concrete performance, mixes additive in concrete, has small investment, instant effect, technical economic benefit outstanding feature.Along with the continuous progress of science and technology, additive has been increasingly being application, and in engineering, conventional additive can be divided into four classes:
1, the additive of concrete mix rheological property is improved.Including water reducer, air entraining agent and pumping admixture.
2, the additive of concrete coagulating time, hardening capacity is regulated.Including retarder, early strength agent and accelerator.
3, the additive of concrete durability is improved.Including air entraining agent, waterproofing agent and corrosion inhibitor etc..
4, the additive of other performances of concrete is improved.Including air-entrainment, extender, antifreezing agent, coloring agent.
These additives have the advantages that to improve a certain performance of concrete.
There is presently no a kind of functional additive to be exploited for solving concrete corrosion-resistant property under adverse circumstances.In the presence of a harsh environment, owing to the chloride ion in surrounding medium or the chloride ion in concrete raw material penetrate into around reinforcing bar; the passivating film of reinforcing bar is destroyed after reaching finite concentration; cause steel bar corrosion; cut down its effective cross-section; reduce the stress performances such as its adhesion strength; make concrete cover along muscle spalling, be the Major Diseases affecting concrete structure durability, caused most attention both domestic and external.
Adopt for preventing the resistance to chloride erosion of concrete method to be improved strength grade of concrete during current engineering design, increase thickness of concrete cover or in concrete surface brushing resistant to corrosion coating; but all there is obvious drawback in these methods, it does not have fundamentally suppress etching medium in the transmission of inside concrete.The concrete approach of such as Chloride Attack generally has two kinds: the first " is mixed into ", and as mixed chloride ion-containing additive, construction water chloride ion-containing, in saline environment, mixing pours into a mould concrete etc.；It two is " infiltration ", and the chloride ion in environment is penetrated in concrete by concrete macroscopic view, microdefect, and arrives rebar surface." it is mixed into " problem that phenomenon is mostly construction management；" infiltration " phenomenon is then polytechnic problem, and with concrete material porous, density, construction quality, the many factors such as rebar surface concrete layer thickness is relevant.
Summary of the invention
It is an object of the invention to overcome shortcoming in prior art, fundamentally suppress etching medium in the transmission of inside concrete, a kind of functional concrete admixture and its preparation method and application is provided, concrete charge pass can being reduced, improving the resistance to chloride erosion performance of concrete, suppressing etching medium under adverse circumstances to corrode, thus significantly improving concrete durability.
In the present invention, adopt multiple elements design technology, first by epoxy-modified polysiloxane, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, nano silicon, nano titanium oxide, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester effectively combines, utilize epoxy-modified polysiloxane, alkoxy silane, nano silicon, nano titanium oxide and the concrete reactivity of alkalescence, increase this additive material cement reaction site quantity in mix process, utilize nano silicon, nano titanium oxide, the nano-filled Pinhole closure of poly-hydroxypropyl methyl silsesquioxane, reduce concrete pore rate thus improving compactness, utilize aliphatic acid polyethenoxy base ether, the diffusion activity that aliphatic acid polyethenoxy base ester is unique, be conducive to this additive material dispersed in concrete mixing process, avoid reuniting.Each component effectively combines and produces cooperative effect, overcomes its respective shortcoming, efficiently suppressing etching medium transmission under adverse circumstances, reducing concrete charge pass, improving concrete resistance to chloride erosion performance thus significantly improving concrete durability.
Functional concrete admixture of the present invention, in parts by weight, comprises consisting of:
Described epoxy-modified polysiloxane is with bisphenol-A epoxy resin under dibutyl tin laurate high-temperature catalysis, is obtained by reacting with PSI, the viscosity low-viscosity (mobile) liquid less than 100Pa.s；
The molecular structure of described bisphenol-A epoxy resin is similar to bisphenol A type epoxy resin, but is changed into hexatomic ring owing to phenyl ring is hydrogenated, therefore hydrogenated bisphenol A epoxy resin is without double bond.
Compared with bisphenol A type epoxy resin and alicyclic epoxy resin, bisphenol-A epoxy resin has that viscosity is little, the feature of weatherability and chemical proofing.Bisphenol-A epoxy resin contains ehter bond equally, and epoxy radicals is connected on the ehter bond of side chain and has good structural symmetry, so having the cementability of excellence, mechanical property and Corrosion Protection.
Described poly-hydroxypropyl methyl silsesquioxane is to obtain through hydrolysis after-condensation with MTES, propyl-triethoxysilicane.
Described alkoxy silane contains following components: MTES, butyl trimethoxy silane, butyl triethoxysilane, octyl group trimethoxy silane, octyltri-ethoxysilane, isooctyltrimethoxysi,ane, dodecyltrimethoxysilane and/or dodecyl triethoxysilane.
One or more arbitrary proportions mixing in lauryl amine polyoxyethylene ether, 18-amine. polyoxyethylene ether of the described aliphatic amine polyoxyethylene base ether.
Described aliphatic acid polyethenoxy base ester is selected from stearic acid polyoxyethylene base ester, lauric acid polyoxyethylene groups ester, the mixing of oleic acid one or more arbitrary proportions of polyoxyethylene groups ester.
The preparation method of described epoxy-modified polysiloxane is: be respectively placed in container by bisphenol-A epoxy resin, PSI, rotary evaporation 30min at 80 DEG C, removes moisture, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube reaction vessel in add bisphenol-A epoxy resin and siloxanes, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, it is continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid, is described epoxy-modified polysiloxane.
The preparation method of described poly-hydroxypropyl methyl silsesquioxane is: have in the reaction vessel of agitator, reflux condensing tube, thermometer at device, adds MTES, propyl-triethoxysilicane, 0.0lmol/L hydrochloric acid, isopropanol；After magnetic agitation is reacted l hour at 60 DEG C, add ammonia, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, namely obtain poly-hydroxypropyl methyl silsesquioxane.
Described concrete admixture material having reduction concrete charge pass, improving concrete resistance to chloride erosion performance, suppressing etching medium under adverse circumstances to corrode thus significantly improving the effect of concrete durability.
The preparation method of functional concrete admixture of the present invention is: be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
The application process of functional concrete admixture of the present invention is: add in concrete mixing process, and consumption 1-5kg recommended by every side concrete, uses with the uniform after-pouring of the mix such as adhesive material, aggregate.
Functional concrete admixture of the present invention suppresses etching medium to have a uniqueness and obvious action in inside concrete transmission in the presence of a harsh environment, it is possible to reduce concrete carbonization speed, electric flux, chloride permeability coefficient, it is provided that concrete impervious grade.The present invention is based on epoxide modified Si-O-Si structure, there is high stability and corrosion resistance, functional epoxy group and the effect improved concrete microporous structure of nano-scale, and the cooperative effect playing each component realizes suppressing etching medium transmission purpose, when compared with the similar material compositions without component disclosed by the invention, the present invention can be shown that the performance suppressing etching medium transmission dramatically increased.
Detailed description of the invention
Further illustrate the present invention by embodiment below, but the present invention is not intended to be limited thereto.
Embodiment 1
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 140ml, propyl-triethoxysilicane 60ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 2
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid..
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 140ml, propyl-triethoxysilicane 65ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 3
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 140ml, propyl-triethoxysilicane 60ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 4
1) prepared by epoxy-modified polysiloxane: weigh 70g bisphenol-A epoxy resin and 30g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 150ml, propyl-triethoxysilicane 70ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 5
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 160ml, propyl-triethoxysilicane 50ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 80.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 6
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 110ml, propyl-triethoxysilicane 160ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 15mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 7
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 150ml, propyl-triethoxysilicane 50ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 15mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 8
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 140ml, propyl-triethoxysilicane 60ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 9
1) prepared by epoxy-modified polysiloxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, is sequentially added into 80g containing hydrogen silicone oil, 3g allyl glycidyl ether, 125g allyl polyethenoxy polyethenoxy ether, logical N2Stirring 10min, is warming up to 90 DEG C, is added dropwise to platinum catalyst reaction 4h, obtains polyether/epoxy resin silicone oil intermediate.Then the ratio being 1.05: 1.00 with amine and polyether/epoxy resin silicone oil intermediate epoxy radicals mol ratio puts into N-aminoethyl piperazine and continues reaction 4h, decompression is except after low-boiling-point substance, it is down to room temperature, with hexamethylene/chloroform (weight ratio is 9: 1) mixed solvent washing impurity-removing, obtains viscous liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 120ml, propyl-triethoxysilicane 80ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 4.0mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Embodiment 10
1) prepared by epoxy-modified polysiloxane: weigh 60g bisphenol-A epoxy resin and 40g PSI is respectively placed in eggplant-shape bottle, rotary evaporation 30min at 80 DEG C, removes a small amount of moisture contained in raw material, is cooled to room temperature, standby.Equipped with mechanical agitation, charging hopper, reflux condensing tube there-necked flask in add 60g bisphenol-A epoxy resin and 40g PSI, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, being continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid.
2) preparation of poly-hydroxypropyl methyl silsesquioxane: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, add MTES 165ml, propyl-triethoxysilicane 55ml, 0.0lmol/L hydrochloric acid 20mL, at isopropanol 100.0mL60 DEG C, magnetic agitation adds ammonia 8mL after reacting l hour, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, obtain poly-hydroxypropyl methyl silsesquioxane.
3) preparation of described functional concrete admixture: have in the 1000mL three-necked bottle of agitator, reflux condensing tube, thermometer at device, be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
Application examples
Filling described functional concrete admixture, carry out contrast experiment after carrying out C40 concrete formation experiment, evaluate the erosion medium resistance rejection of material, result is as shown in table 1.Concrete sample processes through dry cleansing after 28d maintenance, and all test specimens carry out under same experimental conditions.Wherein seepage-resistant grade reference standard GB/T50082-2009 tests, water absorption rate reference standard BS1881:part122:1983 tests, chlorine ion binding capacity water suction is tested with reference to JTG/TB07-01-2006, and electric flux reference standard JTJ275-2000 tests.
Blank test specimen: be the concrete sample being not spiked with functional additive involved in the present invention.
Contrast 1: compare the embodiment 1 functional additive of gained, be not spiked with epoxy-modified polysiloxane, gained concrete sample.
Contrast 2: compare the embodiment 1 functional additive of gained, is not spiked with poly-hydroxypropyl methyl silsesquioxane and alkoxy silane, gained concrete sample.
Contrast 3: compare the embodiment 1 functional additive of gained, be not spiked with nano silicon and nano titanium oxide, gained concrete sample.
Contrast 4: compare the embodiment 1 functional additive of gained, be not spiked with aliphatic amine polyoxyethylene base ether and the obtained concrete of aliphatic acid polyethenoxy base ester, gained concrete sample.
Table 1 fills the concrete corrosion-resistant property contrast of this functional concrete admixture
Can be seen that when adopting blank sample or lacking the material of constituent part by data in upper table, the performances such as concrete carbonation depth, chloride diffusion coefficient, electric flux, water absorption rate are all poor, and after adopting functional additive involved in the present invention, significantly reduce concrete rate of water absorption, improve concrete hydrophobicity and suppress etching medium particularly chloride ion at concrete voids transmitting effect.It is thus possible to concrete corrosion-resistant property is greatly improved, thus significantly improving concrete durability.
Claims (5)
1. a functional concrete admixture, in parts by weight, comprises consisting of:
Epoxy-modified polysiloxane 20-40,
Poly-hydroxypropyl methyl silsesquioxane 5-10,
Alkoxy silane 5-10,
Nano silicon 1-5,
Nano titanium oxide 1-5,
Aliphatic amine polyoxyethylene base ether 1-5,
Aliphatic acid polyethenoxy base ester 1-5；
Described epoxy-modified polysiloxane is with bisphenol-A epoxy resin under dibutyl tin laurate high-temperature catalysis, is obtained by reacting with PSI；It it is the viscosity low-viscosity (mobile) liquid less than 100Pa.s；
Described poly-hydroxypropyl methyl silsesquioxane is to obtain through hydrolysis after-condensation with MTES, propyl-triethoxysilicane；
Described alkoxy silane contains following components: MTES, butyl trimethoxy silane, butyl triethoxysilane, octyl group trimethoxy silane, octyltri-ethoxysilane, isooctyltrimethoxysi,ane, dodecyltrimethoxysilane and/or dodecyl triethoxysilane；
One or more arbitrary proportions mixing in lauryl amine polyoxyethylene ether, 18-amine. polyoxyethylene ether of the described aliphatic amine polyoxyethylene base ether；
Described aliphatic acid polyethenoxy base ester is selected from stearic acid polyoxyethylene base ester, lauric acid polyoxyethylene groups ester, the mixing of oleic acid one or more arbitrary proportions of polyoxyethylene groups ester.
2. functional concrete admixture according to claim 1, it is characterized in that, the preparation method of described epoxy-modified polysiloxane is: be respectively placed in container by bisphenol-A epoxy resin, PSI, rotary evaporation 30min at 80 DEG C, remove moisture, it is cooled to room temperature, standby；
Equipped with mechanical agitation, charging hopper, reflux condensing tube reaction vessel in add bisphenol-A epoxy resin and siloxanes, stir and be warming up to 80 DEG C, then dibutyl tin laurate it is added dropwise over, it is continuously heating to 140 DEG C, constant temperature stirring 3.5h obtains clear viscous shape liquid, is described epoxy-modified polysiloxane.
3. functional concrete admixture according to claim 1, it is characterized in that, the preparation method of described poly-hydroxypropyl methyl silsesquioxane is: have in the reaction vessel of agitator, reflux condensing tube, thermometer at device, add MTES, propyl-triethoxysilicane, 0.0lmol/L hydrochloric acid, isopropanol；After magnetic agitation is reacted l hour at 60 DEG C, add ammonia, heat up 80 DEG C and continue reaction 1 hour, neutralize with hydrochloric acid, namely obtain poly-hydroxypropyl methyl silsesquioxane.
4. the preparation method of the functional concrete admixture described in any one in claims 1 to 3 is: be sequentially added into epoxy-modified polysiloxane at 25 DEG C, poly-hydroxypropyl methyl silsesquioxane, alkoxy silane, aliphatic amine polyoxyethylene base ether, aliphatic acid polyethenoxy base ester were warming up to 60 DEG C of mechanical agitation after 2 hours, after adding nano silicon, nano titanium oxide continuation stirring 30min, it is cooled to room temperature discharging, obtains described functional concrete admixture.
5. the application process of the functional concrete admixture described in any one in claims 1 to 3 is: add in concrete mixing process, and consumption 1-5kg recommended by every side concrete, uses with the uniform after-pouring of the mix such as adhesive material, aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511020283.7A CN105712655B (en) | 2015-12-29 | 2015-12-29 | A kind of functionality concrete admixture and its preparation method and application |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108706909A (en) * | 2018-06-11 | 2018-10-26 | 中交武汉港湾工程设计研究院有限公司 | A kind of pervious concrete Special modifier and preparation method thereof |
| CN108793818A (en) * | 2018-07-12 | 2018-11-13 | 青海民族大学 | A kind of additive and preparation method thereof improving concrete durability |
| CN109369137A (en) * | 2018-12-20 | 2019-02-22 | 石家庄市矿区宏源混凝土搅拌有限公司 | A kind of acid and alkali-resistance concrete |
| CN109399997A (en) * | 2018-09-04 | 2019-03-01 | 江苏兆佳建材科技有限公司 | A kind of urban construction strong concrete additive |
| CN112811867A (en) * | 2021-01-18 | 2021-05-18 | 涿州市恒旗建材有限公司 | Pervious concrete and preparation method thereof |
| CN113955967A (en) * | 2021-12-03 | 2022-01-21 | 山西科腾环保新材料股份有限公司 | Nano tackifying additive and preparation method thereof |
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| CN103275616A (en) * | 2013-06-06 | 2013-09-04 | 江苏博特新材料有限公司 | Environment-friendly water-based nano coating material used for concrete protection, and preparation method thereof |
| CN104559770A (en) * | 2014-11-24 | 2015-04-29 | 江苏苏博特新材料股份有限公司 | High-weather-proof and anti-icing polysiloxane material for concrete and preparation method of high-weather-proof and anti-icing polysiloxane material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108706909A (en) * | 2018-06-11 | 2018-10-26 | 中交武汉港湾工程设计研究院有限公司 | A kind of pervious concrete Special modifier and preparation method thereof |
| CN108793818A (en) * | 2018-07-12 | 2018-11-13 | 青海民族大学 | A kind of additive and preparation method thereof improving concrete durability |
| CN109399997A (en) * | 2018-09-04 | 2019-03-01 | 江苏兆佳建材科技有限公司 | A kind of urban construction strong concrete additive |
| CN109369137A (en) * | 2018-12-20 | 2019-02-22 | 石家庄市矿区宏源混凝土搅拌有限公司 | A kind of acid and alkali-resistance concrete |
| CN112811867A (en) * | 2021-01-18 | 2021-05-18 | 涿州市恒旗建材有限公司 | Pervious concrete and preparation method thereof |
| CN112811867B (en) * | 2021-01-18 | 2022-05-17 | 涿州市恒旗建材有限公司 | Pervious concrete and preparation method thereof |
| CN113955967A (en) * | 2021-12-03 | 2022-01-21 | 山西科腾环保新材料股份有限公司 | Nano tackifying additive and preparation method thereof |
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