CN115925317A - Concrete apparent quality modifier attached to oily release agent and preparation method thereof - Google Patents
Concrete apparent quality modifier attached to oily release agent and preparation method thereof Download PDFInfo
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- CN115925317A CN115925317A CN202211413844.XA CN202211413844A CN115925317A CN 115925317 A CN115925317 A CN 115925317A CN 202211413844 A CN202211413844 A CN 202211413844A CN 115925317 A CN115925317 A CN 115925317A
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- organic silicon
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- 239000004567 concrete Substances 0.000 title claims abstract description 89
- 239000003607 modifier Substances 0.000 title claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000000178 monomer Substances 0.000 claims abstract description 34
- 239000000839 emulsion Substances 0.000 claims abstract description 33
- 239000012188 paraffin wax Substances 0.000 claims abstract description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 30
- 239000010703 silicon Substances 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 13
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims abstract description 10
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims abstract description 10
- 229940044172 calcium formate Drugs 0.000 claims abstract description 10
- 235000019255 calcium formate Nutrition 0.000 claims abstract description 10
- 239000004281 calcium formate Substances 0.000 claims abstract description 10
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 229940124274 edetate disodium Drugs 0.000 claims abstract 2
- 229960001866 silicon dioxide Drugs 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- YGZSVWMBUCGDCV-UHFFFAOYSA-N chloro(methyl)silane Chemical compound C[SiH2]Cl YGZSVWMBUCGDCV-UHFFFAOYSA-N 0.000 claims description 3
- GTPDFCLBTFKHNH-UHFFFAOYSA-N chloro(phenyl)silicon Chemical compound Cl[Si]C1=CC=CC=C1 GTPDFCLBTFKHNH-UHFFFAOYSA-N 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- ZOYFEXPFPVDYIS-UHFFFAOYSA-N trichloro(ethyl)silane Chemical compound CC[Si](Cl)(Cl)Cl ZOYFEXPFPVDYIS-UHFFFAOYSA-N 0.000 claims description 3
- 239000005053 propyltrichlorosilane Substances 0.000 claims description 2
- OOXSLJBUMMHDKW-UHFFFAOYSA-N trichloro(3-chloropropyl)silane Chemical compound ClCCC[Si](Cl)(Cl)Cl OOXSLJBUMMHDKW-UHFFFAOYSA-N 0.000 claims description 2
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 claims description 2
- DOEHJNBEOVLHGL-UHFFFAOYSA-N trichloro(propyl)silane Chemical compound CCC[Si](Cl)(Cl)Cl DOEHJNBEOVLHGL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005050 vinyl trichlorosilane Substances 0.000 claims description 2
- UZBDLHYCYNXFRF-UHFFFAOYSA-N chloro(prop-1-enyl)silane Chemical compound C(=CC)[SiH2]Cl UZBDLHYCYNXFRF-UHFFFAOYSA-N 0.000 claims 1
- 230000008030 elimination Effects 0.000 abstract description 2
- 238000003379 elimination reaction Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 21
- 239000000243 solution Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000010276 construction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000006082 mold release agent Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- ZHPNWZCWUUJAJC-UHFFFAOYSA-N fluorosilicon Chemical compound [Si]F ZHPNWZCWUUJAJC-UHFFFAOYSA-N 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 241000264877 Hippospongia communis Species 0.000 description 1
- 206010051788 Sticky skin Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- NELRINSZCVVEAD-UHFFFAOYSA-N chloro-ethenyl-methylsilane Chemical compound C[SiH](Cl)C=C NELRINSZCVVEAD-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention discloses a concrete apparent quality modifier attached to an oily release agent and a preparation method thereof. The concrete apparent quality modifier is prepared by uniformly dispersing an organic silicon monomer solution, nano graphene oxide and modified nano paraffin emulsion by ultrasonic; the organic silicon monomer solution is obtained by mixing an organic silicon monomer and ethanol; the modified paraffin emulsion is obtained by uniformly dispersing nano paraffin emulsion, nano graphite particles, nano silicon dioxide, edetate disodium and calcium formate through ultrasonic after mixing. By spraying the modifier on the surface of the oily release agent, the modifier can promote the elimination of air bubbles on the surface of concrete, stabilize the water-oil phase in a separated state, improve the surface quality of the concrete and facilitate the release of the concrete.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a concrete apparent mass modifier attached to an oily release agent and a preparation method thereof.
Background
Along with the development of urbanization, the increase of the consumption of concrete and the strict requirements of engineering on the quality of concrete, the apparent quality problem of concrete buildings is more and more emphasized. The apparent quality of concrete has become an important content of construction control and also becomes a focus of attention of a plurality of construction units and supervision units. However, the concrete construction engineering in China pays attention to the quality of the engineering structure for a long time, and neglects the apparent quality, so that the concrete structure often has quality problems of cavities, gap slag inclusion, uneven pits, honeycombs, pitted surfaces, sand spots, yarns, leaked stones, sticky skins and the like, and the apparent quality problems finally influence the durability indexes of the concrete, such as the sulfate erosion resistance, the frost resistance and the like, and influence the engineering life, so that the improvement of the apparent quality of the concrete of the construction engineering is of great importance. Concrete surface defects can generally be determined visually, and once defects adversely affect quality, the apparent state is poor. The apparent defects generally include poor performance of mixture caused by unreasonable design of the mixing proportion of the performances of raw materials, poor air exhaust effect, incompact and layering of concrete caused by irregular construction operation process, improper design, material selection and manufacture or installation of construction templates, improper use of stripping materials, especially unreasonable use of a release agent and an additive, improper stripping and maintenance, powder generation on the surface of concrete and the like. In the reasons, the mixing proportion design can adjust the state of the mixture through redesign, and can also avoid the influence of irregular operation on the concrete appearance quality through standard construction and maintenance processes, so that the application of the release agent is greatly influenced.
The current mold release agents mainly include aqueous mold release agents and oily mold release agents. The release agent is mainly coated on the inner surface of a concrete template to reduce the adhesive force between the concrete and the template, so that the concrete is easy to separate, the concrete is not damaged when being released due to the fact that the initial strength of the concrete is too low, the surface of the concrete is kept smooth, the template can be protected, deformation or corrosion of the template can be prevented, cleaning is convenient, and repair cost is reduced, and therefore the release agent needs to meet the following requirements: (1) good demoulding performance; (2) convenient coating, fast molding and easy cleaning after mold removal; (3) the decorative effect of the concrete surface is not influenced, and impregnation marks and yellow discoloration are not left on the concrete surface; (4) the concrete admixture does not pollute reinforcing steel bars, is harmless to concrete, does not influence the bond stress of the concrete and the reinforcing steel bars, does not change the setting time of the concrete mixture, and does not contain substances harmful to the performance of the concrete; (5) the template is protected, and the service life of the template is prolonged; (6) the stability is better; (7) has better water resistance and weather resistance. The existing release agent generally has the problems of adhesion with concrete, unsatisfactory release effect, incapability of improving the apparent quality of concrete, short service life of a mould and the like, and particularly aims at the problem that an oil-based release agent has an oil-water mixture on an interface in the using process and seriously affects the apparent quality of concrete.
Disclosure of Invention
Based on the existing problems, the invention provides a concrete apparent quality modifier attached to an oily release agent and a using method thereof in order to overcome the defects of the prior art. The modifier can promote the elimination of concrete surface bubbles, stabilize the water-oil phase in a separated state, improve the concrete surface quality and facilitate demolding.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a concrete apparent mass modifier attached to an oily release agent is obtained by uniformly dispersing an organic silicon monomer solution, nano graphene oxide and modified nano paraffin emulsion by ultrasonic;
the organic silicon monomer solution is obtained by mixing an organic silicon monomer and ethanol;
the modified paraffin emulsion is obtained by mixing nano paraffin emulsion, nano graphite particles, nano silicon dioxide, disodium edetate and calcium formate and then uniformly dispersing by ultrasonic;
the raw material components are as follows in parts by mass:
the ethanol is absolute ethanol.
The organic silicon monomer is selected from more than one of methyl chlorosilane, phenyl chlorosilane, methyl vinyl chlorosilane, ethyl trichlorosilane, propyl trichlorosilane, vinyl trichlorosilane, gamma-chloropropyl trichlorosilane and fluorine silicon monomer.
The nano graphene oxide can perform a grafting reaction with an alcoholysis solution of an organic silicon monomer, and further products under the alkaline condition of concrete are beneficial to improving the corrosion resistance and wear resistance of a demoulding material, can improve the surface interface, improve the surface tension of interface liquid, play a defoaming role and promote the interface to be flat and smooth. Meanwhile, the slurry in the concrete mixture can be led to the surface, the hydration reaction and the water retention on the surface of the concrete are improved, the apparent quality is improved, and the demolding is convenient.
The nano paraffin emulsion disclosed by the invention wraps nano silicon dioxide, disodium edetate and calcium formate to form a mixed emulsion, and the mixed emulsion is a stable dispersoid. When the prepared modifier is contacted with organic solvents such as engine oil and the like, the nano paraffin emulsion is gradually dissolved in the organic solvents, nano silicon dioxide, disodium edetate, calcium formate, nano graphite particles, organic silicon monomers and alcoholization reactants are gradually released, wherein the substances such as the nano silicon dioxide, the disodium edetate, the calcium formate, the organic silicon monomers and the alcoholization reactants are mixed with slurry and gradually permeate into concrete under the conditions of alkalinity and water, so that the filling and the reinforcement of pores in the concrete are realized, and the chemical reaction is carried out on the substances and the products in the concrete, thereby realizing the filling and the reinforcement of pits on the surface of the concrete and improving the apparent quality of the concrete.
The surface is more smooth due to the ball effect of the nano paraffin particles; the nano graphite particles can realize the separation between the oily release agent and the concrete slurry water, and improve the smoothness of the surface.
Particularly, the organic silicon monomer solution grafted and modified by the graphene can improve defoaming capability, further improve surface tension of interface liquid, accelerate migration of slurry from the inside to the surface, provide a channel for penetration of modified emulsion formed by wrapping in paraffin emulsion, improve penetration depth, accelerate participation of the modified emulsion in slurry reaction, and further improve apparent quality. Meanwhile, the graphene can delay the cement hydration reaction on the surface, so that the reaction is more uniform, and the surface can be promoted to be more compact.
The invention also provides a preparation method of the concrete apparent quality modifier attached to the oily release agent, which comprises the following steps:
(1) Mixing an organic silicon monomer with ethanol to form an organic silicon monomer solution;
(2) Adding nano graphene oxide into the organic silicon monomer solution obtained in the step (1), and continuing to perform ultrasonic dispersion uniformly at the temperature of 50-70 ℃ for 3-5 hours;
(3) And (3) adding the solution obtained in the step (2) into the modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain the concrete apparent quality modifier.
When the application method of the concrete apparent quality modifier is used, the modifier is directly sprayed on the surface of an oily release agent by a spraying device, and the mixing amount of the modifier is not more than 2% of the mass of a gelled material in concrete.
The invention has the following beneficial effects:
one of the main components in the concrete apparent quality modifier is nano paraffin emulsion, the paraffin emulsion can be used as a concrete release agent, the action mechanism of the concrete apparent quality modifier is isolation and lubrication, the concrete apparent quality modifier also has a good demoulding effect, but the concrete apparent quality modifier is not suitable for dilution and uniform coating, and particularly the paraffin content is high, so that the paraffin emulsion can remain on the surface of concrete to influence the apparent quality of the concrete. But in the invention, through the modification measures of the nano paraffin emulsion: through the isolation effect of the nano graphite and the interaction of the nano silicon dioxide, the disodium edetate, the calcium formate, the organic silicon monomer and the alcoholization reactant, the complete separation of the paraffin and the concrete can be better realized, the wear resistance of an interface is improved, and the demolding is easy and is not easy to remain.
The specific implementation mode is as follows:
hereinafter, embodiments of the present invention will be described in detail. This invention may, however, be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. Rather, these embodiments are provided to explain the principles of the invention and its practical application to thereby enable others skilled in the art to understand the invention for various embodiments and with various modifications as are suited to the particular use contemplated.
The parts in each example are parts by mass.
Comparative example 1
Comparative example 1 is C30 concrete without modifier sprayed on the surface of oily release agent, and the release agent used in molding is engine oil.
Comparative example 2
Comparative example 2 differs from comparative example 1 in that the release agent used was a silicone oil-based release agent.
Comparative example 3
The difference between the comparative example 3 and the example 1 is that the sprayed modifier is not added with the graphene oxide, and the doping amount of the modifier is 1 percent of the using amount of the cementing material.
Comparative example 4
The difference between the comparative example 4 and the example 1 is that the nano paraffin emulsion is not added into the sprayed modifier, and the mixing amount of the modifier is 1 percent of the using amount of the cementing material.
Example 1
A method for preparing a concrete apparent quality modifier attached to an oily release agent, comprising:
(1) Mixing 20 parts of organic silicon monomer and 50 parts of absolute ethyl alcohol to form organic silicon monomer solution;
(2) Adding 3 parts of nano graphene oxide, continuing to perform ultrasonic dispersion uniformly at 50 ℃, and keeping for 3 hours;
(3) Adding the solution into modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain a modifier;
the organic silicon monomer is methyl chlorosilane;
the modified paraffin emulsion is obtained by uniformly mixing 90 parts of nano paraffin emulsion, 20 parts of nano graphite particles, 10 parts of nano silicon dioxide, 5 parts of disodium edetate and 10 parts of calcium formate and then uniformly dispersing by ultrasonic.
The concrete apparent mass modifier is directly sprayed on the surface of the oily release agent by adopting a spraying device, and is added with 1 percent of the concrete cementing material mass on the basis of the comparative example 1.
Example 2
A method for preparing a concrete apparent quality modifier attached to an oily release agent, comprising:
(1) Mixing 25 parts of organic silicon monomer and 50 parts of absolute ethyl alcohol to form organic silicon monomer solution;
(2) Adding 5 parts of nano graphene oxide, continuing to perform ultrasonic dispersion uniformly at 70 ℃, and keeping for 5 hours;
(3) Adding the solution into modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain a modifier;
the organic silicon monomer is phenyl chlorosilane;
the modified paraffin emulsion is obtained by uniformly mixing 80 parts of nano paraffin emulsion, 10 parts of nano graphite particles, 5 parts of nano silicon dioxide, 3 parts of disodium edetate and 5 parts of calcium formate and then uniformly dispersing by ultrasonic.
The concrete apparent mass modifier is directly sprayed on the surface of the oily release agent by adopting a spraying device, and is added with 1 percent of the concrete cementing material mass on the basis of the comparative example 2.
Example 3
A method for preparing a concrete apparent quality modifier attached to an oily release agent, comprising:
(1) Mixing 23 parts of organic silicon monomer with 50 parts of absolute ethyl alcohol to form organic silicon monomer solution;
(2) Adding 4 parts of nano graphene oxide, continuing to perform ultrasonic dispersion uniformly at the temperature of 60 ℃, and keeping for 4 hours;
(3) Adding the solution into modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain a modifier;
the organic silicon monomer is prepared from ethyl trichlorosilane and a fluorine-silicon monomer according to the mass ratio of 1:1, mixing;
the modified paraffin emulsion is obtained by uniformly mixing 85 parts of nano paraffin emulsion, 15 parts of nano graphite particles, 8 parts of nano silicon dioxide, 4 parts of disodium edetate and 7 parts of calcium formate and then uniformly dispersing by ultrasonic.
The concrete apparent mass modifier is directly sprayed on the surface of the oily release agent by adopting a spraying device, and is added with 1 percent of the concrete cementing material mass on the basis of the comparative example 1.
Application examples
The concrete compounding ratios used in the above examples and comparative examples are shown in table 1 below:
TABLE 1C30 basic mix proportions of concrete
| Cement | Fly ash | Mineral powder | Sand | Stone (stone) | Water (I) | Polycarboxylic acid water reducing agent |
| 240 | 85 | 55 | 828 | 1012 | 170 | 1％ |
The demolding performance is tested according to JC/T949-2005 release agent for concrete products, the concrete resilience strength is tested according to JGJ/T23-2011 technical specification for testing the concrete compressive strength by a rebound method, and the obtained results are shown in Table 2:
TABLE 2 Release agent and concrete Properties
The results in table 2 show that after the modifier is sprayed, the demolding performance of the concrete demolding agent is obviously improved, the rebound strength of the concrete is improved, the surface brightness is increased, the water absorption rate is obviously reduced, and the improvement effect is obvious.
Compared with the example 1, the comparative example 1 only adopts the release agent machine oil, so that the release performance is general, the rebound strength is low, the surface brightness is low, and the water absorption is high;
compared with the embodiment 2, the comparative example 2 only adopts the silicone oil type oily mold release agent, so that the mold release performance is poor, the rebound strength is low, the surface brightness is low, and the water absorption rate is high;
compared with the embodiment 1 and the comparative example 1, the modifier without the added graphene oxide is adopted in the comparative example 3, the demolding performance is general, and the rebound strength, the surface brightness and the water absorption are all between the embodiment 1 and the comparative example 1;
compared with the example 1 and the comparative example 1, the modifier without the nano paraffin emulsion is adopted in the comparative example 4, the demolding performance is general, and the rebound strength, the surface brightness and the water absorption are all between the example 1 and the comparative example 1.
Claims (5)
1. The concrete apparent mass modifier attached to the oily release agent is characterized by being prepared by uniformly dispersing an organic silicon monomer solution, nano graphene oxide and modified nano paraffin emulsion by ultrasonic waves;
the organic silicon monomer solution is obtained by mixing an organic silicon monomer and ethanol;
the modified paraffin emulsion is obtained by uniformly dispersing nano paraffin emulsion, nano graphite particles, nano silicon dioxide, edetate disodium and calcium formate through ultrasonic after mixing;
the raw material components are as follows in parts by mass:
2. the concrete apparent quality modifier attached to an oil-based release agent according to claim 1, wherein the ethanol is absolute ethanol.
3. The concrete appearance quality modifier attached to an oily release agent according to claim 1, characterized in that the organosilicon monomer is a mixture of any one or more of methylchlorosilane, phenylchlorosilane, methylvinylchlorosilane, ethyltrichlorosilane, propyltrichlorosilane, vinyltrichlorosilane, γ -chloropropyltrichlorosilane and fluorosilicone monomer.
4. A process for producing a concrete apparent quality modifier attached to an oil-based release agent according to any one of claims 1 to 3, comprising:
(1) Mixing an organic silicon monomer with ethanol to form an organic silicon monomer solution;
(2) Adding nano graphene oxide into the organic silicon monomer solution obtained in the step (1), and continuing to perform ultrasonic dispersion uniformly at the temperature of 50-70 ℃ for 3-5 hours;
(3) And (3) adding the solution obtained in the step (2) into the modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain the concrete apparent quality modifier.
5. The method for applying the concrete apparent mass modifier attached to the oil-based release agent according to any one of claims 1 to 3, wherein the concrete apparent mass modifier is used by directly spraying the concrete apparent mass modifier on the surface of the oil-based release agent by using a spraying device, and the amount of the concrete apparent mass modifier is not more than 2% of the mass of the gelled material in the concrete.
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| CN112404342A (en) * | 2020-11-09 | 2021-02-26 | 和县科嘉阀门铸造有限公司 | Treatment process of die-casting mold cavity before spraying of powdery release agent |
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| JP2006015366A (en) * | 2004-07-01 | 2006-01-19 | Nicca Chemical Co Ltd | Aqueous releasing agent for low speed injection casting |
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