CN115925317B - Concrete apparent mass modifier attached to oily release agent and preparation method thereof - Google Patents
Concrete apparent mass modifier attached to oily release agent and preparation method thereof Download PDFInfo
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- CN115925317B CN115925317B CN202211413844.XA CN202211413844A CN115925317B CN 115925317 B CN115925317 B CN 115925317B CN 202211413844 A CN202211413844 A CN 202211413844A CN 115925317 B CN115925317 B CN 115925317B
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- 239000004567 concrete Substances 0.000 title claims abstract description 88
- 239000003607 modifier Substances 0.000 title claims abstract description 47
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000178 monomer Substances 0.000 claims abstract description 34
- 239000000839 emulsion Substances 0.000 claims abstract description 31
- 239000012188 paraffin wax Substances 0.000 claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 20
- 239000010703 silicon Substances 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 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
- 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
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 10
- 239000010439 graphite 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
- 239000002245 particle Substances 0.000 claims abstract description 9
- 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 8
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 5
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000003921 oil Substances 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 21
- 239000000243 solution Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 8
- 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
- 239000004568 cement Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241000289690 Xenarthra Species 0.000 description 2
- 230000008859 change Effects 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
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000006872 improvement 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
- 239000006082 mold release agent Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000264877 Hippospongia communis Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 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
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion 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
- 239000006185 dispersion Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing 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
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005461 lubrication Methods 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
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000004383 yellowing 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 mass modifier attached to an oily release agent and a preparation method thereof. The concrete apparent mass modifier is prepared by uniformly dispersing organosilicon monomer solution, nano graphene oxide and modified nano paraffin emulsion by ultrasonic; the organic silicon monomer solution is obtained by mixing organic silicon monomers with ethanol; the modified paraffin emulsion is obtained by uniformly mixing nano paraffin emulsion, nano graphite particles, nano silicon dioxide, disodium edetate and calcium formate and then performing ultrasonic dispersion. The modifier disclosed by the invention is sprayed on the surface of the oily release agent, so that the removal of bubbles on the surface of the concrete can be promoted, the water and oil phases are stabilized in a separated state, the surface quality of the concrete is improved, and the release is facilitated.
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
With the development of town, the increasing of concrete dosage and the strict requirements of engineering on concrete quality are increasingly important to the apparent quality problem of concrete buildings. The apparent mass of concrete has become an important content of construction control and is also a focus of attention for many construction units and supervision units. 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 quality problems of hollowness, gap slag inclusion, pothole unevenness, honeycombs, pitting surfaces, sand buckle, yarns, stone leakage, sticky coats and the like often occur in the concrete structure, and finally, the apparent quality problems influence the durability indexes of the concrete such as sulfate erosion resistance, freezing resistance and the like, and influence the engineering service life, so that the improvement of the apparent quality of the concrete of the construction engineering is very important. Concrete apparent defects can generally be determined visually, and once defects adversely affect quality, the apparent state is poor. The reasons for the appearance defect generally comprise poor mixture performance caused by unreasonable mix proportion design attached to raw material performance, poor concrete exhaust effect, incompact, layering and other phenomena caused by nonstandard construction operation process, improper construction template design, material selection, manufacture or installation, improper use of stripping materials, especially unreasonable use of stripping agents and additives, improper stripping maintenance, powder rising on the surface of concrete and the like. In the reasons, the mixing proportion design can be used for adjusting the state of the mixture through redesign, and can also be used for avoiding the influence of irregular operation on the apparent quality of the concrete through standardizing the construction and maintenance processes, so that the application of the release agent is greatly influenced.
Current release agents mainly include aqueous release agents and oily release agents. The method is characterized in that the inner surface of the concrete template is coated with a release agent to reduce the binding force between the concrete and the template so as to be easy to separate, the concrete is not damaged during the demoulding because of the low initial strength of the concrete, the smooth surface of the concrete is maintained, the template can be protected, the deformation or rust is prevented, and the cleaning and the repair cost reduction are convenient, therefore, the release agent needs to meet the following requirements: ① Good demolding performance; ② The coating is convenient, the molding is quick, and the cleaning is easy after the mold is removed; ③ The decorative effect of the concrete surface is not affected, no impregnating mark and anti-yellowing color change are left on the concrete surface; ④ The concrete mixture does not pollute the steel bars, does not harm the concrete, does not influence the bond strength of the concrete and the 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 good; ⑦ Has better water resistance and weather resistance. The existing release agent generally has the problems that the adhesive is generated between the release agent and the concrete, the release effect is not ideal, the apparent quality of the concrete cannot be improved, the service life of a mold is short, and the like, and particularly the apparent quality of the concrete is seriously influenced by the phenomenon that an oil-water mixture exists at the interface in the use process of the oily release agent.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a concrete apparent mass modifier attached to an oily release agent and a use method thereof. The modifier can promote elimination of bubbles on the surface of the concrete, stabilize the water-oil phase in a separation state, improve the surface quality of the concrete and facilitate demoulding.
In order to solve the problems, the invention adopts the following technical scheme:
The concrete apparent mass modifier attached to the oily release agent is prepared by uniformly dispersing organosilicon monomer solution and nano graphene oxide and modified nano paraffin emulsion by ultrasonic;
The organic silicon monomer solution is obtained by mixing organic silicon monomers with ethanol;
The modified paraffin emulsion is obtained by uniformly mixing nano paraffin emulsion, nano graphite particles, nano silicon dioxide, disodium edetate and calcium formate and then performing ultrasonic dispersion;
The raw material components are as follows in parts by mass:
The ethanol is absolute ethanol.
The organic silicon monomer is selected from any one or more of methyl chlorosilane, phenyl chlorosilane, methyl vinyl chlorosilane, ethyl trichlorosilane, propyl trichlorosilane, vinyl trichlorosilane, gamma-chloropropyl trichlorosilane and fluorosilicone monomer.
The nano graphene oxide can be subjected to grafting reaction with an alcoholysis solution of an organosilicon monomer, and further products under the alkaline condition of concrete are favorable for improving the corrosion resistance and wear resistance of a demoulding material, and can improve the surface interface, improve the surface tension of interface liquid, play a role in defoaming and promote the interface to be flat and smooth. Meanwhile, slurry in the concrete mixture can be led to the surface, so that the hydration reaction and the water retention on the surface of the concrete are improved, the apparent quality is improved, and the demoulding is facilitated.
The nano paraffin emulsion disclosed by the invention is coated with nano silicon dioxide, disodium edetate and calcium formate to form mixed emulsion, and is a stable dispersion. When the prepared modifier contacts with an organic solvent such as engine oil, the nano paraffin emulsion is gradually dissolved in the organic solvent, nano silicon dioxide, disodium edentate, calcium formate, nano graphite particles, an organic silicon monomer and an alcoholization reactant are gradually released, wherein the substances such as the nano silicon dioxide, the disodium edentate, the calcium formate, the organic silicon monomer and the alcoholization reactant are mixed with the slurry, and gradually infiltrate into the concrete under the conditions of alkalinity and water to fill the internal pores of the concrete, and chemically react with products in the concrete to fill and reinforce the hollow holes on the surface of the concrete, thereby improving the apparent quality of the concrete.
The ball effect of the nano paraffin particles can enable the surface to be smoother; the nano graphite particles can realize the separation between the oily release agent and the concrete slurry water, and the smoothness of the surface is improved.
In particular, the graphene grafted and modified organic silicon monomer solution can improve defoaming capability, further improve surface tension of interface liquid, accelerate migration of slurry from inside to surface, provide a channel for permeation of modified emulsion formed by wrapping paraffin emulsion, improve permeation depth, accelerate participation of the modified emulsion in slurry reaction, and further improve apparent quality. Meanwhile, the graphene can delay the cement hydration reaction of 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 mass modifier attached to the oily release agent, which comprises the following steps:
(1) Mixing an organosilicon monomer with ethanol to form an organosilicon monomer solution;
(2) Adding nano graphene oxide into the organic silicon monomer solution obtained in the step (1), continuing to uniformly disperse by ultrasonic at 50-70 ℃ and keeping for 3-5 h;
(3) And (3) adding the solution obtained in the step (2) into modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain the concrete apparent mass modifier.
When the application method of the concrete apparent mass modifier is used, the concrete apparent mass modifier is directly sprayed on the surface of the oily release agent by adopting a spraying device, and the mixing amount of the concrete apparent mass modifier is not higher than 2% of the mass of a cementing material in the concrete.
The beneficial effects of the invention are as follows:
One of the main components of the concrete apparent mass modifier is nano paraffin emulsion, the paraffin emulsion can be used as a concrete release agent, the action mechanism is isolation and lubrication, and the concrete apparent mass modifier also has a good release effect, but is not suitable for dilution and even coating, and particularly the paraffin content is high, and residues are left on the surface of the concrete to influence the apparent mass of the concrete. However, the invention adopts the modification measure of nano paraffin emulsion: through the isolation effect of the nano graphite and the interaction of nano silicon dioxide, disodium edetate, calcium formate and organosilicon monomers and alcoholization reactants in the nano graphite, the complete separation of paraffin and 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 embodiment 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 so that others skilled in the art will be able 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 weight.
Comparative example 1
Comparative example 1 is C30 concrete in which no modifier was sprayed on the surface of an oily release agent, and the release agent used in molding was engine oil.
Comparative example 2
Comparative example 2 differs from comparative example 1 in that the mold release agent used was a silicone oil-based mold release agent.
Comparative example 3
The difference between comparative example 3 and example 1 is that the sprayed modifier is not added with graphene oxide, and the mixing amount of the modifier is 1% of the dosage of the cementing material.
Comparative example 4
Comparative example 4 differs from example 1 in that no nano paraffin emulsion was added to the sprayed modifier, and the amount of modifier added was 1% of the amount of cement.
Example 1
A method for preparing a concrete apparent mass modifier attached to an oily release agent, comprising:
(1) Mixing 20 parts of organic silicon monomer with 50 parts of absolute ethyl alcohol to form an organic silicon monomer solution;
(2) Adding 3 parts of nano graphene oxide, continuing to uniformly disperse by ultrasonic 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 an apparent mass modifier which is 1% of the mass of the concrete cementing material and is doped on the basis of comparative example 1.
Example 2
A method for preparing a concrete apparent mass modifier attached to an oily release agent, comprising:
(1) Mixing 25 parts of organic silicon monomer with 50 parts of absolute ethyl alcohol to form an organic silicon monomer solution;
(2) Adding 5 parts of nano graphene oxide, continuing to uniformly disperse by ultrasonic 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 organosilicon 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 an apparent mass modifier which is 1% of the mass of the concrete cementing material and is doped on the basis of comparative example 2.
Example 3
A method for preparing a concrete apparent mass 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 an organic silicon monomer solution;
(2) Adding 4 parts of nano graphene oxide, continuing to uniformly disperse by ultrasonic at 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 ethyl trichlorosilane and fluorosilicone monomer in a mass ratio of 1: 1;
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 an apparent mass modifier which is 1% of the mass of the concrete cementing material and is doped on the basis of comparative example 1.
Application examples
The concrete mix ratios used in the above examples and comparative examples are shown in table 1 below:
TABLE 1C30 concrete basic mix ratio
| Cement and its preparation method | Fly ash | Mineral powder | Sand and sand | Stone | Water and its preparation method | Polycarboxylate water reducer |
| 240 | 85 | 55 | 828 | 1012 | 170 | 1％ |
According to JC/T949-2005 release agent for concrete products, and according to JGJ/T23-2011 technical procedure for detecting concrete compressive strength by rebound method, concrete rebound strength is tested, and the obtained results are shown in Table 2:
TABLE 2 Release agent and concrete Properties
The results in the table 2 show that after the modifier is sprayed, the demoulding performance of the concrete mould release agent is obviously improved, the rebound strength of the concrete is improved, the surface brightness is increased, the water absorption is obviously reduced, and the improvement effect is obvious.
Compared with the example 1, the comparative example 1 only adopts the release agent engine oil, has general release performance, low rebound strength, lower surface brightness and high water absorption;
compared with the example 2, the comparative example 2 only adopts silicone oil type oil release agent, has poorer release performance, low rebound strength, lower surface brightness and high water absorption rate;
In comparative example 3, which was compared with example 1 and comparative example 1, a modifier to which no graphene oxide was added was used, and the release properties were general, and the rebound strength, the surface brightness and the water absorption were all between those of example 1 and comparative example 1;
In comparison with example 1 and comparative example 1, the mold release property of the modifier without the addition of the nano paraffin emulsion was generally set between that of example 1 and comparative example 1, and the rebound strength, the surface brightness and the water absorption were all in the range between those of example 1 and comparative example 1.
Claims (5)
1. The concrete apparent mass modifier attached to the oily release agent is characterized in that the concrete apparent mass modifier is obtained by uniformly dispersing organosilicon monomer solution, nano graphene oxide and modified nano paraffin emulsion by ultrasonic;
The organic silicon monomer solution is obtained by mixing organic silicon monomers with ethanol;
the modified nano paraffin emulsion is obtained by uniformly mixing nano paraffin emulsion, nano graphite particles, nano silicon dioxide, disodium edetate and calcium formate and then performing ultrasonic dispersion;
The raw material components are as follows in parts by mass:
2. the concrete apparent mass modifier attached to an oily release agent according to claim 1, wherein the ethanol is absolute ethanol.
3. The modifier for apparent mass of concrete attached to an oily release agent according to claim 1, wherein the organosilicon monomer is selected from any one or more of methylchlorosilane, phenylchlorosilane, methylvinylchlorosilane, ethyltrichlorosilane, propyltrichlorosilane, vinyltrichlorosilane, γ -chloropropyltrichlorosilane and fluorosilicone monomers.
4. A method for preparing a concrete apparent mass modifier attached to an oily release agent as claimed in any one of claims 1 to 3, comprising:
(1) Mixing an organosilicon monomer with ethanol to form an organosilicon monomer solution;
(2) Adding nano graphene oxide into the organic silicon monomer solution obtained in the step (1), continuing to uniformly disperse by ultrasonic at 50-70 ℃ and keeping for 3-5 h;
(3) And (3) adding the solution obtained in the step (2) into modified nano paraffin emulsion, and uniformly dispersing by ultrasonic to obtain the concrete apparent mass modifier.
5. The method for applying the concrete apparent mass modifier attached to the oily release agent, which is characterized in that when the concrete apparent mass modifier is used, the concrete apparent mass modifier is directly sprayed on the surface of the oily release agent by adopting a spraying device, and the mixing amount of the concrete apparent mass modifier is not more than 2% of the mass of a cementing 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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