CN117228983B - Additive for inhibiting flocculant in machine-made sand and preparation method thereof - Google Patents
Additive for inhibiting flocculant in machine-made sand and preparation method thereof Download PDFInfo
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- CN117228983B CN117228983B CN202311260992.7A CN202311260992A CN117228983B CN 117228983 B CN117228983 B CN 117228983B CN 202311260992 A CN202311260992 A CN 202311260992A CN 117228983 B CN117228983 B CN 117228983B
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- 239000004576 sand Substances 0.000 title claims abstract description 38
- 239000000654 additive Substances 0.000 title claims abstract description 28
- 230000000996 additive effect Effects 0.000 title claims abstract description 27
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000004567 concrete Substances 0.000 claims abstract description 27
- 239000002270 dispersing agent Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000007800 oxidant agent Substances 0.000 claims abstract description 22
- 230000001590 oxidative effect Effects 0.000 claims abstract description 22
- 239000008394 flocculating agent Substances 0.000 claims abstract description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229920002261 Corn starch Polymers 0.000 claims description 6
- 239000008120 corn starch Substances 0.000 claims description 6
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 229920001273 Polyhydroxy acid Polymers 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- FOCAUTSVDIKZOP-UHFFFAOYSA-N chloroacetic acid Chemical compound OC(=O)CCl FOCAUTSVDIKZOP-UHFFFAOYSA-N 0.000 claims description 5
- 229940106681 chloroacetic acid Drugs 0.000 claims description 5
- 229920000058 polyacrylate Polymers 0.000 claims description 5
- 239000012286 potassium permanganate Substances 0.000 claims description 5
- UMPKMCDVBZFQOK-UHFFFAOYSA-N potassium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[K+].[Fe+3] UMPKMCDVBZFQOK-UHFFFAOYSA-N 0.000 claims description 5
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 5
- 229960001763 zinc sulfate Drugs 0.000 claims description 5
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 239000004568 cement Substances 0.000 abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229920002401 polyacrylamide Polymers 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004375 Dextrin Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000176 sodium gluconate Substances 0.000 description 1
- 229940005574 sodium gluconate Drugs 0.000 description 1
- 235000012207 sodium gluconate Nutrition 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 150000008130 triterpenoid saponins Chemical class 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
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses an additive for inhibiting flocculating agent in machine-made sand and a preparation method thereof, belonging to the technical field of concrete. The additive comprises the following raw materials in parts by mass: 20-30 parts of dispersing agent, 40-60 parts of deflocculant, 5-10 parts of oxidant and 5-35 parts of water. The invention takes the dispersant, the deflocculant and the oxidant as raw materials, and the mixture is compounded according to a certain proportion, so that the obtained additive not only can promote the viscosity of cement paste to be reduced, but also can improve the workability and cohesiveness of concrete, and does not influence the strength of the concrete.
Description
Technical Field
The invention belongs to the technical field of concrete, and particularly relates to an additive for inhibiting flocculating agents in machine-made sand and a preparation method thereof.
Background
With the acceleration of the urban construction process and the rapid development of the construction industry, the demand for the sand for the construction is increasing, and the adoption of machine-made sand to replace natural sand for preparing concrete becomes a necessary trend of sustainable development of the concrete industry. However, during the production process of the machine-made sand, a large amount of rock powder is generated, and the rock powder contained in the machine-made sand is usually cleaned in a water washing mode at home. In recent years, because polyacrylamide flocculant has good effects of flocculating and precipitating impurities and the like to purify water quality, the polyacrylamide flocculant is widely applied to machine-made sand washing processes in machine-made sand factories. At present, most domestic machine-made sand production processes use anionic polyacrylamide as a flocculant to flocculate and precipitate floating substances and fine particles in the sand, but due to the recycling of cleaning water, some flocculant components remain in the water-washing machine-made sand, and the residual flocculant in the machine-made sand causes the problems of poor workability, high viscosity, low flow velocity, quick loss and the like of the mixed concrete.
At present, aiming at the problem that flocculating agents are contained in water washing machine-made sand, the common means is to increase the mixing amount of additives, but the increase of the mixing amount can cause the increase of the sensitivity of concrete, the difficulty of controlling buildings is increased, and the problems of segregation, bleeding, poor inclusion and the like of the stirred concrete are more easy to occur, and meanwhile, the production cost is increased.
Therefore, the additive capable of effectively inhibiting the influence of the flocculant in the machine-made sand on the concrete is prepared, and has remarkable significance for promoting wider application of the machine-made sand.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an additive for inhibiting flocculant in machine-made sand and a preparation method thereof.
In order to achieve the above purpose, the present invention provides the following technical solutions:
an additive for inhibiting flocculating agent in machine-made sand comprises the following raw materials in parts by mass: 20-30 parts of dispersing agent, 40-60 parts of deflocculant, 5-10 parts of oxidant and 5-35 parts of water. Preferably, it is: 25 parts of dispersing agent, 50 parts of deflocculant, 10 parts of oxidant and 15 parts of water.
Further, the dispersing agent comprises the following components in parts by mass: 500 parts of deionized water, 1500 parts of isopropanol, 250 parts of corn starch, 200 parts of chloroacetic acid and 50 parts of sodium hydroxide.
Further, the preparation method of the dispersing agent comprises the following steps: weighing raw materials according to mass, adding deionized water into a reactor provided with a stirrer, a dripping device and a heating device, heating to 40-50 ℃ (preferably 40 ℃), dripping isopropanol and corn starch, stirring for 20 minutes, dripping chloroacetic acid for 1h, finally adding sodium hydroxide, keeping the temperature at 40-50 ℃ (preferably 40 ℃), continuing to react for 1h after dripping, and cooling to room temperature. The solution ph=7 was adjusted with acetic acid. And after the reaction is finished, washing with methanol for 1h, filtering and drying to obtain the product.
Further, the deflocculant comprises the following components in parts by mass: 400 parts of deionized water, 20 parts of sodium polyphosphate, 15 parts of polyacrylate, 30 parts of polyhydroxy acid diethyl ether, 10 parts of dispersible alumina and 10 parts of zinc sulfate.
Further, the preparation method of the deflocculant comprises the following steps: weighing raw materials according to mass, adding deionized water, sodium polyphosphate, polyacrylate, polyhydroxy acid diethyl ether, dispersible alumina and zinc sulfate into a reactor, uniformly mixing, reacting for 2 hours at 50-55 ℃ (preferably 50 ℃), cooling to room temperature, neutralizing the solution to pH=7, adjusting the concentration, evaporating and concentrating by a rotary evaporator, and concentrating to obtain the deflocculant with the solid content of 40%.
Further, the oxidant comprises the following components in parts by mass: 20 parts of potassium permanganate, 15 parts of potassium ferrate, 15 parts of potassium dichromate and 50 parts of deionized water.
Further, the preparation method of the oxidant comprises the following steps: weighing raw materials according to mass, adding potassium permanganate, potassium ferrate, potassium dichromate and deionized water into a reactor provided with a stirrer, a dripping device and a heating device, stirring for 1h at 55-65 ℃ (preferably 60 ℃), then adjusting pH=7, adjusting concentration, evaporating and concentrating by a rotary evaporator, and concentrating to obtain the oxidant with the solid content of 50%.
The invention also provides a preparation method of the additive for inhibiting the flocculant in the machine-made sand, which comprises the following steps: weighing raw materials according to mass, mixing a dispersing agent, a deflocculant, an oxidant and water, and uniformly stirring to obtain the additive for inhibiting the flocculating agent in the machine-made sand.
The invention also provides application of the additive for inhibiting the flocculant in the machine-made sand in the concrete containing the flocculant.
Compared with the prior art, the invention has the following advantages and technical effects:
the invention takes dispersing agent, deflocculant and oxidant as raw materials, the initial dispersibility of cement is improved by strictly controlling the dosage of the raw materials and compounding the raw materials according to a certain proportion, and meanwhile, flocculant ions are digested and agglomerated and precipitated by utilizing the interaction of the deflocculant and oxidant and polyacrylamide flocculant, thereby promoting the viscosity of cement paste to be reduced, improving the workability and cohesiveness of concrete and not affecting the strength of the concrete.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The "room temperature" as used herein is calculated as 25.+ -. 2 ℃ unless otherwise indicated. The parts are all parts by mass unless otherwise specified.
The raw materials used in the following examples of the present invention are all commercially available.
The following examples serve as further illustrations of the technical solutions of the invention.
Example 1
Raw materials of additive for inhibiting flocculating agent in machine-made sand: 20 parts of dispersing agent, 40 parts of deflocculant, 5 parts of oxidant and 35 parts of water.
1) Preparation of a dispersing agent: 500 parts of deionized water is added into a reactor provided with a stirrer, a dripping device and a heating device, the temperature is raised to 40 ℃, 1500 parts of isopropyl alcohol and 250 parts of corn starch are dripped into the reactor, the mixture is stirred for 20 minutes, 200 parts of chloroacetic acid is dripped into the reactor within 1 hour, and finally 50 parts of 1mol/L sodium hydroxide solution is dripped into the reactor within 30 minutes, the temperature is kept at 40 ℃, the reaction is continued for 1 hour after the dripping is finished, and the mixture is cooled to room temperature. The solution ph=7 was adjusted with acetic acid, then washed with methanol for 1h, filtered and dried to give a dispersant.
2) Preparation of deflocculant: 400 parts of deionized water, 20 parts of sodium polyphosphate, 15 parts of polyacrylate, 30 parts of polyhydroxy acid diethyl ether, 10 parts of dispersible alumina and 10 parts of zinc sulfate are added into a reactor, uniformly mixed, reacted for 2 hours at 50 ℃, cooled to room temperature, and the solution is adjusted to pH=7, and concentrated by a rotary evaporator to obtain the deflocculant with the solid content of 40%.
3) Preparation of an oxidant: 20 parts of potassium permanganate, 15 parts of potassium ferrate, 15 parts of potassium dichromate and 50 parts of deionized water are added into a reactor equipped with a stirrer, a dripping device and a heating device, stirred at 60 ℃ for 1h, then the pH=7 is adjusted, and the mixture is concentrated by a rotary evaporator to obtain an oxidant with the solid content of 50%.
4) Preparation of an additive for inhibiting flocculant in machine-made sand: weighing raw materials according to mass, mixing a dispersing agent, a deflocculant, an oxidant and water, and uniformly stirring to obtain the additive for inhibiting the flocculating agent in the machine-made sand.
Example 2
The difference from example 1 is that the raw materials of the additive for inhibiting flocculant in machine-made sand are: 20 parts of dispersing agent, 50 parts of deflocculant, 10 parts of oxidant and 20 parts of water.
Example 3
The difference from example 1 is that the raw materials of the additive for inhibiting flocculant in machine-made sand are: 25 parts of dispersing agent, 50 parts of deflocculant, 10 parts of oxidant and 15 parts of water.
Example 4
The difference from example 1 is that the raw materials of the additive for inhibiting flocculant in machine-made sand are: 30 parts of dispersing agent, 60 parts of deflocculant, 5 parts of oxidant and 5 parts of water.
Comparative example 1
The difference from example 3 is that the raw material dispersant is replaced with an equivalent amount of sodium polyacrylate dispersant (purchased from the company of the environmental protection technology development of tin-free feng min).
Comparative example 2
The difference was that the raw material deflocculant was replaced with an equivalent amount of deflocculant (purchased from Zhongwei building materials Co., ltd. In Shijia).
Comparative example 3
The difference from example 3 is that the corn starch during the preparation of the dispersant is replaced by an equivalent amount of dextrin.
Comparative example 4
The difference is that the sodium polyphosphate during the deflocculant preparation is removed as in example 3.
Testing the performance of cement paste:
the method is characterized in that the pulp cleaning test is carried out on Emeing P.O42.5 cement under the condition of 0.29 water-cement ratio, and the testing process is according to GB/T8077-2012 "concrete admixture homogeneity test method".
Blank group: no flocculant is added;
flocculant group: adding flocculant accounting for 0.05% of the mass of the cementing material;
examples and comparative examples groups: flocculant accounting for 0.05 percent of the mass of the cementing material and additive which inhibits the flocculant accounting for 0.05 percent of the mass of the cementing material are added.
In all experimental groups, the flocculant is anionic polyacrylamide, the mixing amount of the water reducer is 0.8% of the mass of the cementing material, and other materials are the same. The samples were tested for cement paste thickening effect by means of an NDJ-8S rotary viscometer, as shown in table 1.
Table 1 evaluation of Cement paste Properties of different formulated products
As can be seen from the paste test, the flocculant has a larger influence on the fluidity of the cement paste, the fluidity loss after 1 hour is larger, and the initial viscosity is also increased more. After the additive for inhibiting the flocculant is added, the fluidity of the cement paste is obviously improved, the fluidity loss after 1 hour is smaller, and the viscosity of the paste is lower than that of a blank paste. The example group compared to the comparative example group had a greater initial and 1 hour of paste fluidity and a smaller paste viscosity than the comparative example.
And (3) testing the performance of the concrete:
the performances of the above examples and comparative examples were examined by concrete tests, wherein the cement was Emeisheng P.O42.5 cement, the sand was two-zone sand having a fineness modulus of 2.8, and the stone was crushed stone of 5-25mm continuous gradation. The single concrete is mixed with the following concrete (ton) admixture, the formula of which is shown in table 2: the polycarboxylic acid water reducer, the slump retaining agent, the retarder (sodium gluconate) agent, the air entraining agent (triterpenoid saponin) and water=300:100:20:1:579 (mass ratio), and the mixing amount of the additive is 1% of the mass of the cementing material.
TABLE 2 concrete mix ratio
| Cement/Kg | Sand/Kg | Pebble (5-10 mm)/Kg | Pebble (10-25 mm)/Kg | Water/Kg | additive/Kg |
| 360 | 840 | 416 | 624 | 160 | 3.6 |
The following experimental groups were set on the basis of the above concrete formulation:
blank group: no flocculant is added;
flocculant group: adding flocculant accounting for 0.05% of the mass of the cementing material;
examples and comparative examples groups: flocculant accounting for 0.05 percent of the mass of the cementing material and additive which inhibits the flocculant accounting for 0.05 percent of the mass of the cementing material are added.
In all experimental groups, the flocculant used was polyacrylamide. The results are shown in Table 3 below.
Table 3 concrete test results
From the concrete test results, the flocculant is doped (flocculant group), the concrete is in a worse machine-out state, the expansion degree and slump are smaller, the expansion degree and slump loss after 1 hour are larger, the concrete is more viscous, the flow rate is slow, the coating property is poor, the exposed stone is obvious, and the strength of 7d and 28d is lower than that of a blank group. After the admixture prepared by the invention is doped, the workability of concrete is obviously improved, the slump and the expansion degree are obviously improved, the expansion degree and the slump loss after 1 hour are smaller, the concrete flow speed is high, the wrapping property is good, and the strength of 7d and 28d is higher than that of a blank group. The examples set had better workability, faster flow rate, softer slurry, and higher strength at 7d and 28d than the comparative examples set.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. An additive for inhibiting flocculating agent in machine-made sand is characterized by comprising the following raw materials in parts by mass: 20-30 parts of dispersing agent, 40-60 parts of deflocculant, 5-10 parts of oxidant and 5-35 parts of water;
the dispersing agent comprises the following components in parts by mass: 500 parts of deionized water, 1500 parts of isopropanol, 250 parts of corn starch, 200 parts of chloroacetic acid and 50 parts of sodium hydroxide;
the deflocculant comprises the following components in parts by mass: 400 parts of deionized water, 20 parts of sodium polyphosphate, 15 parts of polyacrylate, 30 parts of polyhydroxy acid diethyl ether, 10 parts of dispersible alumina and 10 parts of zinc sulfate;
the oxidant comprises the following components in parts by mass: 20 parts of potassium permanganate, 15 parts of potassium ferrate, 15 parts of potassium dichromate and 50 parts of deionized water.
2. The additive for inhibiting flocculant in machine-made sand of claim 1, wherein the preparation method of the dispersant comprises the following steps: weighing raw materials according to mass, heating deionized water, adding isopropanol and corn starch, stirring, then dropwise adding chloroacetic acid, then adding sodium hydroxide, cooling to room temperature, adjusting pH to 7, washing, filtering, and drying to obtain the dispersing agent.
3. An admixture for inhibiting flocculant in machine-made sand as claimed in claim 1, wherein said deflocculating agent is prepared by a process comprising the steps of: weighing raw materials according to mass, mixing deionized water, sodium polyphosphate, polyacrylate, polyhydroxy acid diethyl ether, dispersible alumina and zinc sulfate, heating, cooling to room temperature, and regulating pH to 7 to obtain the deflocculant with the solid content of 40%.
4. The additive for inhibiting flocculant in machine-made sand of claim 1, wherein the method for preparing the oxidant comprises the steps of: weighing raw materials according to mass, mixing potassium permanganate, potassium ferrate, potassium dichromate and deionized water, and regulating pH to 7 to obtain the oxidant with 50% of solid content.
5. A method of preparing an admixture for inhibiting flocculant in machine-made sand as claimed in any one of claims 1 to 4, comprising the steps of: weighing raw materials according to mass, mixing a dispersing agent, a deflocculant, an oxidant and water, and uniformly stirring to obtain the additive for inhibiting the flocculating agent in the machine-made sand.
6. Use of an admixture according to any one of claims 1 to 4 for inhibiting flocculant in machine-made sand in flocculant-containing concrete.
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