CN116969726A - Composition for inhibiting steel slag expansion and application thereof - Google Patents
Composition for inhibiting steel slag expansion and application thereof Download PDFInfo
- Publication number
- CN116969726A CN116969726A CN202310950512.3A CN202310950512A CN116969726A CN 116969726 A CN116969726 A CN 116969726A CN 202310950512 A CN202310950512 A CN 202310950512A CN 116969726 A CN116969726 A CN 116969726A
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- steel slag
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- emulsion
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 72
- 239000002893 slag Substances 0.000 title claims abstract description 72
- 239000010959 steel Substances 0.000 title claims abstract description 72
- 239000000203 mixture Substances 0.000 title claims abstract description 40
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 22
- 239000000839 emulsion Substances 0.000 claims abstract description 56
- -1 acrylic ester Chemical class 0.000 claims abstract description 18
- 239000003469 silicate cement Substances 0.000 claims abstract description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims abstract description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 7
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims abstract description 7
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000007720 emulsion polymerization reaction Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000011398 Portland cement Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 description 20
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000003999 initiator Substances 0.000 description 9
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000003995 emulsifying agent Substances 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 description 5
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 239000011414 polymer cement Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000011344 liquid material Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- TUSDEZXZIZRFGC-UHFFFAOYSA-N 1-O-galloyl-3,6-(R)-HHDP-beta-D-glucose Natural products OC1C(O2)COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC1C(O)C2OC(=O)C1=CC(O)=C(O)C(O)=C1 TUSDEZXZIZRFGC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000001263 FEMA 3042 Substances 0.000 description 1
- LRBQNJMCXXYXIU-PPKXGCFTSA-N Penta-digallate-beta-D-glucose Natural products OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-PPKXGCFTSA-N 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- CEGOLXSVJUTHNZ-UHFFFAOYSA-K aluminium tristearate Chemical compound [Al+3].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CEGOLXSVJUTHNZ-UHFFFAOYSA-K 0.000 description 1
- 229940063655 aluminum stearate Drugs 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- LRBQNJMCXXYXIU-NRMVVENXSA-N tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 1
- 229940033123 tannic acid Drugs 0.000 description 1
- 235000015523 tannic acid Nutrition 0.000 description 1
- 229920002258 tannic acid Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 150000003722 vitamin derivatives Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a composition for inhibiting steel slag expansion. The composition comprises 1 part by weight of acrylic ester emulsion and 1.2 to 1.8 parts by weight of silicate cement; the acrylic ester emulsion is prepared by emulsion polymerization of raw materials comprising 400-800 parts by weight of butyl acrylate, 150-250 parts by weight of methyl methacrylate, 5-20 parts by weight of acrylic acid and 5-20 parts by weight of hydroxyethyl acrylate. The composition has good effect on inhibiting the expansion of steel slag.
Description
Technical Field
The invention relates to a composition for inhibiting steel slag expansion and application thereof.
Background
At present, the cost of ore aggregate in road building materials is gradually increased. Steel slag is a by-product of the steelmaking process. If the steel slag can be applied to road engineering, the method not only accords with the sustainable development strategy of the steel industry, but also solves the problem of shortage of natural ore resources. However, the volume of the steel slag can be continuously expanded in the using process, and the steel slag has hidden danger in use as a road building material.
CN104829207a discloses a polymer cement waterproof paint. The coating comprises a liquid component and a powder component. The liquid material comprises the following components: polymer emulsion, triethanolamine, dispersant, preservative, defoamer and water. The powder material comprises special cement, superfine slag, superfine steel slag, high collar clay, defoamer, water-soluble vitamin, powder acrylamide, powder bisacrylamide, instant sodium silicate, aluminum stearate and calcium carbonate. The polymer cement waterproof paint has poor effect on inhibiting steel slag expansion.
CN116004073a discloses a polymer cement waterproof paint. The coating comprises liquid material and powder material. The liquid material comprises 100 parts by weight of modified acrylate emulsion. The powder comprises 35-60 parts of silicate cement, 10-25 parts of filler and 2-15 parts of tannic acid by weight. The modified acrylic emulsion is prepared by reacting methyl acrylate, butyl acrylate and epoxy resin containing alkenyl according to the mass ratio of 10 (20-30) to 5-15. The polymer cement waterproof paint has poor effect on inhibiting steel slag expansion.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a steel slag expansion-inhibiting composition having a good effect of inhibiting steel slag expansion.
It is another object of the present invention to provide the use of the above composition for inhibiting the expansion of steel slag.
The above object is achieved by the following technical scheme.
In one aspect, the invention provides a composition for inhibiting steel slag expansion comprising 1 part by weight of an acrylic emulsion and 1.2 to 1.8 parts by weight of portland cement;
wherein the acrylic ester emulsion is prepared by emulsion polymerization of raw materials comprising 400-800 parts by weight of butyl acrylate, 150-250 parts by weight of methyl methacrylate, 5-20 parts by weight of acrylic acid and 5-20 parts by weight of hydroxyethyl acrylate.
Preferably, the 28-day compressive strength of the Portland cement is more than or equal to 32.5MPa, and the Portland cement is early-strength Portland cement.
Preferably, the portland cement is used in the form of a powder according to the composition of the invention, the portland cement being numbered PO32.5R.
The composition according to the invention preferably comprises 1 part by weight of the acrylate emulsion and 1.3 to 1.6 parts by weight of the Portland cement.
The composition according to the invention preferably consists of an acrylate emulsion and portland cement.
In another aspect, the present invention provides the use of the above composition for inhibiting the expansion of steel slag.
The use according to the invention preferably comprises the steps of: (1) Mixing a composition comprising an acrylate emulsion and portland cement to obtain a material to be coated; and (2) coating the material to be coated on the surface of the steel slag.
According to the use of the present invention, the steel slag preferably has a particle size ranging from 4 to 20mm.
According to the use of the invention, preferably, in the step (1), silicate cement is added into acrylic ester emulsion, and then stirred and mixed until the acrylic ester emulsion wraps the silicate cement, so as to obtain a material to be coated;
in the step (2), the steel slag is soaked in the material to be coated, and the material to be coated is stirred in the process of soaking the steel slag in the material to be coated, so that the material to be coated wraps the steel slag, and the treated steel slag is obtained; and drying the treated steel slag.
According to the use of the present invention, preferably, the drying means is air drying, and the drying time is 3 to 9 hours.
The composition provided by the invention has a good effect on inhibiting the expansion of steel slag, and has a small influence on the mechanical properties of the steel slag.
Detailed Description
The present invention will be further described with reference to specific examples, but the scope of the present invention is not limited thereto.
< composition for inhibiting Steel slag expansion >
The steel slag expansion inhibiting composition of the present invention comprises 1 part by weight of an acrylic emulsion and 1.2 to 1.8 parts by weight of Portland cement. In certain embodiments, the composition consists of an acrylate emulsion and portland cement.
The acrylic ester emulsion is prepared by emulsion polymerization of raw materials including butyl acrylate, methyl methacrylate, acrylic acid and hydroxyethyl acrylate. Preferably, the reactive monomers involved in the polymerization reaction consist of butyl acrylate, methyl methacrylate, acrylic acid and hydroxyethyl acrylate.
The pH of the acrylic ester emulsion is 7-10; preferably, the pH is 7 to 8.
The dosage of butyl acrylate is 400 to 800 parts by weight; preferably 500 to 700 parts by weight; more preferably 550 to 650 parts by weight.
The dosage of the methyl methacrylate is 150 to 250 parts by weight; preferably 180 to 220 parts by weight; more preferably 195 to 210 parts by weight.
The dosage of the acrylic acid is 5 to 20 weight parts; preferably 8 to 13 parts by weight; more preferably 9 to 11 parts by weight.
The dosage of the hydroxyethyl acrylate is 5 to 20 weight parts; preferably 8 to 13 parts by weight; more preferably 9 to 11 parts by weight.
The initiator used in the emulsion polymerization is ammonium persulfate. The initiator may be used in an amount of 1 to 10 parts by weight; preferably 2 to 8 parts by weight; more preferably 3 to 5 parts by weight. This helps to form an acrylate emulsion of the appropriate molecular weight.
The emulsifier used in the emulsion polymerization reaction is a mixture of sodium dodecyl sulfate, peregal O-15 and OP-10.
The dosage of the sodium dodecyl sulfate can be 1 to 10 weight parts; preferably 3 to 8 parts by weight; more preferably 5 to 6 parts by weight.
The dosage of peregal O-15 may be 5-20 parts by weight; preferably 8 to 13 parts by weight; more preferably 10 to 11 parts by weight.
The amount of OP-10 can be 5 to 20 parts by weight; preferably 8 to 13 parts by weight; more preferably 10 to 11 parts by weight.
The polypropylene lactic acid emulsion obtained by the emulsifier is applied to the composition provided by the invention, and can play a better role in inhibiting the expansion of steel slag.
The polyacrylate emulsion of the invention can be prepared by the following method: the reaction monomer, emulsifier, water and sodium bicarbonate are formed into an emulsion to be polymerized. 15 to 35wt%, preferably 20 to 30wt%, of the emulsion to be polymerized is taken as a first emulsion, and the rest of the emulsion to be polymerized is taken as a second emulsion. Adding a first part of initiator into a first emulsion with the temperature of 50-70 ℃, preferably 55-65 ℃, and increasing the temperature of a reaction system along with the progress of the reaction; and dropwise adding a mixed solution formed by the second emulsion and the second part of initiator into the reaction system when the temperature of the reaction system is between 85 and 98 ℃, preferably between 90 and 95 ℃, and controlling the temperature of the reaction system to be between 70 and 90 ℃, preferably between 75 and 85 ℃. After the completion of the dropwise addition of the mixture, the temperature of the reaction system is raised to 80-100 ℃, preferably 85-95 ℃, and then a third part of initiator is added into the reaction system to obtain a reaction product.
In certain embodiments, the reaction product may be cooled, filtered to obtain a polymer emulsion; and then adding a pH regulator into the polymer emulsion to obtain the acrylic ester emulsion.
The water may be used in an amount of 400 to 800 parts by weight; preferably 500 to 700 parts by weight; more preferably 550 to 650 parts by weight.
The dosage of the sodium bicarbonate can be 30 to 70 weight parts; preferably 40 to 60 parts by weight; more preferably 50 to 55 parts by weight.
The dosage of the first part of initiator is 1 to 3 parts by weight; preferably 1.5 to 2.5 parts by weight; more preferably 2 to 2.3 parts by weight.
The dosage of the second part of initiator is 0.2 to 1.5 weight parts; preferably 0.5 to 1 part by weight; more preferably 0.7 to 0.8 parts by weight.
The dosage of the initiator in the third part is 0.5 to 2 parts by weight; preferably 1 to 1.8 parts by weight; more preferably 1.2 to 1.5 parts by weight.
The time for adding the mixed liquid into the reaction system is 3-6 hours; preferably 4 to 5 hours.
Adding a third part of initiator into the reaction system, and then continuing the reaction for 30-60 min; preferably 40 to 50 minutes.
The pH adjuster may be sodium bicarbonate.
Such polyacrylate emulsion can enhance the effect of the composition in inhibiting the expansion of steel slag.
1.2 to 1.8 parts by weight of Portland cement; preferably 1.3 to 1.6 parts by weight; more preferably 1.4 to 1.5 parts by weight. Therefore, the effect of the composition on inhibiting the expansion of steel slag can be improved, the consumption of the composition can be reduced, and the cost can be saved.
The portland cement may be a portland cement powder. The portland cement may be an early strength portland cement. The 28-day compressive strength of the Portland cement is more than or equal to 28MPa; preferably, the 28-day compressive strength is more than or equal to 32.5MPa. According to one embodiment of the invention, the Portland cement is model PO32.5R.
< use of composition >
The composition of the invention can effectively inhibit the expansion of steel slag. Accordingly, the present invention provides the use of the above composition for inhibiting the expansion of steel slag. The composition is specifically described in the foregoing, and is not described in detail herein.
Specifically, the method comprises the following steps: (1) Mixing a composition comprising an acrylate emulsion and portland cement to obtain a material to be coated; and (2) coating the material to be coated on the surface of the steel slag.
According to one embodiment of the invention, portland cement is added to the acrylate emulsion and then mixed with stirring until the acrylate emulsion encapsulates the Portland cement powder to obtain the material to be coated.
The grain size of the steel slag can be 4-20 mm. In certain embodiments, the steel slag has a particle size in the range of 4.75 to 9.5mm. In other embodiments, the steel slag has a particle size in the range of 9.5 to 13.2mm. In still other embodiments, the steel slag has a particle size in the range of 13.2 to 16.0mm.
The manner of coating may be selected from spray or dip. Preferably, the steel slag is immersed, which contributes to the effect of suppressing the expansion of the steel slag.
According to one embodiment of the invention, steel slag is soaked in a material to be coated, and the material to be coated is stirred in the process of soaking the steel slag in the material to be coated, so that the material to be coated wraps the steel slag, and the treated steel slag is obtained; and drying the treated steel slag to obtain the modified steel slag. The drying mode can be air drying. The drying time can be 3-9 h; preferably 4 to 7 hours; more preferably 5 to 6 hours. This helps to reduce the expansion rate of the steel slag.
The test method is described as follows:
expansion ratio: the test was carried out according to the method specified in GB/T24175-2009 Steel slag stability test method.
The following raw materials are introduced:
the model of the silicate cement powder is PO32.5R.
Preparation example 1
10g of peregal O-15, 5g of sodium dodecyl sulfate, 10gOP-10 and 600g of deionized water were dispersed for 5min by a disperser to obtain an emulsifier solution. Adding 600g of butyl acrylate and 205g of methyl methacrylate into the emulsifier solution while stirring the emulsifier solution, and emulsifying and dispersing for 10min; then 10g of acrylic acid and 10g of hydroxyethyl acrylate are added, and after stirring for 5min, 52g of sodium bicarbonate is added and stirred uniformly, the emulsion to be polymerized is obtained. 25% by weight of the emulsion to be polymerized was taken as the first emulsion and the remaining emulsion to be polymerized was taken as the second emulsion. The second emulsion and 0.75g of ammonium persulfate were formed into a mixed solution.
2.25g of ammonium persulfate is added into the first emulsion with the temperature of 60 ℃, and the temperature of a reaction system rises as the reaction proceeds; when the temperature of the reaction system reached 93 ℃, the mixed solution was added dropwise to the reaction system, and the temperature of the reaction system was controlled to 80.+ -. 1 ℃. The time taken for the mixed liquid to be added dropwise to the reaction system was 4 hours. After the completion of the dropwise addition of the mixture, the temperature of the reaction system is raised to 90 ℃, and then 1.2g of ammonium persulfate is added into the reaction system for continuous reaction for 45min, so as to obtain a reaction product. And cooling the reaction product, filtering and discharging by using a screen mesh to obtain the polymer emulsion. Adding sodium bicarbonate into the polymer emulsion to adjust the pH value to 7-8, and shaking uniformly to obtain the acrylic ester emulsion.
Examples 1 to 3 and comparative examples 1 to 2
The composition for inhibiting steel slag expansion consists of silicate cement powder and 1 part by weight of acrylic ester emulsion. The types of the acrylic emulsion and the amounts of the portland cement powder used are shown in table 1.
TABLE 1
| Sequence number | Types of acrylate emulsions | Portland cement powder amount (parts by weight) |
| Example 1 | Preparation example 1 | 1.2 parts by weight |
| Example 2 | Preparation example 1 | 1.4 parts by weight |
| Example 3 | Preparation example 1 | 1.6 parts by weight |
| Comparative example 1 | Preparation example 1 | 1 part by weight |
Examples 4 to 12 and comparative examples 3 to 5
Placing 1 part by weight of acrylic ester emulsion into a container, and then adding silicate cement powder into the container; and (3) stirring and mixing the acrylic ester emulsion and the silicate cement powder in the container until the acrylic ester emulsion wraps the silicate cement powder, so as to obtain the material to be coated.
The steel slag is soaked in the material to be coated, and the material to be coated is stirred in the process of soaking the steel slag in the material to be coated, so that the material to be coated wraps the steel slag, and the treated steel slag is obtained.
And paving the treated steel slag at a ventilation position, and air-drying for 6 hours to obtain the modified steel slag.
Specific parameters and expansion rates of the modified steel slag are shown in table 2.
TABLE 2
Comparative example 9
Comparative example 9 is unmodified steel slag having a particle size in the range of 4.75 to 9.5mm. The expansion rate of the steel slag is 2.27%.
Comparative example 10
Comparative example 10 is unmodified steel slag having a particle size in the range of 9.5 to 13.2mm. The expansion rate of the steel slag is 2.12%.
Comparative example 11
Comparative example 11 is unmodified steel slag having a particle size in the range of 13.2 to 16.0mm. The expansion rate of the steel slag is 1.89%.
The present invention is not limited to the above-described embodiments, and any modifications, improvements, substitutions, and the like, which may occur to those skilled in the art, fall within the scope of the present invention without departing from the spirit of the invention.
Claims (10)
1. A composition for inhibiting steel slag expansion, which is characterized by comprising 1 part by weight of acrylic ester emulsion and 1.2-1.8 parts by weight of silicate cement;
wherein the acrylic ester emulsion is prepared by emulsion polymerization of raw materials comprising 400-800 parts by weight of butyl acrylate, 150-250 parts by weight of methyl methacrylate, 5-20 parts by weight of acrylic acid and 5-20 parts by weight of hydroxyethyl acrylate.
2. The composition of claim 1, wherein the Portland cement has a 28-day compressive strength of at least 32.5MPa, and the Portland cement is an early strength Portland cement.
3. The composition of claim 1, wherein the portland cement is used in the form of a powder, and the portland cement is numbered PO32.5R.
4. The composition of claim 1, wherein the composition comprises 1 part by weight of the acrylate emulsion and 1.3 to 1.6 parts by weight of the Portland cement.
5. The composition of claim 1, wherein the composition consists of an acrylate emulsion and portland cement.
6. Use of the composition according to any one of claims 1 to 5 for inhibiting the expansion of steel slag.
7. Use according to claim 6, characterized in that it comprises the following steps:
(1) Mixing a composition comprising an acrylate emulsion and portland cement to obtain a material to be coated;
(2) And coating the material to be coated on the surface of the steel slag.
8. The use according to claim 7, characterized in that the grain size of the steel slag ranges from 4 to 20mm.
9. Use according to claim 7, characterized in that:
in the step (1), silicate cement is added into acrylic ester emulsion, and then stirred and mixed until the acrylic ester emulsion wraps the silicate cement, so as to obtain a material to be coated;
in the step (2), the steel slag is soaked in the material to be coated, and the material to be coated is stirred in the process of soaking the steel slag in the material to be coated, so that the material to be coated wraps the steel slag, and the treated steel slag is obtained; and drying the treated steel slag.
10. Use according to claim 9, characterized in that the drying is air-drying for a period of 3-9 hours.
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