CN115057653A - Preparation method of activator for improving steel slag powder mixing amount in common concrete - Google Patents
Preparation method of activator for improving steel slag powder mixing amount in common concrete Download PDFInfo
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- CN115057653A CN115057653A CN202210163239.5A CN202210163239A CN115057653A CN 115057653 A CN115057653 A CN 115057653A CN 202210163239 A CN202210163239 A CN 202210163239A CN 115057653 A CN115057653 A CN 115057653A
- Authority
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- concrete
- steel slag
- solution
- slag powder
- activator
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- 239000004567 concrete Substances 0.000 title claims abstract description 62
- 239000002893 slag Substances 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 239000000843 powder Substances 0.000 title claims abstract description 37
- 238000002156 mixing Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000012190 activator Substances 0.000 title claims description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 36
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 22
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 230000003213 activating effect Effects 0.000 claims abstract description 11
- 229920000151 polyglycol Polymers 0.000 claims abstract description 11
- 239000010695 polyglycol Substances 0.000 claims abstract description 11
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001379 sodium hypophosphite Inorganic materials 0.000 claims abstract description 6
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- GWYFCOCPABKNJV-UHFFFAOYSA-M 3-Methylbutanoic acid Natural products CC(C)CC([O-])=O GWYFCOCPABKNJV-UHFFFAOYSA-M 0.000 claims description 2
- 239000012153 distilled water Substances 0.000 claims description 2
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 claims description 2
- 238000005204 segregation Methods 0.000 abstract description 4
- 230000000740 bleeding effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 235000012245 magnesium oxide Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical class [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- -1 pentaerythritol ester Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 238000012795 verification Methods 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of an activating agent for improving the mixing amount of steel slag powder in common concrete, which is characterized in that ethylene glycol monovinyl polyglycol ether, pentaerythritol isoate, sodium hypophosphite, calcium nitrate, sodium silicate and the like are used for preparing the activating agent, the activating agent is added in the production of the concrete, the problems of low mixing amount, bleeding, segregation and only use in non-structural concrete of the steel slag powder in the application of the concrete are solved, the concrete with high mixing amount of the steel slag powder is ensured to meet the construction performance and the strength and meet the quality requirements, and the concrete can be applied to common building structures.
Description
Technical Field
The invention relates to a preparation method of an activating agent for improving the mixing amount of steel slag powder in common concrete, belonging to the technical field of preparation of building materials.
Background
The steel slag is a necessary byproduct in the steel making process, the yield of the steel slag is 15% -20% of the yield of crude steel, the steel slag occupies a large proportion in industrial waste slag, and the main mineral phases are solid melts formed by tricalcium silicate, dicalcium silicate, forsterite, spodumene, calcium aluminoferrite and oxides of silicon, magnesium, iron, manganese and phosphorus. Sometimes, the slag lumps are broken due to the volume expansion of the slag lumps caused by the conversion of the contained free calcium and magnesium oxides into hydroxides by reaction with water or moisture, but the effective application is not delayed due to the large fluctuation of the composition. At present, the steel slag is mainly used for crushing and grinding the steel slag to prepare steel slag powder, and the steel slag powder is used as a cement mixing material on one hand, so that clinker can be saved in cement production; on the other hand, the mineral admixture is used in concrete to reduce the cost.
But is difficult to be applied in large quantity due to technical limitation, has large quantity and low price, is concerned by more and more researchers, is used as a mixed material in the grinding process of cement at present to reduce the cost, the mixing amount is 3-5 percent in the production process, and is used as a concrete admixture directly in the concrete on the other hand, the using amount is less than 50 kg/square, the using amount is less, and the problem of large-quantity stockpiling of steel slag caused by industrial solid waste utilization is difficult to be fundamentally solved.
At present, the application problem of the steel slag powder in concrete is mainly solved by adopting a high-performance polycarboxylate superplasticizer which is compounded with various functional additives to solve the problems of low activity and high water demand of the steel slag. The existing scheme reduces the water-cement ratio of concrete from the angle of a polycarboxylic acid water reducing agent and an exciting agent and improves the strength, so that the problems of low activity and high water demand of the steel slag powder are solved; the problems of poor wrapping property of the steel slag powder are solved to a certain extent by raw materials such as a compound air entraining agent and the like, and the problems are only solved under the condition of less steel slag powder doping amount, but cannot be solved in the aspect of high-doping-amount steel slag powder application.
In addition, under the condition of low consumption of the steel slag, the steel slag powder also needs to independently occupy one storage tank, and the concrete prepared by the steel slag powder can only be used in non-structural concrete such as a road surface and the like, can not be used for common concrete as structural concrete, and can not fundamentally solve the problem of the application of the steel slag powder in the concrete.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a preparation method of an activator for improving the mixing amount of steel slag powder in common concrete, prepares the activator by utilizing ethylene glycol monovinyl polyglycol ether, pentaerythritol isoate, sodium hypophosphite, calcium nitrate, sodium silicate and the like, and adds the activator in the production of the concrete to solve the problems of low mixing amount, bleeding, segregation and only use in non-structural concrete of the steel slag powder in the application of the concrete.
A preparation method of an activating agent for improving the mixing amount of steel slag powder in common concrete comprises the following steps:
1) adding ethylene glycol monovinyl polyglycol ether into distilled water, stirring and dissolving to prepare an ethylene glycol monovinyl polyglycol ether solution;
2) adding pentaerythritol isovalerate and sodium hypophosphite into the ethylene glycol monovinyl polyethylene glycol ether solution prepared in the step 1) to prepare a mixed solution, controlling the temperature to be 20 ℃, reacting for 30min, and adjusting the pH to be 7-8 to obtain a raw material a;
3) respectively and simultaneously dripping a calcium nitrate aqueous solution, a sodium silicate aqueous solution and the raw material a prepared in the step 2) in a nitric acid solution in a three-dripping mode, finishing dripping within 40-50min, controlling the pH to be 9-11, and stirring for 24-26h to obtain the activator.
Further, the concentration of the ethylene glycol monovinyl polyglycol ether solution in the step 1) is 45-50%.
Further, the molar ratio of the ethylene glycol monovinyl polyglycol ether, the isomeric acid pentaerythritol ester and the sodium hypophosphite in the mixed solution in the step 2) is 1: (3-4): (0.01-0.05).
Further, the concentration of the nitric acid solution in the step 3) is 4-5%.
Further, the concentration of the calcium nitrate aqueous solution in the step 3) is 35 to 40%.
Further, the concentration of the sodium silicate aqueous solution in the step 3) is 18-20%.
Further, the nitric acid solution, the calcium nitrate aqueous solution, the sodium silicate aqueous solution and the raw material a in the step 3) are mixed according to the volume ratio of (18-20): (1.8-2): (2.7-3): (4.6-5).
The application also protects an activating agent which is prepared by the preparation method and used for improving the mixing amount of the steel slag powder in the common concrete.
Furthermore, the application of the activator in improving the mixing amount of the steel slag powder in the concrete is characterized in that 2-3% of the activator is added in the production process of the concrete.
The steel slag activator forms C-S-H gel in the synthesis process, forms firm crystal nucleus less than 100nm in the concrete gap, improves the strength of the concrete, and simultaneously, the steel slag powder is difficult to contact CO in the air in the dense concrete 2 And water, which hinders the expansion of the steel slag powder; in addition, the hydrophobic effect of the polyethylene glycol ether group improves the flowing property of the steel slag powder in concrete.
Has the advantages that:
the invention aims at solving the problems that the steel slag powder is difficult to be applied to concrete in a large quantity, prepares a novel steel slag activating agent, solves the problems that the steel slag powder is small in dosage, weeping and segregation and only used in non-structural concrete in the application of the concrete, and particularly adds the activating agent in the production process of the concrete, wherein the dosage is 2-3 percent of the mass of a cementing material, so that the application of the steel slag powder in the concrete can reach more than 100 kg/square, the concrete is ensured not to weep and segregation and good in peaceability, the construction performance and the strength meet the quality requirements, and the concrete can be applied to common building structures.
Detailed Description
In order to make the technical solutions in the present application better understood, the present invention is further described below with reference to examples, which are only a part of examples of the present application, but not all examples, and the present invention is not limited by the following examples.
Example 1
The concrete working performance refers to GB/T50080-2016 standard of common concrete mixture performance test method, the concrete strength and expansion coefficient test refers to GB/T50081-2019 standard of concrete physical and mechanical property test method, and the concrete raw material steel slag powder technical index refers to GB/T20491-2017 steel slag powder for cement and concrete
The effect of the common concrete according to C30 is compared as follows:
through the analysis of the experimental data, the (1) common polycarboxylic acid water reducing agent is adopted, the highest doping amount of the steel slag powder in the concrete can reach 40kg/m3, and after the doping amount is exceeded, the strength, the performance and the expansion coefficient of the concrete can not reach the standard concrete quality index, so that the steel slag powder is difficult to apply to the structural concrete after the doping amount is exceeded;
after the steel slag activating agent is adopted, the using amount of the steel slag powder can reach 100kg/m 3 And 120kg/m 3 In the process, the strength, the performance and the expansion coefficient of the concrete can meet the requirements of standard concrete, so that the concrete can be used in common building structures by adopting the steel slag activating agent under the condition of high content of steel slag powder.
Example 2
The existing steel slag improving mode and the activator of the patent are compared according to the test of C30 common concrete as follows:
the existing mode of increasing the using amount of the steel slag powder is simultaneously adjusted in three aspects, so that the using amount of the water reducing agent is increased, the performance is improved, the using amount of cement is increased, the using amount of fly ash is reduced, the strength is improved, the sand rate is reduced, the volume stability is kept, and the expansion coefficient is improved; this patent adopts the single aspect of activator can directly solve to can be superior to current adjustment mode in each item index, avoid the uncertain factor that the whole ratio adjustment of concrete brought.
Example 3
Case 3 verification of Replacing Water reducing Agents
As can be seen from tests 1 and 3, the core geneAfter the material a equivalently replaces the water reducing agent, the performance of the concrete is kept unchanged, which shows that the core material a can replace the water reducing agent, and the hydrophobic functional group of the polyglycol ether plays a role of the water reducing agent; the activator introduces Ca on the basis of the core raw material a 2+ ,SiO 3 2- The plasma improves the strength of concrete, reduces the expansion coefficient of the concrete, increases C-S-H gel at the same time, and increases the performance (slump and expansion) of the concrete.
Claims (9)
1. A preparation method of an activating agent for improving the mixing amount of steel slag powder in common concrete is characterized by comprising the following steps:
1) adding ethylene glycol monovinyl polyglycol ether into distilled water, stirring and dissolving to prepare an ethylene glycol monovinyl polyglycol ether solution;
2) adding pentaerythritol isovalerate and sodium hypophosphite into the ethylene glycol monovinyl polyethylene glycol ether solution prepared in the step 1) to prepare a mixed solution, controlling the temperature to be 20 ℃, reacting for 30min, and adjusting the pH to be 7-8 to obtain a raw material a;
3) respectively and simultaneously dripping a calcium nitrate aqueous solution, a sodium silicate aqueous solution and the raw material a prepared in the step 2) in a nitric acid solution in a three-dripping mode, finishing dripping within 40-50min, controlling the pH to be 9-11, and stirring for 24-26h to obtain the activator.
2. The method according to claim 1, wherein the concentration of the ethylene glycol monovinyl polyglycol ether solution in step 1) is 45 to 50%.
3. The method according to claim 1, wherein the molar ratio of the ethylene glycol monovinyl polyglycol ether, the pentaerythritol isoate and the sodium hypophosphite in the mixed solution in step 2) is 1: (3-4): (0.01-0.05).
4. The method according to claim 1, wherein the concentration of the nitric acid solution in the step 3) is 4 to 5%.
5. The method of claim 1, wherein the concentration of the aqueous calcium nitrate solution in the step 3) is 35 to 40%.
6. The method of claim 1, wherein the concentration of the aqueous sodium silicate solution in step 3) is 18 to 20%.
7. The method according to claim 1, wherein the nitric acid solution, the calcium nitrate aqueous solution, the sodium silicate aqueous solution and the raw material a in step 3) are mixed in a volume ratio of (18-20): (1.8-2): (2.7-3): (4.6-5).
8. An activator for increasing the amount of slag powder incorporated in general concrete, prepared by the method according to claim 1.
9. The use of the activator of claim 8 to increase the loading of steel slag powder in concrete, wherein 2-3% of the activator is added during the concrete production process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210163239.5A CN115057653A (en) | 2022-02-22 | 2022-02-22 | Preparation method of activator for improving steel slag powder mixing amount in common concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210163239.5A CN115057653A (en) | 2022-02-22 | 2022-02-22 | Preparation method of activator for improving steel slag powder mixing amount in common concrete |
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| Publication Number | Publication Date |
|---|---|
| CN115057653A true CN115057653A (en) | 2022-09-16 |
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| CN202210163239.5A Pending CN115057653A (en) | 2022-02-22 | 2022-02-22 | Preparation method of activator for improving steel slag powder mixing amount in common concrete |
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| Country | Link |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979828A (en) * | 2014-05-30 | 2014-08-13 | 山东众森科技股份有限公司 | Steel-slag-based concrete admixture functional regulator and preparation method thereof |
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| WO2018088684A1 (en) * | 2016-11-14 | 2018-05-17 | (주)포스코건설 | Concrete composition in which substitution rate of silica-based slag for concrete is increased using liquid activating agent |
| CN109336444A (en) * | 2018-12-12 | 2019-02-15 | 盐城市国泰混凝土有限公司 | Slag processing agent mixes steel slag ready-mixed concrete and preparation method thereof |
| CN112723785A (en) * | 2020-12-25 | 2021-04-30 | 山东众森科技股份有限公司 | Special function regulator for steel slag-based cementing material and preparation method thereof |
| CN112919846A (en) * | 2021-03-05 | 2021-06-08 | 江西理工大学 | Method for preparing concrete admixture from tailings |
-
2022
- 2022-02-22 CN CN202210163239.5A patent/CN115057653A/en active Pending
Patent Citations (6)
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| Title |
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