CN104829200A - Alkali-activated fly-ash filling material and preparation method thereof - Google Patents
Alkali-activated fly-ash filling material and preparation method thereof Download PDFInfo
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- CN104829200A CN104829200A CN201510181543.2A CN201510181543A CN104829200A CN 104829200 A CN104829200 A CN 104829200A CN 201510181543 A CN201510181543 A CN 201510181543A CN 104829200 A CN104829200 A CN 104829200A
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- 239000000463 material Substances 0.000 title claims abstract description 43
- 239000010881 fly ash Substances 0.000 title claims abstract description 11
- 238000011049 filling Methods 0.000 title abstract description 9
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000003513 alkali Substances 0.000 title abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 10
- 150000002500 ions Chemical class 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003245 coal Substances 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052802 copper Inorganic materials 0.000 claims abstract description 3
- 239000010949 copper Substances 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 239000011572 manganese Substances 0.000 claims abstract description 3
- 239000011574 phosphorus Substances 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 238000005056 compaction Methods 0.000 claims description 20
- 239000007858 starting material Substances 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 239000012190 activator Substances 0.000 claims description 5
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims description 5
- 239000002956 ash Substances 0.000 claims description 4
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 239000004071 soot Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical group [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 229910004298 SiO 2 Inorganic materials 0.000 claims 1
- 239000011324 bead Substances 0.000 claims 1
- 239000005388 borosilicate glass Substances 0.000 claims 1
- 239000001110 calcium chloride Substances 0.000 claims 1
- 229910001628 calcium chloride Inorganic materials 0.000 claims 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims 1
- 239000008116 calcium stearate Substances 0.000 claims 1
- 235000013539 calcium stearate Nutrition 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 229910000029 sodium carbonate Inorganic materials 0.000 claims 1
- 235000010265 sodium sulphite Nutrition 0.000 claims 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 claims 1
- ZNRSXPDDVNZGEN-UHFFFAOYSA-K trisodium;chloride;sulfate Chemical compound [Na+].[Na+].[Na+].[Cl-].[O-]S([O-])(=O)=O ZNRSXPDDVNZGEN-UHFFFAOYSA-K 0.000 claims 1
- 239000002910 solid waste Substances 0.000 abstract description 8
- 239000004568 cement Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 abstract 2
- 238000005345 coagulation Methods 0.000 abstract 2
- 239000004111 Potassium silicate Substances 0.000 abstract 1
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 abstract 1
- 229910052913 potassium silicate Inorganic materials 0.000 abstract 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000010430 carbonatite Substances 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- -1 aluminium metallurgy Substances 0.000 description 1
- 238000009866 aluminium metallurgy Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The present invention discloses an alkali-activated fly-ash filling material and a preparation method thereof. The filling material comprises a cementing material, fine aggregates, an alkali excitant, a heavy-metal ion curing agent, a coagulation accelerator and water. The mass proportion of the cementing material, the fine aggregates, the alkali excitant, the heavy-metal ion curing agent, the coagulation accelerator and the water is 20-40:20-40:10-25:0.1-5:0.01-0.5:10-25 correspondingly. The cementing material comprises a mixture of fly ashes and grounded furnace slags. The fine aggregates comprise one or the mixture of a plurality of components selected from steel slags, manganese slags, phosphorus slags, copper slags, lead-zinc slags, red mud, coal gangues, power plant coal slags, siliceous mine tailings, aluminum mine tailings, and sulphureous mine tailings. The alkali excitant comprises the mixture of sodium silicate/potassium silicate and NaOH/KOH. According to the technical scheme of the invention, the cement is not adopted as the cementing material any more, and industrial solid wastes including various mine tailings are fully utilized. Therefore, the purpose of changing waste into valuables is realized. The pollution of solid wastes is reduced and the ecological environment is improved.
Description
Technical field:
The present invention relates to a kind of compaction material and preparation method thereof.
Technical background:
In recent years, China is in the stage of highly energy-consuming, high pollution always, and country, in order to energy-saving and emission-reduction, reduces and pollutes, propose a series of policy.While the industries such as electric power, iron and steel, aluminium metallurgy, coal, nonferrous metals ore exploitation produce surplus, create a large amount of solid waste, and these solid waste, as slag, manganese slag, phosphorus slag, copper ashes, plumbous cadmia, red mud, coal gangue, power plant soot slag, siliceous CHARACTERISTICS OF TAILINGS SAND, your paster CHARACTERISTICS OF TAILINGS SAND, aluminium matter CHARACTERISTICS OF TAILINGS SAND or sulphur matter CHARACTERISTICS OF TAILINGS SAND etc., urgently large utilization again, the comprehensive regulation, reduces environmental pollution.
At present, both at home and abroad can the field of large utilization for these solid wastes, concentrate on the building material industry such as cement, concrete on the one hand, concentrate on filling, the exploitation of underground on the other hand.Compaction material is also called controlled low-intensity material in North America, and use comparatively universal in North America, its maximum intensity has a definite limitation.ACI specifies that this material ultimate compression strength of 28 days should at below 8.3MPa.Estimate to excavate after constructing, for adapting to service requirements, relevant " fluidisation soil reason soil utilizes technical manual " is then defined as 0.5 ~ 1.0MPa again.
The nearly more than ten years, compaction material starts emerging at home, there is a collection of correlation technique invention, as patent of invention 200810171974.0, 201110023865.6, 201110405857.8, 201210081059.9, 201210517862.2, 201210557658.3, 201210557761.8, 201310284360.4, 201310306381.1, 201310347147.3, 201310480909.7, 201410035688.7, 201410234488.4 etc., these patents are substantially all be major gelled material with cement, auxiliary some flyash of admixture and other sand class fine aggregates, and some supplementary additives, realize the workability that whole system is good, mobility, condensation effect and intensity index.Have partial monopoly also to use special cement, usage quantity is comparatively large, is unfavorable for energy-saving and emission-reduction, comprehensive utilization gives up.Flyash is adopted to be main gel gel material in the present invention, ground slag does supplementary cementitious material, other industrial solid castoffs are as fine aggregate, active by the mode excited cementing material of alkali-activated carbonatite, adding portion heavy metal ion solidifying agent, setting accelerator, hardening accelerator etc., realize the controlled synthesis of low strength compaction material again.Profit is useless, cost is low, environmental protection and energy saving, and, low cost filling useless to mine energy-saving and environmental protection, profit has extensively deep meaning.
Summary of the invention:
In order to improve the volume of solid waste in mine filling material produce, the invention provides a kind of preparation technology simple, Novel coal ash alkali-activated carbonatite compaction material of stable performance and preparation method thereof.
The present invention is achieved by the following technical solutions:
The raw material of compaction material of the present invention, main raw material comprises gelling material, fine aggregate, exciting agent, heavy metal ion solidifying agent, setting accelerator and water, and described compaction material is made up of following raw material:
Gelling material: the 20 ~ 40wt.% accounting for starting material total mass, the mass ratio of flyash and ground slag is between 1:1 ~ 4:1;
Fine aggregate: the 20 ~ 40wt.% accounting for starting material total mass;
Alkali-activator: the 10 ~ 25wt.% accounting for starting material total mass, exciting agent comprises sodium (potassium) water glass, NaOH/KOH, water.The modulus of exciting agent is 1.0 ~ 2.0, and mass concentration is at 15 ~ 40wt.%;
Heavy metal ion solidifying agent: the 0.1 ~ 5wt.% accounting for starting material total mass;
Setting accelerator: the 0.01 ~ 0.5wt.% accounting for starting material total mass; Residual mass is water.
The preparation method of above-mentioned compaction material of the present invention, comprises step:
1) by gelling material, fine aggregate, heavy metal ion solidifying agent, setting accelerator and water mix and blend 10 ~ 30min;
2) NaOH/KOH is dissolved in sodium (potassium) water glass and is configured to alkali-activator, ageing 24 ~ 48h;
3) mixed with solid powder by alkali-activator, then add part water, stir 1 ~ 10min, make the initial flow degree of slurry between 150 ~ 250cm, workability is good, and within 1 hour, degree of mobilization remains more than 50% of initial flow degree;
4) presetting period of compaction material is 2 ~ 4h, and final setting time is 4 ~ 8h; Within 28 days, ultimate compression strength is at 1-5MPa, and dry density is at 1000 ~ 1500kg/m
3.
Preparation technology of the present invention is simple, excellent property, stable, and cost is lower.
Specific implementation method:
In Example formulations by compaction material of the present invention, each quality of material percentage ratio carries out preparing burden (see table 1) and above-mentioned preparation technology prepares filling, and fresh slurry is injected 40mm × 40mm × 160mm mould molding, continue in standard curing box maintenance to 28 day after the demoulding, (maintaining box temperature remains on about 20 DEG C, control relative humidity and be greater than 90%), obtained compaction material test block.
Test according to the degree of mobilization of the compaction material specified in " concrete admixture uniformity experimental technique " GB/T8077-2012, " Test method for strength of hydraulic cement mortar " GB/T17671-1999 and " lightweight aggregate concrete technology specification " JG/J51-2002,28 days ultimate compression strength and unit dry weight, average test 3 groups of samples are averaged, and obtain table 2;
Table 1 foam paste filling material of the present invention Example formulations composition (wt.%)
Table 2 compaction material the performance test results of the present invention
| Test event | Comparative example | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Initial flow degree/mm | 210 | 200 | 203 | 190 | 180 | 180 | 200 |
| 0.5h degree of mobilization/mm | 170 | 165 | 160 | 150 | 150 | 156 | 158 |
| 1h degree of mobilization/mm | 110 | 108 | 120 | 103 | 100 | 96 | 102 |
| Presetting period/min | 2.5 | 2.8 | 3 | 2 | 2.5 | 1.5 | 3 |
| Final setting time/min | 3.5 | 4 | 4.5 | 4 | 4 | 3 | 5 |
| 28d ultimate compression strength/MPa | 2.5 | 2.3 | 1.9 | 1.6 | 1.8 | 1.8 | 1.7 |
| Unit dry weight/kg/m | 1698.75 | 1641.25 | 1636.25 | 1633.75 | 1758.75 | 1767.5 | 1833.75 |
The present invention is with flyash and solid waste fine aggregate for main raw material, and in conjunction with other raw mineral materialss, the chemi-excitation technology of application of advanced, prepares a kind of compaction material, and product can be used as the underground filling of colliery, metallic ore and other nonmetalliferous ores.
Compaction material prepared by the raw materials such as powder application coal ash of the present invention, solid waste fine aggregate, and manufacture craft is simple, dependable performance, good stability.
The above; be only the embodiment that the present invention optimizes, but protection scope of the present invention is not limited thereto, and is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (4)
1. a compaction material, is made up of gelling material, fine aggregate, exciting agent, heavy metal ion solidifying agent, setting accelerator and water.
2. compaction material according to claim 1, described gelling material is the mixture of flyash and ground slag; Described fine aggregate is one or more mixing of slag, manganese slag, phosphorus slag, copper ashes, plumbous cadmia, red mud, coal gangue, power plant soot slag, siliceous CHARACTERISTICS OF TAILINGS SAND, aluminium matter CHARACTERISTICS OF TAILINGS SAND or sulphur matter CHARACTERISTICS OF TAILINGS SAND; Described alkali-activator comprises sodium (potassium) water glass and NaOH/KOH; Described heavy metal ion solidifying agent is sodium sulphite; Described setting accelerator also has early powerful, be sodium-chlor, sodium sulfate, sodium carbonate, sodium metaaluminate, calcium chloride, calcium stearate one or more.
3. compaction material according to claim 2, comprises the raw material of following quality proportioning:
Gelling material: the 20 ~ 40wt.% accounting for starting material total mass, the mass ratio of flyash and ground slag is between 1:1 ~ 4:1;
Fine aggregate: the 20 ~ 40wt.% accounting for starting material total mass;
Alkali-activator: the 10 ~ 25wt.% accounting for starting material total mass, exciting agent comprises sodium (potassium) water glass, NaOH/KOH, water.The modulus of exciting agent is 1.0 ~ 2.0, and mass concentration is at 15 ~ 40wt.%;
Heavy metal ion solidifying agent: the 0.1 ~ 5wt.% accounting for starting material total mass;
Setting accelerator: the 0.01 ~ 0.5wt.% accounting for starting material total mass; Residual mass is water.
4. compaction material according to claim 2,
Flyash can be former ash or sorting ash, SiO
2mass content>=50wt.%, Al
2o
3mass content>=20wt.%;
The particle diameter of ground slag and fine aggregate is 1 μm≤D
50≤ 100 μm, particle fineness 0.080mm tails over≤5 ~ 25%, carbon content≤5%, loss on ignition≤10%;
Glass bead is pearlstone or soda lime borosilicate glass material, and particle diameter is at 15 ~ 100 μm, and thermal conductivity is 0.01-0.05W/mK, and water-intake rate is less than 50%, and melt temperature is greater than 800 DEG C.
Exciting agent comprises sodium (potassium) water glass, NaOH/KOH, water.The modulus of exciting agent is 1.0 ~ 2.0, and mass concentration is at 15 ~ 40wt.%;
Heavy metal ion solidifying agent and setting accelerator are all technical grade chemical reagents, and purity is more than 90%.
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| CN201510181543.2A CN104829200A (en) | 2015-04-16 | 2015-04-16 | Alkali-activated fly-ash filling material and preparation method thereof |
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|---|---|---|---|
| CN201510181543.2A CN104829200A (en) | 2015-04-16 | 2015-04-16 | Alkali-activated fly-ash filling material and preparation method thereof |
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Cited By (24)
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| CN105152601A (en) * | 2015-09-28 | 2015-12-16 | 太原理工大学 | Preparation method of gangue base mine cemented filling material |
| CN105565691A (en) * | 2015-12-21 | 2016-05-11 | 燕京理工学院 | Lead-zinc smelting slag based geopolymer gelling material and preparation method thereof |
| CN105693118A (en) * | 2016-01-31 | 2016-06-22 | 西安建筑科技大学 | Preparation method of alkali-activated phosphorus slag-based cementing material with adjustable and controllable conductivity |
| CN105693120A (en) * | 2016-01-31 | 2016-06-22 | 西安建筑科技大学 | Preparation and application of conductivity-controllable fly ash-based geopolymer material |
| CN105753418A (en) * | 2016-01-27 | 2016-07-13 | 济南大学 | Mine filling cementing material prepared by utilizing industrial by-product gypsum and preparation method for mine filling cementing material |
| CN105819822A (en) * | 2016-03-10 | 2016-08-03 | 湖北工业大学 | Phosphorus-based grouting filling material suitable for old goaf treatment |
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- 2015-04-16 CN CN201510181543.2A patent/CN104829200A/en active Pending
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| CN105152601A (en) * | 2015-09-28 | 2015-12-16 | 太原理工大学 | Preparation method of gangue base mine cemented filling material |
| CN105565691A (en) * | 2015-12-21 | 2016-05-11 | 燕京理工学院 | Lead-zinc smelting slag based geopolymer gelling material and preparation method thereof |
| CN105753418A (en) * | 2016-01-27 | 2016-07-13 | 济南大学 | Mine filling cementing material prepared by utilizing industrial by-product gypsum and preparation method for mine filling cementing material |
| CN105693118A (en) * | 2016-01-31 | 2016-06-22 | 西安建筑科技大学 | Preparation method of alkali-activated phosphorus slag-based cementing material with adjustable and controllable conductivity |
| CN105693120A (en) * | 2016-01-31 | 2016-06-22 | 西安建筑科技大学 | Preparation and application of conductivity-controllable fly ash-based geopolymer material |
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