CN102701616B - High-strength magnesian coal ash clinker-free cement - Google Patents
High-strength magnesian coal ash clinker-free cement Download PDFInfo
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- CN102701616B CN102701616B CN201210174414.7A CN201210174414A CN102701616B CN 102701616 B CN102701616 B CN 102701616B CN 201210174414 A CN201210174414 A CN 201210174414A CN 102701616 B CN102701616 B CN 102701616B
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- flyash
- free cement
- strength
- coal ash
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- 239000004568 cement Substances 0.000 title claims abstract description 24
- 239000010883 coal ash Substances 0.000 title abstract 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 6
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 5
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 5
- WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 claims abstract description 5
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 4
- 239000010881 fly ash Substances 0.000 claims description 35
- 235000012245 magnesium oxide Nutrition 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 235000013311 vegetables Nutrition 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 238000004512 die casting Methods 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 150000003016 phosphoric acids Chemical class 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 4
- 229940061634 magnesium sulfate heptahydrate Drugs 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229920002978 Vinylon Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000010030 laminating Methods 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
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011378 shotcrete Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to high-strength magnesian coal ash clinker-free cement, which comprises the following raw materials in part by weight: 100 parts of coal ash, 30 to 40 parts of light roasting magnesium oxide, 10 to 15 parts of magnesium sulfate heptahydrate, 2 to 4 parts of calcium sulfate, ferrous sulfate or aluminum sulfate, 0.5 to 1.0 part of phosphoric acid and 50 to 100 parts of water. The high-strength magnesian coal ash clinker-free cement has the advantages that a large amount of coal ash is utilized, and produced wastes are used as production raw materials and are put into use, so that environmental pollution is reduced; and the product is long in service life and high in board strength, and is widely applied to wallboards, suspended ceilings, decorative materials and furniture.
Description
Technical field
The present invention relates to concrete-containing building material product scope.
Background technology
Existing flyash clinker-free cement be mainly utilize lime (calcium oxide) as alkali-activator, gypsum (calcium sulfate) as sulphate activation agent acting in conjunction in flyash, a kind of inorganic coagulation material generating in hydration reaction.Such as the patent of invention " 94111221 " of China, " 96118276 " etc.This flyash clinker-free cement is only equivalent to 42.5～62.5 strength grade cement, and will pass through vapor cure.
Summary of the invention
The object of the invention is to be only equivalent to 42.5～62.5 strength grade cement for existing flyash clinker-free cement, and will provide a kind of high-strength magnesia flyash clinker-free cement through the deficiency of vapor cure.
Parts by weight of raw materials proportioning of the present invention is:
30～40 parts of 100 parts of light calcined magnesias of flyash
2～4 parts, 10～15 parts of calcium sulfate of magnesium sulfate heptahydrate, ferrous sulfate or Tai-Ace S 150
50～100 parts, 0.5～1.0 part of water of phosphoric acid or phosphoric acid;
Ingredient requirement: flyash is containing CaO≤7%, Xi Du≤0.045mm, square hole sieve Shai Yu≤12%; Shao Shi Liang≤5%; Xu water yield Bi≤95%; Other water-fast solid material fineness≤0.08mm, square hole sieve tails over≤and 10%.
Advantage of the present invention is:
1. magnesia flyash clinker-free cement, has utilized flyash in a large number, and production waste is come into operation again as raw materials for production, has reduced environmental pollution;
2. flyash is to contain active SiO2, active al2o3 pozzolanic materials, due to pozzolanic reaction, and resultant Stability Analysis of Structures, the long service life of goods.
3. the wood-based plate intensity of magnesia flyash clinker-free cement and low elastic modulus vegetable fibre laminating production is high, there is fire prevention, waterproof, anti-ly go mouldy, Anti-moth-eating, can follow closely, can saw, can dig, can bore, containing advantages such as formaldehyde, be the wood-based plate that substitutes organic gel plywood, organic fibre plate, core-board etc.Be widely used in wallboard, furred ceiling, decoration decorative materials, furniture.
Embodiment
The selected flyash of the present invention requires CaO≤7%, and the acid flyash of this low calcium F class only has the flyash of hard coal and pitch coal just can reach.Low calcium original state flyash must be processed, and adopts the methods such as grinding, screening, air classifying, improves active SiO2, active al2o3 content in flyash; The too high flyash of loss on ignition, except adopting method for sieving, also can adopt the methods such as flotation, electrostatic separation.Prepare the low calcium fly ash of magnesia flyash clinker-free cement after treatment, require Xi Du≤0.045mm, square hole sieve Shai Yu≤12%; Shao Shi Liang≤5%; Xu water yield Bi≤95%.The magnesia flyash clinker-free cement that adopts this flyash to prepare has the performance of the class g cements such as high strength; And the magnesia flyash clinker-free cement of undressed low calcium original state flyash preparation also can only reach the requirement of 42.5～62.5 strength grade cement.
Levigate Zhi≤the 0.08mm of water-fast solid material in the present invention, square hole sieve Shai Yu≤10%; And water-soluble solid material is used being dissolved in the water while preparing magnesia flyash clinker-free cement after generating solution.
By 100 parts, flyash, 30～40 parts of light calcined magnesias, 1.5～3 parts, gypsum, be dissolved in 50～100 parts of water with 0.5～1.0 part of 10～15 parts of magnesium sulfate heptahydrates, ferrous sulfate or 0.5～1.0 part, Tai-Ace S 150, phosphoric acid or phosphoric acid salt, stir and only starch for magnesia flyash clinker-free cement.After clean slurry is made into, can with fiber composite.If employing glass fibre, mod-vinylon (PVA) fiber, improved polypropylene (PP) fiber, can adopt cutting gunite to mix; If adopt the chopped vegetable fibre through loosening, can mix in Mill with roller.Mixed slip can adopt die casting or the moulding of vibrating; Producing flat board can roll-in or concora crush moulding; Need to adopt glasscloth can roll-in time lay glass fibre molding with cloth.After product molding, at 35 ℃～45 ℃ insulation 12h～8h, then natural curing 7d～15d, just can obtain the magnesia flyash clinker-free cement of high-intensity fiber reinforcement based articles.
Embodiment: produce fireproof inorganic composition board
By low calcium fly ash 100Kg, light calcined magnesia 40kg, gypsum 3Kg, stir into magnesia flyash clinker-free cement with the aqueous solution that is dissolved in magnesium sulfate heptahydrate 15Kg, ferrous sulfate 1Kg in 75Kg water, phosphoric acid 0.8kg and only starch, drop into again through the chopped vegetable fibre of loosening (as sawdust, straw), stir into slip.By rolling equipment, complete lay glasscloth and slip, make slab.Slab is incubated 12h in 37 ℃ of curing rooms, and after natural curing 9d, cutting edge finishing has just become fireproof inorganic composition board.
Principle of the present invention be utilize magnesium oxide as complex vitriolates such as alkali-activator and magnesium sulfate as sulphate activation agent acting in conjunction in flyash, in hydration reaction, generate the inorganic coagulation material contain the compositions such as hydrated magnesium silicate, aquation sulphur magnesium aluminate.Test tries its product ultimate compression strength >=80MPa, folding strength >=10MPa; Basicity low (pH value 7.5～8.5) is little to metal material corrodibility; Can be directly and the compound high-strength plate of making of vegetable fibre.After product molding, only need in 37 ℃～45 ℃, be incubated 12h～8h, then natural curing 7d～15d, just can meet the requirement of strength of goods.
Claims (1)
1. the magnesia flyash clinker-free cement of a high-intensity fiber reinforcement based articles, it is characterized in that: by 100 parts, flyash, 30～40 parts of light calcined magnesias, 1.5～3 parts, gypsum, 10～15 parts of magnesium sulfate heptahydrates, 0.5～1.0 part, ferrous sulfate or Tai-Ace S 150, 0.5～1.0 part of phosphoric acid or phosphoric acid salt are dissolved in 50～100 parts of water, stir and only starch for magnesia flyash clinker-free cement, after clean slurry is made into, with fiber composite, the chopped vegetable fibre of employing through loosening, in Mill with roller, mix, mixed slip adopts die casting or the moulding of vibrating, after product molding, at 35 ℃～45 ℃ insulation 12h～8h, natural curing 7d～15d again, just make the magnesia flyash clinker-free cement of high-intensity fiber reinforcement based articles.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210174414.7A CN102701616B (en) | 2012-05-31 | 2012-05-31 | High-strength magnesian coal ash clinker-free cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210174414.7A CN102701616B (en) | 2012-05-31 | 2012-05-31 | High-strength magnesian coal ash clinker-free cement |
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| Publication Number | Publication Date |
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| CN102701616A CN102701616A (en) | 2012-10-03 |
| CN102701616B true CN102701616B (en) | 2014-03-12 |
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| CN201210174414.7A Active CN102701616B (en) | 2012-05-31 | 2012-05-31 | High-strength magnesian coal ash clinker-free cement |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326728A (en) * | 2014-09-04 | 2015-02-04 | 浙江天仁风管有限公司 | Enhanced magnesium oxysulfate cement, and method for making sheets by using cement |
| CN109809722B (en) * | 2019-04-04 | 2021-06-25 | 中南大学 | Calcium-magnesium sulfate double-salt cementing material and preparation method and application thereof |
| CN109851310A (en) * | 2019-04-11 | 2019-06-07 | 辽宁科技大学 | A kind of high additive solid waste lightweight fireproof insulating walling and production method |
| CN113020212B (en) * | 2021-03-08 | 2022-04-08 | 王常清 | Method for treating and recycling waste incineration fly ash |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010174A (en) * | 2010-11-12 | 2011-04-13 | 中国科学院青海盐湖研究院 | Thermal insulation mortar |
| CN102344277A (en) * | 2010-08-05 | 2012-02-08 | 卞智铨 | Magnesium phosphate cement foamed lightweight wall building block |
| CN102399079A (en) * | 2010-09-17 | 2012-04-04 | 李井刚 | Lightweight magnesium oxysulfate building material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5019308B2 (en) * | 2006-03-30 | 2012-09-05 | 公益財団法人北九州産業学術推進機構 | Porous fireproof insulation board and method for producing the same |
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- 2012-05-31 CN CN201210174414.7A patent/CN102701616B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344277A (en) * | 2010-08-05 | 2012-02-08 | 卞智铨 | Magnesium phosphate cement foamed lightweight wall building block |
| CN102399079A (en) * | 2010-09-17 | 2012-04-04 | 李井刚 | Lightweight magnesium oxysulfate building material |
| CN102010174A (en) * | 2010-11-12 | 2011-04-13 | 中国科学院青海盐湖研究院 | Thermal insulation mortar |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-269515A 2007.10.18 |
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| CN102701616A (en) | 2012-10-03 |
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