CN105859243A - Magnesium oxysulfate cement foamed bricks and preparation method therefor - Google Patents
Magnesium oxysulfate cement foamed bricks and preparation method therefor Download PDFInfo
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- CN105859243A CN105859243A CN201610183175.XA CN201610183175A CN105859243A CN 105859243 A CN105859243 A CN 105859243A CN 201610183175 A CN201610183175 A CN 201610183175A CN 105859243 A CN105859243 A CN 105859243A
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- 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
- C04B28/30—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 magnesium cements or similar cements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention relates to the field of building ware and particularly relates to magnesium oxysulfate cement foamed bricks and a preparation method therefor. The magnesium oxysulfate cement foamed bricks disclosed by the invention are prepared from the raw materials in parts by weight: 100 parts of magnesium sulfate, 50-200 parts of magnesia, 0-500 parts of filler and 30-350 parts of water, 8-50 parts of hydrogen peroxide and an admixture, wherein the addition level of the admixture is 0.1% to 5% the weight of magnesium oxysulfate cement. The magnesium oxysulfate cement foamed bricks disclosed by the invention are low in density, high in mechanical strength, small in coefficient of thermal conductivity, low in water absorption rate and good in humidity resistance and has a good fireproof effect. The preparation method for the magnesium oxysulfate cement foamed bricks disclosed by the invention is simple and is applicable to large-scale popularization and application.
Description
Technical field
The present invention relates to building product field, specifically, relate to a kind of magnesium oxysulfide concrete foamed bricks and preparation method thereof.
Background technology
In the face of country completely forbids the use of Rhizoma Begoniae Willsonii, i.e. sintered clay brick, foam concrete block is widely used in multiple
In architectural engineering.Traditional solid clay brick make always according to: cut the earth and manufacturing process that clay base is fired.One
Block Rhizoma Begoniae Willsonii, will do raw material times over the soil of its volume, need substantial amounts of soil during making, will certainly take substantial amounts of arable land.
And along with China's construction material power conservation requirement and the raising of environmental requirement, more and more higher to the heat insulation effect of body of wall itself.
It is to use garbage to be raw material, become foam through mechanical foaming, stirring that non-evaporating foam concrete block makes
Concrete, cuts into different foam concrete blocks and Non-steamed aerated block utilizing cutting machine.The raw material used is: fine coal
Ash, sand, stone powder, mine tailing, gangue, building waste the like waste, as long as being combined the most permissible by a certain percentage with cement.Non-evaporating
Foam concrete equipment produces foam concrete block and has the effects such as insulation, heat insulation, fire prevention, antidetonation, moreover it is possible to alleviate body of wall oneself
Weight.At present, cement used by foam concrete mostly is portland cement, uses " two mill single firing " technique, and power consumption is big, by silicate cement
The foaming turn that mud foaming prepares generally can't resolve the contradiction between unit weight and intensity, is i.e. unable to reach low unit weight high intensity
Foaming turn.
For the problems referred to above, patent of invention CN103951337 discloses a kind of low-density and high-strength rapid hardening foam cement and protects
Temperature plate, uses portland cement can reach as gel rubber material, the dry density of the foaming insulation board prepared in this invention
To 100～200kg/m3, but comprcssive strength is only 0.3～1.0MPa.
The defect existed for prior art, the special proposition present invention.
Summary of the invention
The primary goal of the invention of the present invention is to propose a kind of magnesium oxysulfide concrete foamed bricks.
Second goal of the invention of the present invention is to propose the preparation method of this magnesium oxysulfide concrete foamed bricks.
In order to complete the purpose of the present invention, the technical scheme of employing is:
A kind of magnesium oxysulfide concrete foamed bricks, described magnesium oxysulfide concrete foamed bricks prepared by magnesium oxysulfide concrete, described magnesium oxysulfide
The raw material of cement contains: magnesium sulfate 100 weight portion, magnesium oxide 50～200 weight portion, filler 0～500 weight portion, water 30～
350 weight portions, foaming agent 8～50 weight portion；It is preferably: magnesium sulfate 100 weight portion, magnesium oxide 50～162 weight portion, filler 50
～400 weight portions, water 30～300 weight portion, foaming agent 10～40 parts；More preferably: magnesium sulfate 100 weight portion, magnesium oxide 80
～120 weight portions, filler 50～200 weight portion, water 80～120 weight portion, foaming agent 15～25 weight portion；Described magnesium oxysulfide water
Possibly together with additive in mud, the addition of described additive is the 0.1～5% of described magnesium oxysulfide concrete weight.
Preferably, at least one in the magnesium sulfate containing 1～12 water of crystallization of described magnesium sulfate.
Preferably, at least during described magnesium oxide is selected from magnesite light burnt powder, dolomite light burnt powder, analytical pure magnesium oxide
Kind；Preferably, in described magnesite light burnt powder and described dolomite light burnt powder, the content of magnesium oxide is 65～85%.
Preferably, described filler is selected from aglite, preferably flyash, slag micropowder, silicon ash, wood flour, Gypsum Fibrosum powder, in vain
At least one in marble dust, shale powder, the particle diameter of filler is 300 mesh～800 mesh.
Preferably, described additive selected from additive A, additive B, additive C, additive D, additive E, additive F,
At least one in additive G, additive H；
Described additive A is selected from carboxylic acid or its salt, the anhydride of carboxylic acid or its salt, dicarboxylic acids or its salt, sulfonic acid, sulfonic acid
At least one in anhydride or its salt, phosphonic acids, the anhydride of phosphonic acids or its salt, phosphoric acid or its salt, boric acid, Borax, sodium silicate；
Described carboxylic acid represents with R-COOH, and described sulfonic acid is with R-SO3H represents, described dicarboxylic acids is with HOOC-R-R-COOH
Representing, described phosphonic acids is with RP (O) (OH)2Or R2P (O) OH represents；R is selected from substituted or unsubstituted C1-15Alkyl, substituent group is selected from
Group containing aerobic, nitrogen, phosphorus or sulphur atom；
Preferably, described additive A is selected from oxalic acid, phosphoric acid, dihydric phosphate, disodium-hydrogen, tertiary sodium phosphate, six inclined phosphorus
Acid sodium, formic acid, formates, tartaric acid, tartrate, lactic acid, aminoacid, salicylic acid, sulfosalicylic acid, malonic acid, succinic acid,
At least one in sucrose, glucose, sodium gluconate, sodium acetate；
Described additive B is selected from Lignins water reducer, LOMAR PWA EINECS 246-676-2 based water reducer, water-soluble resin water reducer or polycarboxylic acids
At least one in water reducer；Described Lignins water reducer is selected from calcium lignosulfonate, sodium lignin sulfonate, lignin sulfonic acid
At least one in magnesium；Described water-soluble resin water reducer is selected from melmac, coumarone resin；
Described additive C is selected from chloride salt early strength agent, Sulfates early strength agent or organic amine early strength agent selected from early strength agent；
At least one in calcium chloride, potassium chloride, aluminum chloride or ferric chloride of described chloride salt early strength agent, preferably calcium chloride；
At least one in sodium sulfate, Calcium hyposulfite, aluminum sulfate or aluminium potassium sulfate of described Sulfates early strength agent, preferably sulfur
Acid sodium；Described organic amine early strength agent is selected from triethanolamine or triisopropanolamine, preferably triethanolamine；
Described additive D is selected from saccharide retarder or lignin sulfonate retarder, is preferably wood calcium and molasses, more has
Elect Mel as；
Described additive E is in polymer, polymer monomer, albumen, polypeptide, starch or anion surfactant
At least one；Polymer is selected from polyvinyl alcohol, polypropylene, polyacrylonitrile, lignin, hydroxypropyl methyl cellulose；Polymer list
Body is selected from acrylamide, acrylic acid methyl ester., methyl methacrylate, vinyl alcohol, vinyl acetate, acrylonitrile, styrene, fourth two
Alkene, isoprene or propylene；Anion surfactant selected from sodium lauryl sulphate, polyoxyethylenated alcohol sodium sulfate,
α-sodium olefin sulfonate；
Described additive F selected from soluble resin hydrochlorate, Wen Shaer resin, saponification tell your oil, dodecyl sodium sulfate,
Dodecylbenzene sodium sulfonate, sulfonated petroleum hydroxyl class soluble-salt at least one；
Described additive G is selected from silane or siloxanes；
Described additive H is fine selected from polypropylene fibre, polyacrylonitrile fibre, lignin fibre or hydroxypropyl methyl cellulose
At least one in dimension.
Preferably, the addition of described additive A is the 0.1～0.8% of described magnesium oxysulfide concrete weight, preferably 0.4～
0.5%；
The addition of described additive B is the 0.1～0.8% of described magnesium oxysulfide concrete weight, preferably 0.2～0.5%；
The addition of described additive C is the 0.1～1.2% of described magnesium oxysulfide concrete weight, preferably 0.4～1%；
The addition of described additive D is the 0.1～1.0% of described magnesium oxysulfide concrete weight, preferably 0.2～0.5%；
The addition of described additive E is the 0.2～1.2% of described magnesium oxysulfide concrete weight, preferably 0.4～1.0%；
The addition of described additive G is the 0.05～0.2% of described magnesium oxysulfide concrete weight, preferably 0.1～0.2%；
The addition of described additive H is the 1.5～3% of described magnesium oxysulfide concrete weight, preferably 1.6～2.5%.
Preferably, foaming agent is in hydrogen peroxide, sodium bicarbonate, ammonium carbonate, azodicarbonamide or azodiisobutyronitrile
At least one, preferably hydrogen peroxide.
Preferably, the density of described magnesium oxysulfide concrete foamed bricks is 100～200kg/m3, comprcssive strength 3～5MPa, heat conduction
Coefficient 0.020～0.048w/m K, fire-protection rating is A1 level.
The invention still further relates to the preparation method of this magnesium oxysulfide concrete foamed bricks, comprise the following steps:
Weigh raw material in proportion, magnesium sulfate, magnesium oxide, additive and water are mixed and stirred for, add filler and continue stirring
Obtain cement grout, in cement grout, pour hydrogen peroxide stirring into, pour mould into, stand, natural curing 15 minutes, the demoulding, cut
Cut, maintenance 3～7 days, obtain magnesium oxysulfide foamed bricks.
The Advantageous Effects that the present invention can obtain is:
The density of the magnesium oxysulfide concrete foamed bricks of the present invention is low, and mechanical strength is high, makes the foamed bricks of the present invention have
Purposes widely.Can be used for exterior wall enclosure, interior wall partition etc..
The heat conductivity of the magnesium oxysulfide concrete foamed bricks of the present invention is low, has good heat-insulating property；The sulfur oxygen of the present invention
Magnesium cement foamed bricks water absorption rate W.A. (%) is less than 7.5%, has good humidity resistance；The magnesium oxysulfide concrete foaming of the present invention
Brick, due to uniform in foaming, therefore has good sound insulation and noise reduction effect；The magnesium oxysulfide concrete foamed bricks fire-protection rating of the present invention is
A1 level, high temperature does not play end, not efflorescence, has good flameproof effect.
Below in conjunction with specific embodiment, the application is expanded on further.Should be understood that these embodiments are merely to illustrate the application
Rather than restriction scope of the present application.
Detailed description of the invention
The present invention relates to a kind of magnesium oxysulfide concrete foamed bricks, magnesium oxysulfide concrete foamed bricks is prepared by magnesium oxysulfide concrete, sulfur oxygen
The raw material of magnesium cement contains: magnesium sulfate 100 weight portion, magnesium oxide 80～120 weight portion, filler 50～200 weight portion, water 80
～120 weight portions, foaming agent 15～25 parts；Possibly together with 0.1～5% that addition is magnesium oxysulfide concrete weight in magnesium oxysulfide concrete
Additive, and preferably 0.1～3%.
Poor toughness, setting time that the modified magnesium oxysulfide concrete of foaming needs to overcome common modifications magnesium oxysulfide concrete to exist are long
The defect of two performances.In order to overcome drawbacks described above, the formula of magnesium oxysulfide concrete is improved by the present invention, make employing this
The toughness of foam cement prepared by the magnesium oxysulfide concrete of bright formula is greatly improved, and shortens magnesium oxysulfide concrete
Setting time more than 50%, within 2 hours, i.e. reach initial set.
Wherein, at least one in the magnesium sulfate containing 1～12 water of crystallization of magnesium sulfate, preferably seven water sulphuric acid
Magnesium.The purity of magnesium sulfate is not specially required by the present invention, all can use between 65～99%, and optimum is 95～99%.
Wherein, at least one in magnesite light burnt powder, dolomite light burnt powder, analytical pure magnesium oxide of magnesium oxide；Pedicellus et Pericarpium Trapae
Magnesium ore deposit light burnt powder, the low cost of dolomite light burnt powder, it is preferred that in magnesite light burnt powder and dolomite light burnt powder, magnesium oxide contains
Amount is 65～85%, if content of magnesia deficiency can be allocated by analytically pure magnesium oxide.
The additive added in the present invention is selected from additive A, additive B, additive C, additive D, additive E, additional
At least one in agent F, additive G, additive H；
Described additive A is selected from carboxylic acid or its salt, the anhydride of carboxylic acid or its salt, dicarboxylic acids or its salt, sulfonic acid, sulfonic acid
At least one in anhydride or its salt, phosphonic acids, the anhydride of phosphonic acids or its salt, phosphoric acid or its salt, boric acid, Borax, sodium silicate；
Described carboxylic acid represents with R-COOH, and described sulfonic acid is with R-SO3H represents, described dicarboxylic acids is with HOOC-R-R-COOH
Representing, described phosphonic acids is with RP (O) (OH)2Or R2P (O) OH represents；R is selected from substituted or unsubstituted C1-15Alkyl, substituent group is selected from
Group containing aerobic, nitrogen, phosphorus or sulphur atom；
Preferably, described additive A is selected from oxalic acid, phosphoric acid, dihydric phosphate, disodium-hydrogen, tertiary sodium phosphate, six inclined phosphorus
Acid sodium, formic acid, formates, tartaric acid, tartrate, lactic acid, aminoacid, salicylic acid, sulfosalicylic acid, malonic acid, succinic acid,
At least one in sucrose, glucose, sodium gluconate, sodium acetate；More preferably oxalic acid, phosphoric acid, malonic acid, succinic acid, winestone
Acid, lactic acid.
Additive B is water reducer, including: Lignins water reducer, LOMAR PWA EINECS 246-676-2 based water reducer, water-soluble resin water reducer,
Polycarboxylate water-reducer etc..
Wherein, Lignins water reducer includes calcium lignosulfonate (wood calcium), sodium lignin sulfonate (wood sodium), sulfomethylated lignin
Acid magnesium (wood magnesium) etc..
Naphthalene water reducer, is that sulfonated the retraction with methanol of the homologue with naphthalene or naphthalene forms.
The water reducer that water-soluble resin water reducer is made with some water-soluble resins for primary raw material, such as tripolycyanamide tree
Fat, coumarone resin etc.；Such water reducer reinforced effects is notable, for high efficiency water reducing agent.
Polycarboxylate water-reducer includes: with acrylic or methacrylic acid as main chain, the polyethers of the different side chain lengths of grafting and
The polyethers being the different side chain lengths of main chain grafting with maleic anhydride.
The function of water reducer is for reducing surface tension, and cement granules is more easy to moisten, and makes aquation relatively more abundant, thus improves mixed
The intensity of solidifying soil.
Additive C is early strength agent, and early strength agent is to accelerate the development of expanded material early strength, and to later strength without notable shadow
The additive rung, including: chloride salt early strength agent, Sulfates early strength agent, organic amine early strength agent etc..
Wherein, chloride salt early strength agent mainly has calcium chloride, potassium chloride, aluminum chloride and ferric chloride etc., preferably chlorination
Calcium.Concrete 3d intensity can be made after interpolation to improve 50%～10%, and 7d intensity improves 20%～40%, can reduce concrete simultaneously
The freezing point of middle water, prevents concrete early freezc.
Sulfates early strength agent, mainly has sodium sulfate, Calcium hyposulfite, aluminum sulfate, aluminium potassium sulfate etc., preferably sulphuric acid
Sodium, can make the time reaching concrete design strength 70% can shorten about half.
Organic amine early strength agent mainly has triethanolamine, triisopropanolamine etc., preferably triethanolamine, can make concrete
Early strength improves.
Additive D is retarder, and retarder refers to delay concrete coagulating time, and develops late strength of concrete
The additive having no adverse effect, including: saccharide, such as molasses；Lignin sulfonate, such as wood calcium, wood sodium.It is preferably wood calcium and sugar
Honey, more preferably Mel.
Additive E is foam stabilizer, is used for improving bubble stability, extends the bubble burst half-life, including: 1, macromolecular complex
Matter, including polyvinyl alcohol, one in the fiber such as polypropylene, polyacrylonitrile, polyester, lignin, hydroxypropyl methyl cellulose or
Several combinations, and the macromolecular substances such as albumen, polypeptide, starch, or for the monomeric substance that can be polymerized, preferably acryloyl
Amine, acrylic acid methyl ester., methyl methacrylate, vinyl alcohol, vinyl acetate, acrylonitrile, styrene, butadiene, isoprene,
Propylene；2, anion surfactant, such as sodium lauryl sulphate (K12), polyoxyethylenated alcohol sodium sulfate (AES), α-
The foam stabilizer of the anion surfactants such as sodium olefin sulfonate (AOS).
Additive F is air entraining agent, as soluble resin hydrochlorate (rosin acid), Wen Shaer resin, saponification tell you oil, 12
Sodium alkyl sulfonate, dodecylbenzene sodium sulfonate, sulfonated petroleum hydroxyl class soluble-salt in the combination of one or more.
Additive H is hydrophober, selected from the hydrophober such as silane, siloxanes.
Additive G is fiber, for improving the deformability of foamed products, toughness.Selected from polypropylene, polyacrylonitrile, gather
The combination of one or more in the fibers such as fat, lignin, hydroxypropyl methyl cellulose, and other may be used for cement foamed
Fiber product.
The filler of the present invention is selected from aglite, preferably flyash, slag micropowder, silicon ash, wood flour, Gypsum Fibrosum powder, white clouds
At least one in stone powder, shale powder.The particle diameter of filler is more than 300 mesh, adds filler and can reduce production cost.
The foaming agent of the present invention is in hydrogen peroxide, sodium bicarbonate, ammonium carbonate, azodicarbonamide or azodiisobutyronitrile
At least one, preferably hydrogen peroxide.
Preferably, the additive formula of the magnesium oxysulfide concrete foamed bricks of the present invention is: tartaric acid, phosphoric acid, oxalic acid and nitric acid
The mixture of salt.
The density of the magnesium oxysulfide concrete foamed bricks of the present invention is 100～200kg/m3, comprcssive strength is more than 3MPa, heat conduction system
Several 0.020～0.048w/m K, fire-protection rating is A1 level；The magnesium oxysulfide concrete foamed bricks density of the present invention is low, and intensity is high, heat
Conductance is low, high insulating effect, and high temperature does not play end, not efflorescence.
The invention still further relates to the preparation method of this magnesium oxysulfide concrete foamed bricks, comprise the following steps:
Weigh raw material in proportion, magnesium sulfate, magnesium oxide, additive and water are mixed and stirred for, add filler and continue stirring
Obtain cement grout, in cement grout, pour hydrogen peroxide stirring into, pour mould into, stand, natural curing 15 minutes, the demoulding, cut
Cut, maintenance 3～7 days, obtain magnesium oxysulfide foamed bricks.
Concrete: stir 5～10Min after magnesium sulfate, magnesium oxide, additive and water being mixed；Pour into rapidly in serosity
The mixing speed of hydrogen peroxide is 300～500 turns.Mixing time 20s～60s.
In the examples below, the raw material of use:
Light calcined magnesia；
MgSO4Containing water of crystallization, H2O:MgSO4Ratio is 7:1；
Acid flyash (AFA), from Xiang Kuang power plant, Shanxi (containing main component: 50wt%SiO2, 25wt%
Al2O3, 9wt%CaO)；
Slag micropowder, particle diameter is 300～500 mesh.
It should be mentioned that the purity of spendable raw material is not most important.It is suitable and cheap that many outsourcing materials can be used as
Raw material.
Embodiment 1
The present embodiment is with flyash as aglite, and the proportioning of each raw material is as shown in table 1-1,1-2:
Table 1-1: proportioning raw materials
| Raw material | Weight portion (kg) |
| MgO | 300 |
| MgSO4 | 300 |
| H2O | 300 |
| Flyash | 400 |
| Hydrogen peroxide | 60 |
According to 1000 parts of above-mentioned magnesium oxysulfide concretes add the additive of weight portion as shown in table 1-2.
Table 1-2:
Preparation method step is as follows:
Weigh each raw material by the mass fraction in table 1, magnesium sulfate be dissolved in water, add various additive and stir,
Add magnesium oxide, stir 5Min, flyash is poured into continuation stirring and obtains uniform cement grout, pour into rapidly double in serosity
Oxygen water Quick uniform stirring 20s, pour mould into, stand, natural curing 15 minutes, the demoulding, cutting, and maintenance 3～7 days obtain
The magnesium oxysulfide foamed bricks of low-density and high-strength, the performance of foamed bricks is as shown in table 2.
Table 2: foamed bricks performance
| W.A. (%) | 7.2 |
| D(kg/m3) | 152 |
| CS(MPa) | 3.25 |
| MOR(MPa) | 3.15 |
| Λ(W/m·K) | 0.030 |
| Fire-protection rating | A1 level |
Wherein, W.A. water absorption rate；D dry density；CS comprcssive strength；MOR bending strength；Λ heat conduction system
Number.
Embodiment 2
The present embodiment is with slag micropowder as aglite, and the proportioning of each raw material is as shown in table 3-1,3-2:
Table 3-1: proportioning raw materials
| Raw material | Weight portion (kg) |
| MgO | 300 |
| MgSO4 | 300 |
| H2O | 330 |
| Slag micropowder | 400 |
| Hydrogen peroxide | 60 |
According to 1000 parts of above-mentioned magnesium oxysulfide concretes add the additive of weight portion as shown in table 3-2.
Table 3-2:
| Additive | Weight portion (kg) |
| WJ-A: phosphoric acid | 5 |
| WJ-B: sodium lignin sulfonate | 5 |
| WJ-C: sodium sulfate | 10 |
| WJ-D: Mel | 5 |
| WJ-E: acrylamide | 10 |
| WJ-G: hydroxypropyl methyl is fine Dimension element | 2 |
| WJ-H: siloxanes | 2 |
Preparation method step is as follows:
Weigh each raw material by the mass fraction in table 3, magnesium sulfate be dissolved in water, add various additive and stir,
Add magnesium oxide, stir 5Min, slag micropowder is poured into continuation stirring and obtains uniform cement grout, pour into rapidly in serosity
Hydrogen peroxide Quick uniform stirring 20s, pour mould into, stand, natural curing 15 minutes, the demoulding, cutting, maintenance 3～7 days,
To the magnesium oxysulfide foamed bricks of low-density and high-strength, the performance of foamed bricks is as shown in table 4.
Table 4: foamed bricks performance
| W.A. (%) | 6.5 |
| D(kg/m3) | 158 |
| CS(MPa) | 3.96 |
| MOR(MPa) | 3.65 |
| Λ(W/m·K) | 0.030 |
| Fire-protection rating | A1 level |
Wherein, W.A. water absorption rate；D density；CS comprcssive strength；MOR bending strength；Λ heat conductivity.
The performance everyway of the foamed bricks that use slag micropowder prepares is than using flyash as aglite system
The standby foaming obtained turns function admirable, but the two is at 150kg/m3Unit weight in the case of comprcssive strength be all higher than 3MPa.
Embodiment 3～7
With slag micropowder as aglite, the proportioning of each raw material is as shown in table 5-1,5-2:
Table 5-1: proportioning raw materials
| Raw material | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 |
| MgO | 240 | 360 | 420 | 450 | 480 |
| MgSO4 | 300 | 300 | 300 | 300 | 300 |
| H2O | 240 | 360 | 400 | 450 | 600 |
| Hydrogen peroxide | 30 | 120 | 75 | 60 | 80 |
| Aggregate | 300 | 400 | 900 | 1200 | 150 |
According to 1000 parts of above-mentioned magnesium oxysulfide concretes add the additive of weight portion as shown in table 5-2.
Table 5-2: ratio of additive
The performance parameter of the foamed bricks that embodiment 3～7 prepares is close with embodiment 2.
Comparative example 1～5
With slag micropowder as aglite, the proportioning raw materials of comparative example 1～5 is as shown in table 6-1,6-2:
Table 6-1:
| Raw material | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| MgO | 500 | 600 | 200 | 140 | 120 |
| MgSO4 | 300 | 300 | 300 | 300 | 300 |
| H2O | 700 | 800 | 300 | 450 | 600 |
| Aggregate | 400 | 400 | 900 | 1200 | 150 |
| Hydrogen peroxide | 60 | 60 | 60 | 60 | 60 |
According to 1000 parts of above-mentioned magnesium oxysulfide concretes add the additive of weight portion as shown in table 6-2.
Table 6-2:
| Raw material | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| WJ-A: salicylic acid | 5 | 5 | 5 | 5 | 5 |
| WJ-B: melmac | 5 | 5 | 5 | 5 | 5 |
| WJ-C: Calcium hyposulfite | 10 | 10 | 10 | 10 | 10 |
| WJ-D: wood calcium | 5 | 5 | 5 | 5 | 5 |
| WJ-E: polyacrylonitrile | 10 | 10 | 10 | 10 | 10 |
| WJ-G: lignin | 2 | 2 | 2 | 2 | 2 |
| WJ-H: silane | 2 | 2 | 2 | 2 | 2 |
The performance of the foamed bricks prepared is as shown in table 7.
Table 7: foamed bricks performance
| Performance | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| W.A. (%) | 6.1 | 6.2 | 5.8 | 5.6 | 5.7 |
| D(kg/m3) | 268 | 268 | 268 | 268 | 268 |
| CS(MPa) | 3.43 | 3.6 | 1.2 | 0.9 | 0.7 |
| MOR(MPa) | 2.45 | 3.42 | 1.32 | 0.87 | 0.61 |
| Λ(W/m·K) | 0.068 | 0.062 | 0.052 | 0.049 | 0.046 |
| Fire-protection rating | A1 | A1 | A1 | A1 | A1 |
Wherein, W.A. water absorption rate；D density；CS comprcssive strength；MOR bending strength；Λ heat conductivity.
Comparative example 6
Prepare foamed bricks according to the formula in embodiment 1 and preparation method, only change the adding proportion of additive, its China and foreign countries
Add agent F selected from rosin acid；Concrete as shown in table 8:
Table 8: additive formula
Preparation method is with embodiment 1, and the parameter preparing product is as shown in table 9.
Table 9: the performance of foamed bricks
| W.A. (%) | D(kg/m3) | CS(MPa) | MOR(MPa) | Λ(W/m·K) | |
| Comparative example 6 | 7.6 | 260 | 3.65 | 2.78 | 0.069 |
| Comparative example 7 | 7.5 | 260 | 3.63 | 2.69 | 0.063 |
| Comparative example 8 | 7.4 | 260 | 2.96 | 2.28 | 0.061 |
| Comparative example 9 | 7.6 | 260 | 2.65 | 1.96 | 0.056 |
| Comparative example 10 | 7.1 | 260 | 2.41 | 1.87 | 0.052 |
| Comparative example 11 | 7.4 | 260 | 2.21 | 1.64 | 0.050 |
| Comparative example 12 | 7.5 | 260 | 1.98 | 1.42 | 0.051 |
| Comparative example 13 | 7.6 | 260 | 1.75 | 1.31 | 0.049 |
| Comparative example 14 | 7.9 | 260 | 1.68 | 1.24 | 0.047 |
| Comparative example 15 | 7.6 | 260 | 1.59 | 1.08 | 0.052 |
| Comparative example 16 | 7.8 | 260 | 1.50 | 1.26 | 0.048 |
Wherein, W.A. water absorption rate；D density；CS comprcssive strength；MOR bending strength；Λ heat conductivity.
Although the application is open as above with preferred embodiment, but is not for limiting claim, any this area skill
Art personnel, on the premise of conceiving without departing from the application, can make some possible variations and amendment, therefore the application
Protection domain should be defined in the range of standard with the application claim.
Claims (9)
1. a magnesium oxysulfide concrete foamed bricks, it is characterised in that described magnesium oxysulfide concrete foamed bricks is prepared by magnesium oxysulfide concrete, institute
State in the raw material of magnesium oxysulfide concrete and contain: magnesium sulfate 100 weight portion, magnesium oxide 50～200 weight portion, filler 0～500 weight
Part, water 30～350 weight portion, foaming agent 8～50 weight portion；
It is preferably: magnesium sulfate 100 weight portion, magnesium oxide 50～162 weight portion, filler 50～400 weight portion, water 30～300 weight
Amount part, foaming agent 10～40 parts；
More preferably: magnesium sulfate 100 weight portion, magnesium oxide 80～120 weight portion, filler 50～200 weight portion, water 80～120
Weight portion, foaming agent 15～25 parts；
Possibly together with additive in described magnesium oxysulfide concrete, the addition of described additive is the 0.1 of described magnesium oxysulfide concrete weight
～5%.
Magnesium oxysulfide concrete foamed bricks the most according to claim 1, it is characterised in that described magnesium sulfate is selected from containing 1～12
At least one in the magnesium sulfate of individual water of crystallization.
Magnesium oxysulfide concrete foamed bricks the most according to claim 1, it is characterised in that described magnesium oxide is light-burned selected from magnesite
At least one in powder, dolomite light burnt powder, analytical pure magnesium oxide；Preferably, described magnesite light burnt powder and described dolomite
In light burnt powder, the content of magnesium oxide is 65～85%.
Magnesium oxysulfide concrete foamed bricks the most according to claim 1, it is characterised in that described filler is selected from aglite, excellent
Electing at least one in flyash, slag micropowder, silicon ash, wood flour, Gypsum Fibrosum powder, dolomite dust, shale powder as, the particle diameter of filler is
300 mesh～800 mesh.
Magnesium oxysulfide concrete foamed bricks the most according to claim 1, it is characterised in that described additive is selected from additive A, outer
Add at least one in agent B, additive C, additive D, additive E, additive F, additive G, additive H；
Described additive A is selected from carboxylic acid or its salt, the anhydride of carboxylic acid or its salt, dicarboxylic acids or its salt, sulfonic acid, the anhydride of sulfonic acid
Or at least one in the anhydride of its salt, phosphonic acids, phosphonic acids or its salt, phosphoric acid or its salt, boric acid, Borax, sodium silicate；
Described carboxylic acid represents with R-COOH, and described sulfonic acid is with R-SO3H represents, described dicarboxylic acids represents with HOOC-R-R-COOH,
Described phosphonic acids is with RP (O) (OH)2Or R2P (O) OH represents；R is selected from substituted or unsubstituted C1-15Alkyl, substituent group is selected from containing
The group of oxygen, nitrogen, phosphorus or sulphur atom；
Preferably, described additive A is selected from oxalic acid, phosphoric acid, dihydric phosphate, disodium-hydrogen, tertiary sodium phosphate, hexa metaphosphoric acid
Sodium, formic acid, formates, tartaric acid, tartrate, lactic acid, aminoacid, salicylic acid, sulfosalicylic acid, malonic acid, succinic acid, sugarcane
At least one in sugar, glucose, sodium gluconate, sodium acetate；
Described additive B is selected from Lignins water reducer, LOMAR PWA EINECS 246-676-2 based water reducer, water-soluble resin water reducer or polycarboxylic acids diminishing
At least one in agent；Described Lignins water reducer is in calcium lignosulfonate, sodium lignin sulfonate, magnesium lignosulfonate
At least one；Described water-soluble resin water reducer is selected from melmac, coumarone resin；
Described additive C is selected from chloride salt early strength agent, Sulfates early strength agent or organic amine early strength agent selected from early strength agent；Described
At least one in calcium chloride, potassium chloride, aluminum chloride or ferric chloride of chloride salt early strength agent, preferably calcium chloride；Described
At least one in sodium sulfate, Calcium hyposulfite, aluminum sulfate or aluminium potassium sulfate of Sulfates early strength agent, preferably sulphuric acid
Sodium；Described organic amine early strength agent is selected from triethanolamine or triisopropanolamine, preferably triethanolamine；
Described additive D is selected from saccharide retarder or lignin sulfonate retarder, is preferably wood calcium and molasses, more elects as
Mel；
Described additive E is selected from polymer, polymer monomer, albumen, polypeptide, starch or anion surfactant at least
A kind of；Polymer is selected from polyvinyl alcohol, polypropylene, polyacrylonitrile, lignin, hydroxypropyl methyl cellulose；Polymer monomer selects
From acrylamide, acrylic acid methyl ester., methyl methacrylate, vinyl alcohol, vinyl acetate, acrylonitrile, styrene, butadiene,
Isoprene or propylene；Anion surfactant is selected from sodium lauryl sulphate, polyoxyethylenated alcohol sodium sulfate, α-alkene
Base sodium sulfonate；
Described additive F selected from soluble resin hydrochlorate, Wen Shaer resin, saponification tell your oil, dodecyl sodium sulfate, 12
Sodium alkyl benzene sulfonate, sulfonated petroleum hydroxyl class soluble-salt at least one；
Described additive G is selected from silane or siloxanes；
Described additive H is in polypropylene fibre, polyacrylonitrile fibre, lignin fibre or hydroxypropyl methyl cellulose fiber
At least one.
Magnesium oxysulfide concrete foamed bricks the most according to claim 5, it is characterised in that
The addition of described additive A is the 0.1～0.8% of described magnesium oxysulfide concrete weight, preferably 0.4～0.5%；
The addition of described additive B is the 0.1～0.8% of described magnesium oxysulfide concrete weight, preferably 0.2～0.5%；
The addition of described additive C is the 0.1～1.2% of described magnesium oxysulfide concrete weight, preferably 0.4～1%；
The addition of described additive D is the 0.1～1.0% of described magnesium oxysulfide concrete weight, preferably 0.2～0.5%；
The addition of described additive E is the 0.2～1.2% of described magnesium oxysulfide concrete weight, preferably 0.4～1.0%；
The addition of described additive G is the 0.05～0.2% of described magnesium oxysulfide concrete weight, preferably 0.1～0.2%.
The addition of described additive H is the 1.5～3% of described magnesium oxysulfide concrete weight, preferably 1.6～2.5%.
Magnesium oxysulfide concrete foamed bricks the most according to claim 1, it is characterised in that foaming agent is selected from hydrogen peroxide, carbonic acid
At least one in hydrogen sodium, ammonium carbonate, azodicarbonamide or azodiisobutyronitrile, preferably hydrogen peroxide.
Magnesium oxysulfide concrete foamed bricks the most according to claim 1, it is characterised in that described magnesium oxysulfide concrete foamed bricks close
Degree is 100～200kg/m3, comprcssive strength 3～5MPa, heat conductivity 0.020～0.048w/m K, fire-protection rating is A1 level.
9. the preparation method of magnesium oxysulfide concrete foamed bricks as claimed in claim 1, it is characterised in that described preparation method includes
Following steps:
Weigh raw material in proportion, magnesium sulfate, magnesium oxide, additive and water are mixed and stirred for, add filler continuation stirring and obtain
Cement grout, pours hydrogen peroxide stirring in cement grout into, pours mould into, stand, natural curing 15 minutes, the demoulding, and cutting is supported
Protect 3～7 days, obtain magnesium oxysulfide foamed bricks.
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Address after: Room 17, room 100176, building 3, No. 10, Ronghua Road, Beijing Economic & Technological Development Zone, Beijing, China Applicant after: MICROTEK environmental Polytron Technologies Inc Address before: Room 17, room 100176, building 3, No. 10, Ronghua Road, Beijing Economic & Technological Development Zone, Beijing, China Applicant before: BEIJING ZHONGJING JIAMEI ENVIRONMENT SCIENCE & TECHNOLOGY CO., LTD. |
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