CN101891499A - Method for producing autoclaved aerated concrete from double siliceous raw materials - Google Patents
Method for producing autoclaved aerated concrete from double siliceous raw materials Download PDFInfo
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- CN101891499A CN101891499A CN2010102351930A CN201010235193A CN101891499A CN 101891499 A CN101891499 A CN 101891499A CN 2010102351930 A CN2010102351930 A CN 2010102351930A CN 201010235193 A CN201010235193 A CN 201010235193A CN 101891499 A CN101891499 A CN 101891499A
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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
- C04B28/18—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 mixtures of the silica-lime type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a method for producing autoclaved aerated concrete from double siliceous raw materials. The autoclaved aerated concrete is mainly prepared by taking two siliceous raw materials of quartz sand and fly ash, cement, quick lime and gypsum powder as main raw materials, doping with aluminum powder paste serving as foaming agent, and preparing the autoclaved aerated concrete according to the conventional autoclaved aerated concrete process. The autoclaved aerated concrete is prepared from the following components by weight percent: 30%-36% of the quartz sand, 32%-38% of the fly ash, 7%-13% of the cement, 16%-22% of the quick lime and 2%-4% of the gypsum powder as well as the aluminum powder paste with the doping amount of 0.05-0.07%, wherein the ratio between water and the materials is 0.5-0.55. By using the two siliceous raw materials of the quartz sand and the fly ash as aggregates for preparing the autoclaved aerated concrete, the invention can greatly improve the quality of the autoclaved aerated concrete product and reduce the production cost thereof at the same time, thus effectively controlling the cost.
Description
Technical field
The present invention relates to a kind of production technique of steam-pressing aero-concrete, the production method that particularly two siliceous starting material are produced steam-pressing aero-concrete.
Background technology
Steam-pressing aero-concrete is to be main raw material with siliceous material (sand, flyash and contain silicon tailings etc.) and calcareous material (lime, cement), admixture foaming agent (aluminium powder), stir through adding water, form the space by chemical reaction, the how empty silicate product of making by technological processs such as casting, precuring cutting, steam press maintenances.Its main chemical reactions principle is: XCaO+YSiO
2+ ZH
2O → XCaOYSiO
2ZH
2O (C-S-H); CaO+H
2O+Al → Ca (OH)
2+ Al (OH)
3+ H
2At present, the production technique of domestic steam-pressing aero-concrete mainly contains following three kinds: first kind, adopting unslaked lime+cement (agglutinate) and quartz sand (aggregate) is main raw material, with sand and pigment mill; Second kind, adopting cement (agglutinate) and quartz sand (aggregate) is main raw material, with sand and pigment mill; The third, adopting unslaked lime+cement (agglutinate) and flyash (aggregate) is main raw material.Wherein first, second kind technology causes production cost higher (higher by 10%～30% than the third technology) because quartz sand needs grinding; And the problem that the third technology exists is main component SiO in the flyash
2Content is low, and unstable, causes the physical property (frost resistance, drying shrinkage value) of product poor, ultimate compression strength low (can only produce salable product, can't produce premium grads), and unstable.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of production method of two siliceous starting material production steam-pressing aero-concretes, this method can improve quality, the reduction steam-pressing aero-concrete production cost of products of steam-pressing aero-concrete product, thereby overcomes the deficiencies in the prior art.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: two siliceous starting material are produced the production method of steam-pressing aero-concrete.This method is to be main raw material with quartz sand and two kinds of siliceous materials of flyash and cement, unslaked lime, terra alba, admixture aluminium powder cream foaming agent, and steam-pressing aero-concrete preparation technology makes steam-pressing aero-concrete routinely; The weight percent of each raw material is: quartz sand: flyash: cement: unslaked lime: terra alba=30～36%:32～38%:7～13%:16～22%:2～4%; Aluminium powder cream volume: 0.5～0.7 ‰, ratio of water to material: 0.5～0.55.
Above-mentioned two siliceous starting material are produced the production method of steam-pressing aero-concrete, and the weight percent of each raw material the best is: quartz sand: flyash: cement: unslaked lime: terra alba=33%:35%:10%:19%:3%; Aluminium powder cream volume: 0.7 ‰, ratio of water to material: 0.55.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, SiO in two kinds of siliceous materials of described quartz sand and flyash
2The composition total content is between 60～70%.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, described quartz sand should meet JC/T622-1996 " silicate building products sand " standard, its SiO
2〉=80%, K
2O+NaO≤5%, organism: qualified, mica≤1%, SO
3≤ 2%, mud≤8%, inclusion: do not have.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, described flyash is answered conformance with standard: GB 1596-91, screen over-size fineness≤28% of its 0.08mm sieve aperture, loss on ignition≤12%, silicon-dioxide 〉=40%, aluminium sesquioxide 〉=35%, sulphur trioxide≤2%, calcium oxide≤10%.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, described unslaked lime should meet the requirement of acceptable end product in JC/T621-1996 " silicate building products unslaked lime " standard; Effective GaO+MgO 〉=75%, magnesium oxide≤5%, silicon-dioxide≤5%, carbonic acid gas≤5%, middling speed is cleared up digestion rate≤15min, digestion temperature 〉=60 ℃, 0.088mm square hole sieve screen over-size fineness≤15%.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, described cement should meet the specification of quality of C32.5 level ordinary Portland cement in GB175-2000 " silicate cement, the ordinary Portland cement " standard.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, described terra alba should meet GB/T5483-1996 " gypsum " standard, CaSO
42H
2O 〉=75%, 0.08mm square hole sieve screen over-size fineness≤15%.
The production method that aforesaid two siliceous starting material are produced steam-pressing aero-concrete, described aluminium powder cream should meet JC/T407-2000 " gas concrete aluminium powder cream " standard; Active aluminium content 〉=85%, solids constituent 〉=75%, 16min rate of gas generation 〉=90%, 30min rate of gas generation 〉=99%, 0.075mm sieve screen over-size fineness≤3%, water dispersible: do not have granule, lid water area: 4000～6000cm
2/ g.
Principle of the present invention: according to physical chemistry of silicate reaction CaO/SiO
2The principle of=0.8 optimum adopts flyash as CaO/SiO in the production method of siliceous material
2Less than normal, cause the high-alkali CSH of resultant of reaction on the low side, aggregate reaction is too much, so product strength is lower.And adopt quartz sand proper as the production method of siliceous material, but α in the sand-quartz content height causes intensity not high with calcareous material hydration reaction ability or the like factor.The present invention determines to increase a certain amount of high content silicon material (quartz sand) according to the quality of flyash in the feedstock production process, uses flyash and quartz sand to produce the steam-pressing aero-concrete product as aggregate simultaneously, has made full use of SiO in the flyash
2Activity, the aggregate effect of quartz sand is manifested, so the product fine that the present invention adopts the more single silicon materials of physical property of the product that two silicon materials produce to produce, production cost is also lower.
1, intensity contrast: (table 1) (is example with B07 level product)
The product strength contrast that the two siliceous materials of the single siliceous material of table 1 and the present invention are produced
Be the requirement that the product of raw material can't reach premium grads as can be seen from Table 1 with flyash, but siliceous with two kinds of flyash and quartz sands be that the product strength of raw material is best.
2, production cost:
The present invention adopts the production cost of two siliceous materials (flyash and quartz sand) between two kinds of single production costs with certain siliceous material (flyash or quartz sand), hangs down 10% approximately than single individual event production cost with quartz sand.After our company adopts the present invention to undergo technological transformation not only steady quality reach the premium grads level, cost also is effectively controlled.Specifically see Table 2:
Before transforming, table 2 contrasts with improved cost
Proportioning raw materials design of the present invention: according to raw material (SiO in flyash and the quartz sand
2) composition detection result, adjust SiO in the siliceous material
2The composition total content calculates and can draw flyash (SiO between 60～70%
2%=40%～45%) with quartz sand (SiO
2%=85%～95%) usage ratio is in 1 ± 0.1:1 ± 0.1.Quartz sand: flyash: cement: unslaked lime: terra alba=33:35:10:19:3, aluminium powder cream volume: 0.7 ‰, ratio of water to material: 0.55.Above proportioning is only used for calculating the material balance table, and the actual production prescription also needs to adjust according to on-the-spot starting material situation.
Table 3 material balance table is (with 640kg/m
3The unit weight meter)
| Sequence number | Material name | Unit | Hour consumption |
| 1 | Sand | t | 10.25 |
| 2 | Flyash | t | 10.88 |
| 3 | Unslaked lime | t | 6.84 |
| 4 | Cement | t | 2.49 |
| 5 | Gypsum | t | 0.62 |
| 6 | Aluminium powder cream | kg | 0.022 |
Consumption has comprised the starting material loss in the table.
Beneficial effect of the present invention: compared with prior art, the present invention adopts quartz sand and two kinds of siliceous materials of flyash to produce steam-pressing aero-concrete as aggregate, improved the quality (comprising visual appearance and intensity) of steam-pressing aero-concrete product greatly, the constant product quality of producing, reach the premium grads level, reduced the steam-pressing aero-concrete production cost of products simultaneously, cost is effectively controlled.
Description of drawings
Fig. 1 is technological process of production figure of the present invention.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Embodiment
Embodiment 1.Two siliceous starting material are produced the production method of steam-pressing aero-concrete.With quartz sand and two kinds of siliceous materials of flyash and cement, unslaked lime, terra alba is main raw material, admixture aluminium powder cream foaming agent, and steam-pressing aero-concrete preparation technology makes steam-pressing aero-concrete routinely; The weight percent of each raw material is: quartz sand: flyash: cement: unslaked lime: terra alba=33%:35%:10%:19%:3%; Aluminium powder cream volume: 0.7 ‰, ratio of water to material: 0.55.Ratio of water to material wherein is meant that amount of water accounts for the ratio of powder.SiO in two kinds of siliceous materials of quartz sand and flyash in the raw material
2The composition total content is between 60～70%.Quartz sand meets JC/T622-1996 " silicate building products sand " standard, its SiO
2〉=80%, K
2O+NaO≤5%, organism: qualified, mica≤1%, SO
3≤ 2%, mud≤8%, inclusion: do not have.Flyash conformance with standard: GB 1596-91, the screen over-size fineness of its 0.08mm sieve aperture≤28 %, loss on ignition≤12%, silicon-dioxide 〉=40%, aluminium sesquioxide 〉=35%, sulphur trioxide≤2%, calcium oxide≤10%.Unslaked lime meets the requirement of acceptable end product in JC/T621-1996 " silicate building products unslaked lime " standard; Effective GaO+MgO 〉=75%, magnesium oxide≤5%, silicon-dioxide≤5%, carbonic acid gas≤5%, middling speed is cleared up digestion rate≤15 min, digestion temperature 〉=60 ℃, 0.088mm square hole sieve screen over-size fineness≤15%.Cement meets the specification of quality of C32.5 level ordinary Portland cement in GB175-2000 " silicate cement, the ordinary Portland cement " standard.Terra alba meets GB/T5483-1996 " gypsum " standard, CaSO
42H
2O 〉=75%, 0.088mm square hole sieve screen over-size fineness≤15%.Aluminium powder cream meets JC/T407-2000 " gas concrete aluminium powder cream " standard; Active aluminium content 〉=85%, solids constituent 〉=75%, 16 min rate of gas generation 〉=90%, 30min rate of gas generation 〉=99%, 0.075mm sieve screen over-size fineness≤3%, water dispersible: do not have granule, lid water area: 4000～6000 cm
2/ g.
Main process equipment of the present invention adopts the convertible loop wheel machine of 5.0 * 1.2 * 0.6m, multiple step format cutting machine.Base substrate cutting back size: 5.0 * 1.2 * 0.60m, the cutting cycle :≤6min/ mould.The following (see figure 1) of its technological process of production:
Raw material and preparation: unslaked lime and gypsum enter unslaked lime storehouse, gypsum storehouse respectively after going into factory's fragmentation by wagon tremie, enter the common mix grinding of ball mill through the blanking by a certain percentage of speed-governing belt scale respectively then, deliver to after levigate store in the blending bun on the proportioning building stand-by.Gypsum has the grinding aid effect to unslaked lime in the mix grinding process, and phenomenon occurs to prevent lime from " to stick with paste mill ".Quartz sand is delivered to Sha Duipeng by automobile, adopts the constant speed weighing belt to enter ball mill by certain feeding capacity and adds water mix grinding pulping process, makes the slip of proper concn through grinding machine, goes into basin and stores.Cement is sent into cement silo by tank car in bulk, then stored for future use in chapelet is promoted to the cement intermediate bin of proportioning building top layer respectively.
Ingredient station: materials such as agglutinate, mortar, slug, cement measure the back respectively and stirred 150 seconds with certain reinforced entering smoothly in the stirrer by certain proportioning, add aluminium powder cream at last and stir cast at once after 40 seconds.For guaranteeing teeming temperature, cast stirrer domestic demand feeds a certain amount of steam to improve slurry temperature.Precuring, cutting workshop section: base substrate is through the cast back hot cell precuring of cast stirrer, treats that it reaches the demoulding after the cutting intensity, and base substrate enters autoclave after cutting in length and breadth steam-cured.The waste material that cutting produces is delivered in the useless slurry jar of proportioning building and is recycled and reused for production after slurrying.
Steam and press workshop section: base substrate adopts 1.2MPa steam to carry out steam press maintenance by steam curing system after entering autoclave, and in about 12 hours of steam press maintenance cycle, this workshop section establishes thermal control chamber, to guarantee to steam the strictness execution and the production safety of compacting degree.Steam pressure and finish, final product is handled the back packing by a minute buttress loop wheel machine, glass severing machine, is transported to the airport classify and pile up by fork truck, and template is through loop wheel machine. and tractor sends back to the matched moulds station.
Embodiments of the present invention are not limited to the foregoing description, and the various variations of making under the prerequisite that does not break away from aim of the present invention all belong within protection scope of the present invention.
Claims (9)
1. production method that two siliceous starting material are produced steam-pressing aero-concretes, it is characterized in that: it is to be main raw material with quartz sand and two kinds of siliceous materials of flyash and cement, unslaked lime, terra alba, admixture aluminium powder cream foaming agent, steam-pressing aero-concrete preparation technology makes steam-pressing aero-concrete routinely; The weight percent of each raw material is: quartz sand: flyash: cement: unslaked lime: terra alba=30～36%:32～38%:7～13%:16～22%:2～4%; Aluminium powder cream volume: 0.5～0.7 ‰, ratio of water to material: 0.5～0.55.
2. the production method that two siliceous starting material according to claim 1 are produced steam-pressing aero-concrete, it is characterized in that: the weight percent of each raw material is: quartz sand: flyash: cement: unslaked lime: terra alba=33%:35%:10%:19%:3%; Aluminium powder cream volume: 0.7 ‰, ratio of water to material: 0.55.
3. the production method that two siliceous starting material according to claim 1 and 2 are produced steam-pressing aero-concrete is characterized in that: SiO in two kinds of siliceous materials of described quartz sand and flyash
2The composition total content is between 60～70%.
4. the production method that two siliceous starting material according to claim 1 and 2 are produced steam-pressing aero-concrete, it is characterized in that: described quartz sand should meet JC/T622-1996 " silicate building products sand " standard, its SiO
2〉=80%, K
2O+NaO≤5%, organism: qualified, mica≤1%, SO
3≤ 2%, mud≤8%, inclusion: do not have.
5. the sharp production method that requires 1 or 2 described two siliceous starting material to produce steam-pressing aero-concrete, it is characterized in that: described flyash is answered conformance with standard: GB 1596-91, screen over-size fineness≤28% of its 0.08mm sieve aperture, loss on ignition≤12%, silicon-dioxide 〉=40%, aluminium sesquioxide 〉=35%, sulphur trioxide≤2%, calcium oxide≤10%.
6. the sharp production method that requires 1 or 2 described two siliceous starting material to produce steam-pressing aero-concrete, it is characterized in that: described unslaked lime should meet the requirement of acceptable end product in JC/T621-1996 " silicate building products unslaked lime " standard; Effective GaO+MgO 〉=75%, magnesium oxide≤5%, silicon-dioxide≤5%, carbonic acid gas≤5%, middling speed is cleared up digestion rate≤15 min, digestion temperature 〉=60 ℃, 0.088mm square hole sieve screen over-size fineness≤15%.
7. the sharp production method that requires 1 or 2 described two siliceous starting material to produce steam-pressing aero-concrete, it is characterized in that: described cement should meet the specification of quality of C32.5 level ordinary Portland cement in GB175-2000 " silicate cement, the ordinary Portland cement " standard.
8. the sharp production method that requires 1 or 2 described two siliceous starting material to produce steam-pressing aero-concrete, it is characterized in that: described terra alba should meet GB/T5483-1996 " gypsum " standard, CaSO
42H
2O 〉=75%, 0.088mm square hole sieve screen over-size fineness≤15%.
9. the sharp production method that requires 1 or 2 described two siliceous starting material to produce steam-pressing aero-concrete, it is characterized in that: described aluminium powder cream should meet JC/T407-2000 " gas concrete aluminium powder cream " standard; Active aluminium content 〉=85%, solids constituent 〉=75%, 16 min rate of gas generation 〉=90%, 30min rate of gas generation 〉=99%, 0.075mm sieve screen over-size fineness≤3%, water dispersible: do not have granule, lid water area: 4000～6000cm
2/ g.
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Application publication date: 20101124 |