CN102206095A - Aerated concrete building block and preparation technology thereof - Google Patents
Aerated concrete building block and preparation technology thereof Download PDFInfo
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- CN102206095A CN102206095A CN2011100912085A CN201110091208A CN102206095A CN 102206095 A CN102206095 A CN 102206095A CN 2011100912085 A CN2011100912085 A CN 2011100912085A CN 201110091208 A CN201110091208 A CN 201110091208A CN 102206095 A CN102206095 A CN 102206095A
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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
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses an aerated concrete building block. The aerated concrete building block comprises, by weight, 65-72 parts of fly ash, 15-20 parts of quick lime, 5-10 parts of cement, 2.83-3.83 parts of phosphogypsum, 0.1 parts of aluminum powers, 0.05 parts of a foam stabilizer and 0.02 parts of a polypropylene fibre. The modified polypropylene fiber is added to the concrete structure material, such that tensile strength and anti-impact strength of the concrete structure material are improved, a drying shrinkage value of the concrete structure material is reduced, and cracks are prevented from formation and extension during cement solidification. During a green body structural strength formation, a plurality of microcracks are generated due to a plastic shrinkage of the green body, such that during a later autoclaved process, larger cracks are easily generated from the microcracks when the aerated concrete structure extends; meanwhile, because a gradient variation of humidity of the aerated concrete material is large, cracks in the aerated concrete material are easily generated during humidity changing. Therefore, the internal structure of the aerated concrete provided by the present invention can enable improving the disadvantages of generation of aerated concrete wall cracks through an enhancement of the polypropylene fibre.
Description
Technical field
The present invention relates to the preparation technology of a kind of air-entrained concrete building block and air-entrained concrete building block.
Background technology
China is populous, a energy and soil country in short supply.Ruin the field in a large number based on the traditional building material of sintering solid clay brick and fetch earth, waste land resources, contaminate environment.Therefore, banning use of solid clay brick in city-building is the very important decision that country implements the strategy of sustainable development.Press State owned land conservation of resources policy; implement General Office of the State Council's " about innovation of further propelling materials for wall and promote the notice of energy saving building " (Office of the State Council is sent out [2005] No. 33) spirit, National Development and Reform Commission, Ministry of Land and Resources, the Ministry of Construction, the Ministry of Agriculture dispatch a joint document " about announcing second batch of notice that bans use of solid clay brick to claim the city list in limited time " (send out and change No. [2005] 2656, ring money).Country is in the regulation of " progressively banning use of solid clay brick in the dwelling construction in limited time ".
Along with the development of urban construction, the progressively formation of modernization of the housing industry, also more and more high to the quality and the functional requirement of materials for wall.Though existing on the market at present all kinds of holllow building blocks, new wall materials such as light wall board all are limited to the factors such as technology, equipment of product itself, have all drawbacks and inborn defective.Urban construction, particularly middle and high layer building is badly in need of a large amount of higher-grades, high quality, multi-functional high-quality new wall material.
Novel wall material gas concrete is as New Building Materials a kind of less energy-consumption, environment-friendly type, the policy requirements that meets very much country, but, usually bring masty construction work common faults such as wall crazing and be applied to actual engineering because common gas concrete has the problem that drying shrinkage value is big, intensity is low.For solving the big problem of drying shrinkage value of gas concrete, people have done a lot of effort, comprise changing its raw-material proportioning, use methods such as admixture, though these methods have certain effect, its limitation are arranged all.
Summary of the invention
The technical problem that the present invention mainly solves provides a kind of high strength, the air-entrained concrete building block of low shrinkage value, and preparation method thereof.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of air-entrained concrete building block is provided, described air-entrained concrete building block comprises following components in part by weight: flyash 65-72 part, unslaked lime 15-20 part, cement 5-10 part, phosphogypsum 2.83-3.83 part, 0.1 part of aluminium powder, 0.05 part of suds-stabilizing agent, 0.02 part of polypropylene fibre.
Air-entrained concrete building block of the present invention adds tensile strength, the resistance to impact shock that modified polypropylene fiber can improve concrete structure material in concrete structure material, reduce the drying shrinkage value of concrete structure material and prevent advantage such as fissured formation and expansion in the cement solidification process.Similarly, gas concrete is in blank structure intensity forming process, and usually because the plastic shrinkage of base substrate produces many tiny cracks, to such an extent as to steam in the pressure process in the later stage, tiny crack is easier to produce bigger crack in the gas concrete structurally-expanded; The moisture gradient variation is bigger in the gas concrete material simultaneously, the easier generation of internal fissure in the humidity change procedure.Thereby the gas concrete internal structure can effectively be improved the fissured generation of aerated concrete wall by the enhancement of polypropylene fibre.
Wherein, described air-entrained concrete building block comprises following components in part by weight: 68 parts in flyash, 20 parts of unslaked limes, 8 parts of cement, 3.83 parts of phosphogypsums, 0.1 part of aluminium powder, 0.05 part of suds-stabilizing agent, 0.02 part of polypropylene fibre.
For realizing second goal of the invention, this law provides a kind of preparation method of air-entrained concrete building block, may further comprise the steps:
(1), raw material powder coal ash 65-72 part and phosphogypsum 2.83-3.83 part are added water grind and make flyash magma, described flyash magma and unslaked lime 15-20 part in weight part, cement 5-10 part, 0.1 part of aluminium powder, 0.05 part of suds-stabilizing agent, polypropylene fibre mixes for 0.02 part, makes mixed pulp;
(2) the mixed pulp casting that step (1) is obtained, and after 40-60 ℃ of precuring 1.5-2.5 hour, cut into the building block base; In the precuring process, unslaked lime (CaO) generates heat with the water reaction in the magma, when whole base substrate temperature reaches about 75 ℃, activate the aluminium powder foaming in the slurry, form behind the bubble because the suds-stabilizing agent in the slurry is fixed bubble, whole base substrate has just formed a lot of not connected spileholes, and the sound insulation in the polypropylene fibre air-entrained concrete building block just of its spilehole, heat insulation, light-weight physicals embody.
(3) described building block base is obtained the polypropylene fiber concrete building block behind steam press maintenance.
Wherein, step (1) is specially: raw material powder coal ash 65-72 part and phosphogypsum 2.83-3.83 part are added water grind and make flyash magma, order adds unslaked lime 15-20 part, cement 5-10 part, 0.02 part of polypropylene fibre, aerating is stirred temperature of charge is reached about 42 ℃, adds 0.1 part of aluminium powder again, and 0.05 part of thorough mixing of suds-stabilizing agent is prepared into mixed pulp.
Wherein, described flyash magma is identical with the diffusibleness of mixed pulp, is 26-28cm.
The measuring method of described expansion speed degree is as follows: determinand is after stirring 3 minutes, take out little scoop sample product, the hollow that is inverted in high about 10cm, diameter and is 5cm does not have in the end drum, the bottom holds with glass or plastic bottom board, mention rapidly, that measures slip spreads area diameter (being commonly called as " degree of spreading out, diffusibleness ") out on base plate
Wherein, the steam press maintenance of described step (3) comprise vacuumize, boost, constant voltage, step-down, five stages of exhaust:
Described vacuumizing is evacuated to pounds per square inch absolute (psia) 0.06Mpa, and under this pressure vacuum kept 0.5h;
Described boosting rises to pounds per square inch absolute (psia) 1.3Mpa, and the time of the process of boosting is 1.75h;
Described constant voltage keeps pounds per square inch absolute (psia) 1.3Mpa, and constant voltage time length is 8.0h;
Described step-down is reduced to normal pressure by pounds per square inch absolute (psia) 1.3Mpa, and the step-down process time is 1.75h.
Pounds per square inch absolute (psia) (Absolute Pressure) is to make the pressure that starting point calculated with absolute zero-pressure to claim pounds per square inch absolute (psia), and the atmospheric pressure of indication is 01 MPa usually, is exactly atmospheric pounds per square inch absolute (psia).It reflects the actual numerical value of pressure in the equipment.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment is detailed.
Embodiment 1
1, starting material and weight percent, following prescription is chosen any one kind of them:
1. flyash 68kg, unslaked lime 20kg, cement 8kg, phosphogypsum 3.83kg, aluminium powder 0.1kg, suds-stabilizing agent 0.05kg, polypropylene fibre 0.02kg and water are an amount of.
2. flyash 72kg, unslaked lime 15kg, cement 5kg, phosphogypsum 2.83kg, aluminium powder 0.1kg, suds-stabilizing agent 0.05kg, polypropylene fibre 0.02kg and water are an amount of.
3. flyash 65kg, unslaked lime 18kg, cement 10kg, phosphogypsum 2.83kg, aluminium powder 0.1kg, suds-stabilizing agent 0.05kg, polypropylene fibre 0.03kg and water are an amount of.
2, adopt the production method of the air-entrained concrete building block of above-mentioned prescription, the technological process of production of this method is:
(1), feedstock production
A. the preparation of flyash magma
Adopt the technology of flyash and gypsum mixed pulp.During production, flyash and gypsum are made mixed slurry by adding troughing together.When slurrying adds water, quantitatively add water, make the suitable slip of concentration.Pump in the slip storage tank standby by the slag stock pump again.
B. unslaked lime feedstock production
Lump lime is transported into factory with tipper, is discharged in the lime stockpile grid to stack.Lump lime is sent in the lime bin by chapelet behind physical pendulum formula jaw crushing crusher machine.Before the grinding, lime feeds the closed transfer roller by the bottom of the reservior feeding machine and sends into and carry out grinding in the grinding machine.Lime powder after levigate is delivered to bucket elevator by the grinding machine discharge port, delivers in the outstanding filler bin of proportioning building stone standby by bucket elevator.
C. cement
Adopt bulk cement.Bulk cement is transported in the factory by #425 cementing truck in bulk, directly pumps in the proportioning building cement flour feed bin standby.
D. aluminium powder
Buy the barreled aluminium powder by the other places, deposit at the bottom of the proportioning building in the aluminium powder storehouse.Winch to the proportioning building second floor by electric block during use, have suspension standby by stirring into 5% in the input aluminium powder stirrer behind the human metering then.
F. suds-stabilizing agent
Near the suds-stabilizing agent product of the manufacturer production employing company
G. polypropylene fibre
The standard compliant polypropylene fibre material of outsourcing.
(2), batching, stirring, cast
1. lime, cement, polypropylene fibre are sent in the electronics powder weighing balance by storehouse bill kept on file screwed pipe feeding machine, are discharged in the cast stirrer through the dumping device of cummulative metering by weigher.
2. coal ash pulp is put into troughing after by the valve open under the slip storage tank and is pumped into proportioning building slip electronic weighing balance again and carry out cummulative metering, when slip weight reaches batching and requires, closes a jar baiting valve by robot control system(RCS) and closes storage, stops blowing.The slip that measures is put into the cast stirrer by instruction.
3. aluminium powder, suds-stabilizing agent are poured into together in the aluminium powder stirrer and are made suspension by human metering, and the suspension that stirs is directly put into the cast stirrer.Slip temperature before cast should reach 42 ℃.Can lead to steam heating inadequately as temperature.During cast, mould is transported under the cast stirrer in place by ferry bus, the cast of cast stirrer blowing.
(3), cutting, marshalling
After foster Dutch cuts intensity at the beginning of quiet the stopping, turn on the cutting machine stationary bearing by the reversal hanger handling on the car of line of cut upset purlin, the demoulding is stood upside down base substrate.Rip cutting and crosscut are carried out in the cutting unit walking, finish cutting.
The base substrate of well cutting loads work in-process suspender handling on the car of purlin before by still to the still on the steam-cured dolly together with side plate, and per car is stacked two moulds, stacks good steam-cured dolly and is pulled in before the still by slow-motion hoist and organizes into groups on the track.
(4), steam pressure and finished product
The base substrate of finishing group is drawn in by slow-motion hoist and is carried out steam press maintenance in the still, about the steam-cured time 8.0h of constant voltage, and vapor pressure 1.3Mpa, about 190 ℃ of temperature.
Goods are pulled out still by a slow motion formula volume machine behind steam press maintenance, by going out still suspender handling finished product to transport trolley, deposit maintenance to the stockyard 5 days again.
In a preferred embodiment, described flyash magma is identical with the diffusibleness of mixed pulp, is 26-28cm.
In a preferred embodiment, steam press maintenance comprise vacuumize, boost, constant voltage, step-down, five stages of exhaust:
Described vacuumizing is evacuated to pounds per square inch absolute (psia) 0.06Mpa, and under this pressure vacuum kept 0.5h;
Described boosting rises to pounds per square inch absolute (psia) 1.3Mpa, and the time of the process of boosting is 1.75h;
Described constant voltage keeps pounds per square inch absolute (psia) 1.3Mpa, and constant voltage time length is 8.0h;
Described step-down is reduced to normal pressure by pounds per square inch absolute (psia) 1.3Mpa, and the step-down process time is 1.75h.
The above only is embodiments of the invention; be not so limit claim of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification sheets of the present invention to do, or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (6)
1. an air-entrained concrete building block is characterized in that, described air-entrained concrete building block comprises following components in part by weight: flyash 65-72 part, unslaked lime 15-20 part, cement 5-10 part, phosphogypsum 2.83-3.83 part, 0.1 part of aluminium powder, 0.05 part of suds-stabilizing agent, 0.02 part of polypropylene fibre.
2. air-entrained concrete building block according to claim 1, it is characterized in that described air-entrained concrete building block comprises following components in part by weight: 68 parts in flyash, 20 parts of unslaked limes, 8 parts of cement, 3.83 parts of phosphogypsums, 0.1 part of aluminium powder, 0.05 part of suds-stabilizing agent, 0.02 part of polypropylene fibre.
3. the preparation method of an air-entrained concrete building block is characterized in that, may further comprise the steps:
(1), raw material powder coal ash 65-72 part and phosphogypsum 2.83-3.83 part are added water grind and make flyash magma, described flyash magma and unslaked lime 15-20 part in weight part, cement 5-10 part, 0.1 part of aluminium powder, 0.05 part of suds-stabilizing agent, polypropylene fibre mixes for 0.02 part, makes mixed pulp;
(2) the mixed pulp casting that step (1) is obtained, and after 40-60 ℃ of precuring 1.5-2.5 hour, cut into the building block base;
(3) described building block base is obtained the polypropylene fiber concrete building block behind steam press maintenance.
4. the preparation method of air-entrained concrete building block according to claim 3, it is characterized in that, step (1) is specially: raw material powder coal ash 65-72 part and phosphogypsum 2.83-3.83 part are added water grind and make flyash magma, order adds unslaked lime 15-20 part, cement 5-10 part, 0.02 part of polypropylene fibre, aerating is stirred temperature of charge is reached about 42 ℃, add 0.1 part of aluminium powder again, 0.05 part of thorough mixing of suds-stabilizing agent is prepared into mixed pulp.
5. the preparation method of air-entrained concrete building block according to claim 3 is characterized in that, described flyash magma is identical with the diffusibleness of mixed pulp, is 26-28cm.
6. the preparation method of air-entrained concrete building block according to claim 3 is characterized in that, the steam press maintenance of described step (3) comprise vacuumize, boost, constant voltage, step-down, five stages of exhaust:
Described vacuumizing is evacuated to pounds per square inch absolute (psia) 0.06Mpa, and under this pressure vacuum kept 0.5h;
Described boosting rises to pounds per square inch absolute (psia) 1.3Mpa, and the time of the process of boosting is 1.75h;
Described constant voltage keeps pounds per square inch absolute (psia) 1.3Mpa, and constant voltage time length is 8.0h;
Described step-down is reduced to normal pressure by pounds per square inch absolute (psia) 1.3Mpa, and the step-down process time is 1.75h.
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| CN102515681A (en) * | 2011-12-12 | 2012-06-27 | 昆明理工大学 | Method for producing aerated building block with phosphogypsum as main raw material |
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| CN103553534A (en) * | 2013-10-30 | 2014-02-05 | 天津城建大学 | Technology for preparing composite desulphurization gypsum building block with gradient structure |
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| CN105000852A (en) * | 2015-06-26 | 2015-10-28 | 安徽恒创环保建材有限公司 | Autoclaved aerated concrete block and preparation method thereof |
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Application publication date: 20111005 Assignee: FUJIAN SHAOWU YUANTONG NEW BUILDING MATERIAL CO., LTD. Assignor: Yu Huagui Contract record no.: 2013350000143 Denomination of invention: Aerated concrete building block and preparation technology thereof Granted publication date: 20130605 License type: Exclusive License Record date: 20130830 |
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