CN104310885A - Environment-friendly autoclaved lightweight aerated concrete super-thin plate - Google Patents

Environment-friendly autoclaved lightweight aerated concrete super-thin plate Download PDF

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Publication number
CN104310885A
CN104310885A CN201410529044.3A CN201410529044A CN104310885A CN 104310885 A CN104310885 A CN 104310885A CN 201410529044 A CN201410529044 A CN 201410529044A CN 104310885 A CN104310885 A CN 104310885A
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weight
thin plate
aerated concrete
cement
aluminium powder
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CN201410529044.3A
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Inventor
陈海波
陈爱国
陈仁训
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Guo Gao Building Materials Science And Technology Ltd Of Nan'an
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Guo Gao Building Materials Science And Technology Ltd Of Nan'an
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Priority to CN201410529044.3A priority Critical patent/CN104310885A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses an environment-friendly autoclaved lightweight aerated concrete super-thin plate. The concrete plate blank body comprises the following basic material components in the weight proportions: 1,400-2,200 kg of coal ash, 480-700 kg of cements, 420-620 kg of quick limes, 30-120 kg of slaked limes, 42-50 kg of desulfurization gypsum, 37-50 kg of magnesia, 4.0-4.5 kg of powdered aluminum paste, 0.05-0.1 kg of foam stabilizers, 5-50 kg of glass beads, 5-50 kg of high-performance heat-preservation water-retention reinforcing agents and 0.1-10 kg of cellulose ether; the high-performance heat-preservation water-retention reinforcing agents are prepared by mixing 1-40 parts by weight of three-level diatomite, 2-20 parts by weight of silica fume, 1-5 parts by weight of high-efficiency slushing agents and 0.05-5 parts by weight of air entraining agents; the type of the cements is PxO42.5; the powdered aluminum paste is watery powdered aluminum paste; the foam stabilizers are Chinese honey locust powder, nekal, tea saponin or soluble oil.

Description

A kind of environmental protection autoclaved lightweight aerated concrete ultra thin plate
Technical field
The present invention relates to a kind of environmental protection autoclaved lightweight aerated concrete ultra thin plate and preparation method.
Background technology
The current unit floor area of building heating energy consumption of China is equivalent to 3 ~ 4 times of the close developed country of weather, and along with the aggravation of energy dilemma, reasonable energy utilization, the utilization ratio improving the energy are the tasks of paramount importance of Chinese society development.China's building energy conservation has been listed in programmatic document and the rigid index of building, its core is exactly to buildings enclosed structure and heating system reform, wherein wall construction technology plays more and more important effect in building energy conservation, and the renewal of wall heat insulation material is significant to building energy conservation.In recent years, developed rapidly with the novel wall energy-saving material that air-entrained concrete building block is main substitute, self-heat conserving air-entrained concrete building block is used for reinforced concrete frame structure exterior wall, infilled wall or forms self-heat conserving external wall for mixed structure exterior wall, has the feature of thermal and insulating performance excellence.But the heat insulation building block that on domestic market, aerated concrete density, intensity and thermal conductivity meet the demands is also rarely found simultaneously.Application number is that CN201010247050.1 name is called that the patent of invention of " powder ash air-entrained concrete building block and preparation method thereof " discloses a kind of aerated coal ash concrete building block and preparation method thereof, and its dry volume density of inventing the building block utilizing flyash to prepare is at 500 ~ 700 kg/m 3, building block dry density is comparatively large, and thermal and insulating performance is poor; In preparation process, this invention controls the temperature of flyash slip at 43 ~ 46 DEG C, control slurry temperature after adding unslaked lime still to remain on 43 ~ 46 DEG C and be difficult to accomplish, can because water met by unslaked lime react and release a large amount of heats rapidly, therefore the formula and processing technology method of foregoing invention haves much room for improvement.
Summary of the invention
The object of the invention is the shortcoming overcoming prior art, provides a kind of environmental protection autoclaved lightweight aerated concrete ultra thin plate, and this building block pore opening is even, and containing a large amount of pore micropores, thermal conductivity is low, and self-heat conserving performance is good.
Present invention also offers the preparation method of above-mentioned autoclave aerated concrete building block, for achieving the above object, the present invention adopts following technical scheme: a kind of environmental protection autoclaved lightweight aerated concrete ultra thin plate, the weight proportion of this concrete slab base substrate base mateiral component is: flyash 1400 ~ 2200 kg, cement 480-700 kg, unslaked lime 420-620 kg, white lime 30-120 kg, desulfurated plaster 42-50 kg, magnesia 37-50 kg, aluminium powder cream 4.0-4.5 kg, suds-stabilizing agent 0.05-0.1 kg, glass bead 5-50 kg, high-performance insulation water retention enhancing agents 5-50 kg, ether of cellulose 0.1-10 kg, high-performance insulation water retention enhancing agents is wherein by three grades of diatomite 1-40 weight parts, silicon ash 2-20 weight part, high efficiency water reducing agent 1-5 weight part, air entrapment agent 0.05-5 weight part mixing composition, described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, and described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, also comprises reinforcing mat, and it is made up of upper and lower two-layer reinforced mesh and the reinforcing bar that connects upper and lower two-layer mesh sheet, bar gauge is HPB235, φ 5 ~ φ 6 mm.
The preparation method of described autoclaved lightweight aerated concrete ultra thin plate is as follows:
1) by unslaked lime with after jaw crushing crusher machine, tail over to fineness 0.08 mm square hole sieve the powder being not more than 10 % with ball mill grinding;
2) add water flyash mix and blend, adds building block waste material, white lime and desulfurated plaster in whipping process, controls slurry diffusibleness at 28 ~ 35mm, proportion 1.45 ~ 1.60, temperature at 38 ~ 45 DEG C, stir speed (S.S.) at 120 ~ 130 r/min, churning time 2 ~ 3 h;
3) aluminium powder cream, suds-stabilizing agent, glass bead, high-performance insulation water retention enhancing agents, ether of cellulose added in aluminium powder stirred pot and stir, stir speed (S.S.) is 220 ~ 250 r/min, for subsequent use;
4) cement mixed and calcium lime powder are joined step 2) stirring and evenly mixing in gained material, control slurry diffusibleness at 16 ~ 18 cm, temperature is at 40 ~ 46 DEG C, stir speed (S.S.) 600 ~ 700 r/min, and then add step 3) gained material stirring 30 ~ 60 s and namely pour into a mould, temperature 40 ~ 45 DEG C is sent to, static maintenance 90 ~ 120 min in the room of resting of humidity 55 ~ 60 % after cast;
5) base substrate that the demoulding is carried out in static maintenance after terminating, cutting obtains required specification; Then base substrate is sent to maintenance 40 ~ 60 min in the precuring room of temperature 80 ~ 85 DEG C, humidity 60 ~ 95 %, be transferred to after end carry out in autoclave steam-cured, go out inspection, packaging and warehousing after still, natural curing 5 days finished product, the conservation system in autoclave is: in 2 ~ 2.5 h air inlet be warming up to 1.1 ~ 1.2MPa, 180 ~ 190 DEG C; After constant voltage constant temperature keeps 8 ~ 10 h; Exhaust cooling step-down in 1.5 ~ 2 h.
Compared with existing production technology, while the building block waste material that the present invention is unnecessary after making full use of fly ash in electric power plant, desulfurated plaster and cutting, can prepare B04, B05, B06, B07 level self-heat conserving powder ash air-entrained concrete building block, such autoclave aerated concrete building block product has the following advantages:
1) unit weight is light, and its weight only has 1/3 of clay brick, 1/5 of normal concrete, is the desirable light material of high level, high-rise building and large spatial structure building;
2) building block pore opening of the present invention is even, and containing a large amount of pore micropores, hole wall is thinner, sphericity is high, light weight is high-strength, and resistance of heat transfer is little, and thermal conductivity is low, good heat insulating, the thermal conductivity of autoclave aerated concrete building block at different levels of the present invention, between 0.08 ~ 0.16 W/ (m.K), lower than the relevant national standard of appropriate level, has self-heat conserving performance, be only 1/4 ~ 1/5 of clay thermal conductivity, 1/5 ~ 1/10 of normal concrete;
3) workability is strong, and autoclave aerated concrete building block of the present invention has good elastic modulus E, can saw, digs, bores, follow closely, and field fabrication is strong, provides favourable condition to building operation;
4) utilize power plant's solid waste production building block, sufficient raw, production energy consumption is low.
Through test determination, compared with traditional autoclave aerated concrete building block, building block product of the present invention has good physical and mechanical property and weather resistance.The thermal conductivity of product lower than concerned countries standard, 70 ~ 80 % of average out to standard-required.。
Embodiment
In order to make the object of patent protection of the present invention, technical scheme and advantage clearly understand, below the present invention is further elaborated.
Embodiment 1
A kind of environmental protection autoclaved lightweight aerated concrete ultra thin plate, the weight proportion of this concrete slab base substrate base mateiral component is: flyash 1400 kg, cement 480 kg, unslaked lime 420 kg, white lime 30 kg, desulfurated plaster 42 kg, magnesia 37 kg, aluminium powder cream 4.0kg, suds-stabilizing agent 0.05 kg, glass bead 5 kg, high-performance insulation water retention enhancing agents 5 kg, ether of cellulose 0.1 kg, high-performance insulation water retention enhancing agents is wherein by three grades of diatomite 1-40 weight parts, silicon ash 2-20 weight part, high efficiency water reducing agent 1-5 weight part, air entrapment agent 0.05-5 weight part mixing composition, described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, and described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, also comprises reinforcing mat, and it is made up of upper and lower two-layer reinforced mesh and the reinforcing bar that connects upper and lower two-layer mesh sheet, bar gauge is HPB235, φ 5 ~ φ 6 mm.
The preparation method of described autoclaved lightweight aerated concrete ultra thin plate is as follows:
1) by unslaked lime with after jaw crushing crusher machine, tail over to fineness 0.08 mm square hole sieve the powder being not more than 10 % with ball mill grinding;
2) add water flyash mix and blend, adds building block waste material, white lime and desulfurated plaster in whipping process, controls slurry diffusibleness at 28 ~ 35mm, proportion 1.45 ~ 1.60, temperature at 38 ~ 45 DEG C, stir speed (S.S.) at 120 ~ 130 r/min, churning time 2 ~ 3 h;
3) aluminium powder cream, suds-stabilizing agent, glass bead, high-performance insulation water retention enhancing agents, ether of cellulose added in aluminium powder stirred pot and stir, stir speed (S.S.) is 220 ~ 250 r/min, for subsequent use;
4) cement mixed and calcium lime powder are joined step 2) stirring and evenly mixing in gained material, control slurry diffusibleness at 16 ~ 18 cm, temperature is at 40 ~ 46 DEG C, stir speed (S.S.) 600 ~ 700 r/min, and then add step 3) gained material stirring 30 ~ 60 s and namely pour into a mould, temperature 40 ~ 45 DEG C is sent to, static maintenance 90 ~ 120 min in the room of resting of humidity 55 ~ 60 % after cast;
5) base substrate that the demoulding is carried out in static maintenance after terminating, cutting obtains required specification; Then base substrate is sent to maintenance 40 ~ 60 min in the precuring room of temperature 80 ~ 85 DEG C, humidity 60 ~ 95 %, be transferred to after end carry out in autoclave steam-cured, go out inspection, packaging and warehousing after still, natural curing 5 days finished product, the conservation system in autoclave is: in 2 ~ 2.5 h air inlet be warming up to 1.1 ~ 1.2MPa, 180 ~ 190 DEG C; After constant voltage constant temperature keeps 8 ~ 10 h; Exhaust cooling step-down in 1.5 ~ 2 h.
Carry out correlated performance detection according to GB/T11969-2008 " steam-pressing aero-concrete method for testing performance ", GB/T10294-2008 " the mensuration Guarded hot plate of Technology of Steady State Thermal Resistance of Thermal Insulating Material and related characteristics " to above-mentioned building block finished product, result is as following table:
Embodiment 2
A kind of environmental protection autoclaved lightweight aerated concrete ultra thin plate, the weight proportion of this concrete slab base substrate base mateiral component is: flyash 2200 kg, cement 700 kg, unslaked lime 620 kg, white lime 120 kg, desulfurated plaster 50 kg, magnesia 37-50 kg, aluminium powder cream 4.0-4.5 kg, suds-stabilizing agent 0.05-0.1 kg, glass bead 5-50 kg, high-performance insulation water retention enhancing agents 5-50 kg, ether of cellulose 0.1-10 kg, high-performance insulation water retention enhancing agents is wherein by three grades of diatomite 1-40 weight parts, silicon ash 2-20 weight part, high efficiency water reducing agent 1-5 weight part, air entrapment agent 0.05-5 weight part mixing composition, described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, and described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, also comprises reinforcing mat, and it is made up of upper and lower two-layer reinforced mesh and the reinforcing bar that connects upper and lower two-layer mesh sheet, bar gauge is HPB235, φ 5 ~ φ 6 mm.
The preparation method of described autoclaved lightweight aerated concrete ultra thin plate is as follows:
1) by unslaked lime with after jaw crushing crusher machine, tail over to fineness 0.08 mm square hole sieve the powder being not more than 10 % with ball mill grinding;
2) add water flyash mix and blend, adds building block waste material, white lime and desulfurated plaster in whipping process, controls slurry diffusibleness at 28 ~ 35mm, proportion 1.45 ~ 1.60, temperature at 38 ~ 45 DEG C, stir speed (S.S.) at 120 ~ 130 r/min, churning time 2 ~ 3 h;
3) aluminium powder cream, suds-stabilizing agent, glass bead, high-performance insulation water retention enhancing agents, ether of cellulose added in aluminium powder stirred pot and stir, stir speed (S.S.) is 220 ~ 250 r/min, for subsequent use;
4) cement mixed and calcium lime powder are joined step 2) stirring and evenly mixing in gained material, control slurry diffusibleness at 16 ~ 18 cm, temperature is at 40 ~ 46 DEG C, stir speed (S.S.) 600 ~ 700 r/min, and then add step 3) gained material stirring 30 ~ 60 s and namely pour into a mould, temperature 40 ~ 45 DEG C is sent to, static maintenance 90 ~ 120 min in the room of resting of humidity 55 ~ 60 % after cast;
5) base substrate that the demoulding is carried out in static maintenance after terminating, cutting obtains required specification; Then base substrate is sent to maintenance 40 ~ 60 min in the precuring room of temperature 80 ~ 85 DEG C, humidity 60 ~ 95 %, be transferred to after end carry out in autoclave steam-cured, go out inspection, packaging and warehousing after still, natural curing 5 days finished product, the conservation system in autoclave is: in 2 ~ 2.5 h air inlet be warming up to 1.1 ~ 1.2MPa, 180 ~ 190 DEG C; After constant voltage constant temperature keeps 8 ~ 10 h; Exhaust cooling step-down in 1.5 ~ 2 h.
Carry out correlated performance detection according to GB/T11969-2008 " steam-pressing aero-concrete method for testing performance ", GB/T10294-2008 " the mensuration Guarded hot plate of Technology of Steady State Thermal Resistance of Thermal Insulating Material and related characteristics " to above-mentioned building block finished product, result is as following table:
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.

Claims (5)

1. an environmental protection autoclaved lightweight aerated concrete ultra thin plate, the weight proportion of this concrete slab base substrate base mateiral component is: flyash 1400-2200 kg, cement 480-700 kg, unslaked lime 420-620 kg, white lime 30-120 kg, desulfurated plaster 42-50 kg, magnesia 37-50 kg, aluminium powder cream 4.0-4.5 kg, suds-stabilizing agent 0.05-0.1 kg, glass bead 5-50 kg, high-performance insulation water retention enhancing agents 5-50 kg, ether of cellulose 0.1-10 kg, high-performance insulation water retention enhancing agents is wherein by three grades of diatomite 1-40 weight parts, silicon ash 2-20 weight part, high efficiency water reducing agent 1-5 weight part, composite air entraining agent 0.05-5 weight part mixing composition, described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, and described cement is PO 42.5 cement, described aluminium powder cream is water aqua type aluminium powder cream, described suds-stabilizing agent is Chinese honey locust powder, pulls open powder, tea saponin or soluble oil, also comprises reinforcing mat, and it is made up of upper and lower two-layer reinforced mesh and the reinforcing bar that connects upper and lower two-layer mesh sheet, bar gauge is HPB235, φ 5 ~ φ 6 mm.
2. autoclaved lightweight aerated concrete ultra thin plate as claimed in claim 1, is characterized in that: described composite air entraining agent is two or more in triterpenoid saponin, rosined soap, Sodium dodecylbenzene sulfonate, aliphatic alcohol polyethenoxy sodium sulfonate.
3. autoclaved lightweight aerated concrete ultra thin plate as claimed in claim 1, is characterized in that: water reducer is formulated by weight by following component: polyester poly carboxylic acid mother liquor: 150-300 part; Polyethers poly carboxylic acid mother liquor: 100-200 part.
4. autoclaved lightweight aerated concrete ultra thin plate as claimed in claim 1, is characterized in that: described defoamer is higher alcohols defoamer.
5. the preparation method of autoclaved lightweight aerated concrete ultra thin plate as claimed in claim 1, is characterized in that as follows:
1) by unslaked lime with after jaw crushing crusher machine, tail over to fineness 0.08 mm square hole sieve the powder being not more than 10 % with ball mill grinding;
2) add water flyash mix and blend, adds building block waste material, white lime and desulfurated plaster in whipping process, and control slurry diffusibleness at 28-35mm, proportion is 1.45 ~ 1.60, and temperature is at 38 ~ 45 DEG C, and stir speed (S.S.) is at 120-130 r/min, churning time 2-3 h;
3) aluminium powder cream, suds-stabilizing agent, glass bead, high-performance insulation water retention enhancing agents, ether of cellulose added in aluminium powder stirred pot and stir, stir speed (S.S.) is 220 ~ 250 r/min, for subsequent use;
4) cement mixed and calcium lime powder are joined step 2) stirring and evenly mixing in gained material, control slurry diffusibleness at 16-18 cm, temperature is at 40-46 DEG C, stir speed (S.S.) 600-700 r/min, and then add step 3) gained material stirring 30-60 s and namely pour into a mould, temperature 40-5 DEG C is sent to, static maintenance 90-120 min in the room of resting of humidity 55-60 % after cast;
5) base substrate that the demoulding is carried out in static maintenance after terminating, cutting obtains required specification; Then base substrate is sent to temperature 80-85 DEG C, maintenance 40-60 min in the precuring room of humidity 60-95 %, be transferred to after end carry out in autoclave steam-cured, go out inspection, packaging and warehousing after still, natural curing obtains finished product in 5 days, and the conservation system in autoclave is: in 2-2.5 h, air inlet is warming up to 1.1-1.2MPa, 180-190 DEG C; After constant voltage constant temperature keeps 8 ~ 10 h; Exhaust cooling step-down in 1.5-2 h.
CN201410529044.3A 2014-10-10 2014-10-10 Environment-friendly autoclaved lightweight aerated concrete super-thin plate Pending CN104310885A (en)

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
CN104860708A (en) * 2015-05-08 2015-08-26 太原钢铁(集团)有限公司 Method for steaming and curing a fly ash aerated concrete slab
CN105198331A (en) * 2015-09-14 2015-12-30 河南兴安新型建筑材料有限公司 Lime-free Yellow River sand autoclaved aerated concrete and preparation method thereof
CN106746983A (en) * 2016-12-09 2017-05-31 广西亿品投资有限公司 The processing technology of concrete segment
CN106966671A (en) * 2017-05-10 2017-07-21 云南兴顺实业发展有限公司 A kind of steam-pressing aero-concrete (AAC) sheet material and preparation method thereof
CN107759248A (en) * 2017-10-18 2018-03-06 南宁积家市场建设有限公司 A kind of maintenance process of light cellular partition board
CN108529949A (en) * 2018-04-11 2018-09-14 山东联海新型建材有限公司 A kind of light-weighted autoclaved air entrained concrete plate material and preparation method
CN109809782A (en) * 2019-03-14 2019-05-28 贵州安顺家喻新型材料股份有限公司 A kind of steam-aerated concrete plate and preparation method thereof
CN110713372A (en) * 2019-12-07 2020-01-21 江苏宏盛环保科技有限公司 Autoclaved aerated concrete block for integrated wall system and preparation method thereof

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CN103553478A (en) * 2013-11-11 2014-02-05 吉林建筑大学 Insulation masonry mortar for aerated concrete self-insulation building blocks in severe cold area and production method of insulation masonry mortar
CN103664114A (en) * 2013-11-14 2014-03-26 河南兴安新型建筑材料有限公司 Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof
CN103693928A (en) * 2013-11-14 2014-04-02 河南兴安新型建筑材料有限公司 Autoclaved aerated concrete plate produced by using Yellow River sand, and production method thereof

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CN103553478A (en) * 2013-11-11 2014-02-05 吉林建筑大学 Insulation masonry mortar for aerated concrete self-insulation building blocks in severe cold area and production method of insulation masonry mortar
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104860708A (en) * 2015-05-08 2015-08-26 太原钢铁(集团)有限公司 Method for steaming and curing a fly ash aerated concrete slab
CN105198331A (en) * 2015-09-14 2015-12-30 河南兴安新型建筑材料有限公司 Lime-free Yellow River sand autoclaved aerated concrete and preparation method thereof
CN106746983A (en) * 2016-12-09 2017-05-31 广西亿品投资有限公司 The processing technology of concrete segment
CN106966671A (en) * 2017-05-10 2017-07-21 云南兴顺实业发展有限公司 A kind of steam-pressing aero-concrete (AAC) sheet material and preparation method thereof
CN107759248A (en) * 2017-10-18 2018-03-06 南宁积家市场建设有限公司 A kind of maintenance process of light cellular partition board
CN108529949A (en) * 2018-04-11 2018-09-14 山东联海新型建材有限公司 A kind of light-weighted autoclaved air entrained concrete plate material and preparation method
CN109809782A (en) * 2019-03-14 2019-05-28 贵州安顺家喻新型材料股份有限公司 A kind of steam-aerated concrete plate and preparation method thereof
CN110713372A (en) * 2019-12-07 2020-01-21 江苏宏盛环保科技有限公司 Autoclaved aerated concrete block for integrated wall system and preparation method thereof
CN110713372B (en) * 2019-12-07 2020-06-05 江苏宏盛环保科技有限公司 Autoclaved aerated concrete block for integrated wall surface system and preparation method thereof

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Application publication date: 20150128