CN108863186A - A kind of fire prevention solid light partition plate and its production technology - Google Patents

A kind of fire prevention solid light partition plate and its production technology Download PDF

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Publication number
CN108863186A
CN108863186A CN201810854883.0A CN201810854883A CN108863186A CN 108863186 A CN108863186 A CN 108863186A CN 201810854883 A CN201810854883 A CN 201810854883A CN 108863186 A CN108863186 A CN 108863186A
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China
Prior art keywords
additive
partition plate
solid light
production technology
weight
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CN201810854883.0A
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Chinese (zh)
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赵跃
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广西易筑装配式建材科技有限公司
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Publication of CN108863186A publication Critical patent/CN108863186A/en

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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02Treatment
    • C04B20/026Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/28Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52Sound-insulating materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses a kind of production technologies of solid light partition plate of preventing fires, and include the following steps:1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene foam, additive, according to (33-37):(33-37):(28-32):(14-16):(9-11):The weight ratio of (4-6);2) it is mixed:Above-mentioned particulate material is subjected to break process, the polystyrene foam of water and 60-70% weight is added, is uniformly mixed;3) by additive and remaining polystyrene foam, the material obtained again with upper step after mixing is uniformly mixed by blender;4) molding is poured:Steel wire, the material that step obtains in pouring, mechanical verticle mould shaping are laid in mold;5) demoulding, product inspection, storage are formed.

Description

A kind of fire prevention solid light partition plate and its production technology
Technical field
The invention belongs to building material technical field, it is related to a kind of fire prevention solid light partition plate and its production technology, especially It is related to a kind of steel mesh enhancing fire prevention solid light partition plate and its production technology.
Background technique
In existing market, 1, calcium silicate composite light partition plate, advantage:It is solid, hanging performance it is good, energy conservation it is good, sound insulation is good; Disadvantage:After calcium silicate board and core material polyphenyl particle heat-insulating mortar are compound, due to spring, summer, autumn and winter, winter alternates with summer, two kinds of material cold-heats Shrinkage value is different, and the time, which has been grown, is easy for the too smooth secondary decoration difficulty in aliquation, surface.2, GRC partition plate, advantage:Intensity is high; Disadvantage:Fragility is big, flexural capacity is poor, the proportion of goods damageds are high, and hollow hanging relative mistake, sound insulation are poor.3, magnesite partition wall plate, advantage:Weight It gently, can antidetonation;Disadvantage:Sound insulation is poor, poor, ageing-resistant poor, the easy anti-halogen of single-point hanging.4, air-entrained concrete building block, advantage:Weight Gently;Disadvantage:Intensity is low, water absorption rate is high, non-seismic.5, cement hollow building blocks, advantage:It is at low cost, intensity is high;Disadvantage:Weight weight, Antidetonation is poor, sound insulation is poor, single-point hanging force is poor.6, autoclaved lightweight concrete wallboard, advantage:Heat preservation, heat-insulated, lightweight;Disadvantage:Intensity It is low, water absorption rate is high, hanging force is poor.
Steel wire enhancing cement (SRC) lightweight inner partition wall plate refers to using cement as cementitious material, is filling material with flyash Material, with leca, expanded perlite etc. for light material, using steel wire as reinforcing material, is added a certain amount of adulterating agent, benefit With the compounded hollow wall panel for industry and non-load bearing inner partition wall in civil buildings of high-tech technology.Using mechanical metaplasia Producing line is produced using the method for formwork erection moulding by casting, solve manual production trivial operations, labor intensity are high, production efficiency is low, The problems such as unstable product quality, achieves preferable effect in practical applications.Its feature:1, Jian autoclaved lightweight coagulation is kept away The weak disadvantage of cob wall plate water absorption rate height, intensity difference, hanging force;2, the sound insulation for keeping away Jian magnesite wallboard is poor, returns halogen, does not keep the temperature, corrodes The disadvantages of metal component;3, it keeps away the Jian calcium silicates combined wall board time and has grown the shortcomings that panel is detached from sandwich layering;4, Jian sky is kept away The disadvantage that the resetting of septum cordis wallboard is too heavy, not sound insulation, hanging force is poor, installation is inconvenient;5, the non-water-tight disadvantage of Jian gypsum wallboard is kept away;6, Keep away not the preventing fires of Jian other wall board materials, not environmentally the shortcomings that;7, it is all with the not strong and a variety of material of secondary decoration cohesive force to keep away Jian The shortcomings that material is squeegeeed;8, the shortcomings that keeping away the anti-folding of Jian other partition plates, poor seismic behavior;9, all partition plates of Jian are kept away and hold nail ability Difference, single-point hanging force be not strong and the wiring of Jian Right pipe laying is inconvenient, and expansion screw etc. also needs the shortcomings that doing second of processing; 10, other materials for walls of Jian are kept away and there is the shortcomings that moist and leakage;11, increase usable floor area, structure materials standard reduces, cost Greatly reduce.
Steel mesh enhancing fire prevention solid light partition plate, is adapted to the prefabricated partition and light steel of high-rise assembled architecture The roof boarding of villa and low layer assembled architecture, floorboard etc., have good market prospects.
Summary of the invention
The present invention provides a kind of fire prevention solid light partition plate and its production technology, obtains a kind of steel mesh enhancing one fire prevention Solid light partition plate, fire endurance at a high temperature of 1000 DEG C is more than 4.8 hours, and does not distribute toxic gas, anti- In fire test, indoor temperature can be effectively reduced.
A kind of production technology for solid light partition plate of preventing fires, includes the following steps:
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, additive, according to (33-37):(33-37):(28-32):(14-16):(9-11):The weight ratio of (4-6);
2) it is mixed:Above-mentioned particulate material is subjected to break process, the polystyrene of water and 60-70% weight is added (EPS) foam is uniformly mixed;
3) by additive and remaining polystyrene (EPS) foam, the material obtained again with upper step after mixing is passed through Blender is crossed to be uniformly mixed;
4) molding is poured:Steel wire, the material that step obtains in pouring, mechanical verticle mould shaping are laid in mold;
5) demoulding, product inspection, storage are formed;
The additive is prepared by the following procedure method and obtains:
1. selecting sufficiently maturation, no disease and pests harm, 2 parts by weight of fresh dragon fruit without rotting, 1 parts by weight of lichee, cleaning dry Peeling, stoning after net, attrition crushing are passed through drying nitrogen with the rate of 2L/min and squeeze full of entire during extruding Machine, isolated flesh puree and pomace;
2. ultra high pressure treatment:The pure water of 3-5 times of parts by weight is added in 1. pomace that step obtains, pressure 350MPa makees With 40-50 DEG C of temperature, ultra high pressure treatment 2-5min;
3. ultrasonication:2. step is obtained into material, ultrasonication 5-10min, 40-50 DEG C of operative temperature, power For 300W, filtering, filter residue is additive.
Coarse aggregate described in step 1) of the present invention is by yellow sand, mountain flour, sawdust, stalk, according to 40:30:20:10 weight Amount is than composition.
Preparation cement, flyash described in step 1), coarse aggregate, water, polystyrene (EPS) foam, additive, be according to 35:35:30:15:10:5 weight ratio.
Break process described in step 2) is by particulate material break process into 4-6mm.
It is laid with steel wire in mold described in step 4), is to be laid with the ripple steel wire being consistent with mold size in mold Net.
The invention further relates to the solid light partition plates obtained using above-mentioned production technology.
Compared with prior art, the present invention has the following advantages that:
1. a kind of steel mesh that the present invention obtains enhances integrated solid light partition plate, there is built-in steel wire net rack, once pour Type is built up, no calcium silicate board is compound, the same smooth feature in two sides.The present invention, which uses, is laid with steel wire as reinforcing material, no But it solves the problems, such as that existing product is corroded using after the glass fiber mesh several years, and the anti-folding of wallboard, anti-impact force can be increased.
2, fire endurance at a high temperature of 1000 DEG C is more than 4.8 hours, and does not distribute toxic gas, in flammability test In, indoor temperature can be effectively reduced.
3, the additive used in the present invention improves fire-proof and water-proof performance after use while increasing intensity, accelerates solidification Time.Additive used in the present invention derives from the waste after fruit juice production, after general dragon fruit, lichee press juice, Obtained pomace can be simply discarded, and the present invention passes through ultra high pressure treatment, ultrasonication pomace, ultra high pressure treatment flue Fruit, lichee raw material are kept for a period of time in predetermined pressure, and so that pomace intraor extracellular pressure is reached balance, (effective component reaches molten Solution balance) rapid release afterwards, increase intraor extracellular osmotic pressure difference suddenly, destroys the tissue of cell, then by ultrasonic wave Reason, what is utilized is strong mechanical shearing effect, so that pomace be made to disperse, as additive, makes wallboard inside forming face ladle sample Honeycomb plays preferable sound insulation and heat insulation effect, and applicant also found in the experiment of early period, if after directly squeezing Pomace as additive be added solid light partition wall plate prescription in, obtain the technical indicator and existing technical solution phase of product The very big gap than having.
4, the present invention additive in use, cannot directly and other solid light partition plate feed particles mixing after again With polystyrene (EPS) foams mix, if operation in this way, one is the mixing unevenness that will lead to additive in mixed material It is even, cause the technical indicator of product to decline, another demoulding time that will lead to product extends, can be by demoulding time by existing It extends within 3.0-3.5 hours or so 5.0 hours or so.
Specific embodiment
It is further with the production technology of comparative example solid light partition plate of preventing fires a kind of to the present invention by the following examples Detailed description.But these embodiments are not regarded as limiting of the invention.
Embodiment 1
A kind of production technology for solid light partition plate of preventing fires, includes the following steps:
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, additive, according to 37: 33:28:16:9:4 weight ratio;
2) it is mixed:Above-mentioned particulate material is subjected to break process into 4-6mm, the poly- of water and 60-70% weight is added Third ethylene (EPS) foam is uniformly mixed;
3) by additive and remaining polystyrene (EPS) foam, the material obtained again with upper step after mixing is passed through Blender is crossed to be uniformly mixed;
4) molding is poured:The ripple steel wire being consistent with mold size, the object that step obtains in pouring are laid in mold Material, mechanical verticle mould shaping;
5) demoulding, product inspection, storage are formed;
The additive is prepared by the following procedure method and obtains:
1. selecting sufficiently maturation, no disease and pests harm, 2 parts by weight of fresh dragon fruit without rotting, 1 parts by weight of lichee, cleaning dry Peeling, stoning after net, attrition crushing are passed through drying nitrogen with the rate of 2L/min and squeeze full of entire during extruding Machine, isolated flesh puree and pomace;
2. ultra high pressure treatment:The pure water of 3 times of parts by weight, pressure 350MPa, effect are added in 1. pomace that step obtains Temperature 50 C, ultra high pressure treatment 2min;
3. ultrasonication:2. step is obtained into material, ultrasonication 5min, 450 DEG C of operative temperature, power is 300W, filtering, filter residue is additive.
Embodiment 2
A kind of production technology for solid light partition plate of preventing fires, includes the following steps:
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, additive, according to 33: 37:32:14:11:6 weight ratio;
2) it is mixed:Above-mentioned particulate material is subjected to break process into 4-6mm, the poly- of water and 60-70% weight is added Third ethylene (EPS) foam is uniformly mixed;
3) by additive and remaining polystyrene (EPS) foam, the material obtained again with upper step after mixing is passed through Blender is crossed to be uniformly mixed;
4) molding is poured:The ripple steel wire being consistent with mold size, the object that step obtains in pouring are laid in mold Material, mechanical verticle mould shaping;
5) demoulding, product inspection, storage are formed;
The additive is prepared by the following procedure method and obtains:
1. selecting sufficiently maturation, no disease and pests harm, 2 parts by weight of fresh dragon fruit without rotting, 1 parts by weight of lichee, cleaning dry Peeling, stoning after net, attrition crushing are passed through drying nitrogen with the rate of 2L/min and squeeze full of entire during extruding Machine, isolated flesh puree and pomace;
2. ultra high pressure treatment:The pure water of 5 times of parts by weight, pressure 350MPa, effect are added in 1. pomace that step obtains 40 DEG C of temperature, ultra high pressure treatment 5min;
3. ultrasonication:2. step is obtained into material, ultrasonication 10min, 40 DEG C of operative temperature, power is 300W, filtering, filter residue is additive.
Embodiment 3
A kind of production technology for solid light partition plate of preventing fires, includes the following steps:
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, additive, according to 35: 35:30:15:10:5 weight ratio;
2) it is mixed:Above-mentioned particulate material is subjected to break process into 4-6mm, the poly- of water and 60-70% weight is added Third ethylene (EPS) foam is uniformly mixed;
3) by additive and remaining polystyrene (EPS) foam, the material obtained again with upper step after mixing is passed through Blender is crossed to be uniformly mixed;
4) molding is poured:The ripple steel wire being consistent with mold size, the object that step obtains in pouring are laid in mold Material, mechanical verticle mould shaping;
5) demoulding, product inspection, storage are formed;
The additive is prepared by the following procedure method and obtains:
1. selecting sufficiently maturation, no disease and pests harm, 2 parts by weight of fresh dragon fruit without rotting, 1 parts by weight of lichee, cleaning dry Peeling, stoning after net, attrition crushing are passed through drying nitrogen with the rate of 2L/min and squeeze full of entire during extruding Machine, isolated flesh puree and pomace;
2. ultra high pressure treatment:The pure water of 4 times of parts by weight, pressure 350MPa, effect are added in 1. pomace that step obtains Temperature 45 C, ultra high pressure treatment 3min;
3. ultrasonication:2. step is obtained into material, ultrasonication 8min, 45 DEG C of operative temperature, power 300W, Filtering, filter residue is additive.
Comparative example 1
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, according to 35:35:30: 15:10 weight ratio;
2) it is mixed:Above-mentioned particulate material is subjected to break process into 4-6mm, the poly- of water and 60-70% weight is added Third ethylene (EPS) foam is uniformly mixed;
3) by additive and remaining polystyrene (EPS) foam, the material obtained again with upper step after mixing is passed through Blender is crossed to be uniformly mixed;
4) molding is poured:The ripple steel wire being consistent with mold size, the object that step obtains in pouring are laid in mold Material, mechanical verticle mould shaping;
5) demoulding, product inspection, storage are formed.
Comparative example 2
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, additive, according to 35: 35:30:15:10:5 weight ratio;
2) it is mixed:Above-mentioned particulate material and additive are subjected to break process into 4-6mm, water and polystyrene is added (EPS) foam is uniformly mixed by blender;
3) molding is poured:The ripple steel wire being consistent with mold size, the object that step obtains in pouring are laid in mold Material, mechanical verticle mould shaping;
4) demoulding, product inspection, storage are formed;
The additive is prepared by the following procedure method and obtains:
1. selecting sufficiently maturation, no disease and pests harm, 2 parts by weight of fresh dragon fruit without rotting, 1 parts by weight of lichee, cleaning dry Peeling, stoning after net, attrition crushing are passed through drying nitrogen with the rate of 2L/min and squeeze full of entire during extruding Machine, isolated flesh puree and pomace;
2. ultra high pressure treatment:The pure water of 4 times of parts by weight, pressure 350MPa, effect are added in 1. pomace that step obtains Temperature 45 C, ultra high pressure treatment 3min;
3. ultrasonication:2. step is obtained into material, ultrasonication 8min, 45 DEG C of operative temperature, power 300W, Filtering, filter residue is additive.
Experimental example
1, flammability test:After high fire is burnt 4 hours, 1000 DEG C of temperature of flame kernel point
2, technical indicator:Outer dimension 2100X610X120mm
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe Various corresponding changes and modifications, but these corresponding changes and modifications can be made according to the present invention by knowing those skilled in the art It all should belong to protection scope of the present invention.

Claims (6)

1. a kind of production technology for solid light partition plate of preventing fires, which is characterized in that include the following steps:
1) raw material preparation:Prepare cement, flyash, coarse aggregate, water, polystyrene foam, additive, according to (33-37):(33- 37):(28-32):(14-16):(9-11):The weight ratio of (4-6);
2) it is mixed:Above-mentioned particulate material is subjected to break process, the polystyrene foam of water and 60-70% weight is added, It is uniformly mixed;
3) by additive and remaining polystyrene foam, the material obtained again with upper step after mixing is mixed by blender It closes uniform;
4) molding is poured:Steel wire, the material that step obtains in pouring, mechanical verticle mould shaping are laid in mold;
5) demoulding, product inspection, storage are formed;
The additive is prepared by the following procedure method and obtains:
1. sufficiently maturation, no disease and pests harm, 2 parts by weight of fresh dragon fruit without rotting, 1 parts by weight of lichee are selected, after cleaning up Peeling, stoning, attrition crushing are passed through drying nitrogen full of entire extruder with the rate of 2L/min, divide during extruding From obtaining flesh puree and pomace;
2. ultra high pressure treatment:The pure water of 3-5 times of parts by weight, pressure 350MPa, action temperature are added in 1. pomace that step obtains 40-50 DEG C of degree, ultra high pressure treatment 2-5min;
3. ultrasonication:2. step is obtained into material, ultrasonication 5-10min, 40-50 DEG C of operative temperature, power is 300W, filtering, filter residue is additive.
2. a kind of production technology of solid light partition plate of preventing fires according to claim 1, it is characterised in that:Step 1) institute The coarse aggregate stated is by yellow sand, mountain flour, sawdust, stalk, according to 40:30:20:10 weight ratio composition.
3. a kind of production technology of solid light partition plate of preventing fires according to claim 1, it is characterised in that:Step 1) institute Preparation cement, flyash, coarse aggregate, water, polystyrene (EPS) foam, additive stated, are according to 35:35:30:15:10:5 Weight ratio.
4. a kind of production technology of solid light partition plate of preventing fires according to claim 1, it is characterised in that:Step 2) institute The break process stated is by particulate material break process into 4-6mm.
5. a kind of production technology of solid light partition plate of preventing fires according to claim 1, it is characterised in that:Step 4) institute That states is laid with steel wire in mold, is that the ripple steel wire being consistent with mold size is laid in mold.
6. the fire prevention solid light partition plate that production technology described in claim 1-5 obtains.
CN201810854883.0A 2018-07-31 2018-07-31 A kind of fire prevention solid light partition plate and its production technology CN108863186A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063441A (en) * 1991-01-26 1992-08-12 洪昭平 The improvement manufacture method of prefabricated panels
CN2599110Y (en) * 2002-12-23 2004-01-14 余毅 Light foamed sandwish wallboard
CN1704539A (en) * 2004-06-02 2005-12-07 陈田平 One-time pouring and forming construction method for lightweight solid wall
CN104432339A (en) * 2014-12-30 2015-03-25 广西修正堂药房连锁经营有限公司 Method for preparing dragon fruit and lychee drink

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063441A (en) * 1991-01-26 1992-08-12 洪昭平 The improvement manufacture method of prefabricated panels
CN2599110Y (en) * 2002-12-23 2004-01-14 余毅 Light foamed sandwish wallboard
CN1704539A (en) * 2004-06-02 2005-12-07 陈田平 One-time pouring and forming construction method for lightweight solid wall
CN104432339A (en) * 2014-12-30 2015-03-25 广西修正堂药房连锁经营有限公司 Method for preparing dragon fruit and lychee drink

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
邹光华等: "《采矿新技术》", 31 July 2013, 中国矿业大学出版社 *

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