CN101538167A - Porous concrete mixture and products and preparation method thereof - Google Patents

Porous concrete mixture and products and preparation method thereof Download PDF

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Publication number
CN101538167A
CN101538167A CN200910049395A CN200910049395A CN101538167A CN 101538167 A CN101538167 A CN 101538167A CN 200910049395 A CN200910049395 A CN 200910049395A CN 200910049395 A CN200910049395 A CN 200910049395A CN 101538167 A CN101538167 A CN 101538167A
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CN
China
Prior art keywords
porous concrete
mixture
concrete mixture
preparation
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN200910049395A
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Chinese (zh)
Inventor
陈兵
雒亚莉
陈龙珠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
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Shanghai Jiaotong University
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Filing date
Publication date
Application filed by Shanghai Jiaotong University filed Critical Shanghai Jiaotong University
Priority to CN200910049395A priority Critical patent/CN101538167A/en
Publication of CN101538167A publication Critical patent/CN101538167A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C04B28/34—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 cold phosphate binders
    • C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0004—Compounds chosen for the nature of their cations
    • C04B2103/0006—Alkali metal or inorganic ammonium compounds
    • C04B2103/0009—Inorganic ammonium compounds
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00586—Roofing materials
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • 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 relates to a porous concrete mixture and products and a preparation method thereof; the mixture has the following components by weight percentages: 7.5-30% of monoammonium phosphate, 2.45-9.8% of magnesia powder, 60-90% of fly ash, 0.05-0.2% of set-controlling material; the preparation of the concrete products formed by the mixture has the following steps: putting the porous concrete mixture in a stirring mill and stirring the mixture; adding mixing water with weight thereof being 25-50% of the weight of the porous concrete mixture to the mixture and fully stirring the mixture to form slurry; then casting the slurry into a mould for molding; carrying out demoulding after solidification and cutting the demoulded mixture into light weight concrete products of required size. The product of the invention can be used to produce light weight porous concrete products in factories or is cast to form heat preserving and heat insulating wall boards and roof thermal insulation slabs at the construction field; in addition, the porous concrete of the invention has the advantages of high strength at the early stage, even distribution, sealing and mutual non-communication of inner pores.

Description

The preparation method of porous concrete mixture and goods thereof
Technical field
The present invention relates to a kind of preparation method of concrete and goods thereof of building material technical field, specifically is the preparation method of a kind of porous concrete mixture and goods thereof.
Background technology
Cellular concrete comes into one's own along with the propelling of energy-saving building technology in recent years as a kind of lightweight, heat preserving and insulating material.Cellular concrete is meant that those inside contain a large amount of uniform distribution, the diameter concrete less than 2 millimeters sealed porosity.At present, cellular concrete mainly contains two classes: a class is a foamed concrete, and an other class is a gas concrete.Foamed concrete system is with cement or add mixing material and porous light-weight material that slurry that water is made forms with the foam mix post-hardening made from foaming agent again.Gas concrete is to utilize chemical process to produce gas in pug and make, and the method that produces gas has the metal-powder of adding, White Cloud Mountain to produce hydrogen or carbonic acid gas with acid-respons, and lime carbonate adds water generates acetylene etc. in addition.The common intensity of traditional this two polyporous materials is all very low, has only usually below the 1MPa, can only be used for some partition wall packing materials, and have defectives such as contract with dry rate is bigger.
In recent years, the researchist has carried out number of research projects in this respect and has developed multiple high performance cellular concrete.Chinese patent CN03104729.7 (publication number: CN1443727, open day: 2003.09.24) described the method that adopts composite gelled material and multiple admixture and fiber composite, prepared the high-strength porous concrete that intensity reaches 15-30MPa; Chinese patent CN200810021256.5 (publication number: CN101328041 and for example, open day: 2008.12.24) described employing flyash, lime, cement, desulfurated plaster and aluminium powder cream etc., adopted special prepared to go out the high-performance cellular concrete of low-shrinkage as starting material; Chinese patent CN200610085717.6 (publication number: CN1884181A, open day: 2006.12.27) described by adopting a certain proportion of hydrogen peroxide liquid to reduce cost to replace aluminium powder as beating agent and foaming agent.Yet, all kinds of cellular concretes from present appearance, the gelling material that adopts substantially all is a silicate cement, has all adopted specific air entrapment agent or air to realize the porousness of inside concrete simultaneously, has increased the cost of cellular concrete so to a certain extent; It is bigger to exist contract with dry rate on the performance, and early strength is on the low side and defective such as weather resistance deviation.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the preparation method of a kind of porous concrete mixture and goods thereof is provided.The present invention can be used for the light porous concrete product of plant produced, also be used in the working-yard and directly pour into a mould the wallboard of formation heat insulating, roof heat-insulating shield etc., the cellular concrete of the present invention preparation has the early strength height, surfacing, hard, do not shrink, indeformable, waterproof, high temperature resistant, internal void is evenly distributed and be advantages such as sealing is not communicated with mutually.
The present invention is achieved by the following technical solutions:
Porous concrete mixture involved in the present invention, its component and weight percent are:
Primary ammonium phosphate 7.5%～30%
Magnesium oxide powder 2.45%～9.8%
Flyash 60%～90%
Transfer gel material 0.05%～0.2%.
Described primary ammonium phosphate is Powdered crystal, its grain diameter＜100um.
Described magnesium oxide powder was a burned magnesium oxide, and its purity is greater than 80%, and the grain diameter scope is 2um～100um.
Described flyash is a kind of in II level flyash, III level flyash or the high-calcium fly ass.
Described accent gel material is a kind of in boric acid, borax or the citric acid.
Described accent gel material is a borax.
The preparation method of porous concrete mixture goods involved in the present invention,
Comprise the steps:
1. porous concrete mixture being put into stirrer stirs;
2. add the mixing water that weight is porous concrete mixture 25%～50%, fully stir, form slip;
3. then slip casting is gone into die for molding, curing and demolding and the light concrete product that cuts into desired size.
Described slip can directly be poured into the attic storey flooring of buildings, becomes light porous concrete roof heat-insulating shield after the curing.
Described slip is pourable to be gone into to have laid in the concrete slab mould that steel props up, and curing and demolding is made light porous concrete panel prefabricated component.
The present invention utilizes primary ammonium phosphate and magnesium oxide and flyash generation fast chemical reaction, produces micro bubble and is uniformly distributed in inside concrete.When using at the construction field (site), mixing water according to prepared cellular concrete intensity and apparent density requirement adding dry powder weight 25%～50%, fully stir and form distributed slurry, then slip casting is gone into die for molding, curing and demolding and the light concrete product that cuts into desired size.
The present invention has broken the porous light concrete and can only produce cast and need the specific production unit and the restriction of processing requirement in factory, can be under any conditions and environment casting and constructing, the form of product can comprise building block, wallboard prefabricated component, roof heat-insulating shield etc.; Porous light concrete of the present invention has fast demoulding, and demould time can be finished in 30 minutes, and high-strength, hardness is big, even pore distribution, and is high temperature resistant, indeformable, do not shrink and excellent properties such as favorable durability.
Embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
Take by weighing each component of porous concrete mixture by weight, wherein primary ammonium phosphate 7.5%, magnesium oxide 2.45%, III level flyash 90%, borax 0.05%, mixture is put into stirrer fully to be stirred, adding weight is the water of mixture 30%, stirs to form even flowable slip in 2 minutes, and uniform slip casting is gone into die for molding, 30 minutes curing and demolding also cut into required size, place under the room temperature maintenance promptly to make light porous concrete segment in 3 days then.This lightweight concrete building block is measured according to GB/T11968-1997 " autoclave aerated concrete building block " standard, and light weight is about 600kg/m 3, intensity is about 8MPa, and the drying shrinkage value is 0.25mm/m, and thermal conductivity is 0.17W/mk, meets relevant criterion.
Embodiment 2
Take by weighing each component of porous concrete mixture by weight, wherein primary ammonium phosphate 30%, magnesium oxide 9.8%, III level flyash 60%, boric acid 1.2% is put into stirrer with mixture and is fully stirred, adding weight is the water of mixture 45%, stir and formed even flowable slip in 3 minutes, slip directly is poured into the attic storey flooring of buildings, become the light weight concrete roof hot plate of determining after the curing.After tested, meet standard light weight and intensity and heat transfer coefficient requirement in the industry.
Embodiment 3
Take by weighing primary ammonium phosphate 18.75% by weight, magnesium oxide 6.125%, III level flyash 75%, borax 0.125%, mixture is put into stirrer fully stir, adding weight is the water of mixture 25%, stirs to form even flowable slip in 2 minutes, slip directly is poured into laid in the concrete mold that steel props up, cure and demold was made light weight concrete wallboard prefabricated component in 35 minutes.After tested, the standard light weight and the intensity that meet GB 15762-1995 " autoclaved aerated concrete slab ".
Embodiment 4
Take by weighing primary ammonium phosphate 15% by weight, magnesium oxide 4.9%, III level flyash 80%, borax 0.1% is put into stirrer with mixture and is fully stirred, and adding weight is the water of mixture 50%, stir and formed even flowable slip in 3 minutes, uniform slip casting is gone into die for molding, and 45 minutes curing and demolding also cut into required size, place under the room temperature maintenance promptly to make light porous concrete segment in 3 days then.This lightweight concrete building block is measured according to GB/T11968-1997 " autoclave aerated concrete building block " standard, and light weight is about 300kg/m 3, intensity is about 2MPa, and the drying shrinkage value is less than 0.3mm/m, and thermal conductivity is 0.08W/mk, meets relevant criterion.

Claims (9)

1, a kind of porous concrete mixture is characterized in that, component and weight percent are:
Primary ammonium phosphate 7.5%～30%
Magnesium oxide powder 2.45%～9.8%
Flyash 60%～90%
Transfer gel material 0.05%～0.2%.
2, porous concrete mixture according to claim 1 is characterized in that, described primary ammonium phosphate is Powdered crystal, its grain diameter＜100um.
3, porous concrete mixture according to claim 1 is characterized in that, described magnesium oxide powder was a burned magnesium oxide, and its purity is greater than 80%, and the grain diameter scope is 2um～100um.
4, porous concrete mixture according to claim 1 is characterized in that, described flyash is a kind of in II level flyash, III level flyash or the high-calcium fly ass.
5, porous concrete mixture according to claim 1 is characterized in that, described accent gel material is a kind of in boric acid, borax or the citric acid.
6, porous concrete mixture according to claim 5 is characterized in that, described accent gel material is a borax.
7, a kind of preparation method of porous concrete mixture goods as claimed in claim 1 is characterized in that, comprises the steps:
1. porous concrete mixture being put into stirrer stirs;
2. add the mixing water that weight is porous concrete mixture 25%～50%, fully stir, form slip;
3. then slip casting is gone into die for molding, curing and demolding and the light concrete product that cuts into desired size.
8, the preparation method of porous concrete mixture goods according to claim 7 is characterized in that, described slip can directly be poured into the attic storey flooring of buildings, becomes light porous concrete roof heat-insulating shield after the curing.
9, the preparation method of porous concrete mixture goods according to claim 7 is characterized in that, described slip is pourable to be gone into to have laid in the concrete slab mould that steel props up, and curing and demolding is made light porous concrete panel prefabricated component.
CN200910049395A 2009-04-16 2009-04-16 Porous concrete mixture and products and preparation method thereof Withdrawn CN101538167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910049395A CN101538167A (en) 2009-04-16 2009-04-16 Porous concrete mixture and products and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910049395A CN101538167A (en) 2009-04-16 2009-04-16 Porous concrete mixture and products and preparation method thereof

Publications (1)

Publication Number Publication Date
CN101538167A true CN101538167A (en) 2009-09-23

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Application Number Title Priority Date Filing Date
CN200910049395A Withdrawn CN101538167A (en) 2009-04-16 2009-04-16 Porous concrete mixture and products and preparation method thereof

Country Status (1)

Country Link
CN (1) CN101538167A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102031786A (en) * 2010-11-23 2011-04-27 上海交通大学 Greening vegetation concrete and construction method thereof
CN102627467A (en) * 2012-05-03 2012-08-08 张峥 Porous composite pearlite heat insulating material
CN102643110A (en) * 2012-05-03 2012-08-22 张峥 Preparation method of porous composite pearlstone heat preservation material
CN103571074A (en) * 2012-07-20 2014-02-12 上海微柯力高分子材料有限公司 Production method of fireproof composite material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102031786A (en) * 2010-11-23 2011-04-27 上海交通大学 Greening vegetation concrete and construction method thereof
CN102031786B (en) * 2010-11-23 2012-07-18 上海交通大学 Greening vegetation concrete and construction method thereof
CN102627467A (en) * 2012-05-03 2012-08-08 张峥 Porous composite pearlite heat insulating material
CN102643110A (en) * 2012-05-03 2012-08-22 张峥 Preparation method of porous composite pearlstone heat preservation material
CN102643110B (en) * 2012-05-03 2013-05-01 张峥 Preparation method of porous composite pearlstone heat preservation material
CN102627467B (en) * 2012-05-03 2013-05-15 张峥 Porous composite pearlite heat insulating material
CN103571074A (en) * 2012-07-20 2014-02-12 上海微柯力高分子材料有限公司 Production method of fireproof composite material

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