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WO2008126125A2 - Autoclaved aerated concrete with reduced shrinkage for realising building blocks and/or floors and/or reinforced and not reinforced panels - Google Patents

Autoclaved aerated concrete with reduced shrinkage for realising building blocks and/or floors and/or reinforced and not reinforced panels Download PDF

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Publication number
WO2008126125A2
WO2008126125A2 PCT/IT2008/000254 IT2008000254W WO2008126125A2 WO 2008126125 A2 WO2008126125 A2 WO 2008126125A2 IT 2008000254 W IT2008000254 W IT 2008000254W WO 2008126125 A2 WO2008126125 A2 WO 2008126125A2
Authority
WO
WIPO (PCT)
Prior art keywords
cellular concrete
concrete according
autoclaved cellular
fibers
reinforced
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.)
Ceased
Application number
PCT/IT2008/000254
Other languages
French (fr)
Other versions
WO2008126125A3 (en
WO2008126125A8 (en
Inventor
Ulderico Ceccarelli
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2008126125A2 publication Critical patent/WO2008126125A2/en
Publication of WO2008126125A8 publication Critical patent/WO2008126125A8/en
Publication of WO2008126125A3 publication Critical patent/WO2008126125A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • C04B28/18—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
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/02—Selection of the hardening environment
    • C04B40/024—Steam hardening, e.g. in an autoclave
    • 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
    • C04B2111/34—Non-shrinking or non-cracking 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
    • C04B2111/40—Porous or lightweight 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
    • C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to an autoclaved aerated concrete for realizing building blocks and/or floors and/or reinforced panels and not reinforced panels.
  • the invention concerns a concrete of the above kind permitting obtaining better chemical - physical and technological performances, along with remarkably better shrinkage phenomenon's and characterized by better mechanical performances with the same density.
  • concretes are presently employed for building blocks and/or floors and/or reinforced panels and not reinforced panels mixed with different aggregate materials such as inert sands, expanded argil granules, polystyrene granules added to the cement used as alloying substance. It is also known that said concretes are characterized by technologically reduced chemical - physical performances.
  • autoclaved cellular concretes comprising silica sands, cement, gypsum, lime and aluminum dust as additive, having a high shrinkage phenomenon and low mechanical performances.
  • new autoclaved cellular concrete having remarkably advantageous and improving features with respect to the known solutions, particularly as far as chemical composition, handicraft chemical - physical performances, technological performances, mechanical performances, reduced shrinkage and better respect for nature, lower manufacturing costs, thus being remarkably better that the known concretes.
  • new autoclaved cellular concrete suggested according to the present invention is an absolutely advantageous solution under a practical, economic- ecological and biocompatibility point of view.
  • Another object of the present invention is that of providing an ecological and natural concrete, since it is comprised of natural raw materials such as sands, pozzuolana, lime and a very low content of cement.
  • Another object of the present invention is that of employing said autoclaved cellular concrete specifically suitable for manufacturing floors.
  • a further object of the present invention is that of using said concrete for realizing building reinforced and not reinforced panels.
  • an autoclaved cellular concrete - A.C. C comprising: silica sand 50 - 80% pozzuolana 0, 0 - 15% lime 10 - 25% cement 5 - 30%
  • said fibers have a length between 2 and 7 mm, preferably 3 mm.
  • said fibers are preferably glass fibers.
  • the concrete according to the invention comprises retardant additives, in order to prevent explosive phases within the mass during the reaction, particularly oleic acid and triethanolamine, or else, in an amount between 0.1 and 1.5 per thousands.
  • sand will exclusively be silica sand.
  • it will comprise: silica sand 67 % pozzuolana 5 % lime 16 % cement 5 %
  • the use material described as blocks is particularly advantageous since it is obtained a final product with remarkable chemical - physical performances, such as high lightness, optimum mechanical resistance, optimum thermal insulation, high acoustic reduction, excellent fire resistance, not flammable, high vapor permeability, reduced shrinkage, biocompatibility, urban and natural.
  • product according to the invention has remarkable technological performances, such as wood like workability, millimetric handicraft dimensional precision, reduced glue thickness for building application, remarkable assembly simplicity and quickness.
  • Characteristic values of autoclaved cellular concrete according to the invention preferably are the following: dry volumetric mass 450 - 650 kg/m 3 compression resistance 3 - 11 N/mm 2 thermal conductivity 0,09 - 0,20 W/m 0 K phonoabsorbency - thickness value 10 cm 38 - 4O dB R.E.I, - from thickness 10 cm 180 minutes shrinkage 0.008 - 0.002 mm/m.
  • Using the product according to the invention as building material will be particularly advantageous its use for realizing building blocks and/or floors and or reinforced and not reinforced panels having a thickness between 2.5 cm and 40 cm, with a pitch of 2.5 cm or 1.5 cm.
  • products are obtained with a very reduced weight but remarkably resistant, since they are comprised of artificial rock chemically similar to a natural silicate.
  • Another advantage obtained with the product according to the present invention is that of not emitting radiations.
  • Another advantage obtained with the product according to the present invention is that having a high vapor permeability. Still another advantage obtained with the product according to the present invention is that of very reduced shrinkage, lower than 45% than the present shrinkage.
  • Autoclaved cellular concrete according to the present invention is biocompatible, ecological, and natural. It further does not create reactions on human being and does not modify environmental equilibrium, since it does not contain noxious substances.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention concerns an autoclaved cellular concrete A.C.C., comprising: silica sand 50 - 80% pozzuolana 0,0 - 15% lime 10 - 25% cement 5 - 30% A.C.C. dust 0.5 - 4% dust and/or paste aluminum 0.5 - 1.3 %o fibers 0.1 - 4% water 5 - 7% wherein fibers can glass and/or carbon fibers, or another kind of fibers, such as cellulose fibers, steel fibers, ecc.

Description

AUTOCLAVED AERATED CONCRETE WITH REDUCED SHRINKAGE FOR REALISING BUILDING BLOCKS AND/OR FLOORS AND/OR REINFORCED AND NOT REINFORCED
PANELS
The present invention relates to an autoclaved aerated concrete for realizing building blocks and/or floors and/or reinforced panels and not reinforced panels.
More particularly, the invention concerns a concrete of the above kind permitting obtaining better chemical - physical and technological performances, along with remarkably better shrinkage phenomenon's and characterized by better mechanical performances with the same density.
As it is well known, concretes are presently employed for building blocks and/or floors and/or reinforced panels and not reinforced panels mixed with different aggregate materials such as inert sands, expanded argil granules, polystyrene granules added to the cement used as alloying substance. It is also known that said concretes are characterized by technologically reduced chemical - physical performances.
Generally speaking, they are heavy building materials, requiring a large amount of raw materials, low conductivity values, reduced vapor permeability, not easily workable, requiring the use of large mortar thicknesses for application during manufacturing, as well as a certain skill for assembling the same.
Furthermore, high percentage of cement that is necessary in said concrete mixture makes obtained handiworks not convenient under an ecologic point of view and not natural, taking into consideration particular cement manufacturing process requiring high consumption of energy and consequent high emission of CO2 into the atmosphere.
As an alternative, for realization of building blocks and/or floors and/or reinforced panels and not reinforced panels autoclaved cellular concretes are used, comprising silica sands, cement, gypsum, lime and aluminum dust as additive, having a high shrinkage phenomenon and low mechanical performances.
In view of the above, the Applicant has studied a new composition for autoclaved cellular concrete having remarkably advantageous and improving features with respect to the known solutions, particularly as far as chemical composition, handicraft chemical - physical performances, technological performances, mechanical performances, reduced shrinkage and better respect for nature, lower manufacturing costs, thus being remarkably better that the known concretes. In other words, new autoclaved cellular concrete suggested according to the present invention is an absolutely advantageous solution under a practical, economic- ecological and biocompatibility point of view.
Another object of the present invention is that of providing an ecologic and natural concrete, since it is comprised of natural raw materials such as sands, pozzuolana, lime and a very low content of cement.
Another object of the present invention is that of employing said autoclaved cellular concrete specifically suitable for manufacturing floors.
A further object of the present invention is that of using said concrete for realizing building reinforced and not reinforced panels.
It is therefore specific object of the present invention an autoclaved cellular concrete - A.C. C, comprising: silica sand 50 - 80% pozzuolana 0, 0 - 15% lime 10 - 25% cement 5 - 30%
A.C.C. dust 0.5 - 4% dust and/or paste aluminum 0.5 - 1.3 %o fibers 0.1 - 4% water 5 - 7% wherein fibers can glass and/or carbon fibers, or another kind of fibers, such as cellulose fibers, steel fibers, ecc.
Preferably, according to the invention, said fibers have a length between 2 and 7 mm, preferably 3 mm. According to the invention, said fibers are preferably glass fibers.
In a preferred embodiment of the concrete according to the invention, it comprises retardant additives, in order to prevent explosive phases within the mass during the reaction, particularly oleic acid and triethanolamine, or else, in an amount between 0.1 and 1.5 per thousands.
Particularly, sand will exclusively be silica sand. In a preferred embodiment of concrete according to the invention, it will comprise: silica sand 67 % pozzuolana 5 % lime 16 % cement 5 %
A.C.C. dust 1.3 % dust and/or paste aluminum about 1 %o oleic acid, triethanolamine or else about 1.3 %o water quant suff. at 100%
The use material described as blocks is particularly advantageous since it is obtained a final product with remarkable chemical - physical performances, such as high lightness, optimum mechanical resistance, optimum thermal insulation, high acoustic reduction, excellent fire resistance, not flammable, high vapor permeability, reduced shrinkage, biocompatibility, ecologic and natural.
Furthermore, product according to the invention has remarkable technological performances, such as wood like workability, millimetric handicraft dimensional precision, reduced glue thickness for building application, remarkable assembly simplicity and quickness.
Moreover, with respect to building materials presently used it permits a reduction of building costs.
Characteristic values of autoclaved cellular concrete according to the invention preferably are the following: dry volumetric mass 450 - 650 kg/m3 compression resistance 3 - 11 N/mm2 thermal conductivity 0,09 - 0,20 W/m 0K phonoabsorbency - thickness value 10 cm 38 - 4O dB R.E.I, - from thickness 10 cm 180 minutes shrinkage 0.008 - 0.002 mm/m.
Using the product according to the invention as building material will be particularly advantageous its use for realizing building blocks and/or floors and or reinforced and not reinforced panels having a thickness between 2.5 cm and 40 cm, with a pitch of 2.5 cm or 1.5 cm. Thus, products are obtained with a very reduced weight but remarkably resistant, since they are comprised of artificial rock chemically similar to a natural silicate. Another advantage obtained with the product according to the present invention is that of not emitting radiations.
Another advantage obtained with the product according to the present invention is that having a high vapor permeability. Still another advantage obtained with the product according to the present invention is that of very reduced shrinkage, lower than 45% than the present shrinkage.
Autoclaved cellular concrete according to the present invention is biocompatible, ecologic, and natural. It further does not create reactions on human being and does not modify environmental equilibrium, since it does not contain noxious substances.
The present invention has been described for illustrative but not limitative purposes, according to its preferred embodiments, but it is to be understood that modifications and/or changes can be introduced by those skilled in the art without departing from the relevant scope as defined in the enclosed claims.

Claims

1. Autoclaved cellular concrete, characterized in that it is comprised of: silica sand * 50 - 80% pozzuolana 0.0 - 15% lime 10 - 25% cement 5 - 30%
A.C.C. dust 0.5 - 4% dust and/or paste aluminum 0.5 - 1.3 %o fibers 0.1 - 4% water 5 - 7%.
2. Autoclaved cellular concrete according to claim 1 , characterized in that said fibres are glass and/or carbon fibres, or another kind of fibers, such as cellulose fibres, steel fibres, ecc.
3. Autoclaved cellular concrete according to claim 2, characterized in that said fibers are glass fibers.
4. Autoclaved cellular concrete according to one of the preceding claims, characterized in that said fibres have a length between 2 and 7 mm, preferably 3 mm.
5. Autoclaved cellular concrete according to one of the preceding claims, characterized in that it comprises retardant additives, in order to prevent explosive phases within the mass during the reaction in an amount between 0.1 and 1.5 per thousands.
6. Autoclaved cellular concrete according to claim 5, characterized in that said retardant additives are oleic acid and triethanolamine, or else,
7. Autoclaved cellular concrete according to one of the preceding claims, characterized in that it comprises: silica sand 67 % pozzuolana 5 % lime 16 % cement 5 %
A.C.C. dust 1.3 % dust and/or paste aluminum about 1 %o oleic acid, triethanolamine or else about 1.3 %o water quant, suff. at 100%
8. Autoclaved cellular concrete according to one of the preceding claims, characterized in that it has the following ccharacteristic values: dry volumetric mass 450 - 650 kg/m3 compression resistance 3 - 11 N/mm2 thermal conductivity 0,09 - 0,20 W/m 0K phonoabsorbency - thickness value 10 cm 38 - 40 dB R.E.I, - from thickness 10 cm 180 minutes shrinkage 0.008 - 0.002 mm/m.
9. Autoclaved cellular concrete according to one of the preceding claims, characterized in that it is used for realising building blocks.
10. Autoclaved cellular concrete according to one of the preceding claims 1 - 8, characterized in that it is used for realising building floors.
11. Autoclaved cellular concrete according to one of the preceding claims 1 - 8, characterized in that it is used for realising building reinforced and not reinforced panels.
12. Autoclaved cellular concrete according to each one of the preceding claims, substantially as illustrated and described.
PCT/IT2008/000254 2007-04-16 2008-04-15 Autoclaved aerated concrete with reduced shrinkage for realising building blocks and/or floors and/or reinforced and not reinforced panels Ceased WO2008126125A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000212A ITRM20070212A1 (en) 2007-04-16 2007-04-16 AUTOCLAVED CELLULAR CONCRETE WITH REDUCED PHENOMENON OF WITHDRAWAL FOR THE REALIZATION OF BLOCKS AND / OR FLOOR AND / OR REINFORCED AND UNRESTED BUILDING PANELS.
ITRM2007A000212 2007-04-16

Publications (3)

Publication Number Publication Date
WO2008126125A2 true WO2008126125A2 (en) 2008-10-23
WO2008126125A8 WO2008126125A8 (en) 2008-12-31
WO2008126125A3 WO2008126125A3 (en) 2009-04-02

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PCT/IT2008/000254 Ceased WO2008126125A2 (en) 2007-04-16 2008-04-15 Autoclaved aerated concrete with reduced shrinkage for realising building blocks and/or floors and/or reinforced and not reinforced panels

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Country Link
IT (1) ITRM20070212A1 (en)
WO (1) WO2008126125A2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101041094B1 (en) 2010-10-18 2011-06-14 태성건설 주식회사 Eco-friendly building material composition manufacturing method
EP2602234A1 (en) 2011-12-07 2013-06-12 Vilnius Gediminas Technical University Method for manufacturing of products from autoclaved aerated concrete and composition of autoclaved aerated concrete
EP2418187B1 (en) 2010-08-12 2015-04-08 Evgeniy Nikolaevich Yastremskiy Dry mixture for manufacturing cellular fibro concrete and method therefor
CN110028283A (en) * 2019-05-21 2019-07-19 皖西学院 A kind of preparation method of regenerated fiber composite active mineral material enhancing regeneration concrete
CN111302720A (en) * 2020-04-16 2020-06-19 黄通 Concrete bundle superposed thermal insulation material and preparation method thereof
CN113860807A (en) * 2021-10-22 2021-12-31 山东居欢新型材料科技有限公司 Building material produced by waste autoclaved aerated concrete product

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5614469A (en) * 1979-07-16 1981-02-12 Sumitomo Metal Mining Co Antishock steammcured lightweight foamed concrete
JPS60191070A (en) * 1984-03-09 1985-09-28 住友金属鉱山株式会社 Manufacture of alc
JPH0665637B2 (en) * 1985-02-01 1994-08-24 旭化成工業株式会社 Method for producing lightweight foam concrete body
JP2001302327A (en) * 2000-04-18 2001-10-31 Sumitomo Kinzoku Kozan Siporex Kk Method for producing ALC with excellent water repellency

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2418187B1 (en) 2010-08-12 2015-04-08 Evgeniy Nikolaevich Yastremskiy Dry mixture for manufacturing cellular fibro concrete and method therefor
KR101041094B1 (en) 2010-10-18 2011-06-14 태성건설 주식회사 Eco-friendly building material composition manufacturing method
EP2602234A1 (en) 2011-12-07 2013-06-12 Vilnius Gediminas Technical University Method for manufacturing of products from autoclaved aerated concrete and composition of autoclaved aerated concrete
LT5966B (en) 2011-12-07 2013-10-25 Vilniaus Gedimino technikos universitetas Method of production of autoclaved porous concrete and composition of porous concrete
CN110028283A (en) * 2019-05-21 2019-07-19 皖西学院 A kind of preparation method of regenerated fiber composite active mineral material enhancing regeneration concrete
CN111302720A (en) * 2020-04-16 2020-06-19 黄通 Concrete bundle superposed thermal insulation material and preparation method thereof
CN113860807A (en) * 2021-10-22 2021-12-31 山东居欢新型材料科技有限公司 Building material produced by waste autoclaved aerated concrete product

Also Published As

Publication number Publication date
WO2008126125A3 (en) 2009-04-02
ITRM20070212A1 (en) 2008-10-17
WO2008126125A8 (en) 2008-12-31

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