US20080236069A1 - Lightweight concrete panel - Google Patents

Lightweight concrete panel Download PDF

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Publication number
US20080236069A1
US20080236069A1 US11/731,231 US73123107A US2008236069A1 US 20080236069 A1 US20080236069 A1 US 20080236069A1 US 73123107 A US73123107 A US 73123107A US 2008236069 A1 US2008236069 A1 US 2008236069A1
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United States
Prior art keywords
concrete
panel
per cubic
layer
cast
Prior art date
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Abandoned
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US11/731,231
Inventor
Jason Hensley
Thomas Kuckhahn
Richard Mantel
George Miks
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Fabcon Inc
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Individual
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Priority to US11/731,231 priority Critical patent/US20080236069A1/en
Assigned to FABCON, INC. reassignment FABCON, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HENSLEY, JASON, KUCKHAHN, THOMAS, MANTEL, RICHARD, MIKS, GEORGE
Publication of US20080236069A1 publication Critical patent/US20080236069A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
    • E04C2/044—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres of concrete
    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
    • E04C2/2885—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material with the insulating material being completely surrounded by, or embedded in, a stone-like material, e.g. the insulating material being discontinuous
    • 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
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
    • 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

Definitions

  • This invention relates to precast concrete panels, and in particular to lightweight concrete panels.
  • Concrete panels refers to elongated panels of cast concrete, with or without prestressing cables.
  • the concrete panels may be solid concrete or a combination of lower and upper concrete layers surrounding an insulating layer. In all cases, due to the weight of concrete, concrete wall panels tend to be quite heavy.
  • the invention provides concrete panels with a markedly decreased weight by dramatically increasing the air entrainment without decreasing the performance characteristics of the concrete panels beyond engineering specification guidelines.
  • the inventors have found that concrete panels may be produced having excellent strength while decreasing weight by entraining air in the concrete between about 7 to about 11 percent. This results in wet concrete weights of between about 132 to about 140 pounds per cubic foot compared to conventional concrete for concrete panels of about 147 pounds per cubic foot.
  • FIG. 1 is a cross-sectional view of a typical modem concrete plank formed of several layers, with prestressed cables and insulation.
  • a typical modem cast concrete panel 10 is shown in FIG. 1 . It may include a lower layer of concrete 12 , an intermediate insulation layer 14 and an upper top concrete layer 16 . To reduce weight and provide other advantages, one or more foam billets 30 may be within the panel as shown. These billets are shown and described in U.S. Pat. No. 6,955,014, the disclosure of which is incorporated herein by reference. Note also that such panels often have reinforcing metal such as prestressing cables 22 .
  • the inventors have found that increasing air content to 9% ⁇ 2% results in a reduction in wet weight to 136 ⁇ 4. Surprisingly, this decrease in wet weight and increased air entrainment resulted in excellent concrete panels that have the required compressive strengths after cure and are workable as shown by the slump characteristics.
  • the concrete with the increased air content specified may be used in structural concrete panels in any or all of the layers, as desired, to gain the decrease of weight.
  • Cast concrete panels made according to the invention may save over 10 pounds per cubic foot in shipping cost since the concrete may typically be 136 pounds per cubic foot versus conventional concrete in concrete panels of about 147 pounds per cubic foot.
  • the additional entrained air decreases the concrete weight. Under the parameters of the invention, this results in concrete having acceptable performance characteristics both in handling and in the final concrete panels.
  • This invention works for both fixed bed and moving bed casting operations.
  • concrete panels refers to concrete cast at a plant using a rolling bed or fixed bed method. On-site pours of concrete do not involve shipping concerns and do not realize the benefits of saved weight.

Abstract

A lightweight cast concrete panel including concrete having a wet weight of between about 132 to about 140 pounds per cubic foot, and air content of between about 7 to about 11 percent.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
  • Not Applicable.
    • BACKGROUND OF THE INVENTION
  • This invention relates to precast concrete panels, and in particular to lightweight concrete panels.
  • Concrete panels, as used herein, refers to elongated panels of cast concrete, with or without prestressing cables. The concrete panels may be solid concrete or a combination of lower and upper concrete layers surrounding an insulating layer. In all cases, due to the weight of concrete, concrete wall panels tend to be quite heavy.
  • Additional weight increases the product cost due to added shipping charges. Attempts to decrease the weight of the concrete panels have focused on decreasing the volume of concrete within a given panel. This has involved creating a series of empty cores within the panel to newer techniques of using insulating foam blocks to both decrease weight and increase the insulating R-value of the concrete plank.
  • The art described in this section is not intended to constitute an admission that any patent, publication or other information referred to herein is “prior art” with respect to this invention, unless specifically designated as such. In addition, this section should not be construed to mean that a search has been made or that no other pertinent information as defined in 37 C.F.R. § 1.56(a) exists.
    • BRIEF SUMMARY OF THE INVENTION
  • The invention provides concrete panels with a markedly decreased weight by dramatically increasing the air entrainment without decreasing the performance characteristics of the concrete panels beyond engineering specification guidelines. The inventors have found that concrete panels may be produced having excellent strength while decreasing weight by entraining air in the concrete between about 7 to about 11 percent. This results in wet concrete weights of between about 132 to about 140 pounds per cubic foot compared to conventional concrete for concrete panels of about 147 pounds per cubic foot.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • A detailed description of the invention is hereafter described with specific reference being made to the drawings in which:
  • FIG. 1 is a cross-sectional view of a typical modem concrete plank formed of several layers, with prestressed cables and insulation.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • It has been found that concrete panels may be manufactured with acceptable strength and handling characteristics while decreasing the weight of the panels. Decreased weight results in lower shipping costs as well as lower manufacturing cost due to a reduction in concrete used. A typical modem cast concrete panel 10 is shown in FIG. 1. It may include a lower layer of concrete 12, an intermediate insulation layer 14 and an upper top concrete layer 16. To reduce weight and provide other advantages, one or more foam billets 30 may be within the panel as shown. These billets are shown and described in U.S. Pat. No. 6,955,014, the disclosure of which is incorporated herein by reference. Note also that such panels often have reinforcing metal such as prestressing cables 22.
  • The following tables show data on testing done with a variety of concrete mixes in which air content was varied. In Table A, “Normal” refers to the usual mix of concrete in which entrained air content is about 4.5%, the unit weight while wet in pounds per cubic foot was 147.0, the slump was 9.00 inches and the compressive strength after a heat of “sure cure” was 4500 psi, at 7 days was 5950 psi and at 28 days was 7000 psi.
  • The inventors have found that increasing air content to 9%±2% results in a reduction in wet weight to 136±4. Surprisingly, this decrease in wet weight and increased air entrainment resulted in excellent concrete panels that have the required compressive strengths after cure and are workable as shown by the slump characteristics. The concrete with the increased air content specified may be used in structural concrete panels in any or all of the layers, as desired, to gain the decrease of weight.
  • TABLE A
    Normal A B C D E F G
    Unit Weight - wet 147.0 142.2 142.2 133.8 133.8 132.2 139.2 142.4
    (lbs/ft3) Observed
    Air Content (%) 4.5% 6.5% 7.5% 12.0% 10.5% 12.5% 9.0% 7.0%
    Slump (in) 9.00 8.25 5.50 8.50 5.75 8.00 3 9.5
    fc-sure cure (psi) 4500 5768 5889 3832 4524 3007 7157 6772
    (8–10 hrs)
    fc-7-day (psi) 5950 9115 9436 6889 8525 7373 9470 8932
    fc-28-day (psi) 7000 10624 10977 7650 11923 10735 12115 11750
  • TABLE B
    H I J K L M N O
    Unit Weight - wet 143.2 137.2 130.8 132.6 135.2 138.0 136.8 134.4
    (lbs/ft3) Observed
    Air Content (%) 7.5% 10.0% 14.0% 12.5% 11.4% 9.8% 8.2% 11.4%
    Slump (in) 9 9.5 spread 8.0 8.5 8.0 spread 9.25
    fc-sure cure (psi) 6215 1981 1937 1806 4487 6708 3764 5658
    (8–10 hrs)
    fc-7-day (psi) 9705 7315 5033 6498 7465 10348 5924 8684
    fc-28-day (psi) 12758 9770 6124 8275 9377 12363 7569 11297
  • TABLE C
    P Q R S T U V W
    Unit Weight - wet 134.0 135.8 132.8 138.6 135.8 134.4 136.2 136.6
    (lbs/ft3) Observed
    Air Content (%) 11.5% 10.0% 11.8% 9.4% 10.6% 11.0% 9.8% 10.0%
    Slump (in) 8.5 8.5 9.5 8.5 8.0 9.0 8.75 8.0
    fc-sure cure (psi) 5631 5694 4455 6625 5853 4893 5688 5462
    (8–10 hrs)
    fc-7-day (psi) 9253 9486 6498 9684 9068 7657 9200 8601
    fc-28-day (psi) 11211 11106 8289 12350 11704 10300 10686 10189
  • TABLE D
    X Y Z AA AB AC AD AE
    Unit Weight - wet 137.4 138.2 139.8 137.4 131.4 130.8 136.4 136.6
    (lbs/ft3) Observed
    Air Content (%) 9.5% 10.0% 8.5% 10.0% 12.5% 12.8% 10.2% 9.5%
    Slump (in) 8.5 9 7.5 8 7.75 18.0 8.0 8.0
    fc-sure cure (psi) 6308 5662 4947 4000 5375 5383 4753 4898
    (8–10 hrs)
    fc-7-day (psi) 10403 10998 10019 9759 8271 8873 8084 9004
    fc-28-day (psi) 11215 11242 10064 9824 9890 8561 9984 11418
  • Cast concrete panels made according to the invention may save over 10 pounds per cubic foot in shipping cost since the concrete may typically be 136 pounds per cubic foot versus conventional concrete in concrete panels of about 147 pounds per cubic foot. The additional entrained air decreases the concrete weight. Under the parameters of the invention, this results in concrete having acceptable performance characteristics both in handling and in the final concrete panels. This invention works for both fixed bed and moving bed casting operations. As used herein, concrete panels refers to concrete cast at a plant using a rolling bed or fixed bed method. On-site pours of concrete do not involve shipping concerns and do not realize the benefits of saved weight.
  • While this invention may be embodied in many different forms, there are shown in the drawings and described in detail herein specific preferred embodiments of the invention. The present disclosure is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiments illustrated.
  • This completes the description of the preferred and alternate embodiments of the invention. Those skilled in the art may recognize other equivalents to the specific embodiment described herein which equivalents are intended to be encompassed by the claims attached hereto.

Claims (5)

1. A concrete panel, concrete in said panel having entrained air between about 7 and about 11%, said concrete having a wet weight of between 2144 to 2242 kilograms per cubic meter (132 and 140 pounds per cubic foot).
2. A concrete panel including prestressed cables throughout the concrete panel, concrete in said panel having entrained air between about 7 and about 11%, said concrete having a wet weight of between 2144 to 2242 kilograms per cubic meter (132 and 140 pounds per cubic foot).
3. A cast concrete panel having an upper and a lower surface and at least one layer of reinforced concrete, at least one layer of said concrete in said panel having entrained air between about 7 and about 11%, said concrete having a wet weight of between 2144 to 2242 kilograms per cubic meter (132 and 140 pounds per cubic foot).
4. The cast concrete panel of claim 3 further including a plurality of foam billets therewithin.
5. The cast concrete panel of claim 4 wherein said concrete panel is cast with a lower concrete layer and an upper concrete layer, said lower concrete layer encasing said foam billets, one of said concrete layers having a different air entrainment percentage than said other concrete layer.
US11/731,231 2007-03-30 2007-03-30 Lightweight concrete panel Abandoned US20080236069A1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150204067A1 (en) * 2012-06-29 2015-07-23 Wolfgang Adolf Binder Building system and method
WO2016051258A1 (en) * 2014-10-02 2016-04-07 Lafarge Prefabricated monobloc panel
US20170218627A1 (en) * 2011-03-18 2017-08-03 Peter Mervyn Neil Composite wall panel, wall system and components thereof, and a method of construction thereof
WO2017178206A1 (en) * 2016-04-11 2017-10-19 Hans Moser Composite component having ultra-high-strength concrete for a building structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523343A (en) * 1967-12-05 1970-08-11 Span Deck Inc System for the production of cast concrete members
US3773604A (en) * 1971-02-10 1973-11-20 Balsa Ecuador Lumber Corp Structural light-weight panel of high strength,having theral insulation properties and enclosures formed thereby
US4041669A (en) * 1975-02-12 1977-08-16 Rauenhorst Gerald A Hollow-core concrete slabs
US4094805A (en) * 1976-09-23 1978-06-13 Charles Nyberg Hansen Protecting pavement or concrete materials against the effects of the destructive action of freezing and thawing of water and or brine solutions
US4128975A (en) * 1975-09-05 1978-12-12 Solai Vignola Di Fabiani Orlando E C. - Societa In Nome Collettivo Prefabricated building components of expanded material and cement
US4234634A (en) * 1977-08-23 1980-11-18 Enrico Longinotti Prefabrication system for building walls
US4328145A (en) * 1979-10-26 1982-05-04 American Admixtures And Chemicals Corporation Additive for air-entrained super plasticized concrete, concrete produced thereby and method of producing air-entrained super plasticized concrete
US4416842A (en) * 1981-03-02 1983-11-22 Fabcon, Inc. Directed cracking in concrete panel manufacture
US4712349A (en) * 1984-12-24 1987-12-15 The Dow Chemical Company Protected membrane roof system for high traffic roof areas
US4913741A (en) * 1989-06-29 1990-04-03 Solvay Construction Materials, Inc. Chemical additive for hydraulic cement mixes
US4948429A (en) * 1989-06-14 1990-08-14 W. R. Grace & Co.-Conn. Method of controlling air entrainment in concrete compositions
US5398470A (en) * 1991-04-23 1995-03-21 Avi Alpenlandische Veredelungs-Industrie Gesellschaft M.B.H. Reinforcement body for a floor slab
US5797238A (en) * 1993-06-18 1998-08-25 Delcon Ab Concrete Development Method of producing concrete structures with a surface protection and a concrete structure produced in accordance with the method
US6457288B2 (en) * 2000-02-18 2002-10-01 Sergio Zambelli Prefabricated concrete panel for building floors in civil or industrial structures
US6460213B1 (en) * 2000-08-07 2002-10-08 Concrete Precast Products Corp. Precast concrete structure having light weight encapsulated cores
US6485560B1 (en) * 1999-04-28 2002-11-26 The Trustees Of Princeton University Methods of protecting concrete from freeze damage
US20030115822A1 (en) * 2001-12-20 2003-06-26 Michael Lejeune Method for producing unique holow core concrete panels
US6609340B2 (en) * 1998-01-16 2003-08-26 Eco-Block, Llc Concrete structures and methods of forming the same using extenders
US6705055B2 (en) * 1993-06-02 2004-03-16 Evg Entwicklungs-U. Verwertungs-Gesellschaft Mbh Building element
US6718712B1 (en) * 1999-03-31 2004-04-13 Mark David Heath Structural panel and method of fabrication
US6875266B1 (en) * 1999-04-09 2005-04-05 James Hardie Research Pty Limited Concrete formulation
US6955014B2 (en) * 2002-11-07 2005-10-18 Fabcon, Inc. Insulated concrete cast panels with voids in billits
US20060243169A1 (en) * 2003-01-15 2006-11-02 Mak Swee L Cementitious products

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523343A (en) * 1967-12-05 1970-08-11 Span Deck Inc System for the production of cast concrete members
US3773604A (en) * 1971-02-10 1973-11-20 Balsa Ecuador Lumber Corp Structural light-weight panel of high strength,having theral insulation properties and enclosures formed thereby
US4041669A (en) * 1975-02-12 1977-08-16 Rauenhorst Gerald A Hollow-core concrete slabs
US4128975A (en) * 1975-09-05 1978-12-12 Solai Vignola Di Fabiani Orlando E C. - Societa In Nome Collettivo Prefabricated building components of expanded material and cement
US4094805A (en) * 1976-09-23 1978-06-13 Charles Nyberg Hansen Protecting pavement or concrete materials against the effects of the destructive action of freezing and thawing of water and or brine solutions
US4234634A (en) * 1977-08-23 1980-11-18 Enrico Longinotti Prefabrication system for building walls
US4328145A (en) * 1979-10-26 1982-05-04 American Admixtures And Chemicals Corporation Additive for air-entrained super plasticized concrete, concrete produced thereby and method of producing air-entrained super plasticized concrete
US4416842A (en) * 1981-03-02 1983-11-22 Fabcon, Inc. Directed cracking in concrete panel manufacture
US4712349A (en) * 1984-12-24 1987-12-15 The Dow Chemical Company Protected membrane roof system for high traffic roof areas
US4948429A (en) * 1989-06-14 1990-08-14 W. R. Grace & Co.-Conn. Method of controlling air entrainment in concrete compositions
US4913741A (en) * 1989-06-29 1990-04-03 Solvay Construction Materials, Inc. Chemical additive for hydraulic cement mixes
US5398470A (en) * 1991-04-23 1995-03-21 Avi Alpenlandische Veredelungs-Industrie Gesellschaft M.B.H. Reinforcement body for a floor slab
US6705055B2 (en) * 1993-06-02 2004-03-16 Evg Entwicklungs-U. Verwertungs-Gesellschaft Mbh Building element
US5797238A (en) * 1993-06-18 1998-08-25 Delcon Ab Concrete Development Method of producing concrete structures with a surface protection and a concrete structure produced in accordance with the method
US6609340B2 (en) * 1998-01-16 2003-08-26 Eco-Block, Llc Concrete structures and methods of forming the same using extenders
US6718712B1 (en) * 1999-03-31 2004-04-13 Mark David Heath Structural panel and method of fabrication
US6875266B1 (en) * 1999-04-09 2005-04-05 James Hardie Research Pty Limited Concrete formulation
US6485560B1 (en) * 1999-04-28 2002-11-26 The Trustees Of Princeton University Methods of protecting concrete from freeze damage
US6457288B2 (en) * 2000-02-18 2002-10-01 Sergio Zambelli Prefabricated concrete panel for building floors in civil or industrial structures
US6460213B1 (en) * 2000-08-07 2002-10-08 Concrete Precast Products Corp. Precast concrete structure having light weight encapsulated cores
US20030115822A1 (en) * 2001-12-20 2003-06-26 Michael Lejeune Method for producing unique holow core concrete panels
US6955014B2 (en) * 2002-11-07 2005-10-18 Fabcon, Inc. Insulated concrete cast panels with voids in billits
US20060243169A1 (en) * 2003-01-15 2006-11-02 Mak Swee L Cementitious products

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170218627A1 (en) * 2011-03-18 2017-08-03 Peter Mervyn Neil Composite wall panel, wall system and components thereof, and a method of construction thereof
US9951519B2 (en) * 2011-03-18 2018-04-24 Peter Mervyn Neil Composite wall panel, wall system and components thereof, and a method of construction thereof
US20150204067A1 (en) * 2012-06-29 2015-07-23 Wolfgang Adolf Binder Building system and method
WO2016051258A1 (en) * 2014-10-02 2016-04-07 Lafarge Prefabricated monobloc panel
FR3026760A1 (en) * 2014-10-02 2016-04-08 Lafarge Sa PREFABRICATED MONOBLOCK PANEL
WO2017178206A1 (en) * 2016-04-11 2017-10-19 Hans Moser Composite component having ultra-high-strength concrete for a building structure

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Owner name: FABCON, INC., MINNESOTA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HENSLEY, JASON;KUCKHAHN, THOMAS;MANTEL, RICHARD;AND OTHERS;REEL/FRAME:019196/0947

Effective date: 20070327

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION