EP2861805A1 - Élément de construction et procédé de fabrication d'un tel élément de construction - Google Patents

Élément de construction et procédé de fabrication d'un tel élément de construction

Info

Publication number
EP2861805A1
EP2861805A1 EP20130806191 EP13806191A EP2861805A1 EP 2861805 A1 EP2861805 A1 EP 2861805A1 EP 20130806191 EP20130806191 EP 20130806191 EP 13806191 A EP13806191 A EP 13806191A EP 2861805 A1 EP2861805 A1 EP 2861805A1
Authority
EP
European Patent Office
Prior art keywords
construction element
pipe
tensioning member
tensioning
construction
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Withdrawn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
EP20130806191
Other languages
German (de)
English (en)
Other versions
EP2861805A4 (fr
Inventor
Markus Andersson
Martin Persson
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.)
MMAP Holding AB
Original Assignee
MMAP Holding AB
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 MMAP Holding AB filed Critical MMAP Holding AB
Publication of EP2861805A1 publication Critical patent/EP2861805A1/fr
Publication of EP2861805A4 publication Critical patent/EP2861805A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/046—Post treatment to obtain pre-stressed articles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E04B5/043—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement having elongated hollow cores
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/10—Ducts

Definitions

  • the present invention relates generally to a construction element in concrete, which for example may be used as a prefabricated floor element.
  • the invention further relates to a method to manufacture such a construction element.
  • Hollow concrete blocks are today manufactured for the construction industry by a few manufacturers in the country. All hollow blocks comprise, as the name indicates, hole having the shape of longitudinal channels. These channels are decreasing the weight of the element and are a possible way of wire installations.
  • the channels in the hollow blocks are not only of good, they often lead to a decreased sound and fire resistance which often mean that an additional storey must be added to the construction. This may for example be done by an extra in situ casting or with large alternative superstructures in wood and insulation in the floor. Thus, it is desirable to be able to produce construction elements which sometimes not include channels.
  • the hollow blocks are casted on a casting bed which is between 60-100 meter long, where it in the lower part of the cast compound is arranged
  • the pre-tensioned reinforcement pre-tensioned with a certain force.
  • the pre-tensioned reinforcement is casted into the material. After casting the element is sawn into the desired dimensions.
  • WO2005010292A1 is another patent application describing a
  • An object of the present invention is to solve the above mentioned problems with the production methods of today of prefabricated concrete construction elements. This object is achieved with a construction element as defined in patent claim 1.
  • the invention consequently relates to a construction element in concrete with possible additatives comprising an upper surface and a lower surface and two end surfaces and at least one, between the end surfaces running, reinforcing tensioning member.
  • the invention is characterized in that the tensioning member is enclosed by a pipe which is embedded into the concrete and where the tensioning member have a length longer than the pipe, is arranged moveable in relation to the pipe and is arranged to stay moveable in relation to the pipe.
  • the tensioning member moveable in relation to the embedded pipe it is possible to embed a tensioning member in the mould which is not under tension but is loosely arranged in the cast compound and which stays moveable even after the set of the cast compound.
  • the concrete used in a re-tensioned construction element may be of a
  • the pipe is essentially straight and arranged closer to the lower surface of the construction element that its upper surface.
  • a pre-tensioning is created in the construction element when the tensioning member is re-tensioned and a certain upwards directed bending of the element, which partly counteract the deflection which otherwise occur due to the plastic deformation of the hollow block due to its dead weight, is also created.
  • the pipe has a middle part arranged between the first and the second end of the pipe. This middle part is arranged closer to the lower surface of the construction element than the first and second end of the pipe so that the pipe adapt to a bow shape.
  • first and second end of the pipe is arranged in the vicinity of the upper surface of the construction element and the middle part of the pipe is arranged in the vicinity of the lower surface of the construction element.
  • the tensioning member is firmly attached in the first end surface of the construction element and is arranged loosely laying in the pipe at the second end surface of the pipe.
  • the tensioning member is a reinforcement made by a bar or a wire.
  • the tensioning member may also be made of metal or composite material.
  • the construction is durable and is easy to re-tension and lock in a tensioned state. If the reinforcement is made of a composite material, for example carbon fiber or glass fiber, the construction is lighter and more moisture resistant since these materials do not rust.
  • the construction element comprises at least one through going channel stretching between the end surfaces of the construction element, essentially parallel with the upper and lower surface of the construction element.
  • the used concrete is mixed GGBS and/or fly ash and/or other material giving a puzzolanic effect. This in order to even further decrease the amount of CO2 during manufacturing. It is also possible to add non- tensioned reinforcement and a crack and bend-up reinforcement in the element if so is desired.
  • the invention also relates to a method to manufacture a construction element according to any of the above embodiments, characterized in that it comprises the steps: attaching both ends of a pipe, which encloses a, in relation to the pipe, moveable tensioning element, in a casting mould, attend to that the tensioning element have a length even longer than the length of the pipe, adding casting compound in the casting mould, removing the construction element after it has cured.
  • the construction element may with advantage be pre-produced. This means that the technique require much less resources.
  • the method also comprises the step of attending to that the length of the pipe is longer than the length of the casting mould so that the pipe hangs in the shape of a bow in the mould.
  • the tensioning member By mounting a pipe longer than the casting mould and which hangs in the shape of a bow, the tensioning member is so arranged that when it is re-tensioned it will act against the moment forces and counteract the deflection of the
  • the method also comprises the step of attending to that both ends of the tensioning member protrudes from the first and second end surfaces of the pipe and so that they at least partly protrudes through the edges of the mould or so that the at least partly is inserted into the edges of the mould.
  • the method also comprises the step of, with a tool re-tension the tensioning member with a pulling force.
  • FIG. 1a shows a side view of a first embodiment of the inventive construction element
  • FIG. 1 b shows an end view of a first embodiment of the inventive construction element
  • FIG. 2a shows a side view of a second embodiment of the inventive construction element
  • Fig. 2b shows an end view of a second embodiment of the inventive construction element
  • Fig. 2c shows a cut view in cut A-A in fig. 2a of a second embodiment of the inventive construction element
  • FIG. 3 shows a third embodiment of the inventive construction element
  • Fig. 4 shows the construction element during its manufacturing. Description of embodiments
  • Figures 1a and 1 b shows a construction element 1 in concrete in which it is casted at least one straight pipe 6, which encloses a tensioning member 5.
  • the construction element 1 has an upper surface 2 and a lower surface 3 and two end surfaces 4a, 4b.
  • the construction element 1 also has a height H, a length L and a width B.
  • the height H is preferably between 200 and 600 mm, the length L between 1200 and 3500 mm and the width is preferably less than 2400 mm, which is the maximum width of a commercial vehicle. If the construction element 1 is manufactured on site, other dimensions are also possible.
  • the pipe 6 has a first and a second end 6a, 6b and a, between the ends arranged middle part 6c.
  • the pipe 6 stretches between the two end surfaces 4a, 4b of the construction element and its first and second ends 6a, 6b are preferably in line with the end surfaces 4a, 4b so that the hollow part of the pipe stretches through the entire construction element 1.
  • the length I2 of the pipe 6 is in this embodiment essentially the same as the length L of the construction element 1.
  • the tensioning member 5 has a length 11 which is longer than the length I2 of the pipe 6 and protrudes a certain distance from the end surfaces 4a, 4b, thus are therefore possible to grip from both sides of the construction element 1 and to re- tension with a force F.
  • the tensioning member 5 is arranged moveable in relation to the pipe 6 and will so remain even after molding, which makes re-tensioning possible.
  • the pipe 6 and the tensioning member 5 are arranged in an essentially straight line next to each other in the lower part of the construction element, thus closer to the lower surface 3 of the construction element 3.
  • Figure 2a-2c shows a second embodiment of the construction element, where the pipes 6 and the tensioning members 5 are arranged in a bow shape in the construction element 1.
  • the middle part 6c of the pipes are arranged closer to the lower surface 3 of the construction element than the first and second end 6a, 6b of the pipes.
  • the first and second end 6a, 6b of the pipes 6 are arranged in the vicinity of the upper surface 2 of the construction element and the middle part 6c of the pipe is arranged in the vicinity of the lower surface 3 of the construction element.
  • the length I2 of the pipes are longer than the length L of the construction element.
  • the tensioning member 5 is firmly attached in the first end surface 4a of the construction element and arranged loosely laying in the pipe by the second end surface 4b of the construction element. Re-tensioning of the tensioning member 6 with a pulling force F then occur by the second end surface 4b.
  • Figure 2b shows a view towards the end surface 4b of the construction element and illustrates that the pipes 6 and the tensioning member 5 protrudes from the end surface near the upper surface 2 of the construction element.
  • the tensioning member 5 itself may be casted into or in another way attached in the concrete in its upper part. This is not shown in any figure, but can of course also be applied in the embodiment shown in figures 1a and 1 b.
  • Figure 2c shows a cut view through the cut A-A in figure 2a. Here it is illustrated that the middle part 6c of the pipes are arranged closer to the lower surface 3 of the construction element.
  • Figure 3 shows an embodiment having the shape of a hollow block where channels 7 runs through the entire construction element 1. Between the channels 7 are the pipes 6 and tensioning members 5 arranged.
  • Figure 4 shows a casting mould M in which a casting compound C of concrete is about to be added.
  • a casting compound C of concrete is about to be added.
  • both ends 6a, 6b of at least one pipe 6 are attached.
  • the pipes 6 encloses a, in relation to the pipe, moveable and un-tensioned tensioning member 5.
  • the length I2 of the pipes are longer than the inner length L of the casting mould, i.e. the length of the ready construction elements.
  • the tensioning members 5 may have a length 11 even shorter than the pipes 6 so that they at least partly protrude out through the edges/walls of the mould M or so that they protrude at least a certain distance into the edge/wall of the casting mould. This ensures that only the pipes 6 and not the tensioning members 5 are casted into the concrete when the construction element cures so that the tensioning members remain moveable in relation to the pipes.
  • the tensioning members 5 are re-tensioned with an appropriate tensioning force F.
  • the re-tensioning is preformed with a suitable tool, for example a jack.
  • the tensioning member may be re-tensioned at the construction site or at a storage site.
  • the tensioning member 5 remains moveable after the first re-tensioning.
  • the casting compound C used may be recycled or have a lower quality since the tensioning members 5 are arranged loosely in the casting compound C when it cures and are therefore not inducing any stress to the concrete. Since this method also makes it possible to cast separate individual elements on site the curing time is not decisive for the choice of concrete quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Abstract

L'invention concerne un élément de construction (1) en béton comportant une surface supérieure (2), une surface inférieure (3), deux surfaces d'extrémité (4a, 4b), et au moins un renfort tendeur (5) tiré entre les deux surfaces d'extrémité (4a, 4b). L'invention est caractérisée, d'une part en ce que le tendeur (5) est enfermé dans une gaine (6) noyée dans le béton, et d'autre part en ce que le tendeur considéré (5) est d'une longueur (l1) supérieure à celle de la gaine (l2), en ce qu'il est mobile dans la gaine (6), et en ce qu'il est conçu pour rester mobile dans la gaine (6). L'invention concerne également un procédé de fabrication d'un tel élément de construction (1).
EP13806191.6A 2012-06-19 2013-06-11 Élément de construction et procédé de fabrication d'un tel élément de construction Withdrawn EP2861805A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1250653A SE536597C2 (sv) 2012-06-19 2012-06-19 Byggnadselement i betong samt metod för att tillverka ett sådant byggnadselement
PCT/SE2013/050666 WO2013191615A1 (fr) 2012-06-19 2013-06-11 Élément de construction et procédé de fabrication d'un tel élément de construction

Publications (2)

Publication Number Publication Date
EP2861805A1 true EP2861805A1 (fr) 2015-04-22
EP2861805A4 EP2861805A4 (fr) 2016-01-20

Family

ID=49769099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13806191.6A Withdrawn EP2861805A4 (fr) 2012-06-19 2013-06-11 Élément de construction et procédé de fabrication d'un tel élément de construction

Country Status (3)

Country Link
EP (1) EP2861805A4 (fr)
SE (1) SE536597C2 (fr)
WO (1) WO2013191615A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB935557A (en) * 1959-01-26 1963-08-28 Jack Vernon Welborn Improvements in or relating to stressing concrete
US3422586A (en) * 1966-05-12 1969-01-21 Domenico Parma System for post-stressing concrete slabs,beams or other structures
AT279124B (de) * 1968-05-07 1970-02-25 Holzmann Philipp Ag Verfahren und Hüllrohr zur Herstellung von Spannbetonbauteilen
US3579931A (en) * 1969-09-18 1971-05-25 Du Pont Method for post-tensioning tendons
NO138157C (no) * 1971-01-21 1978-07-12 Shakespeare Co Sloeyfeforankring for forspente betongkonstruksjoner
US4306395A (en) * 1978-06-01 1981-12-22 Carpenter Orval R Lightweight cementitious product and method for making same
KR20000070786A (ko) * 1997-12-05 2000-11-25 야스이 쇼사꾸 프리스트레스트 콘크리트 구조체, 프리스트레스트 콘크리트 성형체에 사용하는 보강부재 및 보강부재에 사용하는 시트부재
ITMI20022119A1 (it) * 2002-10-04 2004-04-05 Benito Zambelli Dispositivo per il collegamento di una trave a pilastri,
US8297026B1 (en) * 2009-07-21 2012-10-30 Bracegirdle P E Construction system and method having integrated plank and framing members

Also Published As

Publication number Publication date
SE536597C2 (sv) 2014-03-18
EP2861805A4 (fr) 2016-01-20
WO2013191615A1 (fr) 2013-12-27
SE1250653A1 (sv) 2013-12-20

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