EP0818287B1 - Mold for prefabricated concrete panels - Google Patents
Mold for prefabricated concrete panels Download PDFInfo
- Publication number
- EP0818287B1 EP0818287B1 EP96939948A EP96939948A EP0818287B1 EP 0818287 B1 EP0818287 B1 EP 0818287B1 EP 96939948 A EP96939948 A EP 96939948A EP 96939948 A EP96939948 A EP 96939948A EP 0818287 B1 EP0818287 B1 EP 0818287B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- panels
- section
- concrete
- panel
- 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.)
- Expired - Lifetime
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Classifications
-
- 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
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
- E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
-
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0064—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces
- B28B7/0085—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces with surfaces for moulding chamfers
-
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/10—Moulds with means incorporated therein, or carried thereby, for ejecting or detaching the moulded article
-
- 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
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
-
- 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
Definitions
- the technique of reinforced or prestressed concrete precast panels with an open section employed as structural floor slab elements in industrialized building systems corresponds basically to the so-called ⁇ -section precast panels formed by two longitudinal ribs and two lateral and one central flanges.
- the ⁇ -section precast panels technique was first developed for ribbed floor slabs supported on precast beams. Next it was extended to composite floors comprising the precast ribbed slab units and the reinforced concrete plane beams, in which the overall depth of ribbed floor slabs equals that of the concrete plane beams, cast in situ together with reinforced concrete over the panels.
- the proposed invention refers to the development of reinforced and prestressed concrete precast panel units with an open section, of the so-called inverted channel section type of panels, formed by two longitudinal ribs, or panel beams, and one central flange, taking into account the adecuate fire resistance requirements for floor systems.
- the problem when using the technique of reinforced concrete precast panels with ⁇ -section is the insufficient width of usual panel ribs to hold the maximum action-effects in the floor ribbed slabs, during the ocurrence of a standard fire in the area limited by the floors, taking into account both the reduction of steel reinforcement and concrete strenghts for the high temperatures reached in the fire and the temperature distribution on these materials in the floor cross section.
- the desideratum from the fire resistance point of view is to make the precast panels with an inverted channnel open section having a strict rectangular section exterior form, ensuring that the lateral sides of panel ribs are plane and parallel.
- each beam formed by the pair of ribs of coupled panels is equivalent to a double-width beam.
- the equivalence means that there are the same boundary conditions for maximum temperatures on the surfaces directly attacked by fire and the same temperature distribution in both the resistent concrete core within the cross section and the steel reinforcement, and therefore the resulting floor elements have mechanical strength analogous to that of double-width beam floor.
- the molds for casting rectangular section panels referred to in the known patent documents belong to this class of 'molds in pieces'.
- the lower part of the mold is pushed upwards to take out a single panel, by separating the set formed by this lower part and the precast panel lying on it from the mold's lateral pieces and the formwork bench; for this purpose the material should be only partially hardened, such that the separate panel cannot be removed from the movable lower part of the mold because it is not yet self-supporting.
- the problem is, therefore, to obtain reinforced or prestressed concrete precast panels with an inverted channel section having a strict rectangular section exterior form, ensuring also that lateral panel sides are plane, in a mold of the class of 'molds in one piece', namely the class of molds in which panels can be taken out without moving any part of the mold and the formwork bench, therefore in a radically different way than in the class of 'molds in pieces'.
- the procedure that solves this problem consists in placing along the formwork two stiff linear elements of triangular shaped section with a right angle, being the opposed side to this angle plane or near-plane as a cylindric concave form. These elements are placed inside the formwork in a way such that the right angle edge of each element lies exactly on the edge of corner formed by planes molding the lateral and lower sides of panel ribs.
- this arrangement determines that precast panels can be taken out by straight and vertical pulling from hooks previously anchored in them, avoiding the failure of panels due of friction forces against the formwork.
- Figure 1 represents how these linear elements are disposed in the rectangular section exterior form which molds the panels in the formwork.
- the symbol e indicates the direction for extraction of paneles.
- the symbol 1 represents the linear pieces with a triangular section, and symbols 2 and 3 designate respectively the initial inclined fracture plane and the more elevated potential parallel fracture plane, in which the failure stresses will not be reached.
- Figure 2 represents the arrangement of two precast panel with the inverted channel section which are jointly placed in the floor which form a double-ribbed slab beam with the alteration made by the linear pieces 1.
- the symbol f represents the three directions in which the standardised fire attacks the double-ribbed slab beam.
- Symbols 4 and 5 design respectively the construction joint between panels and the reinforced concrete over the panel in the floor.
- Symbol 6 corresponds to the cross holes, which are disposed where appropiate to open ways through the slab ribs to avoid accumulation of gases under the floor.
- the function assigned in this invention to the linear rigid elements 1 in the case of a 'mold in one piece' is only to make possible the extraction of the precast panels having an inverted channel section with a strict rectangular exterior form, in a way that these elements become essential in the procedure. It differs from the functions of placing the linear elements similarly along the formwork in the cases of 'molds in pieces', given in the patent documents US-3767153A, DE-4333080A1 and FR-53476. Along these documents it is only referred to that the lower corners are bevelled to avoid the sharp edges of the precast elements having a tendency to failure when managing them as well as to avoid unpleasant aesthetic results in construction joints of precast panels, but not to take the precast panels out of the mold.
- stiff linear elements 1 in the case of a 'mold in one piece' is quite different because such elements, placed on the corners inside the formwork, are fixed both on the lower side part as well as on the lateral side part of the mold, whereas in the cases of 'molds in pieces' they are only fixed on one of the mold side pieces, either the lateral or the bottom, in order to be possible to remove the other side piece of the mold for taking the precast panels out of the mold.
- the panels with an inverted channel rectangular section obtained by this procedure are distinguible from other possible panels made in a mold in which only the adherence force requires to be mobilized, by action of friction on the surfaces of lateral sides of panels, which however are undamaged.
- Figure 3 represents one realization of a formwork bench for fabrication of precast panels with inverted channel section.
- the parallel lateral sides of the panels are molded by the formwork elements formed by U-section steel profiles with parallel flanges and the smooth and corrosion protected steel plates covering the inside web faces in the formwork, respectively denoted by symbols 7 and 8.
- the mold is completed with the steel plates of the same kind, remarked as the symbol 9, which are folded according to the required form for the ribs and flange of panels, and fixed on the stiffness cross plates of the formwork denoted by symbol 10.
- the symbol 11 designs the longitudinal main beams of the formwork bench frame which rest anchored on metallic supports through elastomeric blocks, represented respectively by symbols 12 and 13.
- the triangular linear elements 1 are placed on the formwork and the cylindric elements non-adherent to concrete are cross placed inside the formwork and adjusted to the folded steel plate sides, to mold the panel holes 6, opening cross ways through the slab ribs in the floors.
- the reinforced an prestressed concrete precast panels are fabricated by continuous placing, compacting and vibration and curing of the concrete, and posterior extraction by means of a traveller crane which vertically pulls the panels out from the formwork. These are then stored until the age they reach the adequate strength to be handled and arranged on the building floors.
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- Architecture (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Rod-Shaped Construction Members (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
The technique of reinforced or prestressed concrete precast panels with an
open section employed as structural floor slab elements in industrialized building
systems, corresponds basically to the so-called Π-section precast panels formed
by two longitudinal ribs and two lateral and one central flanges.
The Π-section precast panels technique was first developed for ribbed floor
slabs supported on precast beams. Next it was extended to composite floors
comprising the precast ribbed slab units and the reinforced concrete plane beams,
in which the overall depth of ribbed floor slabs equals that of the concrete plane
beams, cast in situ together with reinforced concrete over the panels.
The proposed invention refers to the development of reinforced and prestressed
concrete precast panel units with an open section, of the so-called inverted channel
section type of panels, formed by two longitudinal ribs, or panel beams, and one
central flange, taking into account the adecuate fire resistance requirements for
floor systems.
The problem when using the technique of reinforced concrete precast panels
with Π-section is the insufficient width of usual panel ribs to hold the maximum
action-effects in the floor ribbed slabs, during the ocurrence of a standard fire
in the area limited by the floors, taking into account both the reduction of steel
reinforcement and concrete strenghts for the high temperatures reached in the
fire and the temperature distribution on these materials in the floor cross section.
Such a problem can be solved without increasing the weight of precast units,
from some mimimum width of panel ribs, by employing the new type of panels
with an inverted channel section which double the width of ribs of floor slabs
that result when they are coupled. This solution keeps the advantages of industrialized
prefabrication of panels and efficient transportation, by avoiding an
overdimensioned design of the fire resistent structures, making possible the use
of usual cranes to handle the precast units in the construction process.
In this case, the desideratum from the fire resistance point of view is to make
the precast panels with an inverted channnel open section having a strict rectangular
section exterior form, ensuring that the lateral sides of panel ribs are plane
and parallel.
In this way the minimum width for construction joints between the lateral
sides of coupled panels can be obtained at the working place; then it is possible
to ensure that, regarding the fire resistance in the most unfavourable case of
simultaneous action of fire on three slab rib sides, each beam formed by the pair
of ribs of coupled panels is equivalent to a double-width beam.
The equivalence means that there are the same boundary conditions for maximum
temperatures on the surfaces directly attacked by fire and the same temperature
distribution in both the resistent concrete core within the cross section
and the steel reinforcement, and therefore the resulting floor elements have mechanical
strength analogous to that of double-width beam floor.
Otherwise, if the exterior form of panels is not rectangular and the rib thickness
increases progressively from the bottom to facilitate the extraction of panels
from the formwork, the width of resulting construction joints cannot ensure the
equivalence of internal and external temperature distributions in the cross sections.
Note that this would be the case using the Π-section precast panels when
cutting the lateral flanges of the panels.
Systems of molds employed so far in fabrication of panels with a strict rectangular
section exterior form belong to the class of 'molds in pieces', namely the
class of molds in which one or more pieces of the mold must be removed to obtain
the cast elements.
In particular, the molds for casting rectangular section panels referred to in
the known patent documents belong to this class of 'molds in pieces'. Thus, on
the one hand, in the case referred to in the document US-3767153A, which is the
only one regarding molds for panels having an inverted channel section with a
rectangular exterior form, the lower part of the mold is pushed upwards to take
out a single panel, by separating the set formed by this lower part and the precast
panel lying on it from the mold's lateral pieces and the formwork bench; for this
purpose the material should be only partially hardened, such that the separate
panel cannot be removed from the movable lower part of the mold because it is
not yet self-supporting.
In a similar way, in the case referred to in the document FR-53476, related
not to precast panels but to small rectangular blocks, the lower part of the mold
is moved up and separated from the remainder of the mold to obtain the blocks;
for that purpose consistency of block material should be soft as well.
On the other hand, in the case referred to in the document DE-4333080A1,
which is solely related to stiffly hardened panels with rectangular section, the
mold lateral pieces are horizontally removed toward the sides by opening the
mold to take out the panel while the lower part of the mold remains fixed on the
formwork bench.
Document US-3767.153A or ES-2 076 856 A2 is considered constitute the closest prior art, and
corresponds therefore to the preamble of claim 1. It shows however a mold for
the production of concrete panels, where the mold belongs to the type of "mold
in pieces", which means that one or more parts of the mold must be removed to
take the casted panels out of the mold.
However, because of fast production, eficiency and economy, interest in this
invention is focussed in fabrication of open section panels in a fixed mold in
one piece, longer than usual molds in pieces for a single panel, on which the
spacers and headers of panels are placed, given the advantages for industrial
fabrication of continuous placing and compacting of the concrete and posterior
straight extraction of many precast panels from the formwork.
The problem is, therefore, to obtain reinforced or prestressed concrete precast
panels with an inverted channel section having a strict rectangular section exterior
form, ensuring also that lateral panel sides are plane, in a mold of the class of
'molds in one piece', namely the class of molds in which panels can be taken out
without moving any part of the mold and the formwork bench, therefore in a
radically different way than in the class of 'molds in pieces'.
The procedure that solves this problem consists in placing along the formwork
two stiff linear elements of triangular shaped section with a right angle, being the
opposed side to this angle plane or near-plane as a cylindric concave form. These
elements are placed inside the formwork in a way such that the right angle edge
of each element lies exactly on the edge of corner formed by planes molding the
lateral and lower sides of panel ribs.
Once the suitable angles and dimensions of the triangular elements as well as
the convenient stiffness of formwork elements are fixed, this arrangement determines
that precast panels can be taken out by straight and vertical pulling from
hooks previously anchored in them, avoiding the failure of panels due of friction
forces against the formwork.
Indeed, when taking the panel out from the formwork, the latter becomes
elastically deformed laterally making the compression normal forces and the friction
vertical forces against the panel to be located near the lateral corners inside
the formwork. Moreover, stresses due to friction along the panels are concentrated
just in those zones near the fasteners stiffening the different elements of
the formwork. Both effects, developed when taking out the panels, would cause
the shear fracture of the concrete close to these zones, approximately according
to an inclined failure plane, parallel to the edge of each lateral inferior corner of
the panels. Figure 1.
The position of the above mentioned stiff linear pieces in the formwork corners
raises the possible fracture plane, with the same angle for this plane than in
the fracture case; it increases considerably the area of potential fracture surface
making that normal and shear stresses on this surface, which are related to the
same normal and friction forces, become smaller than the failure stresses defined
by the intrinsic resistance curve of concrete at the age of extraction of panels.
Figure 1 represents how these linear elements are disposed in the rectangular
section exterior form which molds the panels in the formwork. In this figure the
symbol e indicates the direction for extraction of paneles. The symbol 1 represents
the linear pieces with a triangular section, and symbols 2 and 3 designate
respectively the initial inclined fracture plane and the more elevated potential
parallel fracture plane, in which the failure stresses will not be reached.
When the width of construction longitudinal joints between two ribs of coupled
panels is minimum and the reinforcement covers and spacement are adequate,
then the change in the initial rectangular section resulting when molding panels
with the linear triangular pieces, does not alter significatively the fire resistance
of the floor, maintaining the internal temperature distribution on the
steel reinforcement and the resistent concrete core in the cross section.
Figure 2 represents the arrangement of two precast panel with the inverted
channel section which are jointly placed in the floor which form a double-ribbed
slab beam with the alteration made by the linear pieces 1. In this figure the
symbol f represents the three directions in which the standardised fire attacks the
double-ribbed slab beam. Symbols 4 and 5 design respectively the construction
joint between panels and the reinforced concrete over the panel in the floor.
Symbol 6 corresponds to the cross holes, which are disposed where appropiate to
open ways through the slab ribs to avoid accumulation of gases under the floor.
The function assigned in this invention to the linear rigid elements 1 in the
case of a 'mold in one piece' is only to make possible the extraction of the precast
panels having an inverted channel section with a strict rectangular exterior form,
in a way that these elements become essential in the procedure. It differs from the
functions of placing the linear elements similarly along the formwork in the cases
of 'molds in pieces', given in the patent documents US-3767153A, DE-4333080A1
and FR-53476. Along these documents it is only referred to that the lower corners
are bevelled to avoid the sharp edges of the precast elements having a tendency
to failure when managing them as well as to avoid unpleasant aesthetic results
in construction joints of precast panels, but not to take the precast panels out of
the mold.
The arrangement of these stiff linear elements 1 in the case of a 'mold in one
piece' is quite different because such elements, placed on the corners inside the
formwork, are fixed both on the lower side part as well as on the lateral side part
of the mold, whereas in the cases of 'molds in pieces' they are only fixed on one
of the mold side pieces, either the lateral or the bottom, in order to be possible
to remove the other side piece of the mold for taking the precast panels out of
the mold.
Moreover the simple arrangement of linear elements in each interior corner of a
'mold in one piece' is not sufficient to allow the extraction of precast panels with
an strict rectangular inverted channel section without failures in panels. Both
the appropriate transversal and longitudinal stiffness of the mold and a suitable
shape and dimensions of the linear elements 1 are required to pull out the panels;
such dimensions have to be also stated to ensure the due fire resistance of panels.
The system of normal and friction forces and the stress field originated in the
case of the 'mold in one piece' for panels with an inverted channel rectangular
section are also different from the system of forces and the stress field in the
case of 'molds in pieces' referred to in the above patent documents. Thus in the
cases described in US-3767153A and FR-53476 in which the material is partially
hardened or has soft consistency, the applied forces should mobilize only the
adherence to fixed pieces of the mold, since the said material may be yet deformed.
In the case referred in DE-4333080A1, in which panels are stiffly hardened, lateral
forces should mobilize only adherence stress since there is not friction. The
system of forces and the stress field are also quite different from those in the
usual Π-section precast panels technique, with trapezoidal section ribs, in which
the applied forces should only mobilize the adherence to the mold.
Hence, the panels with an inverted channel rectangular section obtained by
this procedure are distinguible from other possible panels made in a mold in
which only the adherence force requires to be mobilized, by action of friction on
the surfaces of lateral sides of panels, which however are undamaged.
Figure 3 represents one realization of a formwork bench for fabrication of
precast panels with inverted channel section. The parallel lateral sides of the
panels are molded by the formwork elements formed by U-section steel profiles
with parallel flanges and the smooth and corrosion protected steel plates covering
the inside web faces in the formwork, respectively denoted by symbols 7 and
8. The mold is completed with the steel plates of the same kind, remarked
as the symbol 9, which are folded according to the required form for the ribs
and flange of panels, and fixed on the stiffness cross plates of the formwork
denoted by symbol 10. The symbol 11 designs the longitudinal main beams of
the formwork bench frame which rest anchored on metallic supports through
elastomeric blocks, represented respectively by symbols 12 and 13. In the same
figure it is represented how the triangular linear elements 1 are placed on the
formwork and the cylindric elements non-adherent to concrete are cross placed
inside the formwork and adjusted to the folded steel plate sides, to mold the panel
holes 6, opening cross ways through the slab ribs in the floors.
On this logitudinal formwork having an inverted channel open section, the reinforced an prestressed concrete precast panels are fabricated by continuous placing, compacting and vibration and curing of the concrete, and posterior extraction by means of a traveller crane which vertically pulls the panels out from the formwork. These are then stored until the age they reach the adequate strength to be handled and arranged on the building floors.
On this logitudinal formwork having an inverted channel open section, the reinforced an prestressed concrete precast panels are fabricated by continuous placing, compacting and vibration and curing of the concrete, and posterior extraction by means of a traveller crane which vertically pulls the panels out from the formwork. These are then stored until the age they reach the adequate strength to be handled and arranged on the building floors.
Claims (4)
- A mold for the production of reinforced or prestressed concrete panels having an inverted channel concrete section with a strictly rectangular external form, having plane parallel lateral sides in order to form longitudinal ribs with plane parallel lateral sides, that part of the mold defining the inside panel section being formed such that the longitudinal ribs have a variable width, characterized in that the mold is of the type "mold in one piece", and that two linear stiff linear elements (1) of triangular shaped section with a right angle are provided inside the mold in a way such that the right angle edge of each element lies on the edge of the corner between the plane lateral side and the underside of the rib forming part of the mold.
- The mold according to claim 1 characterized in that the plane parallel sides of the mold in order to form the longitudinal ribs with plane parallel lateral sides consist of U-section steel profiles with parallel flanges with a smooth and corrosion protected steel plate covering their webs, and in that the steel plate of the same kind is folded to shape the inside section of the mould with variable rib width.
- The mold according to claim 1 or claim 2 characterized in that cylindric elements non-adherent to concrete are provided inside the mold in order to create holes (6) communicating the spaces between slab ribs in the floors.
- A method of producing reinforced or prestressed concrete panels having an inverted channel concrete section with a strictly rectangular external form, using the mold as defined in one of the claims 1 to 3, the method comprising the steps of: filling the mold with concrete, taking the panel out of the mold once the panel is stiffly hardened, by straight and vertical pulling, thus leaving the mold a "mold in one piece".
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES9502383 | 1995-12-01 | ||
| ES9502383 | 1995-12-01 | ||
| PCT/ES1996/000229 WO1997020666A1 (en) | 1995-12-01 | 1996-11-27 | Mold for prefabricated concrete panels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0818287A1 EP0818287A1 (en) | 1998-01-14 |
| EP0818287B1 true EP0818287B1 (en) | 2002-10-09 |
Family
ID=8292378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96939948A Expired - Lifetime EP0818287B1 (en) | 1995-12-01 | 1996-11-27 | Mold for prefabricated concrete panels |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0818287B1 (en) |
| DE (1) | DE69624226T2 (en) |
| ES (1) | ES2179955T3 (en) |
| MX (1) | MX9706107A (en) |
| WO (1) | WO1997020666A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6698150B1 (en) | 1998-06-09 | 2004-03-02 | Brentmuir Developments (1993) Limited | Concrete panel construction system |
| EP1185748B1 (en) * | 1999-06-09 | 2009-03-04 | Brentmuir Developments (1993) Limited | Concrete panel construction system |
| WO2006056073A1 (en) | 2004-11-26 | 2006-06-01 | Nick Di Lorenzo | Concrete panel construction system and method of making panels |
| CA2699121C (en) | 2009-04-07 | 2018-05-08 | Brentmuir Developments (1993) Limited | Concrete panel corner connection |
| NL2004864C2 (en) * | 2010-06-09 | 2011-12-13 | Infra & B V | Moulds and methods for forming prefab concrete floor elements and prefab elements. |
| EA037734B1 (en) | 2015-05-21 | 2021-05-14 | Лифтинг Пойнт Пре-Форм Пти Лимитед | Construction module for constructing reinforced concrete structure and modular reinforced concrete bridge |
| CN108772944A (en) * | 2018-05-07 | 2018-11-09 | 安徽砼宇特构科技有限公司 | It is a kind of to facilitate fixed installation formula precast concrete case |
| CN109176862B (en) * | 2018-11-09 | 2023-09-29 | 新疆博壹市政工程有限责任公司 | Manufacturing equipment structure and manufacturing method of ribbed prestressed prefabricated bottom plate |
| CN114482375B (en) * | 2022-02-22 | 2023-07-28 | 杭州江润科技有限公司 | Construction method of integral joint type reinforced concrete superimposed sheet |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR886179A (en) * | 1942-08-29 | 1943-10-07 | Demoulding method and device | |
| BE756509A (en) * | 1969-09-23 | 1971-03-01 | Haller Hans | FLOOR CONSISTING OF PREFABRICATED ELEMENTS JUXTAPOSED AND MOLDED, AND PROCESS FOR THEIR MANUFACTURING |
| NL148528B (en) * | 1973-02-27 | 1976-02-16 | Kalkman Maschf En Handelsonder | DEVICE FOR THE MANUFACTURE OF A TILE WITH A CIRCULAR FACETED EDGE. |
| DE3109108A1 (en) * | 1981-03-11 | 1982-09-23 | Karl Lösch KG, 6722 Lingenfeld | Moulded concrete slab with chamfer |
| JPH02301404A (en) * | 1989-05-16 | 1990-12-13 | Okagaki Kogyo Kk | Descaling cleaning of steel concrete frame |
| ES2076856B1 (en) * | 1993-03-03 | 1998-11-01 | Ruiz Miguel Camarero | CONSTRUCTION SYSTEM OF PREFABRICATED SEAT PLATES. |
| DE4333080A1 (en) * | 1993-09-29 | 1995-03-30 | Ebawe Maschinenbau Gmbh | Mould for producing panel-like or slab-like precast concrete units |
-
1996
- 1996-11-27 DE DE69624226T patent/DE69624226T2/en not_active Expired - Fee Related
- 1996-11-27 MX MX9706107A patent/MX9706107A/en active IP Right Grant
- 1996-11-27 ES ES96939948T patent/ES2179955T3/en not_active Expired - Lifetime
- 1996-11-27 WO PCT/ES1996/000229 patent/WO1997020666A1/en active IP Right Grant
- 1996-11-27 EP EP96939948A patent/EP0818287B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 015, no. 081 (M-1086), 25 February 1991 (25.02.91), & JP 02 301404 A (OKAKAGI KOGYO KK), 13 December 1990 (13.12.90) * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69624226D1 (en) | 2002-11-14 |
| WO1997020666A1 (en) | 1997-06-12 |
| MX9706107A (en) | 1997-11-29 |
| DE69624226T2 (en) | 2003-10-30 |
| ES2179955T3 (en) | 2003-02-01 |
| EP0818287A1 (en) | 1998-01-14 |
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