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Prefabricated glass fiber reinforced concrete wallpanel
EP0983407B1
European Patent Office
- Other languages
German French - Inventor
Arif Dündar YETISENER - Current Assignee
- Fibrobeton Yapi Elemanlari Sanayii Insaat Ve Tic
Worldwide applications
Application EP97946232A events
2000-03-08
2004-10-06
Application granted
2004-10-06
2017-11-03
Anticipated expiration
Status
Expired - Lifetime
Description
translated from
The present invention relates to a self heat isolated, light and prefabricated glass fiber reinforced concrete (GRC)
wallpanel and a method for producing
same.
In terms of the state of the art currently
there are 4 types of prefabric wallpanel production methods:
Document EP 0183526 discloses a building panel having an outer layer of
fibre reinforced cement cast in a mould, with a mesh reinforcement arrangement
embedded in the cement layer.
Document WO A 9312303 describes a building panel comprising two
parallel opposed spaced apart facing sheets made from fibre reinforced concrete and
an intermediate core of light weight fomed concrete. A reinforcing bridging
member is disposed fully within the foamed concrete core and is bonded to the
facing sheets.
Since there is strict rigidity in all types of these panels they do
not have any movement freedom against building straps and building
movements.
In view of the above mentioned present state of the art, subject
of this application is the solution of the known problems.
Panels produced according to the present state of the art have a
panel thickness of 20-25 cm in order to prevent cracks and breaking of
iron mounting in the panel. In this case sq/m weight of the panel is
about 400-450 kg. And this causes problems in transporting and
mounting of large scale panels, also brings huge loads over building
stude frame concrete. In our invention panel thickness does not exceed
10-15 cm and panel weight is about 90-100 kg. This enables easy
transportation and mounting of the panel, weight load to building
concrete decreases to minimum and amount of iron used in building
stude frame concrete is decreased.
In the panels produced according to the present state of the art
there is a need for further heat isolation and this requires various
isolation materials and a further process, labor use and extra cost.
In our invention since cellular structure and air spaces in foam
concrete function as an isolation material there is no need for further
heat isolation process. Second advantage of heat isolation with
foamconcrete is that since it is possible to produce concrete with
requested densities while forming foam concrete, depending on the
heat values of the area that the panel is to be used, panels having
various isolation values of Lambda values 0.065 to 0.500 and K values
0.29 to 3.33.
Panels produced according to the present state of the art can not
contain forms other than some basic shapes, because iron reinforced
concrete technology itself does not allow it. In our invention since
GRC is a material that can be molded in any form, every kind of
architectural design form can be given to the panels.
Panels produced according to the present state of the art are
heavy and rigid panels. They don't have the freedom of movement apart
from building and the ability to accommodate to the movements such
as building movements, ground movements and straps. Thus there are
cracks and openings in joint gaps among the panel in the course of
time. In our invention GRC shell which forms the outer side of panel is
fixed to the panel steel stude frame with flexible anchorage rods and
panel stude frame is suitable for being fixed to the building tabliers with anchorage plates.
For this reason when transition of movements of the building to the
panel body, flexible anchorage rods bend and the panel is not effected
by movements of the building.
In practice GRC panels can vary depending on the architectural
plan and subject of the application is described in more detail by the
enclosed drawings which are presented just to explain the invention
and have no intention to limit the scope of the invention. They have the
following characteristics which form the invention.
In GRC panel of the invention obtained by providing a
composite product by joining two different elements which have
different characteristics and use, advantages are obtained which are
formed by joining characteristics of two elements and thus there is
obtained novel self heat isolated, light and prefabricated GRC
wallpanel.
In known state of the art Fiber reinforced cement is a type of
cement which is formed by alkali resistant glass fiber and has the
strength of reinforced cement-sand mortar, can be molded and can be
casted in section thickness of 10-12 mm. On the other hand, foam
concrete is a type of air foamed concrete that is obtained by foaming a
foamer liquid chemical by an air generator and mixing this foam with
cement mortar. Because of the air bubbles contained it provides perfect
heat isolation, moreover it is light.
The present invention relates to a self heat isolated, light and
prefabricated GRC wallpanel obtained by joining these two
materials in a form of a panel and a method for producing this.
10-12 mm thick GRC shell is formed (Figure 2,3-b) by spraying
GRC mortar inside steel or glass fiber reinforced plastic (CTP) panel
mold prepared according to the requested architectural form. Spraying
of GRC mortar is done by concrete pump and spray guns built for this
purpose.
Steel stude frame (Figure 2,3-c) (Figure 6) designed to provide
wind load, essential weight etc. mechanic characteristics is going to be
placed inside the formed GRC shell. On this stude frame there is
placed flexible anchorage rods with 50 cm distance from each other.
Also there is provided steel anchorage plates (Figure 2,3-h)(Figure 6-h)
on four comers of steel stude frame which are going to be fixed to steel
straps on the building. Thus, it is displaced inside steel stude frame
GRC shell (b) which both carries the GRC and also the panel by fixing
to building tablier. After this process flexible anchorage rods are
padded to steel stude frame by GRC mortar (Figure 2,3,4-e)(Figure 5-e).
One end of these 6-10 mm section thick , 1-15 long flexible
anchorage rods are fixed to steel stude frame and the other end is fixed
to GRC shell. There is a 6-8 cm free section in between (Figure 5-c).
This free section on the rod provides the flexibility. When there is a
movement in the building and panel these flexible rods bend and
prevent the movement from transmitting to the rigid section. As a
result this causes the ground movements, building movements and
tasmans from being transmitted to the panel.
After placing flexible anchorage rods (Figure 6-d) and steel
stude frame (Figure 6) containing mounting plates (Figure 6-h) into
GRC shell and after each flexible anchorage rod is padded to GRC
shell (Figure 2,3,4-e), a layer of straw steel is placed in order to
function as a filling to the foam which will be poured into shell and
prevent cracks and openings that may happen there, and is fixed from a
few points to the steel stude frame (c). After this stage, panel is formed
by putting foam concrete into GRC shell (Figure 2,3,5-f).
Panel is sent to curing chamber together with its mold, is taken
out of the mold after the curing period and sent to construction area
where it is going to be mounted.
Claims (11)
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Claims (11)
Hide Dependent
translated from
- Heat isolating, light and prefabricated wall panel comprising a glass fiber reinforced concrete shell (b), forming the outer side of the panel, an omega sectioned steel stud frame (c), suitable for being fixed to the Building tabliers with anchorage plates, placed inside said glass fiber reinforced concrete shell, and foamed concrete filling the shell, characterised in that said glass fiber reinforced concrete shell is fixed to said steel stud frame by means of flexible anchorage rods (d), wherein one end portion of said rods is fixed to said steel stud frame and the other end portion is fixed to said glass fiber reinforced concrete shell inner face by means of glass fiber reinforced concrete mortar pads and in which the portion between the ends is a free section that provides the flexibility.
- Self heat isolated wall panel according to claim 1, in which said flexible anchorage rods are L-shaped elements.
- Self heat isolated wall panel according to any preceding claims, in which said flexible anchorage rods are placed with 50 cm distance from each other.
- Self heat isolated wall panel according to claim 1, in which said anchorage plates are placed on four corners of said steel stud frame and in which said anchorage plates are fixed on steel straps on the building tablier.
- Self heat isolated wall panel according to claim 1, in which said foam concrete provides heat isolation.
- Self heat isolated wall panel according to any preceding claims, in which the isolation values vary in the range of Lambda values between 0,065 and 0,500 an K values between 0,029 and 3,33.
- Self heat isolated wall panel according to any preceding claims, in which layer of straw steel is placed on the steel stud frame as a filling of the foam concrete in order to prevent the possible cracks and openings on said foam concrete.
- Self heat isolated wall panel according to any preceding claims, in which the panel thickness is about 10-15 cm.
- Self heat isolated wall panel according to any preceding claims, in which the panel weight is 90-100 kg for each meter square.
- Self heat isolated wall panel according to any preceding claims, in which any kind of architectural design form is given to the panel.
- A method for producing a self heat isolated wall panel according to any preceding claims comprising the steps of:a) preparing a steel or glass fiber reinforced plastic panel mould with desiderate architectural forms and designs;b) spraying glass fiber reinforced concrete mortar into said panel mould and forming a 10-12 mm thick glass fiber reinforced concrete shell;c) placing inside the formed glass fiber reinforced concrete shell a steel stud frame designed to provide wind load, particular weight and mechanical characteristics;d) providing the steel stud frame with flexible anchorage rods with 50 cm distance from each other and providing the steel stud frame with anchorage plates on the four corners of the steel stude frame;e) Padding the flexible anchorage rods to the inner face of the glass fiber reinforced concrete shell by means of glass fiber reinforced concrete mortar pads;f) Placing a layer of straw steel on the steel stud frame;g) Filling into the glass fiber reinforced concrete shell the foam concrete as to form the panel;h) Sending the panel to the curing chamber inside the mould;i) Removing the panel from the mould.