U.S. patent application number 10/240373 was filed with the patent office on 2004-01-22 for apertured wall element.
Invention is credited to Piccone, Francesco.
Application Number | 20040010994 10/240373 |
Document ID | / |
Family ID | 4165707 |
Filed Date | 2004-01-22 |
United States Patent
Application |
20040010994 |
Kind Code |
A1 |
Piccone, Francesco |
January 22, 2004 |
Apertured wall element
Abstract
A stay in place concrete formwork wall element comprises a major
surface defining a portion of a face of the concrete wall, said
surface having a plurality of uniformly sized and spaced apertures
substantially throughout the surface allows concrete to seep
partially through the apertures thereby providing an irregular
trowelable surface facilitating the application of stucco or other
wall coverings.
Inventors: |
Piccone, Francesco;
(Vancouver, CA) |
Correspondence
Address: |
IPSOLON LLP
805 SW BROADWAY, #2740
PORTLAND
OR
97205
US
|
Family ID: |
4165707 |
Appl. No.: |
10/240373 |
Filed: |
June 25, 2003 |
PCT Filed: |
May 29, 2001 |
PCT NO: |
PCT/CA01/00429 |
Current U.S.
Class: |
52/425 |
Current CPC
Class: |
E04B 2/8641 20130101;
E04B 2/8658 20130101 |
Class at
Publication: |
52/425 |
International
Class: |
E04B 002/00 |
Claims
What is claimed is:
1. [cancelled] A stay-in-place formwork element for use in formwork
for pouring a concrete wall, said element having a surface defining
a part of one face of said wall, said surface having a plurality of
uniformly sized and spaced apertures substantially throughout said
surface.
2. [cancelled] An element as in claim 1 wherein said element is
made of polyvinyl chloride.
3. [cancelled] An element as in claim 1 or 2 wherein said apertures
are between one thirty-second and one quarter of an inch in
diameter and are spaced from one another between one thirty-second
and three sixteenths of an inch.
4. [cancelled] An element as in claim 3 wherein said apertures are
one eight of an inch in diameter and are spaced one sixteenth of an
inch from one another.
5. [cancelled] A stay in place formwork assembly for pouring a
concrete wall, said assembly comprising a plurality of
interconnected wall elements and a plurality of connecting members
maintaining opposing faces of said formwork in spaced relationship,
each of said wall elements comprising at least one surface defining
a part of a face of the wall and having a plurality of uniformly
sized and spaced apertures substantially throughout said
surface.
6. [cancelled] An assembly as in claim 5 wherein said wall elements
are made of polyvinyl chloride.
7. [cancelled] An element as in claim 5 or 6 wherein said apertures
are between one thirty-second and on quarter of an inch in diameter
and are spaced from one another between one thirty-second and three
sixteenths of an inch.
8. [cancelled] A stay in place formwork and concrete wall assembly
comprising a plurality of interconnected wall elements, each of
said wall elements comprising at least one surface defining a part
of a face of the wall, a plurality of connecting members
maintaining opposing faces of said formwork in spaced relationship,
a plurality of apertures substantially throughout said surfaces of
said wall elements, concrete poured within said formwork, said
concrete extending through said apertures to form a thin layer of
concrete on the outside of said wall element.
9. [cancelled] A stay in place formwork and concrete wall assembly
comprising a plurality of interconnected wall elements, each of
said wall elements comprising at least one surface defining a part
of a face of the wall, a plurality of connecting members
maintaining opposing faces of said formwork in spaced relationship,
a plurality of apertures substantially throughout said surfaces of
said wall elements, concrete poured within said formwork, said
concrete extending through said apertures to form a plurality of
beads of concrete on the outside of said wall element.
10. [cancelled] An assembly as in claim 8 or 9 wherein said
apertures are approximately one eighth inch in diameter and are
spaced from adjacent apertures by approximately one sixteenth of an
inch.
11. [cancelled] A method of applying stucco to a concrete wall
comprising the steps of: erecting stay in place formwork comprising
wall elements having a plurality of apertures substantially
throughout a major surface of said wall elements; pouring concrete
into said formwork; trowelling a layer of concrete that seeps
through said apertures to produce an irregular surface; and,
applying stucco to said trowelled layer of concrete.
12. A stay-in-place formwork element for use in formwork for
pouring a concrete wall, said element having: a surface defining a
part of one face of said wall; and, said surface having a plurality
of apertures substantially therethrough, such that when concrete is
poured into the formwork, the concrete seeps through the apertures
to form a plurality of heads or a thin layer of concrete on the
outside of said formwork element.
Description
FIELD OF THE INVENTION
[0001] This invention relates to formwork for pouring concrete
structures. In particular, this invention relates to such formwork
which is designed to stay in place after the concrete has set.
BACKGROUND OF THE INVENTION
[0002] It is known to provide PVC formwork for forming concrete
walls that stays in place after the concrete has set to thereby
form sheathing for the resulting concrete wall. However, by its
natures PVC does not provide a very good surface for the
application of paint or stucco. Typically in order to be able to
apply stucco to such PVC sheathing, it is necessary to first apply
a base coat having some adhesive properties, applying a mesh to the
material and subsequently applying the stucco.
[0003] It is an object of this invention to provide stay in place
formwork which nonetheless provide a surface suitable for the
application of stucco.
[0004] It is a further object of this invention to provide stay in
place formwork adapted to optionally provide an external layer of
concrete overlaying the formwork.
[0005] These and other objects of the invention will be better
appreciated by reference to the following disclosure.
SUMMARY OF THE INVENTION
[0006] The invention comprises stay in place formwork wall elements
which are provided with a plurality of small holes to enable the
concrete poured into the formwork to seep through the holes and to
thereby provide a thin layer or beads of concrete on the side of
the formwork forming a face of a wall.
[0007] Preferably, the holes are approximately one-eighth inch in
diameter and are spaced about one sixteenth of an inch from
adjacent holes.
[0008] Other aspects of the invention will be appreciated by
reference to the detailed description of the preferred embodiment
and to the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The preferred embodiment of the invention will be
appreciated by reference to the following description and to the
drawings thereof in which:
[0010] FIG. 1 is a cross-sectional view of stay in place formwork
according to the prior art;
[0011] FIG. 2 is a front view of a formwork element according to
the invention;
[0012] FIG. 3 is a cross-sectional view of a formwork element
according to the invention;
[0013] FIG. 4 is a cross-sectional view of a portion of a formwork
assembly according to the invention wherein concrete has been
poured into the formwork and has seeped through the holes in the
element; and
[0014] FIG. 5 is a side elevation of a wall element according to
the invention showing beads of concrete having seeped through the
apertures.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0015] Referring to FIG. 1, one embodiment of PVC stay in place
formwork according to the prior art includes wall elements 10 and
connecting members 12. Each of the wall elements 10 defines part of
the stay in place sheathing for each of two faces or sides 14, 16
of the resulting concrete wall. The connecting members 12 act to
maintain facing wall elements 10 in spaced relationship. Adjacent
wall elements 10 are interconnected, for example by means of
engaging means 11 on the connecting members 12.
[0016] The wall elements 10 illustrated in the prior art formwork
of FIG. 1 include a flat portion 13 extending between engaging
means 11, the falt portion 13 defining a flat face for the
resulting formwork (which also defines a face of the concrete
wall). Other designs of wall elements include non-flat surfaces
such as concave or corrugated surfaces. The present invention may
be applied equally to such elements, and indeed to any formwork
element having a surface that contributes to defining a face of the
resulting wall.
[0017] FIG. 2 illustrates a plurality of apertures or holes 18
provided in the surface of a wall element 20 in accordance with the
invention. The apertures are uniformly sized and spaced, the
dimensions being between one thirty-second and one quarter of an
inch in diameter and being spaced from one another between one
thirty-second and three sixteenths of an inch. The preferred
diameter of each aperture is approximately one eight of an inch and
the preferred spacing is approximately one sixteenth of an
inch.
[0018] The apertures 18 are provided substantially throughout the
surface. FIG. 2 illustrates interruptions 21, 23 in the uniform
spacing of the apertures due to the presence of structures 25
(shown in FIG. 3). Nonetheless, it will be appreciated that the
apertures are still provided substantially throughout the major
surface of the element that contributes to defining a face of the
wall.
[0019] The apertures are illustrated as being round, but they may
in fact be of arbitrary shapes provided there is substantially
uniform spacing between the apertures to allow uniform flow of
concrete through the apertures.
[0020] In an assembly using the wall elements of the invention, a
plurality of apertured wall elements would be provided in
interconnected relationship so as to define a face of the overall
formwork wall, which of course also defines a face of the concrete
wall. Similar apertured wall elements may be used on the opposite
face of the formwork wall depending on the desire to achieve the
objects of the invention for that face.
[0021] When concrete is poured into the formwork, the apertures
allow a small portion of the concrete to seep through the apertures
and to form either a thin layer of concrete overlaying the wall
element or a plurality of beads of concrete.
[0022] FIG. 4 illustrates a portion of such an assembly wherein one
face 32 of the wall is formed using apertured wall elements 28
according to the invention while the opposing face 34 of the wall
is formed using unapertured wall elements 26 according to the prior
art. The overall formwork also includes prior art connecting
members 22 and 24. It will be appreciated that the formwork segment
illustrated in FIG. 4 is repeated with interconnected segments to
form an overall wall of formwork. In FIG. 4, concrete 27 has been
poured into the formwork. The concrete seeps through the holes 18
to form heads 30 of concrete that protrude slightly to the outside
surface of the wall element 28.
[0023] In the case where the concrete seeps through the apertures
to a sufficient extent to form a substantially uniform layer of
concrete covering the face of the formwork, it may be desirable to
trowel the layer of concrete to produce a more irregular surface
for the application of stucco, paint or other covering. In cases
where the seepage of the concrete through the apertures causes a
plurality of beads of concrete, the resulting surface may already
be sufficiently irregular for the application of stucco or other
covering.
[0024] It will be appreciated that the invention provides a simple
and effective solution to the problem of providing stucco, paint or
other coverings over stay in place formwork.
[0025] It will also be appreciated by those skilled in the art that
although the preferred embodiment of the invention has been
described in some detail, variations and modifications thereto may
be practised without departing from the scope and principles of the
invention.
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