NL8603068A - A method for manufacturing system floors. - Google Patents

A method for manufacturing system floors. Download PDF

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Publication number
NL8603068A
NL8603068A NL8603068A NL8603068A NL8603068A NL 8603068 A NL8603068 A NL 8603068A NL 8603068 A NL8603068 A NL 8603068A NL 8603068 A NL8603068 A NL 8603068A NL 8603068 A NL8603068 A NL 8603068A
Authority
NL
Netherlands
Prior art keywords
formwork
prestressed concrete
beams
floor
side walls
Prior art date
Application number
NL8603068A
Other languages
Dutch (nl)
Original Assignee
Oudenallen S Betonindustrie B
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 Oudenallen S Betonindustrie B filed Critical Oudenallen S Betonindustrie B
Priority to NL8603068 priority Critical
Priority to NL8603068A priority patent/NL8603068A/en
Publication of NL8603068A publication Critical patent/NL8603068A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02Arrangements 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
    • B28B23/22Arrangements 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 assembled from preformed parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00Machines or methods for applying the material to surfaces to form a permanent layer thereon

Description

4 «

K

- 1 -

Method for manufacturing system floors.

The invention relates to a method for manufacturing system floors, consisting of at least one pre-manufactured floor element, which floor element or which floor elements are subsequently mounted at work.

Such floor elements are known from J.J. Friend,

Building, part 1 4th edition Publisher. Kosmos, Amsterdam, p.

284-287. The elements of pages 284 and 285 fig. E 1 to 3 are made up of hollow bricks, which are bricked in the factory by inserting reinforcing bars of rebar up to 10 vertical walls, which are transported to work after the cement has hardened and placed on the supports. On the same page, Fig. B4-II shows a system in which reinforced concrete T-beams are placed on the supporting walls and the top surfaces join together.

Also on pages 286 and 287 fig. A 1 to A 4 are described hollow floor plates, which are also placed against each other on the support points.

With all these system floors, the top is not smooth and flat and it is necessary to apply a finishing layer of a few 20 centimeters thickness, which not only takes extra time, but also has the result that after finishing during the curing time of this layer which, depending on the system chosen, can be about eight days, cannot walk on the floor, whereby the construction time is unnecessarily extended.

After this time, there is still a significant amount of moisture present, which must necessarily be removed by heating before the building can be finished further. All these factors have a significant cost-increasing effect during the humid time of the year.

According to the inventive feature, these drawbacks are avoided by the fact that at least one beam of prestressed concrete, provided with reinforcement projecting at the top, is mounted in a horizontal formwork at a distance of at least at least in the case of complete curing reversed. the bottom of the formwork is equal to or less than the desired thickness of the floor slab, which formwork is provided with a flat, smooth, seamless, preferably sheet steel bottom and side walls, after which in this formwork, in which parallel at the bottom a reinforcement, for example in the form of a mat of building steel, is or is applied, a concrete layer of the desired thickness of the floor slab is poured, which concrete layer can then be vibrated and after sufficient curing the floor element thus obtained is the formwork is removed.

By pouring the floor upside down, an extremely smooth tread is obtained, whereby the application of a finishing layer is superfluous and immediately after the floor element has been mounted on the construction, it can be walked on permanently and further dry-burning is unnecessary.

If the floor element were to be constructed as a whole in prestressed concrete, the surface would not remain flat, since, among other things, due to the inhomogeneity of the concrete mass and uneven temperatures, which occur during curing, different permanent pretensions occur in the individual elements. , which together form one floor, occur, causing different curves in the elements.

By first pouring the prestressed concrete beams into a separate mold and at least allowing them to harden sufficiently, the beams are subsequently not warped from the floor surface, since there is practically no more shrinkage and / or creep of the beams, while the surface of the floor slab becomes flat and smooth.

The smooth sheet steel side pieces of the formwork provide smooth side surfaces of the floor elements and thus a good connection of adjacent floor elements.

According to another feature of the invention, positioning means are provided in the end faces of the prestressed concrete beams, which co-act with positioning means of a clamping device arranged on the outside of the formwork, between which the prestressed concrete beams are poured of the floor plate must be firmly clamped.

Hereby it is achieved that the beams of prestressed 8603068.

- 3 - concrete has a fixed position relative to the formwork, which does not change during compaction, so that the adhesion of the concrete of the floor slab to the beams of prestressed concrete is not disturbed.

According to another feature of the invention, in order to obtain supporting edges, the length of the prestressed concrete beams is chosen to be at most equal to the length of the floor element minus the sum of the widths of the supporting edges, while the height of the side walls of the formwork, at least at the location of the supporting edges, is equal to the desired thickness of the floor slab and a possibly detachable, preferably steel element with smooth underside is attached to this location of the side walls and is present during the pouring and compacting of the concrete layer is.

In this way a smooth supporting edge is obtained, which is equally thick everywhere, which when mounted on, for instance, horizontal concrete beams automatically leads to the top surfaces of adjacent floor elements joining together without a jump.

According to a further feature of the invention, the bottom of the formwork consists of a flat, smooth, preferably sheet steel bottom, which can be provided on its underside with reinforcing ribs and on which at least three upright side walls are arranged, at least one of which is detachable. , which side walls connect two by two.

It will be clear that the bottom can consist of any smooth material, provided it is resistant to wet, freshly poured concrete, but in practice steel plate will be preferred. The number of upright side walls depends on the shape of the floor element. If this is triangular, three side walls are of course sufficient. At least one of these side walls is detachable, which makes it easier to remove the floor element from the mold after curing. If the side walls were not detached, the edges of the floor element would be damaged, so that the finished floor would have to be reworked. If desired, all 8603068 * - 4 - side walls can of course also be made detachable. The attachment can be done in all common ways, such as with bolts, clamps and so on. The non-detachable side walls can, for example, be secured or welded by means of rivets.

The prestressed concrete beams can be laid on the bottom with spacers inserted, after which the concrete layer for the floor slab is poured and vibrated by means of vibrating needles.

According to yet another feature of the invention, for each prestressed concrete beam, a two-part clamping device is arranged on the outside of the formwork, which parts are located on either side of the formwork and on the facing sides of the position. Tensioning means for positioning the beam or beams of prestressed concrete are provided.

This achieves that the prestressed concrete beams are always in the same position relative to the bottom of the formwork and the formwork can be vibrated as a whole without the prestressed concrete beams losing their correct position.

Particularly for mounting on prefabricated concrete beams, the surface of which is very flat, it is desirable for a good connection of the floor elements without vertical jumps that the thickness of the supporting edges of the floor elements is the same everywhere.

To this end, according to another feature of the invention, it is ensured that the height of opposite side walls and possibly the height of this connecting side wall at the location where a supporting edge of the floor element is to be formed are equal to the desired thickness of the supporting edge and a possibly detachable, preferably sheet steel element with smooth underside, the width of which is at least equal to the width of the supporting edge, is applied thereon.

According to a further feature of a formwork according to the invention, the side walls running in the longitudinal direction of the beam or beams of prestressed concrete are provided with 8603068-5; in the longitudinal direction and parallel to the ground at an equal distance therefrom complementary profiles.

The advantage of this is that the complementary profiles of neighboring floor elements slide into each other and prevent the movement in vertical sense relative to each other.

According to yet another feature of the invention, a floor element is built up from at least one prestressed concrete beam, on which there is a reinforced concrete floor slab 10 with smooth and flat top and side surfaces, which is integral with the beam or beams of prestressed concrete, which beam or beams on the heads can be provided with positioning means and have a length which is at most equal to the length of the floor plate.

According to yet a further feature of the invention, at least two smooth, flat and equally thick support edges are present and the beam or beams of prestressed concrete have a length which is at most equal to the length of the floor element minus the sum of the widths of the on-20 shelves.

According to another feature of the invention, the sidewalls extending in the longitudinal direction of the beam or beams of prestressed concrete are provided with complementary profiles extending in the longitudinal direction and parallel to the top surface at an equal distance therefrom.

The advantage of this is that when two adjacent floor elements are pushed together, these complementary profiles interlock, so that when the floor elements are loaded between the supporting edges they remain fixed relative to each other.

All this will now be further elucidated by way of example on the basis of the following figure description, in which:

Fig. 1 shows how a formwork according to the invention can be constructed,

Fig. 2 shows a front view of the formwork of FIG. 1 on which a clamping device is arranged,

Fig. Shows 3 heads of prestressed concrete beams, 6603068-6 - equipped with different positioning means,

Fig. 4 shows a view of a formwork with a possible detachable sheet steel element,

Fig. 5 a floor element, whose beams of prestressed concrete extend over the full length of the floor slab,

Fig. 6 a floor element, the beams of which leave the supporting edges, and

Fig. 7 a floor element with complementary profiles on two side walls.

Figure 1 shows a formwork according to the invention, consisting of a bottom 1 of steel plate, on which reinforcing ribs 2 are welded on the underside. Perpendicular to the reinforcing ribs 2, not shown further reinforcing ribs are also welded, so that the bottom 1 is rigid in all directions. Side walls 3, which are designed here as angle steel, are fixed to the bottom 1.

This attachment can be done in various ways, such as with bolts, clamps or welding. The same applies to the side walls 4, which are also made of angle steel here. If all side walls 3 and 4 are welded, the floor element could only be removed in a vertical direction and the edges of the floor element could be easily damaged. This can be avoided by making at least two adjacent side walls detachable, so that the floor element can first be removed from the remaining side walls before being lifted.

Figure 2 shows a front view of the arrangement of figure 1, leaving out the side walls 4. It can clearly be seen how a clamping device consisting of two parts 5 and 6 clamp the beam of prestressed concrete 7 in the desired position, so that the entire formwork can be vibrated without the position of the prestressed concrete beam 7 changing relative to the formwork and the prestressed concrete beam 35 cannot come off the poured floor slab. If one would like to position the prestressed concrete beam 7 without using the clamping devices 5 and 6, this could be achieved by using cement blocks 8603068% -Ιοί. concrete, as dotted with 8. In this case it is impossible to vibrate the entire formwork, but one has to rely on a poker vibrator.

When clamping by the clamping devices 5 and 6, it is necessary to ensure that the prestressed concrete beam 7 cannot move relative to the clamping devices 5 and 6. To this end, both the prestressed concrete beam 7 and the clamping devices 5 and 6 are provided with complementary positioning means. Three possible embodiments of such positioning means are shown in figure 3. In figure 3a the positioning means consist of four pins 9, which are arranged in the head of the prestressed concrete beam 7 and can form part of the reinforcement. These bars cooperate with the complementary positioning means in the clamping devices 5 and 6 in the form of four holes. Figure 3b shows a positioning means in the form of a hollow 10 of rectangular cross-section, in which a complementary protrusion of the clamping devices 5 and 6 fits. It goes without saying that the positioning means 20 of the prestressed concrete beam 7 and the clamping devices 5 and 6 can be interchanged. Figure 3c shows a positioning means in the form of rectangular slots 11, which extend for a length of, for example, ten centimeters in the longitudinal direction of the beam of prestressed concrete 7 and cooperate with complementary rectangular strips, which are attached to the clamping devices 5 and 6 are confirmed.

It will be clear that the invention is not limited to the above described embodiments, but that countless variations are possible.

The positioning means in the prestressed concrete beams can optionally also be used in combination with a hoisting device to remove and turn the floor elements from the formwork after curing.

Fig. 4 shows how, in order to obtain smooth support edges, which are equally thick everywhere, the side walls 4 are locally milled to a height, d, equal to the desired thickness of the support edges, and steel 8603068 t * - 8 - Ments 12 in the form of angle steel with smooth undersides are attached. It is also possible to drop these steel elements 12 over the side walls 3 and, if these side walls 3 are detachable, to weld the steel elements 12 to them.

Figure 5 shows a floor element according to the invention, wherein the prestressed concrete beams 7 extend over the full length of the floor slab 13, while Figure 6 shows a floor element, the length of the 10 prestressed concrete beams 7 being equal to the length of the floor element minus the sum of the widths of the supporting edges 14. It will be clear that the floor elements are drawn here, as they come out of the formwork, so upside down.

Figure 7 shows a floor element, the side walls of which extend in the longitudinal direction of the prestressed concrete beams 7, are provided with complementary profiles 15 and 16 extending parallel to the top surface, equidistant therefrom. floor elements are pushed together, these complementary profiles slide into each other, so that when the floor elements are loaded between the supporting edges, they remain fixed relative to each other.

If the floor element has to be insulated at the bottom side, the prestressed concrete beams can be poured into a formwork, which is provided with a lining of insulating material with a more or less porous surface. After the concrete has hardened, the insulation material is firmly attached to it. After pouring the floor slab 30, the insulating material is applied to that part of the floor slab, which is released by the prestressed concrete beams with the exception of the support edges.

8603068

Claims (10)

  1. Method for the production of system floors, consisting of at least one pre-manufactured floor element, which floor element or which floor elements are subsequently mounted at work, characterized in that, at least one beam of prestressed concrete, provided with reinforcement projecting at the top , after, at least next to, complete, curing reversed in a horizontal formwork is mounted at a distance from the bottom of the formwork equal to or less than the desired thickness of the floor slab, which formwork is provided with a flat, smooth seamless , preferably sheet steel bottom and side walls, after which a concrete layer of the desired thickness of the floor slab is poured in this formwork, in which a reinforcement, for instance in the form of a mat of building steel, is or is applied parallel to the bottom, which concrete layer can then be vibrated and after sufficient curing the floor element thus obtained is removed from the formwork.
  2. Method according to claim 1, 20, characterized in that positioning means are arranged in the end faces of the prestressed concrete beams, which co-act with positioning means of a clamping device mounted on the outside of the formwork, between which the beams from prestressed concrete 25 during the pouring and vibration of the floor slab until they are firmly clamped after curing.
  3. Method according to claim 1 or 2, characterized in that, in order to obtain support edges, the length of the prestressed concrete beams is chosen to be at most equal to the length of the floor element minus the sum of the widths of the support edges. while the height of the side walls of the formwork, at least at the location of the supporting edges, is equal to the desired thickness of the floor slab, and a possibly releasable, preferably steel, element with smooth underside is fixed at this location of the side walls and 8603068 II "t - 10 - of the concrete layer is present during pouring and compaction.
  4. Formwork for performing the method according to claims 1, 2 and 3, characterized in that the bottom consists of a flat, smooth, seamless, preferably sheet steel bottom, which can be provided with reinforcing ribs on its underside and on which at least three upright side walls are provided, at least one of which is detachable, which side walls connect two by two.
  5. 5. Formwork for carrying out the method according to claim 2, characterized in that for each prestressed concrete beam, a clamping device consisting of two parts is arranged on the outside of the formwork, which parts are located on either side of the formwork. and provided on the facing sides with positioning means for positioning the beam or beams of prestressed concrete.
  6. 6. Formwork according to any one of claims 4 and 5 for carrying out the method according to claim 3, characterized in that the height of opposite side walls and optionally the height of said connecting side wall at the location where a supporting edge of the floor element must be equal to the desired thickness of the supporting edge and a possibly detachable, preferably sheet steel, element with smooth underside, the width of which is at least equal to the width of the supporting edge, is applied thereon.
  7. Formwork according to any one of claims 4, 5 or 6, 30, characterized in that the longitudinal side walls of the prestressed concrete beam or beams are provided with longitudinal side walls equidistant from the longitudinal direction and parallel to the ground expiring complementary profiles.
  8. Floor element manufactured according to the method of claim 1 or 2, characterized in that it is composed of at least one prestressed concrete beam, on which there is a reinforced concrete floor slab with smooth and flat top and side surfaces, 8603068. which is integral with the beam or beams of prestressed concrete, which beam or beams at the heads can be provided with positioning means and have a length which is at most equal to the length of the floor slab.
  9. Floor element according to claim 8, characterized in that at least two smooth, flat and equally thick supporting edges are present everywhere and the beam or beams of prestressed concrete have a length which is at most equal to the length of the floor element minus the sum of the widths of the supporting edges.
  10. Floor elements according to claim 8 or 9, characterized in that the sidewalls extending in the longitudinal direction of the beam 15 or beams of prestressed concrete are provided with complementary profiles extending in the longitudinal direction and parallel to the top surface. 8603068
NL8603068A 1986-12-01 1986-12-01 A method for manufacturing system floors. NL8603068A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL8603068 1986-12-01
NL8603068A NL8603068A (en) 1986-12-01 1986-12-01 A method for manufacturing system floors.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL8603068A NL8603068A (en) 1986-12-01 1986-12-01 A method for manufacturing system floors.
DE8787202345A DE3771317D1 (en) 1986-12-01 1987-11-26 Method for producing system floors.
EP87202345A EP0273492B1 (en) 1986-12-01 1987-11-26 Method of manufacturing system floors
AT87202345T AT65099T (en) 1986-12-01 1987-11-26 Method for producing system floors.

Publications (1)

Publication Number Publication Date
NL8603068A true NL8603068A (en) 1988-07-01

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ID=19848932

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8603068A NL8603068A (en) 1986-12-01 1986-12-01 A method for manufacturing system floors.

Country Status (4)

Country Link
EP (1) EP0273492B1 (en)
AT (1) AT65099T (en)
DE (1) DE3771317D1 (en)
NL (1) NL8603068A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100000177A1 (en) 2006-11-14 2010-01-07 Srb Construction Technologies Pty. Ltd. False formwork for moulding concrete panels

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510810A (en) * 1948-02-04 1950-06-06 Paul L Furst Siding form
GB675394A (en) * 1950-02-21 1952-07-09 Edward Alexander Benton Improvements in or relating to adjustable moulds for making flagstones and the like
US3072993A (en) * 1960-04-13 1963-01-15 Harbison Walker Refractories Brick molding apparatus for incorporating metal inserts in refractory bricks
GB1240628A (en) * 1969-08-26 1971-07-28 Jan-Olaf Bohlin Load bearing floor
ES230060Y (en) * 1977-07-21 1978-03-16 Modular element for formation of panels on roofs.
US4493177A (en) * 1981-11-25 1985-01-15 Grossman Stanley J Composite, pre-stressed structural member and method of forming same
FR2578276B1 (en) * 1985-03-01 1988-06-03 Rech Etudes Tech Concrete construction element, in particular floor element, and method for the production thereof

Also Published As

Publication number Publication date
EP0273492B1 (en) 1991-07-10
EP0273492A2 (en) 1988-07-06
EP0273492A3 (en) 1988-07-27
AT65099T (en) 1991-07-15
DE3771317D1 (en) 1991-08-14

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