NL8801150A - METHOD FOR PRODUCING ON-SITE CONSTRUCTIVE CONCRETE SHEETS, PRODUCTION UNIT APPLIED FOR THIS AND CONCRETE PLATES AS SUITED. - Google Patents

Description

»

Method for producing structural concrete slabs on site, production unit used therefor and concrete slabs obtained as such.

The invention relates to a method for producing structural concrete slabs, optionally provided with reinforcements and connections, etc. by bringing a premix into the correct shape and allowing it to harden, which is carried out on site, as well as a production used for this method. unit, and concrete slabs obtained as such.

It is known to produce various concrete slabs in the factory and then transport them to the construction site. The use of prefabricated concrete elements, such as walls, slabs and floors, has advantages because it is often possible to work faster and cleaner on the construction site. However, the drawback remains that the transport of concrete slabs is expensive and that damage can easily occur. Due to the high weight of the concrete and the transport caused thereby, floor elements are, for example, made of not too thick slabs, for example with a thickness of 50 mm. As a result, more stamps are needed during construction to support the installation of the plates and their further processing. This makes the processing costs even worse. If one could work with thicker plates, fewer stamps would be needed.

Another application of concrete slabs concerns bank cladding slabs, intended for bank and dike reinforcement above and below the water level.

Such plates must be sufficiently large and heavy and flexible enough to be able to follow ground movements. Here, too, the transport of such products is a problem.

The present invention provides a method for producing structural concrete slabs which is cost-saving compared to the known method in that no storage or transport of the concrete product is required and therefore no transport damage can occur. Furthermore, a method is provided with which, in particular, bank cladding plates 30 can be manufactured on site. The invention also provides a production unit with which such a structural concrete slab can be produced on site, if necessary. It is furthermore intended to design the production unit as a transport container, so that it is also possible for remote places to apply constructive concrete slabs without mounting on a .8801150

X

J

- 2 - be designated as a factory. Finally, the invention includes new structural concrete elements as well as parts available through the present method, as well as a special method of laying floors.

5 Structural concrete elements or slabs refer to those elements that are subject to loads, such as floor slabs and that meet the established NEN standards for reinforced concrete.

The invention thus provides a method for producing concrete slabs by shaping and hardening a concrete premix, pouring the mixture in the correct form into a production unit with at least two or more hinged folding side walls, of which the bottom and side walls contain stiffening sleeves which form a closed circuit with one another and are connectable to a heating unit for circulating a thermal medium, pouring the mixture onto the laid walls and any bottom in the mold, the mixture in a manner known per se smoothing and compacting, after which the plates, formed after the necessary curing time, are removed by displacing the walls of the production unit, starting from constructional concrete slabs, in particular floor slabs, bank covering plates and paving elements. Floor slabs are understood to mean concrete slabs provided with a reinforcement of, for example, spot-welded construction steel net, made of cold-drawn profiled wire, in which slab also usually lattice girders are regularly spaced. This makes the element easier to handle and requires less support.

When installing these floor slabs as a storey floor (also referred to as a screed floor), one needs undercoats (usually wooden beams) that are stamped on the subfloor. These beams protrude through the front and rear facades in order to be able to support the side formwork after the peeling floor has been laid. When pouring the remaining concrete for the required floor thickness, an edge formwork must be constructed at the level of the end floor, including along the facades. Paneling is also required if recesses are present, such as step holes, the paneling running around the recesses. This also requires a lot of carpentry work before pouring the peeling floor, while the formwork must be removed from the peeling floor after installation.

, 8801150 y * - 3 -

In a special embodiment of the invention, storey floors are already poured on site, which already have a fixed edge, here referred to as nose, so that the pouring of the residual floor is simplified. For example, the supports (beams) no longer have to protrude from the facades 5. The height of the nose is set to the total height that the floor must attain, ie the screed floor plus the poured floor. In a variant, the nose is not poured in one piece with the peeling floor, but is poured separately prefabricated, with protruding ends protruding to allow the nose to harden on the newly poured peeling floor.

These can be, for example, protruding bar ends (reinforcing bars) braided in the prefabricated nose. The nose is shaped and sized to match the height of the end floor and thus acts as a measure of the construction height. It is clear that also for peeling floors with recesses 15 a peeling floor can be poured on site, the nose being collapsed along the recesses provided.

When a prefab nose is used, the material thereof need not of course be identical to the material, i.e. the concrete of the peeling floor. It can be light concrete or a plastic or any other suitable material. It is clear that providing an on-site poured nose or prefab nose will enhance construction continuity (no interruptions to carpentry) and thereby accelerate construction. The invention therefore also comprises a method for laying storey floors, characterized by the use of a shell floor with a collapsed nose or prefab nose, wherein the dimensions and shape of the said nose are chosen such that they act as a measure for the construction dump height.

It is also clear that the prefab nose is produced on site; this can also be done elsewhere.

The production unit is preferably designed as a transportable container. The walls of the container are hinged, preferably all walls, these walls having a position of approx

O

75-85 preferably 80 ° in, for example, expanding irons are caught to facilitate release from the plate.

The production units are preferably rectangular in shape, as is customary with transport containers, but it is clear that other shapes can also be used when needed. The condition is that the unit can always be used as a container and is thus easily transportable. The wall surfaces and preferably also the mold bottom are stiffened by means of tube profiles, which are mutually connected and thereby form a closed circuit with connections to a heating unit. This closed circuit gives the advantage that the hardening of the mixture is accelerated by circulation of a heating medium, such as hot water, steam, hot air and the like, so that, even when using a fast-setting concrete mixture, the hardening time of the wall and time of use. It is thus also possible to work quickly in remote places, with the advantage that no highly skilled labor is required. The production unit naturally includes aids such as a mortar mixer, surface roller, hand tools and equator for smooth production of the plates.

The invention is also directed to a production unit for use in the method of the invention, designed as a production container with hinged side walls. This container can be provided with attachments, with which the container can be expanded in the unfolded state. This allows multiple plates of smaller size to be formed at the same time.

The production unit of the invention and the attachment of the nose to a floor slab are further elucidated with reference to the drawing.

In the drawing iS ': figure 1 shows a perspective view of the production unit in the form of a transport container, figure 2 shows the production unit in the unfolded state, figure 3 shows the position that the two side walls 25 have an angle of approximately 80 °. are hinged at the moment of unloading the plate, while figure 4 is a top view of the container in the expanded state, provided with 4 attachments as well as a side view in the folded state. Figures 5 and 6 show front views of a floor plate with molded and applied nose.

In Figure 1, 1 is the production container. In figure 2 the four side walls after deflection are indicated (2, 3, 4 and 5), the hinge connections being schematically indicated by 6 and 7. In this position, the premix is applied to the four surfaces of the side walls, possibly also on the bottom. Use is made here of frames with which the molds are delineated. With the help of these lists it is also possible to set different dimensions of the plates to be poured. When pouring a plate with a nose, one at the top of the plate edge where the nose is to be applied (the facade side or the side with openings). 880 1 1 5 0 - 5 - open raised frame that has the shape of a nose. Thus, the nose is poured in one piece with the plate. The bottom of the production container can also be used as walking space. After the moldings have been applied, the mixture has been poured and compacted and smoothed by a surface roller or otherwise, the poured sheets are allowed to set. A heating medium is circulated through the plates, which is not shown in the drawing for the sake of clarity.

Figure 3 shows the condition that the plates are hardened; the side walls are now placed in a position of 80 °, caught in expanding irons, after which the hardened plate is unloaded. A construction crane or container crane can be used for this. Figure 4 shows the folded-out production container in top view, with 4 attachments 8 included. The diagonals indicate that one can fabricate four plates. As an example, the container can be about 11 m long and 7 m wide, with the four plates each being about 2.5 m by 7 m and 2.5 m by 5.6 m (two by two). In the middle 9 indicates the heating with pump.

In figure 5 the poured floor is indicated with 11 as in figure 6, 20 in which nose 12 is poured on plate 11. This is done by a hollow strip 14 which is placed on the container mold and is open from above, and is secured by bolts. The end floor to be poured is indicated with 13, the nose height being set at this dumping height. It is clear that in the event of any minor variations or changes, the height of the nose can be changed by, for example, using a diamond saw. Figure 6, which shows the construction with loose nose, also shows the dumping height of the end floor 13, the wave line indicating that the subfloor can be poured at different thicknesses. Reinforcements in the form of wire are indicated at 17.

The loose nose 12 is cast with a reinforcement of wire (15) to which irons 16 are fixed at regular intervals. These protrude from the nose at the bottom, when pouring the floor plate 11, these irons are inserted into the not yet hardened cement, whereby the attachment of the nose with plate is effected by hardening.

.8801150

Claims (10)

Method for producing concrete slabs by shaping and hardening a premix by pouring the mixture in the correct shape into a production unit with at least two or more hinged hinged side walls, the bottom and / or which or side walls contain stiffening sleeves, which form a closed circuit with each other and are connectable to a heating unit for circulating a thermal medium, pour the mixture onto the laid walls and optionally the bottom in the mold, the mixture on its own to smooth and compact in a known manner, after which the plates, after the necessary curing time has been formed, are removed by displacing the walls of the production unit, starting from structural concrete plates, in particular floor plates, bank covering plates and paving elements. 2. Method according to claim 1, characterized in that the plates are produced at the place of use. Method according to claim 1, characterized in that, in particular for bank cladding slabs, the concrete mixture contains a plastic reinforcement which gives both strength and flexibility to the end product. 4. Method according to claims 1-3, characterized in that, in particular with floor slabs, a nose or edge is also poured onto the slabs. Method according to claim 4, characterized in that the plates with nose are poured in such a way that the nose height also serves as a measure for the dumping height of the end floor. A method according to claim 5, characterized in that the nose or edge of the plates is poured separately or otherwise manufactured provided with fasteners such as cutting ends, which are inserted into said floor when the peeling floor is poured and it has not yet hardened and nose and floor form one whole through hardening. 30 Floor plates provided with noses or edges obtained according to a method of Claims 4, 5 and 6. Production unit for use in the methods of claims 1-6, characterized in that it is built up of a container with a flat bottom, the side walls of which are hingedly mounted, the walls and the bottom comprising stiffening sleeves which have a closed circuit and connectable to a heating unit. .8801150 - 7 - Production unit according to claim 9, characterized in that fittings are also provided which can extend the flat bottom of the container when unfolded, preferably into a rectangular shape. Method for laying storey floors, using peeling floors, characterized in that peeling floors are used, provided with a nose or edge adjusted to the total height of the floor, ie peeling floors plus poured floor, which edge or nose is arranged along the sides of the peeling floor that require side formwork in the absence of the nose or edge. ----- έ. 8801150