DE2520175A1 - Floor laying on closed base - using intermediate evenly skimmed sieved wood chip layer under superimposed slabs - Google Patents

Abstract

The process is for laying floors on closed bases, such as solid concrete ceilings, or existing old floors, esp. where it is necessary to provide compensation for uneven areas, before a top surface can be applied, involving the use of a loose intervening layer, which is evenly skimmed before a pressure distribution layer of rigid or semi-rigid slab material is set on top. The compensating intervening layer consists of sawn wood chips which is first sieved to effect removal of excessively large or long pieces, and then split to effect a higher slenderness ration along the line of the fibre. The layer is evenly skimmed to a thickness of 5-25 mm, pref. 10 - 15 mm. Slab material pre. in the form of chipboard, fibreboard panels, or plywood, is laid on this, and finally a walkable coating. The chips may be treated with slowly hardening or bonding synthetic resins or other bonding material before spreading.

Description

Procedure for laying floors on closed substrates.

The invention relates to a method for laying floors on closed substrates, with a loose intermediate layer on top of the substrate applied, this peeled off and then a pressure distribution layer made of semi-rigid or rigid plate material. Such documents can be cast from Solid concrete ceilings, existing old floors or the like. exist. Preferably the Invention for use with documents that are somewhat uneven and the same need before a. Surface layer can be attached. It's in this Already known in addition, there is an equalizing intermediate layer on the base and provide a fixed surface area on this (DIS 1 149 156).

The present invention has for its object a method of the above to suggest that this is easy to do and special is economical, and results in an intermediate layer that is not subject to continuous use shows so-called cold flow. Furthermore, there should be a certain dampening effect against footfall noise and warmth can be achieved.

This is achieved according to the invention mainly by the fact that for The intermediate layer of sawdust is used for removal prior to spreading Too coarse and too long particles are sieved, so that at least the sawdust is sieved partly by cutting or splitting the sawdust particles mainly parallel get a higher degree of slenderness for the fiber-rectification of the chips, that such pre-treated sawdust material spread out on the closed base as known, to a thickness of 5-25 mm, preferably 10-15 mm, and then the sheet material laid out on the layer of sawdust that has just been removed and then possibly a Pavement or the like. is attached to the plates.

Sawdust pretreated in this way as an intermediate layer is an inexpensive one Raw material that is also light in weight in relation to its volume, is a poor conductor of heat and has sound-absorbing properties. Another The advantage is that the sawdust particles come to lie in all possible directions, i.e. among other things with their greatest length both parallel to the base and perpendicular this, as well as in many other positions. This gives the sawdust a very good load-bearing capacity, the particles "matt" and unevenness of the surface are balanced. Due to the semi-rigid and rigid sheet material, possible punctiform loads distributed over a larger area.

The cutting or splitting of the sawdust particles is particularly effective with the coarse-grained sawdust fractions. As practical experience has shown, This makes the sawdust material particularly suitable for the targeted Purpose.

The improved slenderness results in an improved one Matting the sawdust particles, making the floor both higher load-bearing capacity and gets better elasticity.

According to further embodiments of the invention, the sawdust treated with binding agent before or after spreading, preferably with at room temperature, i.e. approx. 15-20 C, slowly hardening or setting resins or the like. Through this The addition of resin further increases the Cr-resistance of the sawdust intermediate layer practically unchanged good insulation properties.

A hardening of the sawdust treated in this way can after a further Embodiment of the invention as known by supplying hardener, catalyst or Accelerator initiated or

be accelerated. This means that floors can be fully loaded earlier will. Said supply of hardener, catalyst or accelerator can expediently take place in liquid or gas form in a manner known per se.

Practical tests have shown that floors laid according to the invention low laying and raw material costs and still a good load-bearing capacity without sinking significantly in areas exposed to higher loads.

The invention relates to a sawdust material for execution of the method according to the invention.

The invention will now be described in more detail using an exemplary embodiment.

Sawdust from a sawmill is screened to be too long and coarse Remove particles, i.e. saw waste, wood splinters, branches and bark residues, etc. The sawdust screened in this way becomes different in two or more fractions Particle size divided, with at least the coarsest fraction of a machining or splitting device is fed, in which the sawdust particles mainly Machined or split parallel to the fiber direction and to the fractionation device to be led back. The remaining factions are each for themselves or together fed to a gluing station, with a slightly smaller one in the former case Binder consumption is achievable. The sawdust is deposited in the gluing station with treated with a suitable binder, preferably with at room temperature slowly hardening or setting resins.

The sawdust lateral pretreated in this way, that possibly can be mixed with up to the same amount of other suitable material, for example with wood shavings, cutting shavings, screen shavings from chippers for wood for pulp production, Abrasive chips, wood dust from furniture industries and chipboard factories etc., is spread out on a poured concrete slab and on a through cutting thickness of 10-15 mm evenly deducted. Excess material is removed. Semi-rigid or rigid sheet material is applied to the sawdust layer removed in this way, For example, chipboard designed, the thickness of which depends on the expected Load and thickness of the intermediate layer underneath is to be selected, whereby The main rule is that thicker layers and higher loads use stronger sheet material condition. If you use chipboard as panel material, you bring it with you Advantage of a walking layer by painting or, for example, laying out plastic sheets, Linoleum or other flooring.

Before the rigid or semi-rigid material on the just peeled off A layer of sawdust is applied and if the sawdust is coated with a suitable synthetic resin are glued, it may be necessary to add a hardener, catalyst or accelerator add to accelerate hardening or setting. This addition is made meckweise by finely divided spraying, spraying or the like.

Another option is to use binders too dispense, whereby the shelf life of the chips before spreading is practically unlimited will. However, this advantage can also be achieved by proceeding as follows: sawdust from a sawmill are sifted, fractionated and split as described above, after which the material is distributed without prior addition of binder and possibly before Use is stored. Spread and peel off to the desired thickness as described above. Only then is the binding agent added Harder and possibly also accelerator on the sawdust layer just removed by spraying, Syringes or the like. applied.

Then chipboard or other semi-rigid or Rigid plate material is designed, after which the floor is already accessible.

Another way to supply the hardener is in gaseous form, for example as ammonia gas or sulfur dioxide.

In this case, the plate material is expediently on the just peeled off Sawdust layer laid out and then the hardener in gaseous form through the sheet material existing openings supplied, which are then closed again.

Practical tests have shown that produced according to the invention Floors cost savings and good footfall sound insulation to those underneath Spaces result, while at the same time the sawdust layer has the heat-insulating properties the soil increased and the work of stripping solid concrete ceilings or the like. omitted can.

Although the invention is based on an embodiment of the same has been described, it can still be used within the scope of the following claims be modified.

- patent claims -

Claims (9)

Claims. 1. Process for the production of floors on closed bases, whereby a loose intermediate layer is applied to the base, this is just peeled off and thereon a pressure distribution layer of semi-rigid or rigid sheet material it is attached to the fact that this is a compensatory measure An intermediate layer of sawdust is used, which is sieved before spreading, To remove too large and too long particles, at least the sifted sawdust partly by chipping or splitting the same mainly along the fiber direction Obtain a higher degree of slenderness, that is, the sawdust material pretreated in this way Spread out on the base as known and to a thickness of 5-25 mm, preferably 10-15 mm, peeled off and then the panel material on the peeled saw chip layer designed and possibly a walking surface or the like. is attached to the plates. 2. The method according to claim 1, d a d u r c h g e k e n nz e i c h n e t, dae as semi-rigid or rigid board material wood chipboard, wood fiber board, Plywood, building boards or the like. with a thickness of 2-25 mm, preferably 6-12 mm, be used. 3. The method of claim 1, d a d u r c h g e k e n nz e i c h n e t that sawdust after said screening into two or more different fractions Particle size, as well as that the coarsest fraction of a machining or splitting device is supplied. 4. The method according to claim 1 or 3, d a d u r c h g ek e n n z e i n e t that the sawdust is treated with binding agent before spreading, synthetic resins that harden or bind slowly at room temperature. 5. The method according to claim 4, d a d u r c h g e k e n nz e i c h n e t that the sawdust before treatment with binding agent in different fractions Particle size divided and each fed to a gluing station will. 6. The method according to claim 1 or 3, d a d u r c h g ek e n n z e i c h n e t that the sawdust only after spreading and stripping with binding agent, preferably with resins curable or binding at room temperature by spraying, Spraying or the like. be treated. 7. The method according to claim 4, 5 or 6, d a d u r c h g e k e n n notices that the hardening of the spread and just peeled off, with binding agent treated sawdust by adding hardener, catalyst or accelerator or is accelerated. 8. Sawdust material for carrying out the method of manufacture of floors on closed substrates according to one or more of the above claims, d u r c h e k e n n nz e i c h n e t that the sawdust material is too long and too coarse particles are freed, as well as that it is by cutting or splitting mainly parallel to the fiber direction of the sawdust particles, at least partially is more slim than originally. 9. sawdust material according to claim 8, d a d u r c h g ek e n n z e i n e t that it has been treated with a binder.